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1篇 您的检索式:作者名="Jeremy Gungabeesoon"
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1Loss of T-cell protein tyrosine phosphatase in the intestinal epithelium promotes local inflammation by increasing colonic stem cell proliferation显示文摘T-cell protein tyrosine phosphatase(TC-PTP)has a critical role in the development of the immune system and has been identified as a negative regulator of inflammation.Single-nucleotide polymorphisms in the TC-PTP locus have been associated with increased susceptibility to inflammatory bowel diseases(IBDs)in patients.To further understand how TC-PTP is related to IBDs,we investigated the role of TC-PTP in maintaining the intestinal epithelial barrier using an in vivo genetic approach.Intestinal epithelial cell(IEC)-specific deletion of TC-PTP was achieved in a mouse model at steady state and in the context of dextran sulphate sodium(DSS)-induced colitis.Knockout(KO)of TC-PTP in IECs did not result in an altered intestinal barrier.However,upon DSS treatment,IECspecific TC-PTP KO mice displayed a more severe colitis phenotype with a corresponding increase in the immune response and inflammatory cytokine profile.The absence of TC-PTP caused an altered turnover of IECs,which is further explained by the role of the tyrosine phosphatase in colonic stem cell(CoSC)proliferation.Our results suggest a novel role for TC-PTP in regulating the homeostasis of CoSC proliferation.This supports the protective function of TC-PTP against IBDs,independently of its previously demonstrated role in intestinal immunity.Stéphanie Bussières-Marmen Valérie Vinette Jeremy Gungabeesoon Isabelle Aubry Luis Alberto Pérez-Quintero Michel L Tremblay 2018Cellular & Molecular Immunology2018,15,4:1
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