Literature DB >> 27324694

Cimetidine down-regulates stability of Foxp3 protein via Stub1 in Treg cells.

Yizhi Zhang1, Zhoujia Chen2, Xuerui Luo2, Bin Wu1, Bin Li2, Bin Wang1,3.   

Abstract

Foxp3-expressing Treg cells have been well documented to provide immune regulation by promoting immune tolerance and suppressing immune over-reaction. Cimetidine (CIM), used to inhibit stomach acid secretion, has been reported to promote immune responses and suppress Treg cell function in several studies. However, the underlying mechanism is unknown. To investigate CIM effects on the suppressive function of Treg and Foxp3, here we used CIM to stimulate human CD4+CD25+ Treg cells and Jurkat T cells and evaluated changes of Foxp3 expression and stability. Our data showed that CIM leads to a reduction of Foxp3 via E3 ligase Stub1-mediated proteosomal degradation, which is dependent on an activated PI3K-AKT-mTOR pathway. Thus, CIM affects the suppressive function of Treg cells by destabilizing their Foxp3 expression.

Entities:  

Keywords:  CD4+CD25+ Treg; Foxp3; Stub1; cimetidine; treg cell

Mesh：

Substances：

Year:  2016        PMID： 27324694      PMCID： PMC5085004          DOI： 10.1080/21645515.2016.1191719

Source DB:  PubMed          Journal:  Hum Vaccin Immunother        ISSN： 2164-5515            Impact factor:   3.452


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