Dissertations / Theses on the topic 'Mucosa Orale'
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Kinikoglu, Fatma Beste. "Tissue engineering of full-thickness human oral mucosa." Thesis, Lyon 1, 2010. http://www.theses.fr/2010LYO10310.
Full textTissue engineered human oral mucosa has the potential to fill tissue deficits caused by facial trauma or malignant lesion surgery. It can also help elucidate the biology of oral mucosa and serve as an alternative to in vivo testing of oral care products. The aim of this thesis was to construct a tissue engineered full-thickness human oral mucosa closely mimicking the native tissue. To this end, the feasibility of the concept was tested by co-culturing fibroblasts and epithelial cells isolated from normal human oral mucosa biopsies in a collagen-glycosaminoglycan-chitosan scaffold, developed in our laboratory to construct a skin equivalent. An oral mucosal equivalent closely mimicking the native one was obtained and characterized by histology, immunohistochemistry and transmission electron microscopy. Using the same model, the influence of mesenchymal cells on oral epithelial development was investigated by culturing epithelial cells on lamina propria, corneal stroma and dermal equivalents. They were found to significantly influence the thickness and the ultrastructure of the epithelium. Finally, in order to improve the adhesiveness of conventional scaffolds, an elastin-like recombinamer (ELR) containing the cell adhesion tripeptide, RGD, was used in the production of novel bilayer scaffolds employing lyophilization and electrospinning. These scaffolds were characterized by mercury porosimetry, scanning electron microscopy and mechanical testing. In vitro tests revealed positive contribution of ELR on the proliferation of both fibroblasts and epithelial cells. It was thus possible to construct a viable oral mucosa equivalent using the principles of tissue engineering
Gualerzi, A. "ANALISI MORFOLOGICA DELLA MUCOSA ORALE CHERATINIZZATA UMANA NORMALE DOPO ESPOSIZIONE A STIMOLI ESOGENI." Doctoral thesis, Università degli Studi di Milano, 2013. http://hdl.handle.net/2434/215122.
Full textPloyon, Sarah. "Interactions entre muqueuse orale, salive et molécules de la flaveur." Thesis, Dijon, 2016. http://www.theses.fr/2016DIJOS037/document.
Full textThe role of saliva in food sensory perception is increasingly recognized, especially through physicochemical interactions occurring between salivary proteins and food components. This work focuses on the mucosal pellicle, a layer of salivary proteins anchored onto epithelial cells, and aims at characterizing interactions that may occur between the proteins of the mucosal pellicle and flavour compounds. For that purpose, an in vitro model of oral mucosa was developed. A stable cell line (TR146/MUC1) was obtaining by transfecting the TR146 cell line in order to express the membrane bound mucin MUC1. In order to form a salivary pellicle, confluent cells were incubated with human saliva. A higher retention of salivary MUC5B by TR146/MUC1 cells was observed compared to TR146 cells, emphasising the involvement of MUC1 in MUC5B anchoring to epithelial cells. The model was applied to the investigation of interactions between the oral mucosa and aroma molecules and tannins. Measurements of partition coefficients by GC-FID revealed 1- the role of hydration of the mucosa on the release of the most hydrophilic compounds, 2- the ability of cells to metabolize some aroma compounds, 3- the absence of effect of the mucosal pellicle itself on aroma release at the thermodynamic equilibrium. Oppositely, analyses by PTR-MS evidenced an effect of the mucosa and of the pellicle on aroma release kinetic. Interactions between proteins of the mucosal pellicle and tannins modified structural characteristics of the pellicle, especially the coating of cells by salivary MUC5B. Sensory relevance for the phenomena of aroma persistence and astringency, respectively, are discussed
GIOVANNACCI, ILARIA. "Quantificazione spettrofotometrica dell'autofluorescenza come potenziale strumento diagnostico per lesioni maligne della cute e della mucosa orale." Doctoral thesis, Università degli studi di Modena e Reggio Emilia, 2020. http://hdl.handle.net/11380/1211519.
Full textAutofluorescence (AF) is defined as the fluorescence emission observed when certain cell molecules are excited by UV or visible light of suitable wavelenghts. When a biologic molecule is illuminated at an excitation wavelength within the absorption spectrum of that molecule, it will absorb this energy and be activated from its ground state to an excited state. The molecule (fluorophore) can then relax back from the excited to the ground state by generating energy in the form of fluorescence, at emission wavelengths, which are longer than that of the excitation wavelength. The most important endogenous fluorophores are molecules widely distributed in cells and tissues, like proteins containing aromatic aminoacids, flavins and lipopigments. The main fluorophores of healthy skin are located in the epithelium (eg. keratin, nicotinamide adenine dinucleotide or NADH and flavin adenine dinucleotide or FAD) and the submucosa (e.g. collagen and elastin). These molecules when irradiated between the wavelengths from 375 and 440 nm, show fluorescence in the green spectral range. Nonmelanoma skin cancer (NMSC) is the most common malignancy worldwide. The developement of NMSC is accompanied by histopathological changes in epidermis such as loss of cellular maturation, alteration in keratin production, overall thickening of the epithelial layer and biochemical alterations (NADH decrease). NMSC is also accompanied by histopathological changes in the underlying stroma and submucosa, including neovascularization and destruction of the collagen cross-link by proteases. These alterations lead to a general decrease in AF due the alteration in distribution of the fluorochromes and in particular to NADH and collagen. In the last two decades, studies concerning cell and tissue AF has had a dramatic increase. AF studies have been performed both in vitro and in vivo, for the study of normal tissue and for the discrimination between normal tissues and neoplastic lesions of oral mucosa, skin, esophagus, colon, lung, bronchi, brain and bladder. The methods used are both direct visual fluorescence examination (DVFE) and spectrophotometry. In particular, DVFE has been widely used for clinical studies on oral mucosa. Regarding AF of the skin, this has been studied more frequently by using spectrophotometry. The principle is scanning and analyzing reflected light from the skin after exposure to an activating light source. AF spectroscopy is a very sensitive technique for quantitative measurements of tissue constituents. However, to date no methods have emerged that can be translated into clinical practice. The primary objective of this study is to investigate the correlation between spectral mesurement of cutaneous AF and the histopathological characteristics of malignant and pre-malignant skin in NMSC. Following surgical removal of the cancer, an ex vivo evaluation of the AF will be performed. The specimen will be irradiated with a probe that emits a light in the blue spectrum (wavelength 400-440 nm) and the fluorescence emitted by the tissue will be measured using a spectrophotometer in a standardized spot modality. Any changes detected will be reported on the surgical specimen with the application of a surgical mark. Histopathological examination of the lesion will be performed and any changes in the fluorescence pattern will be correlated with possible alterations in the histopathological pattern, referring to surgical marks. Alterations in AF spectral measurement correlate with histopathological alterations in NMSC. the spectral measurement can be a new support for the early diagnosis of NMSCs, a guide for the targeted incisional biopsies, a tool for the definition of the intraoperative surgical margins, and for the follow-up of treated patients.
Ruberti, Maristela 1975. "Caracterização fenotípica e funcional das células imunocompetentes da mucosa intestinal envolvidas na tolerância oral a ovalbumina." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/317404.
Full textTese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia
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Resumo: Trabalhos anteriores de nosso laboratório mostraram que camundongos transgênicos DO11.10, cuja maioria dos linfócitos T expressam TCR específico para ovalbumina (OVA) no contexto de...Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital
Abstract: Previous work from our laboratory showed that DO11.10 transgenic mice, in which the most of T lymphocytes express TCR specific for ovalbumin (OVA) in the context of...Note: The complete abstract is available with the full electronic document
Doutorado
Imunologia
Doutor em Genetica e Biologia Molecular
WACHSMANN, LEVY DOMINIQUE. "Immunite des muqueuses : etude de la reponse immune locale apres stimulation orale par des antigenes proteiques et polysaccharidiques de streptococcus mutans." Strasbourg 1, 1986. http://www.theses.fr/1986STR13125.
