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Academic literature on the topic 'Phosphoantigènes'
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Dissertations / Theses on the topic "Phosphoantigènes"
Espinosa, Éric. "Activation et mode d'activation des lymphocytes T(gamma )9(delta)2 humains par les phosphoantigènes." Toulouse 3, 2002. http://www.theses.fr/2002TOU30212.
Full textBoëdec, Angélique. "Synthèse et évaluation biologique d'analogues du phosphoantigène (E)-1-hydroxy-2-méthylbut-2-ényl diphosphate modulant l’activité des lymphocytes T Vγ9Vδ2." Thesis, Aix-Marseille 2, 2011. http://www.theses.fr/2011AIX22080.
Full textVγ9Vδ2 T lymphocytes have been studied since the early eighties for their potent anti-infectious properties, attested both in vitro and in animal models and supported by many clinical observations. The involvement of Vγ9Vδ2 T cells in anti-infectious immunity lies in their recognition of an original family of molecules produced by intracellular pathogens so-called phosphoantigens and whose most potent natural activator to date is the HDMAPP: (E)-1-hydroxy-2-methylbut -2-enyl diphosphate.Having defined and synthesized a key intermediate on which we have linked pyrophosphonate and pyrophosphoramidate moieties, we have made bioisosters of the molecule HDMAPP. We also synthesized geometric isomers, analogue of position and cis isomers, carbonyl derivatives, acid and ester. The bioactivity of these molecules was tested in vitro and for the most active in vivo. The results indicate that the use of bioisosters compounds of HDMAPP may represent promising new leads for immunotherapy
Boëdec, Angélique. "Synthèse et évaluation biologique d'analogues du phosphoantigène (E)-1-hydroxy-2-méthylbut-2-ényl diphosphate modulant l’activité des lymphocytes T Vγ9Vδ2." Electronic Thesis or Diss., Aix-Marseille 2, 2011. http://www.theses.fr/2011AIX22080.
Full textVγ9Vδ2 T lymphocytes have been studied since the early eighties for their potent anti-infectious properties, attested both in vitro and in animal models and supported by many clinical observations. The involvement of Vγ9Vδ2 T cells in anti-infectious immunity lies in their recognition of an original family of molecules produced by intracellular pathogens so-called phosphoantigens and whose most potent natural activator to date is the HDMAPP: (E)-1-hydroxy-2-methylbut -2-enyl diphosphate.Having defined and synthesized a key intermediate on which we have linked pyrophosphonate and pyrophosphoramidate moieties, we have made bioisosters of the molecule HDMAPP. We also synthesized geometric isomers, analogue of position and cis isomers, carbonyl derivatives, acid and ester. The bioactivity of these molecules was tested in vitro and for the most active in vivo. The results indicate that the use of bioisosters compounds of HDMAPP may represent promising new leads for immunotherapy
Capietto, Aude-Hélène. "Immunothérapie anti-cancéreuse et lymphocytes T-Vgamma9Vdelta2 : stratégies contre l'échappement tumoral." Toulouse 3, 2010. http://thesesups.ups-tlse.fr/996/.
Full textPhosphoantigen-stimulated human TCR-Vgamma9Vdelta2 gamma eltaT lymphocytes exert a potent antitumor cytolysis. Their activity is currently assessed in several clinical trials of cancer immunotherapies. Some cancers and their microenvironment produce suppressive molecules however, which might contribute to tumor escape. This PhD thesis deals with the contribution of TGF-beta to cancer immunoevasion, and means to avoid it. We show that the combination of therapeutic monoclonal antibodies to lymphocytes activated TCR-Vgamma9Vdelta2 gamma delta T cells improves anti-tumoral immunologically-mediated killing and may counter TGF-beta-mediated immunosuppression. We illustrate this concept of targeted therapeutic combination in a murine model of Her2/neu mammary carcinoma xenografts. Together, our results demonstrate the potential of such therapeutic strategies in cancer
Aubin, Eric. "Purification par voie de cristallisation de nouveaux principes actifs organo-phosphorés : Etude de la cristallisation préférentielle du mandélate d’éthanolamine." Rouen, 2006. http://www.theses.fr/2006ROUES049.
Full textPhosphoantigens are are small phosphorylated molecules developed by Innate Pharma company. The preparation of organic salts are allowed to isolate and characterize numerous crystalline phases. DVS measurements were used to bring a fine characterization to two hydrated phases (stoichiometric and non-stoichiometric). Successive crystallization stages allowed to obtain compounds with very high purities (analytical standard). The crystallographic analyses of another phosphoantigen salt gave evidences of the existence of a complete solid solution between the two enantiomers. As a complementary work, the optical resolution by preferential crystallization of a conglomerate that exhibits partial solid solutions at the solid state was studied. Molecular modelling allowed to make a structural hypothesis for the existence of partial solid solutions. The impact of metastable equilibria involved in the preferential crystallization were described and discussed
Gertner-Dardenne, Julie. "Optimisation de l'activité anti-tumorale des lymphocytes T gamma9delta 2 humains." Toulouse 3, 2008. http://thesesups.ups-tlse.fr/195/.
Full textAlthough all vertebrates possess gamma delta T lymphocytes, only primates have a blood-borne gamma delta T cell subset expressing a TCR Vgamma9Vdelta2 receptor. This population reacts to bacterial and tumoral non-peptidic phosphoantigens, triggering its anti-infectious and anti-cancer activity. This thesis deals with the optimization of the therapeutic anti-cancer activity of TCR Vgamma9Vdelta2 gamma delta T lymphocytes. These cytotoxic effectors capture membrane fragments of target cells and release cytolytic granules through their immunological synapse. The timelapse video-microscopy study of the molecular activity at the gamma delta T lymphocytes synapse shows both processes simultaneously. So, the strengthening of the gamma delta T lymphocytes synapses to their target through a combination of phosphoantigen and therapeutic antibody strongly optimizes their anti-tumor efficacy. This thesis presents the molecular basis for a new anti-cancer therapeutic approach