Tesis sobre el tema "Médicaments – Administration par voie topique"
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Coutable, Jocelyn. "Contribution à l'étude du passage percutané d'un inhibiteur calcique de la famille des phényl-dihydropyridines : développement et optimisation d'une forme topique". Paris 5, 1991. http://www.theses.fr/1991PA05P618.
Texto completoLyu, Zhenbin. "Fluorinated supramolecular dendrimer nanosystems for cancer treatment". Electronic Thesis or Diss., Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0404.
Texto completoCancer is one of the leading causes of death and remains a difficult disease to treat. The application of nanotechnology is widely expected to bring breakthrough and create novel therapeutics for early and precise diagnosis as well as safe and effective treatment in cancer therapy. Dendrimers are ideal systems for nanomedicine by virtue of their uniquely well-defined structure and multivalent cooperativity. In this PhD thesis, we have developed innovative self-assembling supramolecular dendrimer nanosystems carrying specific fluorinated entities for the delivery of drug, nucleic acid therapeutics and imaging agents. Some of the established fluorinated supramolecular dendrimer nanosystems showed particularly interesting properties for drug encapsulation, nucleic acid delivery and bioimaging with favorable biodistribution profile. In particular, the fluorinated entities also offer the unique opportunity for in vivo 19F magnetic resonance imaging (MRI). Collectively, our innovative fluorinated supramolecular dendrimer nanosystems constitute promising platforms for biomedical applications in cancer treatment
Hakem, Asma. "Les métabolites spécialisés du genre Juncus : approfondissement de leur potentiel antimicrobien et étude de leur biodisponibilité". Electronic Thesis or Diss., Université de Lille (2022-....), 2023. https://pepite-depot.univ-lille.fr/ToutIDP/EDSMRE/2023/2023ULILR040.pdf.
Texto completoTo address the current challenges raised by emerging diseases (COVID-19 pandemic) and antibiotic resistance, the search for new antimicrobials has become urgent. The present study aims to highlight the potential of plant species, selected according to ecological and chemotaxonomic criteria, as a natural source of compounds with a wide structural diversity and promising biological activities. Juncus species collected from 3 localities in France were investigated for their potential antimicrobial effect against coronaviruses and Gram-positive bacterial strains. For this purpose, the approach of bioguided fractionation was adopted through the use of conventional separation techniques (preparative HPLC and CPC). The antiviral study conducted against the coronavirus HCoV-229E highlighted the antiviral potential of luteolin, a flavone that was isolated from the EtOAc sub-extract of J. acutus stems (locality 2). The screening for antibacterial activity led to the selection of the CH2Cl2 sub-extract of J. inflexus rhizomes (locality 3) for the rest of this study as this enriched-phenanthrene derivative sub-extract demonstrated a remarkable activity in particular against S. aureus strains. Additional experiments to deepen the understanding of the antibacterial effect of some of the isolated phenanthrene derivatives were performed focusing on a methicillin-resistant S. aureus strain that was isolated from a diabetic foot infection. Regarding the promising results, the developement of a topical formulation involving juncusol as an active component was initiated. Bioavailibility studies were also performed on this phenanthrene derivative through in vitro absorption and intestinal permeability experiments across Caco2/HT29-MTX co-cultured cells
Ades, Emmanuelle. "Administration pernasale des médicaments à effet systémique". Paris 5, 1993. http://www.theses.fr/1993PA05P234.
Texto completoDenoyer, Laurence. "L'analgésie par voie transdermique". Paris 5, 1998. http://www.theses.fr/1998PA05P030.
Texto completoPrudat, Claire. "Comprimés bioadhésifs d'aminophylline obtenus par granulation par voie humide". Paris 5, 1994. http://www.theses.fr/1994PA05P137.
Texto completoNicoli, Sara. "Administration dermique et transdermique des médicaments : deux cas d'étude". Paris 11, 2002. http://www.theses.fr/2002PA114804.
Texto completoHuertas, Louis. "Etude des promoteurs d'absorption par voie percutanée". Paris 5, 1996. http://www.theses.fr/1996PA05P047.