Full textSaid, Zulfahmi. "Analysis of corticosteroid drug delivery using tissue engineered oral mucosa for the treatment of inflammatory mucosal diseases." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/22529/.
Full textSukotjo, Cortino. "Wit 3.0, a novel gene derived from edentulous oral mucosa, encodes cytoplasmic molecules facilitating oral mucosa wound contraction." Restricted to subscribing institutions, 2002. http://proquest.umi.com/pqdweb?did=1568361991&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Full textFonollosa, Pla José María. "Influencia del monómero residual, el diseño y la falta de ajuste de las prótesis dentales con soporte mucoso, en las lesiones de la mucosa oral." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/671700.
Full textIntroducción. La patología de la mucosa oral incluye lesiones y alteraciones relacionadas con el uso de prótesis dentales de soporte mucoso elaboradas con materiales acrílicos, tanto recientes como antiguas. Su etiología puede deberse al traumatismo de un mal ajuste o diseño que no consigue transmitir de forma homogénea las fuerzas oclusales y/o genera roces, contactos y sobrepresiones, sobre la mucosa oral y los tejidos blandos adyacentes. En otras ocasiones serán los elementos químicos de los materiales los responsables de determinadas reacciones mucosas, tanto por restos de monómero libre como de otros compuestos de las resinas acrílicas. Las hipótesis de trabajo, por un lado, apuntan hacia los diseños incorrectos y a la falta de ajuste como posibles causas de determinadas lesiones en la mucosa oral y, por otro, a las técnicas aplicables a los sistemas de procesado del material acrílico autopolimerizable para reducir la presencia de monómero residual y, en consecuencia, evitar reacciones que pueden generar una estomatitis alérgica de contacto en el paciente. Objetivo. Determinar la relación entre las lesiones de los tejidos bucales de etiología protésica, en pacientes portadores de prótesis dentales completas, con aspectos de su diseño, de su falta de ajuste y con los procedimientos de polimerización de los materiales acrílicos con los que se fabrican. Método. Se ha realizado un estudio observacional, descritivo, transversal, de serie de casos, prevalentes, por lo tanto retrospectivo, en pacientes portadores de prótesis dentales completas, completas unimaxilares y parciales removible clase I y II de Kennedy Resultados. Sobre 144 pacientes se han analizado 288 prótesis superiores e inferiores que han originado lesiones agudas y crónicas en un 18,40% por diseño incorrecto y en un 12,15 % por falta de ajuste. Las resinas autopolimerizables con tratamiento durante y después de la polimerización no han generado estomatitis alérgica de contacto en 25 pacientes con prótesis completas - 50 prótesis-, 59 pacientes con prótesis completa unimaxilar y 154 prótesis parciales clase I y II de Kennedy. Conclusión. El diseño incorrecto y la falta de ajuste de las prótesis completase están relacionados con algunas lesiones de la mucosa oral. El tratamiento térmico e hídrico en las resinas autopolimerizables durante y después de su polimerización ha resultado eficaz para evitar la presencia de estomatitis alérgica de contacto.
Introduction. The pathology of the oral mucosa includes injuries and alterations related to the use of mucosal-bearing dental prostheses made with acrylic materials, both recent and old. Its etiology may be due to the trauma of a poor fit or design that fails to transmit the occlusal forces in a homogeneous way and / or generates friction, contacts and overpressures on the oral mucosa and adjacent soft tissues. On other occasions, the chemical elements of the materials will be responsible for certain mucosal reactions, both due to free monomer residues and other compounds of acrylic resins. The working hypotheses, on the one hand, point to incorrect designs and a lack of fit as possible causes of certain lesions in the oral mucosa and, on the other, to the techniques applicable to the processing systems of self-curing acrylic material to reduce the presence of residual monomer and, consequently, avoid reactions that can generate allergic contact stomatitis in the patient. Objective. To determine the relationship between oral tissue injuries of prosthetic etiology, in patients with complete dental prostheses, with aspects of their design, their lack of fit and with the polymerization procedures of the acrylic materials with which they are manufactured. Method. An observational, descriptive, cross-sectional, case series study, prevalent, therefore retrospective, has been carried out in patients with complete, complete unimaxillary and partial removable Kennedy class I and II dental prostheses. Results. Out of 144 patients, 288 upper and lower prostheses have been analyzed that have caused acute and chronic injuries in 18.40% due to incorrect design and in 12.15 % due to lack of adjustment. Self-curing resins with treatment during and after polymerization have not generated allergic contact stomatitis in 25 patients with complete dentures - 50 dentures -, 59 patients with unimaxillary full dentures, and 154 Kennedy class I and II partial dentures. Conclusion. Incorrect design and poor fit of complete dentures are related to some lesions of the oral mucosa. Heat and water treatment of self-curing resins during and after polymerization has been effective in preventing the presence of allergic contact stomatitis.
Gibson, Rachel J. "Chemotherapy-induced mucositis : mechanisms of damage, time course of events and possible preventative strategies /." Title page, table of contents and abstract only, 2004. http://web4.library.adelaide.edu.au/theses/09PH/09phg4481.pdf.
Full textFRANCESCHINI, FABIO GIULIO. "Correlazioni esistenti tra parodontologia e medicina orale. Lesioni delle mucose orali versus malattia parodontale. Aspetti diagnostici e terapeutici." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/19339.
Full textRees, Shiona Rachel. "Allergy and oral mucosal disease." Thesis, University of Glasgow, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368579.
Full textKinikoglu, Beste F. "Tissue Engineering Of Full-thickness Human Oral Mucosa." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612770/index.pdf.
Full textSorrentino, Rita. "Three dimensional oral mucosa models: development and applications." Doctoral thesis, Università del Piemonte Orientale, 2020. http://hdl.handle.net/11579/114910.
Full textSantos, Patricia Barros dos. "Efeito imunomodulatório do resveratrol em células do sistema imune in vitro e na administração via oral de ovalbumina em camundongos." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/9/9134/tde-06082010-142006/.
Full textResveratrol, a polyphenol of natural origin, is described as a substance-inflammatory, antioxidant, cardioprotective and anticancer. Several studies have demonstrated the immunomodulatory activity of resveratrol in vitro and in vivo, stimulating or decreasing the secretion of cytokines involved in Th1/Th2 response. Besides the use as adjuvants in vaccines, the discovery of new immunomodulatory substances can be applied for prophylaxis and treatment of diseases imunodegenerativas with loss of peripheral tolerance or systemic. The aim of this study is to relate the modulating effect of resveratrol on tests of endocytosis in macrophages and secretion of IL-6 (IgA production) and IL-10 (Th2 response and mucosal tolerance) with the production of anti-ova IgG and IgA after oral immunization route. The results of in vitro tests showed an increase of endocytosis in macrophages and decrease in IL-6 secretion by cells isolated from Peyer\'s patches at concentrations below 50 mM of resveratrol. After oral administration of resveratrol 10 mg / kg was observed to significantly increase the secretion of IL-10 in splenocytes isolated from Balb / C. In groups immunized with 1 mg ovalbumin / animal and resveratrol (5 mg and 10 mg / kg) orally two times with 14 days intervals, significant increase of IgG level in relation to the group immunized with ovalbumin only. But the production of IgA in serum and intestinal lavage decreased, indicating a possible increase in oral tolerance. These results demonstrate the immunomodulatory effect of resveratrol in vitro / in vivo and the need for more studies on substance use as a vaccine adjuvant or immunosuppressive drugs mucosa.
