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Academic literature on the topic 'EMATOPOIETICO'
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Journal articles on the topic "EMATOPOIETICO"
PARETI, GERMANA. "GIULIO BIZZOZERO E LA FUNZIONE EMATOPOIETICA DEL MIDOLLO OSSEO." Nuncius 11, no. 2 (1996): 563–80. http://dx.doi.org/10.1163/182539196x00051.
Full textPARETI, GERMANA. "GIULIO BIZZOZERO E LA FUNZIONE EMATOPOIETICA DEL MIDOLLO OSSEO." Nuncius 11, no. 2 (January 1, 1996): 563–80. http://dx.doi.org/10.1163/221058796x00055.
Full textMaličev, Elvira, and Metka Krašna. "Opredelitev krvotvornih matičnih in predniških celic v pripravkih za presaditev." Slovenian Medical Journal 87, no. 1-2 (March 2, 2018). http://dx.doi.org/10.6016/zdravvestn.1602.
Full textDissertations / Theses on the topic "EMATOPOIETICO"
JACOB, AURELIEN MARC FLORENT. "IMPROVING TARGETED GENE EDITING IN HEMATOPOIETIC STEM CELLS FOR CLINICAL TRANSLATION." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2021. http://hdl.handle.net/10281/304800.
Full textThe scope of genome engineering in hematopoietic stem/progenitor cells (HSPCs) has broadened from random to precise genome insertions for treating genetic diseases of the blood lineages. Targeted editing of inherited mutant genes allows in situ correction and functional reconstitution with preserved expression control. We recently showed that both the induced double-strand DNA breaks and the AAV6 genome trigger a p53-dependent DNA damage response in HSPC delaying proliferation and decreasing hematopoietic reconstitution after xenotransplantation. Suppression of this response by transient expression of a dominant negative p53 released cell-cycle block and rescued hematopoietic reconstitution. Yet, the underlying biology remained unknown as well as the impact of gene editing on clonal dynamics of HDR-edited HSPC upon transplantation. Moreover, it has long been contended that the quiescence of primitive HSC constrains HDR-mediated gene editing, thus limiting its perspective clinical applications in several diseases. Here, we first overcame such constraints by transiently expressing the adenovirus 5 protein E4orf6/7, which operates the major cell cycle controller E2F, together with the nuclease. By global and targeted gene expression analysis we showed engagement of targeted cells in S/G2 phases with concomitant upregulation of all major components of the HDR machinery, thus increasing the efficiency of targeted transgene insertion. Combined E4orf6/7 expression and p53 inhibition enhanced >50% HDR efficiency within human graft surpassing the levels reported until now in the literature. Such outcome was reproducible across several HSPC donors and sources, genomic loci and conceivably portable to most types of editing platforms. In parallel, we devised a novel technology (BAR-seq) which enables clonal tracking of individual HDR-edited HSC by introducing a unique heritable barcode in the AAV6 template. Deep sequencing of integrated BARs in human hematochimeric mice showed that only few (5-10) dominant clones of edited HSC robustly contributed to the hematopoietic graft long-term after transplant. Transient p53 inhibition during editing enabled substantial increase in polyclonal graft composition without altering individual HSC output, thus explaining the improved engraftment and highlighting the p53-mediated response as culprit of an otherwise oligoclonal hematopoiesis. Importantly, BAR-seq provided the first direct evidence that human HDR-edited HSC maintain multilineage potential and undergo multiple rounds of symmetric and asymmetric divisions in primary and secondary xenogeneic hosts. Altogether, we expect that the substantial gains obtained in HDR efficiency and polyclonal repopulation by our improved editing protocol should broaden applicability of HSC gene editing and pave its way to clinical translation.
Bregoli, Lisa <1974>. "Citotossicità di sette nanoparticelle in progenitori ematopoietici isolati da midollo osseo umano." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2254/1/BREGOLI_LISA_TESI.pdf.
Full textBregoli, Lisa <1974>. "Citotossicità di sette nanoparticelle in progenitori ematopoietici isolati da midollo osseo umano." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2254/.