Texto completoBlanchon, Sylvène. "Méthodologie d'étude pharmacotéchnique pour l'élaboration de systèmes transdermiques : application à la progestérone et à un progestatif de synthèse". Paris 11, 1991. http://www.theses.fr/1991PA114801.
Texto completoIllel, Brigitte. "Contribution à l'étude de la pénétration cutanée des particules : mise au point de deux méthodes d'étude quantitative des voies de pénétration transépidermiques et transfolliculaires". Paris 11, 1990. http://www.theses.fr/1990PA114804.
Texto completoAubin, Christel. "Dispositifs transdermiques : actualisation". Paris 5, 1998. http://www.theses.fr/1998PA05P109.
Texto completoCzuba, Elodie. "Développement de nouveaux systèmes nanoparticulaires pour l'administration de bio-médicaments par voie orale". Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAJ072/document.
Texto completoBiologics are administrated by parenteral route due to their degradation in the gastrointestinal tract. This administration mode leads to lowadherence, showed by the low adherence for chronic diseases treatment. In order to increase adherence by reducing pain and adverse effects associated with treatment we developed a double encapsulation system to protect and increase biologic absorption for a future oral administration. Our system consists in encapsulated biologics inside PLGA nanoparticles (NPs), themselves encapsulated inside a gastroresistant vehicle. The aim of this work was to improve the system efficiency with insulin by NPs charges modification and intestinal release reduction and to transfer the technology to another molecule: the heparin. Negative charges improved the intestinal nanoparticle crossing as shown by the insulinopenic rat model with a decrease of glycaemia. To stabilize the NPs system in intestinal medium, a hyaluronic acid coating was tested and validated in vitro. When transferred to another biologics, we showed similar NPs chacacteristics with heparin than with insulin, revealing the transposition of our technic
Callet, Adeline. "Administration orale d'insuline par double encapsulation : développement du système nanoparticulaire par coacervation complexe insuline/chitosane". Strasbourg, 2010. https://publication-theses.unistra.fr/public/theses_doctorat/2010/CALLET_Adeline_2010.pdf.
Texto completoDiabetes mellitus is a chronic disease which affects more than 3 millions people in France. Translated by a loss of glycaemia control, its current treated by daily insulin injections entailing discomfort of patients. Other administrations way have been developed and the oral route constitute the most physiological, comfortable and best accepted by patients. Nevertheless, physico-chemical constraints can lead to lose hypoglyceamiant activity of insulin. To avoid it, a pharmaceutical complex vector was developed by double encapsulation: a vehicle bringing a gastric protection and nanoparticles bringing an intestinal protection. By this way, encapsulated insulin in nanoparticles is protected from the intestinal environment and can then cross intestinal barrier to join the blood circulation to be released. These nanoparticles were obtained by complex coacervation with chitosan, a natural and biocompatible polymer. Nevertheless, its low solubility at physiological pH makes its complexation with insulin difficult. Two different water-soluble chitosan derivatives were formed: one obtained by chemical modifications, N-, O-carboxymethyl chitosan (NOCC) and one chitosan salt, chitosan chlorhydrate. A detailed characterization of these two water-soluble derivatives allows insulin complexation at physiological pH. A complexation study made for these two compounds allows the definition of a complexation area where nanoparticles were formed. They had shown average size from 300 to 500 nm, positive charge (+40 mV) and encapsulation efficiency of 85-90 %. In vitro studies allowed to show nanoparticles stability as well as intestinal resistance. Their biological properties were verified by in vivo experiments on diabetic rats, showing the conservation of insulin biological activity and ability to induce glycaemia decrease going to normoglycaemia in 8 hours. Nanoparticles obtained with two water-soluble chitosan derivatives, protect insulin (conservation of biological activity) from the intestinal environment and allow it to cross intestinal barrier. These results permit the validation of insulin encapsulation by complex coacervation concept. Hence nanoparticles can be included in the complex pharmaceutical vector to be administered by oral way
Trichard, Laury. "Billes à base de cyclodextrines et d'huile : étude du mécanisme de formation et évaluation du potentiel en formulation et en thérapeutique". Paris 11, 2007. http://www.theses.fr/2007PA114810.