Baumgart, Cristina da Silva. "Influência da condição bucal, hábitos e fatores socioedemográficos no padrão citológico da mucosa bucal normal." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/152972.
Full textProposition: To evaluate the association between oral health status, socio- demographic and behavioral factors and standard cytology of the oral mucosa of adult men. Correlating the standard cytopathology quantitative and qualitative with oral and sociodemographic variables. Materials and Methods: From two smears, one edge of the tongue and other oral floor of 117 men over 25 years old, were quantified hundred cells each. Cells were stained with modified Papanicolaou method and classified into: Scales, superficial cells with nuclei, intermediate and parabasal cells. Sociodemographic and behavioral variables were collected from a structured questionnaire. DMFT index and use of prostheses were recorded from a clinical intra - oral.As analyzes were conducted using Stata version 10. The individual was considered the analytical unit. The level of significance was set at 5 %. Results: In total cells at the edge of the tongue 75% were intermediate, 20% core surface scales and 5%, and parabasal cells were rarely observed. No significant differences were observed for all study variables in all cell types, with the exception of beverage intake alcoólicas.Observou is significantly greater percentage of scales and superficial cells in the core subjects ingestores alcohol compared to those who do not drink. For intermediate cells, the percentage was significantly lower in individuals who drink compared to those who do not drink. A similar pattern of cell distribution was observed in the floor of mouth. Alcohol consumption was the only factor that significantly influenced the behavioral cytology of the oral mucosa of individuals analyzed in the multivariate models. Conclusions: An association between a behavioral factor (alcohol) and standard cytology of the oral mucosa of adult men. The other variables were not significantly associated with the default scaling of normal oral mucosa with the technique used.
Silva, Rosiane Maria da 1979. "Diferentes padrões de infiltrado celular e citocinas distinguem formas clínicas da paracoccidioidomicose." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/308980.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas
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Resumo: A paracoccidioidomicose (PCM), micose sistêmica causada pelo fungo Paracoccidioides brasiliensis, apresenta um largo espectro de manifestações clínicas e imunológicas, variando de formas benignas e localizadas a quadros graves e disseminados. A forma crônica ou adulta (FA) se caracteriza por lesões localizadas com acometimento da pele, mucosa oral (MO) e pulmões; enquanto a forma aguda ou juvenil (FJ) é mais grave e disseminada com acometimento do fígado, baço e linfonodos (LNs). Nós examinamos a resposta inflamatória/imunológica em lesões de pacientes com formas clínicas distintas da PCM. Foram analisados a expressão de citocinas e o fenótipo das células presentes nos infiltrados de biópsias de mucosa oral de 15 pacientes com a forma adulta e de linfonodos de 15 pacientes com a forma juvenil da PCM por imuno-histoquímica (IHQ) e qPCR. Anticorpos monoclonais ou policlonais foram utilizados para caracterizar o infiltrado celular (CD68, CD15, CD3, CD8, CD56 e FOXP3), citocinas...Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital
Abstract: Paracoccidioidomycosis (PCM), a systemic disease caused by the fungus P. brasiliensis, presents with a wide spectrum of clinical and immunological manifestations, varying from benign and localized forms to severe and disseminated forms. The chronic or adult form (AF) is characterized by localized lesions with involvement of the skin, oral mucosa (OM) and lungs. While the acute or juvenile form (JF) is more severe and presents disseminated widespread with the involvement of the liver, spleen and lymph nodes (LNs). In order to examine the inflammatory/immune response in lesions of patients with different clinical forms of PCM, we analyzed the expression of cytokines as well as the phenotype of the cells in the inflammatory infiltrate. Paraffin-embedded OM biopsies from 15 patients with the localized AF of PCM and LN from 15 patients with the JF of PCM were analyzed by immunohistochemistry (IHC) and qPCR. Monoclonal or polyclonal antibodies were used to characterize the cellular infiltrate (CD68, CD15, CD3, CD8, CD56, and FOXP3), cytokines...Note: The complete abstract is available with the full electronic document
Mestrado
Ciencias Biomedicas
Mestre em Ciências Médicas
Healy, Claire Marie. "Recurrent oral ulceration : in vivo and in vitro studies." Thesis, Queen Mary, University of London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250670.
Full textTyrer, Peter Charles, and n/a. "Targeting M-cells for oral vaccine delivery." University of Canberra. Health Sciences, 2004. http://erl.canberra.edu.au./public/adt-AUC20060427.122012.
Full textLage, Denise 1979. "Doenças liquenoides da pele e mucosa oral = análise histológica e imuno-histoquímica = Lichenoid diseases of the skin and oral mucosa : histological and immunohistochemical analysis." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/312892.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas
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Resumo: O líquen plano (LP) pode afetar a pele e/ou as mucosas. Histologicamente apresenta infiltrado linfo-histiocitário na junção epitélio-tecido conjuntivo e apoptose de células epiteliais basais. No LP oral (LPO), ocorre erosão frequente pela maior intensidade da necrose. O LP cutâneo (LPC) e o LPO apresentam características histopatológicas similares, mas o curso clínico é diverso. O LPC costuma ter seu curso limitado, enquanto o LPO é frequentemente recidivante. A erupção liquenoide a droga (ELD) desenvolve-se após semanas da ingestão do medicamento e a resolução do quadro é lenta após a interrupção, dificultando o diagnóstico diferencial com o LP idiopático. Os achados clínicos e histológicos podem ser indistinguíveis daqueles do LP, mas a patogênese da ELD não é conhecida. Diferenças locais no sistema imune da mucosa oral e pele poderiam explicar a diversidade no comportamento clínico do LP. Quanto à ELD, há poucas publicações sobre as alterações imunes que atuam no seu desenvolvimento. A citotoxidade celular é mediada, dentre outros mecanismos, por grânulos contendo granzima B e perforina, produzidos por linfócitos T citotóxicos e células natural killers. Com o objetivo de estudar a citotoxicidade celular na patogênese destas doenças, foram analisadas 29 amostras de LPO, 16 de LPC e 6 de ELD. Os cortes foram corados pela H&E e técnica de imuno-histoquímica, para a demonstração de linfócitos CD4 e CD8, macrófagos HAM 56+ e MAC 387+, granzima B, perforina e ICAM-1. As amostras de LPO apresentaram maior densidade de células granzima B+ e perforina+, em comparação às do LPC. Nos dois grupos de doenças, quanto maior era o número de células perforina+, maior era o de células granzima B+. Maior número de células CD4-positivas foi encontrado nas lesões ativas, quando comparado com o das regressivas, no LPO, mas não no LPC. À comparação entre o LPC e a ELD, quanto maior o número de células CD8-positivas, maior era o número de células que expressavam a perforina no grupo LPC. Quanto maiores eram os valores da granzima B, maiores os da perforina, no grupo LPC. Quanto maiores eram os valores da granzima B, maiores os de células apoptóticas agregadas, no grupo da ELD. Nas amostras do LPC, quanto maiores os valores das células T, maiores os dos macrófagos HAM56-positivos e vice-versa. Nas amostras da ELD, foi encontrada correlação negativa entre o número de células T e o de histiocitos jovens (MAC 387+). Havia correlação positiva entre o número de células T e o de células CD8, no grupo da ELD. O mesmo não ocorreu, no grupo do LPC. Concluindo, a expressão aumentada dos grânulos citotóxicos no LPO pode estar associada à maior gravidade da doença na mucosa. Os resultados favorecem um papel mais importante da granzima B e linfócitos TCD8+, no mecanismo patogenético da ELD, comparativamente com o da perforina, de maior importância no LPC. É possível que a ação da granzima B esteja ligada ao número abundante de clusters encontrado na ELD. Embora o LPC e a ELD apresentem semelhanças clínicas e histológicas, a etiopatogênese parece ser distinta