Full textMorini, Silvia <1986>. "Studio dell'interazione di HIV-1 sulle cellule progenitrici ematopoietiche CD34+ (HPCs)." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6212/1/Morini_Silvia_tesi.pdf.
Full textBeside the CD4 T cells progressive loss, HIV-infected subjects exhibit some peripheral cytopenias. In particular, anemia is found in 10% of asymptomatic and in 92% of AIDS patients and cART therapy is not able to solve this problem. The pathogenic mechanisms underlying this cytopenia are related to cytokine dysregulation, damage of HPCs, impairment of stromal cells and inhibition of the differentiation of HPCs. The CD34+ hematopoietic progenitor cells were separated from cord blood, differentiated towards the erythroid lineage and treated with active HIV-1, heat-inactivated virus and gp120. First of all we demonstrate that HPCs are not susceptible to infection and the gp120-CD4/CXCR4 binding cause a TGF-β1 mediated apoptosis. The innovative aspect of this study, however, is evident examining the effect of gp120 during differentiation towards the erythrocyte. Two experimental protocols are used: in the first cells are initially treated for 24 hours with gp120 ( HIV-1 or with heat-inactivated ) and then induced into differentiation, in the second cells are firstly differentiated and then treated with gp120. The negative "priming" induces a gp120-mediated apoptosis 48 hours after treatment and a differentiation reduction. If these cells are instead primarily differentiated for 24 hours and then treated with gp120, in the first 5 days after treatment, there is an increase of proliferation and differentiation, which is followed by a very marked apoptosis (also TGF-β1 mediated and due to gp120-CD4/CXCR4 binding) and a drastic reduction of differentiation. These results allowed us to define the complexity of the genesis of anemia in these patients and suggest new therapeutic targets for these subjects already receiving cART .
Morini, Silvia <1986>. "Studio dell'interazione di HIV-1 sulle cellule progenitrici ematopoietiche CD34+ (HPCs)." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6212/.
Full textBeside the CD4 T cells progressive loss, HIV-infected subjects exhibit some peripheral cytopenias. In particular, anemia is found in 10% of asymptomatic and in 92% of AIDS patients and cART therapy is not able to solve this problem. The pathogenic mechanisms underlying this cytopenia are related to cytokine dysregulation, damage of HPCs, impairment of stromal cells and inhibition of the differentiation of HPCs. The CD34+ hematopoietic progenitor cells were separated from cord blood, differentiated towards the erythroid lineage and treated with active HIV-1, heat-inactivated virus and gp120. First of all we demonstrate that HPCs are not susceptible to infection and the gp120-CD4/CXCR4 binding cause a TGF-β1 mediated apoptosis. The innovative aspect of this study, however, is evident examining the effect of gp120 during differentiation towards the erythrocyte. Two experimental protocols are used: in the first cells are initially treated for 24 hours with gp120 ( HIV-1 or with heat-inactivated ) and then induced into differentiation, in the second cells are firstly differentiated and then treated with gp120. The negative "priming" induces a gp120-mediated apoptosis 48 hours after treatment and a differentiation reduction. If these cells are instead primarily differentiated for 24 hours and then treated with gp120, in the first 5 days after treatment, there is an increase of proliferation and differentiation, which is followed by a very marked apoptosis (also TGF-β1 mediated and due to gp120-CD4/CXCR4 binding) and a drastic reduction of differentiation. These results allowed us to define the complexity of the genesis of anemia in these patients and suggest new therapeutic targets for these subjects already receiving cART .
LUCHETTI, LUISELLA. "Studio e caratterizzazione delle cellule staminali ematopoietiche CD34+ isolate da sangue di cordone ombelicale." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2006. http://hdl.handle.net/2108/248.