Texto completoA new dispersed system, consisting in semi-solid “beads”, is produced from a mixture of natural cyclodextrins, water and oil (vegetable, mineral or silicone oils) employing a soft, simple and innovative process. Beads were characterised and their formation mechanism was investigated by various physicochemical techniques. Thus, we identified some of the key points involved in bead formation: formation of inclusion complexes between oil components and cyclodextrins, formation of an o/w emulsion and cyclodextrin crystallisation. We took then benefits from the high oil content of beads to encapsulate two lipophilic model drugs, i. E. Isotretinoin and adapalene. Encapsulation yields reached 90-100%. Finally, our in vitro and in vivo assays showed that beads are well tolerated and are able to release active ingredients as well by oral than topical route
Collaveri, Jean-Pierre. "Etude des timbres transdermiques : évaluation d'une formulation adaptée à un principe actif x". Paris 5, 1990. http://www.theses.fr/1990PA05P051.
Texto completoLacheteau, Gwendae͏̈l. "Comparaison de la charge hépatique en paracétamol chez le rat, après administration de 4 doses croissantes de propacétamol par voie intraveineuse et de paracétamol par voie orale". Paris 5, 1996. http://www.theses.fr/1996PA05P203.
Texto completoCzuba, Elodie. "Développement de nouveaux systèmes nanoparticulaires pour l'administration de bio-médicaments par voie orale". Electronic Thesis or Diss., Strasbourg, 2018. http://www.theses.fr/2018STRAJ072.
Texto completoBiologics are administrated by parenteral route due to their degradation in the gastrointestinal tract. This administration mode leads to lowadherence, showed by the low adherence for chronic diseases treatment. In order to increase adherence by reducing pain and adverse effects associated with treatment we developed a double encapsulation system to protect and increase biologic absorption for a future oral administration. Our system consists in encapsulated biologics inside PLGA nanoparticles (NPs), themselves encapsulated inside a gastroresistant vehicle. The aim of this work was to improve the system efficiency with insulin by NPs charges modification and intestinal release reduction and to transfer the technology to another molecule: the heparin. Negative charges improved the intestinal nanoparticle crossing as shown by the insulinopenic rat model with a decrease of glycaemia. To stabilize the NPs system in intestinal medium, a hyaluronic acid coating was tested and validated in vitro. When transferred to another biologics, we showed similar NPs chacacteristics with heparin than with insulin, revealing the transposition of our technic
Muschert, Susanne. "Polymeric coatings for solid dosage forms : characterization and optimization". Lille 2, 2008. http://www.theses.fr/2008LIL2S023.
Texto completoTedajo, Gilberte-Muriel. "Emulsions multiples de type H/L/H : des véhicules prometteurs pour l'administration d'antiseptiques par voie vaginale". Paris 11, 2002. http://www.theses.fr/2002PA114811.
Texto completoGreib, Nicolas. "Administration par voie péritonéale de médicaments au cours de la coeliochirurgie : intérêt de la nébulisation d'anesthésique local". Strasbourg, 2010. http://www.theses.fr/2010STRA6174.
