Author: Anne-laure Joly

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AUTHOR

Anne-laure Joly

showing 3 related works from this author

Heat shock protein 27 is involved in SUMO-2/3 modification of heat shock factor 1 and thereby modulates the transcription factor activity

2009

Heat shock protein 27 (HSP27) accumulates in stressed cells and helps them to survive adverse conditions. We have already shown that HSP27 has a function in the ubiquitination process that is modulated by its oligomerization/phosphorylation status. Here, we show that HSP27 is also involved in protein sumoylation, a ubiquitination-related process. HSP27 increases the number of cell proteins modified by small ubiquitin-like modifier (SUMO)-2/3 but this effect shows some selectivity as it neither affects all proteins nor concerns SUMO-1. Moreover, no such alteration in SUMO-2/3 conjugation is achievable by another HSP, such as HSP70. Heat shock factor 1 (HSF1), a transcription factor responsib…

Protein sumoylationTranscriptional ActivationCancer Researchendocrine systemanimal structuresSUMO proteinHSP27 Heat-Shock ProteinsBiologyurologic and male genital diseasesenvironment and public healthSubstrate Specificity03 medical and health sciencesTransactivation0302 clinical medicineHeat Shock Transcription FactorsHeat shock proteinGeneticsAnimalsHumansAnimals Cell Nucleus/metabolism DNA-Binding Proteins/*metabolism HSP27 Heat-Shock Proteins/chemistry/*metabolism Hela Cells Humans Protein Multimerization Protein Structure[SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular BiologyHSF1Protein Structure QuaternaryMolecular BiologyTranscription factorUbiquitinsHeat-Shock Proteins030304 developmental biologyCell Nucleus0303 health sciencesMolecular biologyHsp70Cell biologyHeat shock factorDNA-Binding ProteinsProtein TransportQuaternary Protein Transport Small Ubiquitin-Related Modifier Proteins/*metabolism Substrate Specificity Transcription Factors/*metabolism Transcriptional Activation Ubiquitins/*metabolism030220 oncology & carcinogenesisembryonic structuresSmall Ubiquitin-Related Modifier ProteinsProtein MultimerizationHeLa CellsMolecular ChaperonesTranscription Factors

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Extracellular HSP27 mediates angiogenesis through Toll-like receptor 3.

2013

The heat-shock protein 27 (HSP27) is up-regulated in tumor cells and released in their microenvironment. Here, we show that extracellular HSP27 has a proangiogenic effect evidenced on chick chorioallantoic membrane. To explore this effect, we test the recombinant human protein (rhHSP27) at physiopathological doses (0.1-10 μg/ml) onto human microvascular endothelial cells (HMECs) grown as monolayers or spheroids. When added onto HMECs, rhHSP27 dose-dependently accelerates cell migration (with a peak at 5 μg/ml) and favors spheroid sprouting within 12-24 h. rhHSP27 increases VEGF gene transcription and promotes secretion of VEGF-activating VEGF receptor type 2. Increased VEGF transcription is…

Vascular Endothelial Growth Factor AImmunoprecipitationAngiogenesisHSP27 Heat-Shock ProteinsNeovascularization PhysiologicBiochemistry03 medical and health sciences0302 clinical medicineHsp27GeneticsExtracellularAnimalsSecretionReceptorMolecular BiologyCells Cultured030304 developmental biology0303 health sciencesbiologyNF-kappa BEndothelial CellsCell migrationMolecular biologyToll-Like Receptor 3Chorioallantoic membraneGene Expression Regulation030220 oncology & carcinogenesisbiology.proteinCalciumBiotechnologyFASEB journal : official publication of the Federation of American Societies for Experimental Biology

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The HSP90 inhibitor, 17AAG, protects the intestinal stem cell niche and inhibits graft versus host disease development.

2016

IF 7.932; International audience; Graft versus host disease (GvHD), which is the primary complication of allogeneic bone marrow transplantation, can alter the intestinal barrier targeted by activated donor T-cells. Chemical inhibition of the stress protein HSP90 was demonstrated in vitro to inhibit T-cell activation and to modulate endoplasmic reticulum (ER) stress to which intestinal cells are highly susceptible. Since the HSP90 inhibitor 17-allylamino-demethoxygeldanamycin (17AAG) is developed in clinics, we explored here its ability to control intestinal acute GvHD in vivo in two mouse GvHD models (C57BL/6 -> BALB/c and FVB/N -> Lgr5-eGFP), ex vivo in intestine organoids and in vitro in …

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