Full textEx-vivo expansion of cord blood, a source of hematopoietic stem cells, has been suggested as a strategy for both transplantation and gene therapy application. Umbelical cord blood (UCB) from related and unrelated donors has emerged as novel source of stem cell for patients requiring allogenic transplantation. Although UCB contains hematopoietic progenitor cells at a higher frequency and with a higher proliferative capacity than adult-derived bone marrow, the low number of total hematopoietic stem cell contained in one UCB graft limits the potential for rapid hematologiacl recovery in adult patients. Allogeneic transplantation with umbelical cord blood is limited in adult recipients by a low CD34+ cell dose. The natural ligand for CD4 receptor is IL-16, characterized as an immunomodulatory cytokine that contributes to the regulatory process of CD4+ cell recruitment and activation at site of inflammation. Although it is known that CD34+ hematopoietic progenitors express CD4 on their surface, the functional role of IL-16 on these cells is still poorly defined. The objective of this study was to investigate the role of interleukin IL-16 for the ex-vivo expansion of cord blood cells. The results suggest a new role of IL-16 in the induction of the CD34+ hematopoietic cells from cord blood to ex-vivo expansion. After 7-14 days of ex-vivo expansion by adding IL-16 to the basal cocktail (a combination of early acting cytokines together), the total cells population, the CFC, the LTC increase more as compare to the basal cocktail alone.Importantly, early CD34+ progenitors from cultures expandend with IL-16 demostrated higher cytoplasmic expression of the cell-cycle inhibitor, p21cip1/waf1, and the antiapoptotic protein BCL-2, compared with UCB expanded in cytokines alone, suggesting improved maintenance of stem cell function in the presence of IL-16. Taken together, these results strongly suggest that the addition of IL-16 provides improved conditions for expansion of early UCB CD34+ and may serve to inhibit their differentation and rates of apoptosis during short-term in vitro expression.
VALERI, ERIKA. "Studio dei meccanismi di immunità innata che ostacolano la manipolazione genetica delle cellule ematopoietiche staminali." Doctoral thesis, Università Vita-Salute San Raffaele, 2023. https://hdl.handle.net/20.500.11768/137023.
Full textThe work described in this thesis focuses on the study of vector-host interactions in the context of human hematopoietic stem cell gene therapy. We study the innate immune sensing mechanisms of viral vectors and the role of host antiviral restriction factors in the poor permissivity of hematopoietic stem cells to viral transduction.
Sinatora, F. "Implicazioni psicoaffettive del trapianto di cellule staminali ematopoietiche in età pediatrica. Uno studio quantitativo-qualitativo." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3422896.
Full textPremesse. Numerosi studi hanno mostrato come i pazienti sottoposti a HSCT in età pediatrica possano manifestare alcune problematicità su diversi ambiti, come quello psicologico e sociale oltre che su quello medico (Khera et al., 2012; Syrjala et al., 2012). Pochi studi si sono concentrati sull’analisi simultanea di dati quantitativi con dati qualitativi (Bingen et al., 2012). Lo scopo di questo studio è quello di analizzare la percezione dell’esperienza di malattia sia nei pazienti, o survivor, che nei loro familiari. Altro scopo è quello di correlare dati di natura qualitativa con dati di natura quantitativa. Metodo. Abbiamo chiesto a tre popolazioni differenti di soggetti di rispondere ad una singola domanda aperta con una breve composizione scritta rispetto alla loro esperienza di malattia. Per il primo gruppo (Gruppo A), che ha compreso pazienti pediatrici, genitori e fratelli tale scritto è stato raccolto prima del trapianto e ad un anno da questo. In maniera medesima sono state indagate eventuali problematiche psicologiche nei pazienti e nei loro fratelli mediante il questionario Child Behavior Checklist 6-18 (CBCL) (Achenbach and Rescorla, 2001) e la QdV per i genitori attraverso il 36-Item Short Form Health Survey (SF-36). Il secondo