Texto completoThe boom in laparoscopic surgery means that new anesthetic strategies must be found, especially with respect to post-operative analgesia. Topical administration of local anesthetics is part of multimodal analgesia and many studies seeking to establish its interest in laparoscopic surgery provide contradictory results. Our aim is to contribute to an optimum way of administrating local anesthetics topically, with a view to: 1)homogeneous spreading on the peritoneum, 2)simultaneous humidification of insufflation gas, in order to prevent hypothermia. Hypothermia is due to evaporation of the peritoneum’s surface by contact with dry insufflation gas. Humidification could prevent this thermal energy loss. We performed several in vitro and in vivo (animal-) studies. Firstly, we evaluated the efficiency of hot versus cold humidification in hypothermia prevention. Secondly, we evaluated several humidification devices in order to assess their efficiency in delivering ropivacaine in the insufflation gas flow. Finally, we performed a pharmacokinetic study of intraperitoneal ropivacaine nebulization, by comparison with standard instillation. Our results open new prospects for intraperitoneal topical administration of local anesthetics: in the animal setting, we showed that hot humidification of insufflated gas did not provide any benefit in hypothermia prevention, in comparison with cold humidification, we established the potential value of a nebulizer, able to humidify and deliver local anesthetics along with CO2 insufflation during laparoscopy, we performed the first pharmacokinetic study of intraperitoneal ropivacaine nebulization, validating the safety of the technique. These results enable us to follow our research with a clinical trial to evaluate the effects of nebulized ropivacaïne and humidified insufflation gas in laparoscopic surgery
Carvalho, Bouton Malua de. "Modélisation de l'absorption percutanée ex vivo de l'œstradiol". Lyon 1, 1995. http://www.theses.fr/1995LYO1T094.
Texto completoSchlotterbeck, Hervé. "Conditionnement du CO2 insufflé lors des cœlioscopies : Intérêt de l'humidification sans réchauffement". Université Louis Pasteur (Strasbourg) (1971-2008), 2008. http://www.theses.fr/2008STR13122.
Texto completoMachet, Laurent. "Utilisation des ultrasons pour augmenter l'absorption percutanée : la phonophorèse". Tours, 1997. http://www.theses.fr/1997TOUR3308.
Texto completoDeschênes, Mariline. "La prostaglandine E₁ par voie transdermique chez le nouveau-né atteint de cardiopathie congénitale". Master's thesis, Université Laval, 2008. http://hdl.handle.net/20.500.11794/19924.
Texto completoBounoure, Frédéric. "Formulation d'un médicament à base de métopimazine". Rouen, 2006. http://www.theses.fr/2006ROUENR06.
Texto completoMetopimazine is an antiemetic drug with many galenic forms which are not adapted to treat nauseas/ vomiting associated to a diarrhéa in thechildren. Two ways were followed in this study to admnistrate this drug : the cutaneous route and the nasal one. The study of percutaneous absoption was led on pig skin using Franz cell and showed a flow of 0,176 µg/h/cm². The absoption enhancers (ethanol, propylene glycol, isopropyl myristate) have a factor 32. Iontophoresis contitutes however a much better solution with percutaneous flow of 4. 72 µg/h/cm². The study of the nasal route was led in rabbit and demonstrated an important absoption of metopimazine with a bioavailabilitu of 50%. Cyclodextrin was tested lihke an absorption enhancer and its addition increased the maximum plasmatic concentration of metopimazine. In conclusion, the nasal route is most interesting with an important absorption allowed a therapeutic use and a quick effect
Clemessy, Martine. "Étude d'un système de diffusion transdermique par iontophorèse". Paris 11, 1992. http://www.theses.fr/1992PA114833.
Texto completoMartinet, Frédéric. "Qualification d'un appareil pour essai de dissolution des formes orales solides". Paris 5, 1999. http://www.theses.fr/1999PA05P023.
Texto completoHoarau, Didier. "Etude de la potentialité d'héparines hydrophobisées pour la microencapsulation moléculaire et la promotion de l'absorbtion intestinale de principes actifs récalcitrants". Montpellier 1, 2003. http://www.theses.fr/2003MON13517.
Texto completoBoutot, Fabienne. "Lyophilisats oraux dans la thérapeutique moderne". Bordeaux 2, 2000. http://www.theses.fr/2000BOR2P012.
Texto completoBouchon, Martine. "Influence des promoteurs sur l'absorption rectale du chlorhydrate de clomipramine". Paris 5, 1990. http://www.theses.fr/1990PA05P034.
Texto completoSalmon, Daniel. "Mise au point d'un modèle d'administration nasale "in vivo" chez le rat". Paris 5, 1993. http://www.theses.fr/1993PA05P252.