Abstract: Lichen planus (LP) can affect the skin and/or mucous membranes. Histologically it presents lymphohistiocytic infiltrate in the epithelium-connective tissue junction and apoptosis of basal epithelial cells. In oral LP (OLP), erosion occurs frequently by higher intensity of necrosis. Cutaneous LP (CLP) and OLP present similar histopathological features, but the clinical course is diverse. Spontaneous remission is common in CLP, but OLP follows a prolonged course, with periods of remission and relapse. Lichenoid drug eruption (LDE) develops after weeks of drug intake and the resolution of lesions is slow after drug discontinuation, hampering the differential diagnosis with (idiopathic) LP. Clinical and histological findings of LDE may be indistinguishable from those of LP, but LDE pathogenesis is poorly understood Local differences in the immune system of the skin and oral mucosa could explain the diversity in the clinical behavior of CLP and OLP. Regarding LDE, there are few publications on the immune changes that act in its development. Cellular cytotoxicity is mediated, among other mechanisms, by granules containing perforin and granzyme B, produced by cytotoxic T lymphocytes and NK cells. In order to study cellular cytotoxicity in the pathogenesis of these diseases, we analyzed 29 samples of OLP, 16 of CLP and 6 of LDE. The sections were stained for H&E and immunohistochemically targeted with CD4, CD8, HAM 56, MAC387, granzyme B, perforin and ICAM-1. OLP specimens exhibited higher density of cytotoxic granules (perforin and granzyme B) when compared with CLP. In both groups of diseases, the greater the number of perforin+ cells, the greater was the number of granzyme B+ cells. Increased number of CD4+ cells was found in active lesions as compared with the regressive ones in OLP but not in the CLP. The comparison between CLP and LDE revealed that the greater the number of CD8+ cells, the greater the number of cells expressing perforin in CLP group. The higher were the values of granzyme B, the higher the perforin values in the CLP group; the higher were the values of granzyme B, the higher the number of clusters of apoptotic cells in the LDE group. Within CLP group, the higher were the values of T cells, the greater the number of HAM56+ macrophages and vice versa. In LDE samples, negative correlation was found between the number of T cells and young histiocytes (MAC 387+). There was a positive correlation between the number of T cells and CD8 cells in LDE group, but not in CLP group. Concluding, increased expression of cytotoxic granules in OLP may be associated with greater mucosa severity. The results favor a greater role of granzyme B and CD8+ lymphocytes in the pathogenic mechanism of LDE, when compared with perforin, of greater importance in CLP. It is possible that the action of granzyme B is connected to the abundant number of clusters found in LDE. Although CLP and LDE present clinical and histological similarities, the etiopathogenesis appears to be distinct
Doutorado
Anatomia Patologica
Doutora em Ciências Médicas
Blalock, Emily Lauren. "Comparative Study of HPV 16 and HPV 18 Antibody Detection in Serum, Cervical Mucus, and Oral Mucosal Transudate." Digital Archive @ GSU, 2008. http://digitalarchive.gsu.edu/biology_theses/19.
Full textKorkmaz, Hatice. "The translocation and phosphorylation of eNOS in cells of the oral mucosa : the mucous saliva as a regulating factor for translocation and phosphorylation of eNOS in epithelial cells of the rat palatal mucosa /." Köln, 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000254273.
Full textBoard, Davies Emma. "The antibacterial properties of oral mucosa lamina propria-progenitor cells." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/91227/.
Full textRousseau, André. "Cyclin D1 gene amplification and protein overexpression in dysplastic oral mucosa and oral cancer." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0015/MQ53416.pdf.
Full textFerrari, Junia Carolina Linhares. "Utilização do laser de baixa densidade (LILT) para tratamento da mucosite induzida em hamsters : comparação clínica e histopatológica entre parâmetros de irradiação /." Araraquara : [s.n.], 2009. http://hdl.handle.net/11449/104221.
Full textBanca: Rosane Lizarelli
Banca: Marcelo Chaves Donizeti
Banca: Cyneu Pansani
Banca: Elaine Maria Sgavioli Massucato
Resumo: A cavidade oral é alvo freqüente dos efeitos tóxicos dos agentes antineoplásicos por apresentar tecidos com rápida divisão celular, comparável à dos tumores malignos. Uma das complicações orais mais freqüentes da quimioterapia é a mucosite, uma alteração de caráter inflamatório para a qual ainda não existe tratamento definido. Considerando-se a relevância clínica da mucosite, é importante encontrar meios para tratá-la. O presente estudo teve como objetivo avaliar o efeito do LILT na redução da incidência e da severidade da mucosite induzida em hamsters. O quimioterápico 5-FU foi aplicado em 60 animais (distribuídos em 5 grupos) nos dias 0 e 2 do experimento, nas doses de 90 e 60 mL/Kg de peso, respectivamente. Para simular o efeito de uma irritação crônica, as mucosas jugais dos animais foram escarificadas nos dias 3 e 4. Aplicou-se o LILT em 3 pontos da mucosa jugal direita dos animais dos Grupos I, II, III e IV em dias alternados. Os animais do Grupo V não receberam tratamento. Nos dias 8 e 12 do experimento, as mucosas de 6 animais por grupo foram removidas para avaliação histopatológica. A partir de fotografias tiradas diariamente, a mucosite foi classificada clinicamente. O teste de Mann-Whitney demonstrou haver diferenças estatisticamente significantes (p<0,05) entre os grupos tratados com laser e o grupo não tratado quando se comparou, clinica e histopatologicamente, a intensidade da mucosite induzida. Concluiu-se que a aplicação do LILT, nos parâmetros determinados para este estudo, promoveu a redução da severidade da mucosite oral e acelerou a cura das lesões, parecendo haver maior melhora nos animais que receberam 12 e 72 J/cm2.
Abstract: Toxic and dose-limiting effects of antineoplastic agents in oral cavity are frequently observed during cancer therapy. The available therapies are not able to destroy tumor cells without causing damage to the rapid dividing cells in normal tissues like the epithelial cells in the oral mucosa. Mucositis is the most debilitating side effect, for which there is no established treatment. Considering the clinical significance of mucositis, it is important to find ways to treat this condition. The present study was conducted to evaluate the LILT effects on reduction of chemotherapy-induced mucositis in hamsters. Mucositis was induced in 60 animals with intraperitoneal injections of 5-fluorouracil (5-FU) on days 0 and 2, associated with cheek pouches scarification on days 3 and 4. Animals were dived in 5 groups and groups I, II, II, IV and V received laser irradiation at three points in right cheek pouch, at alternate days. Group V received no treatment. The cheek pouches of 6 animals in each group were dissected for histophatological examination on days 4 and 12. Daily photographs were taken and mucositis was clinically scored. The nonparametric test of Mann- Whitney showed statistical difference between treated and non treated group (p<0.05). It was concluded that the LILT protocols established for this study reduced the severity of oral mucositis and accelerated the healing process, with better results when 12 and 72 J/cm2 were used.
Doutor
Rodriguez, Francisco Jose. "Oral mucositis in children receiving bone marrow transplantation." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2008m/rodriguez.pdf.
Full textRibeiro, Mariana Goveia Melo. "Detecção e genotipagem do papilomavírus humano (HPV) em mucosa oral de pacientes do Estado de Sergipe, Brasil." Universidade Federal de Sergipe, 2014. https://ri.ufs.br/handle/riufs/3253.