gruppo (Gruppo B) invece ha compreso ex-pazienti pediatrici e i loro familiari testati a cinque anni dal trapianto. È stato utilizzato il questionario CBCL per l’individuazione di problematiche psicologiche negli ex-pazienti. Il terzo gruppo (Gruppo B-over) ha compreso soggetti adulti sottoposti a HSCT in età pediatrica, ad almeno 5 anni distanza dal trapianto, per questo gruppo è stata valutata anche la QdV mediante il questionario SF-36. Dati socio-demografici e sanitari sono stati raccolti. Per le analisi qualitativa dei testi è stato utilizzato il software T-LAB (Ver. 8.1.4; Lancia, 2012), che permette anche la valutazione congiunta di dati quantitativi raccolti mediante i test psicometrici e i dati qualitativi ottenuti attraverso le composizioni scritte. Risultati. Per il gruppo A sono stati raccolti 47 testi in T0 e 27 testi in T1. Punteggi anomali nelle scale indagate della CBCL (Problemi Internalizzanti, Problemi Esternalizzanti) e del SF-36 (Salute mentale) indicano in maniera ricorrente alcuni nuclei semantici. Nell’attesa del trapianto sono frequenti lemmi come ALTRI_BAM_MALATI, ALTRI_GENITORI, INCERTEZZA, DISPERAZIONE, MD_OGGETTI, HSCT E CON_INSIEME. Ad un anno di distanza invece i lemmi che facilmente ricorrono sono ANSIA_ANGOSCIA, ABITUARE, DIO, FORTUNA, MOLTO_TANTO e MORTE L’assenza di punteggi anomali nelle scale indagate invece si correlano a temi semantici differenti come ATTESA, NON_VEDERE, PERCHE_MOT, RIUSCIRE, REAGIRE, AFFRONTARE, UNITI. Ad un anno di distanza invece vi sono lemmi come AIUTO_AIUTARE, FORZA, MAMMA, PAPA, MET_GUERRA, SERENITA. Per il gruppo B sono stati ottenuti 98 scritti. I punteggi anomali delle scale indagate mediante la CBCL (Problemi Internalizzanti, Problemi Esternalizzanti, Problemi Totali) indicano una ricorrenza con temi semantici come FRATELLO_SORELLA, FILGIO_A, FIGLIO_SAN, MAMMA, BATTAGLIA. Punteggi migliori invece correlano maggiormente con temi come DESCRIVERE, PENSARE, PSICHICO_MENTALE, MORTE. Per il gruppo B-over invece sono stati ottenuti 18 brevi scritti. Possiamo rilevare delle differenze tra i generi per cui i maschi si concentrano maggiormente su lemmi come CORPO, CHEMIO_RADIO, OPERAZIONE_MD, CURE_MEDICHE, ESAMI_MD; mentre le femmine su temi semantici come MAMMA, PERSONE, DONATORE, FRATELLO_SORELLA, PADRE, PSICOLOGI, MD. I punteggi anomali indagati mediante il questionario SF-36 (Salute Generale) sono correlati con il gruppo di soggetti sottoposti ad autotrapianto e lemmi come CORPO, CHEMIO_RADIO, OPERAZIONE_MD, MOLTO_TROPPO. Punteggi migliori invece sono legati a parole chiave come MADRE, PADRE, PERSONE, DONATORE, SOSTENERE e con il trapianto allogenico da banca. Conclusioni. Per il primo gruppo emergono differenze significative rispetto alle narrazioni tra i vari membri del gruppo famiglia anche rispetto alle scale dei questionari utilizzati. Tali differenze oltre ad essere presenti rispetto ai due tempi della ricerca indicano come l’unità o la segregazione familiare abbia un’importante impatto sul proprio stato di salute mentale e dei propri figli, così come l’atteggiamento di accettazione e di come viene affrontata la malattia. La segregazione familiare compare come nucleo semantico fondamentale anche nel secondo gruppo per i punteggi anomali rispetto alle scale da noi indagate, come anche tutte le espressioni riferite alla malattia come lotta, battaglia e guerra. Nel terzo gruppo emergono differenze significative rispetto al genere come al tipo di trapianto effettuato. In generale possiamo ritenere che l’approccio di cura debba avere una particolare attenzione su come la malattia agisca sul vincolo familiare di tutti i suoi componenti.
Tagliavini, Francesca <1984>. "Studio di espressione e funzione della PLCβ1 nucleare in modelli murini ed umani di cellule ematopoietiche mieloidi e linfoidi." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4261/1/Tagliavini__Francesca_tesi.pdf.
Full textTagliavini, Francesca <1984>. "Studio di espressione e funzione della PLCβ1 nucleare in modelli murini ed umani di cellule ematopoietiche mieloidi e linfoidi." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4261/.
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