Texto completoDi, Battista Marie. "Optimisation d'une formulation par compression directe : application à deux formules de comprimés effervescents destinés à la voie orale". Bordeaux 2, 2000. http://www.theses.fr/2000BOR2P073.
Texto completoHurault, de Ligny Bruno. "Contribution à l'étude pharmacocinetique du kétroprofène intraveineux : applications thérapeutiques dans la colique néphrétique". Rouen, 1987. http://www.theses.fr/1987ROUE02NR.
Texto completoPichon, Françoise. "Systèmes transdermiques thérapeutiques et anti-inflammatoires non stéroi͏̈diens par voie percutanée". Paris 5, 1993. http://www.theses.fr/1993PA05P052.
Texto completoDiop, Mouhamadou. "Formulation, développement et validation de systèmes particulaires d'insuline en vue de leur administration par voie orale". Electronic Thesis or Diss., Strasbourg, 2015. http://www.theses.fr/2015STRAJ081.
Texto completoInsulinotherapy helps diabetics to regulate their glycaemia. This thesis is part of the ORAIL Bis project which aims to develop an oral insulin delivery system based on the double encapsulation of insulin. The developed vector is composed of a capsule containing insulin loaded particles (NPs) formulated with chitosan (CS) by complex coacervation or poly (lactic-co-glycolic) acid (PLGA) by double emulsion solvent evaporation. The objectives of the thesis are to stabilize chitosan NPs by crosslinking and freeze-drying, increase the bioavailability of NPs PLGA by mucoadhesion and transpose them to the industrial scale. Results showed that the combination of both strategies reduces the size of CS NPs, maintain a positive charge, give them stability and bioefficacy. Mucoadhesion failed to increase the bioavailability of PLGA NPs. A negative charge allows to improve their biological efficacy and are transposed to industrial scale. The encapsulation of these NPs in an alginate capsule allowed to validate in vivo the concept of double encapsulation of insulin
Yang, QiaoWen. "Systèmes polymériques à base de dispersion aqueuse administrés par voie orale pour la libération contrôlée du principe actif". Lille 2, 2009. http://www.theses.fr/2009LIL2S045.
Texto completoYang, Qiaowen. "SYSTEMES POLYMERIQUES A BASE DE DISPERSION AQUEUSE ADMINISTRES PAR VOIE ORALE POUR LA LIBERATION CONTROLEE DU PRINCIPE ACTIF". Phd thesis, Université du Droit et de la Santé - Lille II, 2009. http://tel.archives-ouvertes.fr/tel-00451556.
Texto completoBeesh, Mustafa. "Mise au point de nouvelles formulations pharmaceutiques orales à délivrance ciblée de principes actifs au niveau du côlon". Strasbourg, 2010. https://publication-theses.unistra.fr/public/theses_doctorat/2010/BEESH_Mustafa_2010.pdf.
Texto completoThe work described in this manuscript deals with the synthesis, the enzymatic degradation and the physicalchemistry characterization of new excipients based on a natural polysaccharide, dextran. These excipients can serve coating or agent matrix for the realization of oral pharmaceutical forms at colon-specifie release of the active ingredients. To this end, two main strategies for syntheses were performed on dextran to make it hydrophobie. The first is based on the esterification of hydroxyl groups of dextran to prepare three families of dextran esters (acetate, propionate and butyrate) with three Degree of substitution (1 , 2 and 3). The second strategy allows to obtain three types of dextran block copolymers (di, tri and tetra-block copolymers) by freeradical emulsion polymerization of one or more acrylic monomers (MA, MMA and MAA) on the block of dextrans. The beneficial results of in vitro release of theophyllin from tablets coated individually with different types of dextran block copolymers were allowed to determine the potential uses of dextran block copolymers to deliver oral dosage forms in the colon
Rona, Nathalie. "Production d'ampoules injectables : validation d'un filtre stérilisant". Paris 5, 1999. http://www.theses.fr/1999PA05P177.