Full textA infecção pelo Papilomavírus Humano (HPV) é a doença viral sexualmente transmissível mais prevalente no mundo. Suas infecções podem variar de assintomáticas à indução de Carcinomas de Células Escamosas. Entre os agentes infecciosos associados ao câncer oral, tem-se discutido a correlação da infecção por HPV em mucosa oral e o desenvolvimento e/ou agravamento das lesões. O objetivo deste estudo foi avaliar a ocorrência do HPV e seus genótipos em pacientes com lesão oral e em mucosa oral saudável de usuários e não-usuários de drogas no estado de Sergipe, Brasil. Foram avaliados 39 pacientes com idade entre 2 e 83 anos, com lesões clinicamente detectáveis na mucosa oral e 106 pacientes com mucosa oral saudável entre 11 e 79 anos. As amostras foram coletadas por esfoliação da mucosa oral. Para o controle de qualidade da extração de DNA foi utilizado PCR para beta-globina. DNA-HPV foi detectado utilizando primers MY09/MY11 e GP5+/GP6+. A genotipagem foi realizada através de multiplex-PCR com primers específicos para os tipos virais 6, 16 e 18. Nosso estudo detectou DNA-HPV em todos os tipos de lesões avaliadas. A prevalência do HPV foi de 76,92% (30/39) nos pacientes com lesões orais. O tipo viral mais frequente foi o HPV-6, presente em 56,67% (17/30), seguido do HPV-18 em 26,67% (8/30) e do HPV-16 em 6,67% (2/30). DNA-HPV foi encontrado em 83,02% (88/106) dos pacientes com mucosa oral sadia. O tipo viral mais frequente foi o HPV-6, presente em 45,45% (40/88), seguido do HPV-18 em 35,23% (31/88) e do HPV-16 em 4,54% (4/88). Entre usuários de múltiplas drogas 86,67% (52/60) foram positivos e infecções múltiplas por mais de um tipo viral foram identificadas em 23,08% (12/52) dos indivíduos. Entre os "não usuários" a taxa de infecção pelo HPV foi de 78,26% (36/46). Desta forma, foi verificada uma alta ocorrência do HPV em nosso estudo, tanto em lesões orais quanto em mucosas saudáveis. As taxas de detecção do vírus em cavidade oral variam acentuadamente no mundo e tornam a relação do HPV com o processo de carcinogênese oral ainda controversa. Isso faz necessária a realização de estudos adicionais que avaliem o papel do Papilomavírus Humano no desenvolvimento de lesões na mucosa oral. Há poucos dados disponíveis sobre a frequência de infecção oral por HPV na população brasileira e especialmente entre usuários de drogas. Novos estudos sobre a prevalência do HPV entre usuários de drogas são necessários para melhor compreensão da sua exposição ao vírus e o desenvolvimento de estratégias de prevenção.
Cox, Stephen Clive. "Studies in areca nut use & its possible role in oral pre-malignancy & oral submucous fibrosis." Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/4714.
Full textLima, Marina de Deus Moura de. "Correlação entre a presença do HPV na boca e no colo uterino de pacientes com sorologia positiva e negativa para o HIV." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/23/23141/tde-29092009-091212/.
Full textHuman papillomavirus (HPV) is one of the most prevalent sexually transmitted viruses worldwide with both oral and genital manifestations. The high prevalence of HPV infection among HIV + individuals provides an opportunity to elucidate the relationship between oral and cervical HPV-infection in this group of subjects. The aim of this study is to evaluate the possible association between oral and cervical infections in HIV-positive and negative patients. One hundred HIV+ (group 1) and 100 HIV- (group 2) women were recruited consecutively from a gynecologic clinic between April 2008 and May 2009. All subjects were given a cervical and oral examination. Cytological samples were evaluated by the hybrid capture 2 technique from oral and cervical scrapings. Statistical analysis was performed using chi-square test and p values < 0.05 were considered significant. HPV-DNA was detected in cervical scrapings from 41 (41%) HIV-positive subjects and from 45 (45%) HIVnegative subjects (p=0.67). In oral samples, HPV-DNA was observed in 11 subjects from group 1 and in 2 subjects from group 2 (p=0.02). High-risk HPV subtypes were prevalent in both groups and no difference between the groups was detected (p=0.87). No subject showed macroscopic oral HPV-related lesion, whereas 15 (15.00%) from group 1, and 17 (17.00%) from group 2, presented with macroscopic genital lesion (p=0.2129). HPV-DNA was more frequent in oral mucosa of HIV+ patients than HIV- (p=0,018). There was no association between oral and cervical HPV infection in HIV+ and HIV- patients. Presence of cervical lesion was not associated with oral lesion.
ALBUQUERQUE, Monica Regina Barros de Moura. "Melanoma Maligno de Mucosa da Região de Cabeça e Pescoço e de Mucosa Oral: Frequência Relativa e Estudo Clínicopatológico." Universidade Federal de Pernambuco, 2012. https://repositorio.ufpe.br/handle/123456789/12650.
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Introdução: O melanoma maligno mucoso de cabeça e pescoço é uma neoplasia rara, consistindo em cerca de 0,2% a 8% dos melanomas que acometem outras localizações do corpo. A maior ocorrência do melanoma mucoso oral é, em média, de 41 a 60 anos de idade. A patogênese da doença é desconhecida e os seus principais fatores prognósticos são: estágio da doença; profundidade de invasão; invasão vascular; necrose; população de células tumorais polimórficas; aumento da idade; desenvolvimento de metástases linfonodais distantes; ulceração; locais anatômicos; pigmentação melânica. Os locais mais acometidos da cabeça e pescoço são as cavidades oral e nasal, as regiões do palato duro, gengiva e rebordo alveolar. Objetivo: Verificar a frequência relativa do melanoma maligno de mucosa de cabeça e pescoço (cavidade oral, rinofaringe, orofaringe e seio maxilar) e suas características clínico-patológicas em um período de 20 anos (1991 a 2010) em hospital de referência para tratamento de câncer no Estado de Pernambuco. Métodos: A coleta de dados ocorreu no Departamento de Patologia do Hospital de Câncer de Pernambuco (HCP) no período compreendido entre outubro de 2010 a dezembro de 2011. Foram obtidos 889 casos de melanoma cutâneo e mucoso em diversas regiões anatômicas. Através de consulta aos laudos e prontuários dos pacientes e, posteriormente, da obtenção de blocos de parafina e lâminas, foram excluídos os casos de melanomas cutâneos, os de melanomas mucosos em regiões que não foram em cabeça e pescoço e os casos que representaram lesões secundárias a partir de primários cutâneos. Foram selecionados para o presente estudo 08 casos de melanoma mucoso em cabeça e pescoço. As lâminas histológicas foram analisadas quanto aos aspectos dos elementos histopatológicos que interferem no prognóstico. Todos os dados clínicos e anatomopatológicos aferidos foram registrados em uma ficha padrão, tendo por base o protocolo padrão da Sociedade Brasileira de Patologia (2005). Resultados: Dos 08 casos selecionados (0,90%), observou-se a predominância da lesão na faixa etária entre 51 e 60 anos e entre 71 e 80 anos, com a proporção de 1:1 entre os sexos. A maior ocorrência da lesão foi na região do lábio: lábio superior (37,5%) e lábio inferior (25%), mucosa jugal (12,5%), palato duro (12,5%) e região submandibular (12,5%). Os principais fatores prognósticos encontrados foram: morfologia celular fusiforme, ulceração, espessura de tumor de 4 a 8,3 mm, nível de Prasad et al. (2004), II e III; nível de Clark IV e V, índice mitótico de 1 a 8, infiltrado linfocitário intratumoral, infiltrado inflamatório peritumoral, formação de satélites microscópicos e linfonodos acometidos. Conclusões: O melanoma maligno mucoso primário de cabeça e pescoço é uma enfermidade pouco comum no Hospital de Câncer de Pernambuco. Não se constatou diferença de acometimento entre gêneros. As faixas etárias de maior ocorrência localizam-se após a 5ª década de vida. A região anatômica mais acometida foi o lábio superior. Houve maior frequência das características associadas a um pior prognóstico, tais como presença de ulceração, nível de invasão III de Prasad, níveis IV e V de Clark e profundidade de invasão de 8,0 a 8,3 mm.