Texto completoSoury, Delphine. "Conception et caractérisation d’un dispositif original pour l’administration cutanée : applications diagnostique et thérapeutique". Paris 11, 2006. http://www.theses.fr/2006PA114805.
Texto completoDBV Technologies has developed an original device for cutaneous administration of molecules: the Epatch® system. The active substance is adsorbed on to the device as a powder by electrostatic forces. The occlusion provided by the device allows water condensation under the patch and the subsequent dissolution. An E-patch® composed of particles of cow’s milk powder has been developed to diagnose cow’s milk proteins allergy. The concentration of proteins in the vicinity of cutaneous immune cells and the absence of systemic delivery of intact proteins indicate the efficacy and safety of the test. The origin of the inflammatory reaction observed under a positive patchtest has been studied with mice sensitized to cow’s milk and implicates both immediate and delayed allergic mechanisms. The therapeutic potential of the E-patch® has been evaluated with fentanyl. A systemic passage of this molecule provoked has been demonstrated
Lagarce, Frédéric. "Développement d'une forme à libération prolongée destinée aux traitements chroniques par voie intrathécale : application aux microsphères de baclofène en vue du traitement des spasticités sévères". Angers, 2004. http://www.theses.fr/2004ANGE0503.
Texto completoChronic administration of neuro-active substances to spinal structures, can nowadays only be performed with implanted pumps connected to indwelling catheters. This technique has some drawbacks which could be avoided by implanting a sustained release dosage form which could control the delivery of the drug during a few months. Following an overview on the explored ways to enhance the residence time of drugs after spinal delivery, we describe the preparation of biodegradable baclofen-loaded-microspheres displaying features which could permit their industrial development. Specific in vitro quality controls have been performed on the microparticle batches. The duration of microsphere pharmacologic action has then been investigated in a model (New-Zealand rabbit) of baclofen activity developed for this purpose. The follow-up of baclofen release in vivo has been performed in Saanen goats after the implementation of a relevant pharmacokinetic model. Tolerance and toxicity of these new microparticles have been evaluated ex vivo (cellular culture) and in vivo during four months. A system allowing a reduction of the burst effect was also studied. Different solutions have been evaluated in vitro and in vivo. This works makes the proof of concept of chronic spinal drug delivery with microparticulate implants. However, a few remaining issues such as a residual burst effect and a significative tissular reaction after 4 months remain to be solved
Semetey, Vincent. "Vers la préparation de vaccins synthétiques administrables par voie nasale : Oligomères d'urées N,N'-liées:synthèse,étude conformationnelle et propriétés d'auto assemblage". Université Louis Pasteur (Strasbourg) (1971-2008), 2002. http://www.theses.fr/2002STR13238.
Texto completoThe search for new nonnatural oligomers ("foldamers") designed to reproduce or mimic the secondary structure of peptide (helix, sheet, turn) have gained considerable interest with potential application in pharmaceutical research. Work published by the groups of Seebach, Gellman and Hanessian has revealed that short peptides made exclusively with enantiopure or -amino acids, correctly substituted, could form in solution and in the solid state, stable helical or pleated-sheet-type structures. This memory of thesis is devoted to the synthesis and the conformational study of linear and cyclic N,N'-linked urea oligomers. The linear N,N'-linked urea oligomers have a strong analogy with peptides. However, their conformational preference as their folding propencity were not yet studied. A simple and effective method was developed to obtain succinimidyl carbamates derivatives starting from -amino acids. These carbamates are stable and crystalline compounds that react spontaneously with amines at ambient temperature to afford corresponding ureas. These precursors were used for the synthesis of linear N,N'-linked urea oligomers using solid phase methodology. The conformational study in solution of this family of oligomers performed by NMR in pyridin-d5 as well as by circular dichroism shows that these oligomeric molecules adopt a helicoidal secondary structure. On the basis of this structure, urea oligomers presenting an antibacterial activity were designed and synthesized. The succinimidyl carbamate derivatives were also used for the synthesis of cyclic N,N'-linked urea oligomers in solution. The assembly properties of these compounds were analysed in the solid state. The X-ray cristallography studies of the tetramer reveal the formation of strongly polarized tubular structures
Diop, Mouhamadou. "Formulation, développement et validation de systèmes particulaires d'insuline en vue de leur administration par voie orale". Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAJ081/document.
Texto completoInsulinotherapy helps diabetics to regulate their glycaemia. This thesis is part of the ORAIL Bis project which aims to develop an oral insulin delivery system based on the double encapsulation of insulin. The developed vector is composed of a capsule containing insulin loaded particles (NPs) formulated with chitosan (CS) by complex coacervation or poly (lactic-co-glycolic) acid (PLGA) by double emulsion solvent evaporation. The objectives of the thesis are to stabilize chitosan NPs by crosslinking and freeze-drying, increase the bioavailability of NPs PLGA by mucoadhesion and transpose them to the industrial scale. Results showed that the combination of both strategies reduces the size of CS NPs, maintain a positive charge, give them stability and bioefficacy. Mucoadhesion failed to increase the bioavailability of PLGA NPs. A negative charge allows to improve their biological efficacy and are transposed to industrial scale. The encapsulation of these NPs in an alginate capsule allowed to validate in vivo the concept of double encapsulation of insulin
Mingasson, Cécile. "Développement d'un comprimé mucoadhésif pour la voie buccale". Bordeaux 2, 1994. http://www.theses.fr/1994BOR2P078.
Texto completoHebrard, Géraldine. "Formulation et caractérisation de vecteurs de polymères naturels pour l'administration orale de microorganismes et de principes actifs". Clermont-Ferrand 1, 2008. http://www.theses.fr/2008CLF1PP02.
Texto completoWhey proteins are relevant candidate to develop multiparticular oral delivery system of bioactive compound because beside their high nutritional value, these proteins have a capability to gel with divalent cation in cold condition without any organic solvent or toxic cross-linking agent contribution. The goal of this work was to develop oral formulation made of whey proteins and able to delay the release of alive microorganisms and/or drugs in the gastrointestinal tract. First at all, pure whey proteins microparticles entrapping genetically modified yeast were produced by a cold/gelation method. This dosage form exhibited a resistance in simulated gastric fluid and led to a significantly increase of encapsulated yeast heterologous activity in comparison to free yeasts. Then, the microparticles manufacturing process was optimized in order to be industrially scalable. To use the Encapsulator, whey proteins had to be blend with another biopolymer with the same gelation property, alginate. Protocols to produce coated and uncoated mixed microparticles, whey proteins/alginate, were established. Probiotic yeasts and a model drug, theophylline, were encapsulated in these coated and uncoated microparticles and their in vitro behavior were study. Coated and uncoated mixed microparticles exhibited gastroresistance properties and controlled yeast and drug release in simulated intestine medium. Moreover, encapsulation of probiotic yeasts in mixed whey proteins/alginate microparticles significantly increased the yeast survival in simulated gastric fluid with a better performance for coated mixed microparticles. To conclude, an innovative dosage was developed with only natural products : whey proteins blended with alginate. The oral delivery dosage form developed here, easily scalable, has shown good potentiality to release alive microorganisms or drug such as theophylline
Croizet, Frédéric. "Mise en forme et développement analytique du sirop M1371". Bordeaux 2, 1998. http://www.theses.fr/1998BOR2P089.
Texto completoDufaÿ, Amélie. "Conception et évaluation d'un vecteur ciblé de thérapie génique anticancéreuse destiné à la voie intraveineuse". Thesis, Paris 11, 2012. http://www.theses.fr/2012PA114818/document.