Ng, William Man Fai. "The effect of volatile thiol compounds on permeability of oral mucosa." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26508.
Full textDentistry, Faculty of
Graduate
Kulkarni, Upendra D. "Optimization of porcine buccal mucosa for in vitro evaluation." Scholarly Commons, 2007. https://scholarlycommons.pacific.edu/uop_etds/652.
Full textTupper, Satt Andrea Cecilia. "Daño oxidativo en individuos fumadores y no fumadores con mucosa oral clínicamente sana utilizando citología oral en base líquida." Tesis, Universidad de Chile, 2006. http://repositorio.uchile.cl/handle/2250/144008.
Full textLos individuos fumadores presentan cambios invisibles en la mucosa oral clínicamente sana, los cuales han sido detectados en estudios citológicos. No ha sido adecuadamente establecido si el tabaco es capaz de producir daño oxidativo en el ADN de las células de la mucosa oral expuesta al tabaco, mecanismo que podría estar involucrado en la carcinogénesis oral. El objetivo de este trabajo fue detectar daño oxidativo en células de la mucosa oral del borde de lengua de individuos fumadores y no fumadores y asociarlo con las variables edad e intensidad del hábito de fumar. Además, cuantificar los tipos de células queratinizadas. Se obtuvieron 30 muestras citológicas de individuos fumadores de más de 10 cigarrillos al día por más de 5 años y una muestra pareada por edad y sexo de individuos no fumadores, ambos grupos con mucosa oral clínicamente sana. Las muestras fueron obtenidas con cepillos para frotis Cervex brush Prep R R , procesadas con el sistema de citología en base líquida Thin Pap system de Cytyc Corporations UK y teñidas con el anticuerpo monoclonal para la detección de 8-OHdG (8 –hydroxyguanine) principal marcador de estrés oxidativo en el ADN y, además con PAP. La intensidad de tinción nuclear fue cuantificada utilizando el programa de procesamiento de imágenes Image J (NIH). Encontramos que los individuos fumadores presentaron un valor promedio de tinción nuclear mayor que los no fumadores, 183.21; DS. 15.87 y 160.95; DS. 20.84 (p=0,000019) respectivamente. No encontramos relación entre el promedio de tinción nuclear y la edad e intensidad del hábito de fumar. Además se observaron porcentajes similares de los tipos de células queratinizadas en fumadores y no fumadores. Concluimos que las células de la mucosa oral del borde de lengua de los individuos que fuman presentaban mayor daño oxidativo en el ADN, evidenciables con técnicas citológicas no invasivas. Esta metodología podría utilizarse para el monitoreo de pacientes con hábitos asociados a mayor riesgo de desarrollo de cáncer oral.
Financiado por Proyecto DID de Iniciación I-12 03/10-4 Vicerrectoría de Asuntos Académicos. Universidad de Chile.
Mörée, Agnes. "Gold and mercury in the oral mucosa in patch-tested patients with oral lichen lesions." Thesis, Malmö högskola, Odontologiska fakulteten (OD), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-19701.
Full textKim, Yeon Jung [UNESP]. "Avaliação do efeito da Artin M no processo de repação em mucosa mastigatória." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/104723.
Full textConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Artin M é uma lectina purificada de sementes de Artocarpus heterophyllus que, recentemente, mostrou-se capaz depromover aceleração da cicatrização de lesões por queimadura de pele ou por abrasão da córnea em ratos e coelhos. O objetivo desta tese foi avaliar os efeitos da Artin M no processo de reparação da mucosa mastigatória bucal, por meio de modelos de estudo in vivo. Primeiro estudo: Três feridas cirúrgicas circulares de 6 mm de diâmetro foram criadas na mucosa palatina de 20 cães, e divididas aleatoriamente em 3 grupos de acordo com os tratamentos: C – controle (não tratados), A - Artin M, V - veículo. Quatro animais de cada grupo foram sacrificados após 2, 4, 7, 14 e 21 dias póstratamento e suas maxilas analisadas clinicamente quanto ao padrão de cicatrização, seguido de análise histológica, imuno-histoquímica para antígeno nuclear de proliferação celular (PCNA) e atividade de mieloperoxidase. Clinicamente, o grupo A demonstrou melhor cicatrização em todos os períodos quando comparada aos outros grupos (p<0,05). A análise histológica mostrou ter havido no grupo A maior estimulação na produção de fibras colágenas, maturação do tecido de granulação e organização do epitélio. A imunolocalização de PCNA mostrou uma maior tendência na proliferação celular em lesões do grupo A principalmente nos dias iniciais (p<0,05). O influxo de neutrófilos mostrou-se estatisticamente aumentado no grupo A quando comparado aos outros grupos nos dias 2 e 4 (p<0,05). Conclui-se que a Artin M promoveu aceleração na reparação das feridas na mucosa mastigatória em cães, via recrutamento de neutrófilos e indução da proliferação celular. É bem conhecido o envolvimento de mediadores biológicos como citocinas...
Artin M, lectin from Artocarpus heterophyllus seeds, has been demonstrated to stimulate recruitment and activation of neutrophil and mast cells. Furthermore, it has been shown to accelerate the process of wound healing on burn injuries and corneal epithelial lesions in rats and rabbits, respectively. The aim of this study was to evaluate the effects of Artin M on wound healing in palatal mucosa in two animal models. Study 1: Three wounds of 6 mm full thickness were surgically created in the hard palate mucosa of twenty dogs. The wounds of each animal were randomly divided into three groups according to one of the treatment assigned: C– Control (nontreated), A- Artin M gel, and V– Vehicle (carboxymethylcellulose 3% gel). Four animals per group were sacrificed at 2, 4, 7, 14 and 21 days post-surgery. Before sacrifice, wounded areas were photographed and scored for macroscopic healing evaluation. Afterwards, maxillary tissue were harvested and divided to perform histological analysis, immunohistochemical staining against Proliferating Cell Nuclear Antigen (PCNA) and measurement of myeloperoxidase activity. Clinical analysis showed that wound closure was accelerated in group A in comparison to other groups in all periods. Histological features showed enhanced reepithelization and collagen fiber formation resulting in faster maturation of granular tissue in group A compared to the other groups, by day 14. Artin M treatment significantly induced cells proliferation at day 2 and 4 (p<0.05). Neutrophils infiltration in the group A was significantly higher than in the other groups at days 2 and 4 (p<0.05). The results suggest that Artin M gel may potentially facilitate wound healing on palatal mucosa via the recruitment of neutrophils and promotion of cells proliferation. It is well known that cytokines and growth... (Complete abstract click electronic access below)
Villouta, Bascuñán María-Renée. "Frecuencia y expresión clínica de lesiones de mucosa oral en pacientes del Servicio de Diagnóstico." Tesis, Universidad de Chile, 2010. http://repositorio.uchile.cl/handle/2250/134422.
Full textAutor no autoriza el acceso a texto completo de su documento
El objetivo de este estudio fue determinar las patologías de la mucosa oral más frecuentes entre los pacientes que acuden al Servicio de Diagnóstico de la Facultad de Odontología de la Universidad de Chile, y su asociación con factores demográficos. Se llevó a cabo un estudio descriptivo retrospectivo donde se analizaron las fichas clínicas y registros de 14.479 pacientes que acudieron al servicio entre Enero de 2001 y Diciembre de 2008, registrándose, edad, sexo, diagnóstico, localización anatómica y expresión clínica de las lesiones. El 3.40% (n=493) de los pacientes presentaron patologías de la mucosa oral, de ellos 65.11% mujeres y 34.88% hombres. Las lesiones más frecuentes fueron las reaccionales (23.32%), la localización anatómica más frecuente fue la cara interna de la mejilla (19.91%) y lengua (19.49%). La expresión clínica más frecuente fue el tumor (34.92%). Las diez lesiones de mucosa oral más frecuentes fueron el pseudofibroma (15.41%), Liquen plano (8.52%), UROs (8.11%), Candidiasis (7.10%), Granuloma telangectásico (6.50%), CEC (6.90%), Penfigoide mucoso (5.07%), Papiloma (4.26%), Leucoplasia (3.66%) y Queilitis Actínica (2.84%). Los resultados del presente estudio coinciden en gran medida con los reportados por la literatura internacional.
OKA, TOHRU, MASARU NAGAYAMA, TOSHIO KANEDA, and MINORU UEDA. "Clinical Evaluation of Reversed Dermis Graft for Reconstruction of Oral Mucosa." Nagoya University School of Medicine, 1986. http://hdl.handle.net/2237/17490.
Full textAl-Johani, K. "Outcomes of therapy of immunologically-mediated diseases of the oral mucosa." Thesis, University College London (University of London), 2010. http://discovery.ucl.ac.uk/751812/.
Full textRivarola, de Gutiérrez Emilce M. "Tratamiento con antioxidantes locales de patologías inflamatorias de la mucosa oral." Doctoral thesis, Universidad Nacional de Cuyo. Facultad de Ciencias Médicas, 2015. http://bdigital.uncu.edu.ar/10031.
Full textFil: Rivarola de Gutiérrez, Emilce M.. Universidad Nacional de Cuyo. Facultad de Odontología.
Best, Mark. "Oral mucosa-nanoparticle interactions and uptake pathways in formulation excipient profiling." Thesis, University of Brighton, 2014. https://research.brighton.ac.uk/en/studentTheses/dbad162f-6df6-40d6-ac5d-148d77b5aff8.
Full textFerrari, Junia Carolina Linhares [UNESP]. "Efeito do laser terapêutico na mucosite induzida por 5-fluoruracila (5-FU) em hamsters." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/95486.
Full textConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
A cavidade oral é alvo freqüente dos efeitos tóxicos dos agentes antineoplásicos por apresentar tecidos com rápida divisão celular, comparável à dos tumores malignos. Uma das complicações orais mais freqüentes da quimioterapia é a mucosite, uma alteração de caráter inflamatório para a qual ainda não existe tratamento definido. Essa complicação oral provoca desconforto e dor severa, dificulta a alimentação e pode determinar a interrupção do tratamento antineoplásico. Considerando-se a relevância clínica da mucosite, é importante encontrar meios para tratá-la. O presente estudo teve como objetivo avaliar o efeito do laser terapêutico na redução da incidência e da severidade da mucosite induzida em hamsters. O quimioterápico 5-FU foi aplicado em 60 animais nos dias 0 e 2 do experimento, nas doses de 90 e 60 mL/Kg de peso, respectivamente. Para simular o efeito de uma irritação crônica, as mucosas jugais dos animais foram escarificadas nos dias 3 e 4. Aplicou-se o laser terapêutico (InGaAlP, 683 nm, 12 J/cm2) em 5 pontos da mucosa jugal direita e esquerda de 30 animais (Grupo I), durante 7 dias. Os animais do Grupo II não receberam tratamento. O Grupo III (controle negativo) foi composto por 5 animais que não receberam o protocolo de indução de mucosite. Nos dias 0, 4, 8, 12 e 15 do experimento, as mucosas de 6 animais dos Grupos I e II foram removidas para avaliação histopatológica. A partir de fotografias tiradas diariamente, a mucosite foi classificada clinicamente. O teste de Mann-Whitney demonstrou haver diferenças estatisticamente significantes (p<0,05) entre o grupo tratado com laser e o grupo não tratado quando se comparou, clinica e histopatologicamente, a intensidade da mucosite induzida. Concluiu-se que a aplicação do laser de baixa intensidade, nos parâmetros determinados para este estudo, promoveu a redução... .
Toxic and dose-limiting effects of antineoplastic agents in oral cavity are frequently observed during cancer therapy. The available therapies are not able to destroy tumor cells without causing damage to the rapid dividing cells in normal tissues like the epithelial cells in the oral mucosa. Mucositis is the most debilitating side effect, for which there is no established treatment. This oral complication restricts intake of food and liquids, causes discomfort, severe pain and may determine interruption of the cancer therapy, interfering on the disease control. Considering the clinical significance of mucositis, it is important to find ways to treat this condition. The present study was conducted to evaluate the laser therapy effects on prevention or reduction of chemotherapy-induced mucositis in hamsters. Mucositis was induced in 60 animals with intraperitoneal injections of 5-fluorouracil (5-FU) on days 0 and 2, associated with cheek pouches scarification on days 3 and 4. Thirty animals (Group I) received laser irradiation at five points in each cheek pouch, for seven consecutives days. Laser parameters were set to 685 nm, 12 J/cm2 and 30 mW. Other 30 animals (Group II) received no treatment. In Group III, 5 animals represented the baseline control. The cheek pouches of 6 animals from Groups I and II were dissected for histophatological examination on days 0, 4, 8, 12, and 15. Daily photographs were taken and mucositis was clinically scored. The nonparametric test of Mann-Whitney showed statistical difference between treated and nontreated group (p<0.05). It was concluded that the low intensity laser therapy protocol established for this study reduced the severity of oral mucositis and accelerated the healing process, although it has not prevented the appearance of oral manifestations.
Barrett, Andrew W. "Immunological studies of human oral mucosal Langerhans cells." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333511.
Full textGovender, Shogan. "Oral physiological pigmentation in a Western Cape sample." University of the Western Cape, 2018. http://hdl.handle.net/11394/6514.
Full textOral physiological pigmentation presents with great variability with respect to sites, forms, patterns and contrasts in colour. Knowledge of the existence of pigmented lesions and their significance remained unclear for both the general public and oral clinicians alike. The possibility of malignant transformation of some pigmented lesions makes them important to monitor and biopsy. The prevalence of physiological pigmentation is unknown for the defined population group in this study. The results will be beneficial as part of a larger multicentre study with South Africa (Feller et al, 2015). Methodology: A cross sectional analytical study of patients that attended the University of the Western Cape Oral Health centres for routine treatment was conducted. After obtaining informed consent, patients were screened and asked a series of questions using a standardized questionnaire. From these completed questionnaires a prevalence relating to oral physiological pigmentation was determined. Oral physiological pigmentation did not have a male or female predominance in this study population group, but was associated with increased age. Oral pigmentation seemed to be well represented after 18 years of age. Patients were not usually aware of the pigmented gingiva unless being made aware off it.
Ahmed, Zeeshan. "Diffusivity of non-spherical nanomaterials in intestinal mucus." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASS136.