Texto completoIntravenous administration of therapeutic DNA faces many obstacles related to its degradability and its difficulty to penetrate into the cells due to its large size and its hydrophilicity. Lipoplexes conjugated with high molecular weight hyaluronic acid (HA) have been designed in order to deliver plasmid DNA inside cancer cells expressing the membrane receptor CD44, a key receptor in the development of tumors. The use of HA conjugated to the phospholipid DOPE (HA-DOPE) and of the GFP model plasmid lead to obtain lipoplexes around 250 nm, negatively charged, which efficiently protect the DNA against nucleases and slightly stimulate the C3 fraction of the complement system. In a cellular model expressing CD44, the optimal transfection was obtained by using lipids containing 10% of HA-DOPE complexed to DNA at a 2:1 ratio. Internalization of these lipoplexes is mediated by the caveolae pathway and involves the CD44 receptor. This formulation was applied to the delivery of a therapeutic gene encoding the estrogen receptor β (ERβ), which is a potential tumor suppressor. On an in vivo xenograft model of estrogen-dependent breast cancer cells expressing CD44, decrease of the tumor volume, as well as decrease of the Ki67 proliferation index, have shown the anticancer activity of the lipoplexes conjugated to HA following intravenous administration
Gellis, Christophe. "Optimisation de la corticothérapie pédiatrique par voie nutritionnelle parentérale : étude de stabilité de l'hémisuccinate de méthylprednisolone in vitro et études pharmacocinétiques in vivo". Clermont-Ferrand 1, 2006. http://www.theses.fr/2006CLF1PP03.
Texto completoStability and compatibility of hemisuccinate methylprednisolone with concentrations 25 to 125 µg/ml in two in one and all in one paediatric parenteral nutritive mixtures were established for a 7 days duration at the temperature of 4°C followed by 24 hours in ambient temperature. The study of pharmacokinetic parameters of hemisuccinate methylprednisolone and methylprednisolone, after administration in intravenous bolus of SOLUMEDROL® in 2 ml of various vehicles (nutritive mixtures or sodium chloride 0,9%) in New-Zealand rabbit, showed an influence of the mixtures containing a lipid emulsion. In presence of lipids the clearances of the two molecules and the volume distribution of ester of methylprednisolone are significantly reduced. During administration of SOLUMEDROL® by continuous perusion in the same nutritive mixtures for 24 hours in the animal, no signifiant difference of the pharmacokinetic parameters of methylprednisolone is highlighted. These data established the pharmacokinetic bases of an administration of SOLUMEDROL® to the child by continuous nutritive perfusion
Watelet, Laurent. "La Muadhésion : principes fondamentaux, développement de formes pharmaceutiques bioadhésives". Bordeaux 2, 1995. http://www.theses.fr/1995BOR20002.
Texto completoGlówka, Eliza. "Encapsulation des sondes fluorogéniques et de molécules pharmacologiquement actives dans des nanoparticules pour augmenter la capture cellulaire". Thesis, Nancy 1, 2009. http://www.theses.fr/2009NAN10065/document.
Texto completoPolymeric nanoparticles have been considered to have the potential to improve drug delivery to the desired site of action and to enable delivery of poorly soluble, poorly absorbed or unstable drugs. In this work, two types of active substances have been chosen for encapsulation in polymeric nanoparticles: fluorogenic probes for intracellular targeting of the reduced glutathione (GSH), namely ortho-phthaldialdehyde (OPA) and naphthalene-2,3-dicarboxaldehyde (NDA), as well as salmon calcitonin (sCT) which is a polypeptide hormone. The probe or sCT-loaded nanoparticles were obtained using a simple or double emulsion solvent evaporation method, respectively. The obtained nanoparticles were thoroughly characterized, e.g. in terms of the size, zeta potential, encapsulation efficiency, drug (probe) release, cytotoxicity or microscopic morphology and thermal properties. NDA-loaded nanoparticles were incubated with yeast cells and intracellular NDA-GSH adduct levels increased by about 9-times in comparison with the free probe. In the case of sCT, the in vivo study was conducted in rats, and it was demonstrated that after subcutaneous injection of sCT-loaded nanoparticles, elevated serum sCT levels could be sustained for 3 days. In conclusion, the active molecules incorporated in polymeric nanoparticles achieved the better cellular uptake (NDA) and bioavailability (sCT) that the non encapsulated ones