Full textAbstractOral delivery is often preferred to invasive parenteral routes, provided that drug physicochemical and pharmacokinetics characteristics are adequate. However, effective delivery of many fragile and/or poorly absorbed drugs still represents unfulfilled challenge for the pharmaceutical community because at least one of the following drawbacks: (i) large drug dilution and/or destruction in biological fluids. (ii) insufficient residence time in front of the absorptive due to peristaltism and clearance mechanisms. (iii) low apparent permeability of the intestinal membrane.Encapsulation of drugs in adequately engineered nanoparticles showed its ability to partially solve some aspects of these drawbacks, thanks to increases in residence time and local drug concentration in vicinity of the mucosal wall. While the effect of NP size and surface properties on their mucoadhesive characteristics has been extensively studied, the production of non-spherical nanoparticles from pharmaceutically acceptable polymers has recently been made feasible. In this context, the main objective of this thesis was to investigate the impact of Nps shape on their mucoadhesive behaviour. The experimental work consisted in : (i) producing and characterizing a library of NPs with controlled shape and (ii) to study the impact of NP morphology on their diffusivity into the intestinal mucus lining the intestinal epithelium. Elongated and disc shape NPs were designed by stretching of spherical poly(alkylcyanoacrylate) NPs using a poly(vinyl alcohol) film stretching method. Alternatively, flattened hexagonal platelets were obtained by self-association of hydrophobically-modified polysaccharides and alpha-cyclodextrin. Whatever their shape, these particles were surface decorated with chitosan, thiolated chitosan and hyaluronic acid. Their diffusive behaviour in mucus has been investigated by single particle tracking after fluorescent-labelling and detailed analysis of their trajectories. As a general picture, both polysaccharidic surface decoration and shape had an impact on NPs diffusion. In accordance with the heterogenous microstructure of the mucus, analysis of particles trajectories suggested that diffusion occurred mostly in confined spaces. As well, immobilization in the mucus depended both on polysaccharidic shape and surface decoration. Mucoadhesive chitosan and thiolated chitosan particles were mostly immobilized, while hyaluronic acid decorated platelets where more diffusive in comparison
Nilsson, Jan Anders. "Aldehyde toxicity in human oral epithelium /." Stockholm, 2004. http://diss.kib.ki.se/2004/91-7140-141-5/.
Full textWickström, Claes. "MUC5B from the oral cavity identification of 'insoluble' assemblies and putative regulatory proteolytic events /." [Malmö] : Faculty of Odontology, Malmö University, 2002. http://catalog.hathitrust.org/api/volumes/oclc/51310732.html.
Full textSant'Ana, Thalita Araújo. "Atividade mucosotrópica do Papilomavírus Humano (HPV) no processo carcinogênico em diferentes sítios de infecção." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/87/87131/tde-26022018-135022/.
Full textHuman papillomavirus (HPV) is one of the most prevalent infections of the current world, with sexual behavior being one determining fator of infection. The objective of this study was to study HPV in different sites of infection, seeking a better understanding of its mechanism and spreading. Cervical, oral and blood mucosa samples from 50 female patients were analyzed. HPV-16, HPV-18, HPV-31 and HPV-33 were identified. No patient was negative in the four types at all three sites. HPV-16 was the most detected and the most prevalent in the three sites, simultaneously, 32 patients presented this profile. All viral types present in the blood were also present in the cervical mucosa, oral mucosa, or both. Six cytological findings were identified, suggestive of infection by HPV. Detection of viral transcripts of E6, E6 / E7 and L1 was performed at the three sites. The results of our study demonstrate the high prevalence of HPV, viral activity in the three sites analyzed and the probable virus spreading.
Silva, Monica Maria Coquemala da. "Avaliação da permeabilidade de fármacos antirretrovirais por meio de modelo ex vivo com emprego de segmentos da mucosa bucal de suínos." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/9/9139/tde-26042016-154336/.
Full textThe oral route of administration is the preferred mode of administration of drugs according to the advantages which features, among which stand out: patient compliance, convenience and practicality. Because of this, most of the marketed drug is available in pharmaceutical form for oral administration, however, the success of a drug therapy in this way requires that the drug intestinal absorption is sufficient to ensure their availability at the site of action (VOLPE, 2010). However, the drug absorption in the gastrointestinal tract is complex and may be influenced by various factors which have an impact on the dissolution, solubility and permeability of the drug. In order to increase the bioavailability of drugs, which have impeded absorption by oral route of administration from oral mucosa has been an alternative the pharmaceutical today. This mucosa is not keratinized tissue, highly vascular and shows metabolizing enzymes. These characteristics allow good absorption of drugs occurs without presystemic metabolism or first-pass effect, adding to the fact that this display easy accessibility for the administration of drugs (Vries, M. E et al, 1991;. NIELSEN, H. M & RASSING, M. R, 1999). In this sense, this study aimed to evaluate the permeability of antiretroviral drugs (lamivudine and stavudine) through ex vivo model segments of the oral mucosa of pigs with use of diffusion chambers type Franz cells. To evaluate the oral permeability of antiretroviral drugs, lamivudine and stavudine, and markers for transcellular transport (metoprolol) and paracellular (sodium fluorescein), used ex-vivo method, Franz cells, with buccal mucosa segment of swine ( at 37, through Krebs-Ringer- HEPES, pH 7.4) and Franz subsequent analysis of concentrations of the permeated substances (drugs and markers) by high-performance liquid chromatography. The results obtained using the protocol developed demonstrate that transport through the paracellular pathway (marker fluorescein) was higher than that transcellular transport (marker metoprolol), which probably is due to the intercellular spaces of the oral mucosa are looser than those observed in the intestinal mucosa (tight junctions). The lamivudine and stavudine, the permeability results indicate that these drugs permeated by a mechanism similar to that of metoprolol, by transcellular pathway.
Sgarbosa, Silvia Helena Pereira Vergili. "Análise histológica, histoquímica e imunohistoquímica da mucosa de palato duro em pacientes portadores de síndrome de Apert." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/25/25142/tde-03072009-143022/.
Full textThe aim of this study was to evaluate the oral mucosa of patients with Apert syndrome attended at the Hospital of Rehabilitation and Craniofacial Anomalies. The gingivectomy was realized in twelve patients with gingival lateral swellings targeting orthodontic accessories. The specimens were submitted for histological, morphometric, histochemistry (PAS, Alcian Blue, picrossirius) and immunohistochemistry analysis to evaluate cell proliferation with P63 protein, and identification of the collagens I and III and decorin. The histological analysis showed a hyperplasic epithelium, areas of thick collagen fibers in the connective tissue with inactive fibroblasts, different that revealed in the control group. The proportion of the components of the connective tissue between the Aperts syndrome and the control groups wasnt statistical significant. The histochemicals features showed a high concentration of glycosaminoglycans in the connective tissue of Aperts syndrome compared with that revealed in the control group. The picrossírius stained, in the confocal microscope and in the Image Pro-Plus system showed the presence of dense collagen fibers in the Aperts syndrome group, but the statistical analysis wasnt significant between the both groups. The correlation between the collagen area and the age of the patients wasnt statistically significant. The analyses in the Apert syndrome group confirmed the presence of type -I and -III collagen and no proliferative activity of fibroblasts. The decorin staining was absent in almost all the specimens. We conclude that in Aperts syndrome gingival lateral swellings is a secondary outcome and is independent of a increase in the connective tissue components; the collagen fibers, and the glycosaminoglycans gathering found in the Apert syndrome patients were structurally different.
Antuniassi, Anelena Rocha. "Ocorrência e grau de severidade da mucosite bucal em relação ao fluxo salivar de pacientes sob quimioterapia." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/23/23139/tde-08042009-111549/.
Full textMucositis induced by chemotherapy and radiotherapy represents one of most undesirable side effects in the cancer treatment. The pain associated to mucositis raise difficulties to patients ability to chew and swallow and frequently causes temporary interruption of treatment and delay in patient recovery. It presents itself as redness and/or ulcerative sores in the soft tissues of the mouth, throat and gastrointestinal tract. The studied group was composed by 33 patients with colon cancer with ages between 28 and 66 years, 15 women and 18 men Ninety nine cycles of chemotherapy were analyzed. A combination of 5-fluorouracil, with folinic acid was used. Age, gender, salivary flow before and during treatment were associated to the occurrence of OMAS and WHO mucositis for patients with normal and reduced salivary flow. Size and sites of ulceration occurrence were also analyzed. The following results were found: the patients with reduction of salivary flow, before and during chemotherapy developed more OMAS and Who mucositis comparing to normal flow patients. Patients with reduced flow also had more ulceration and the mucosal surfaces of inferior lips and the lateral borders of tongue were the sites with more severe ulceration rates.