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MiR-142-3p restricts cAMP production in CD4+CD25- T cells and CD4+CD25+ TREG cells by targeting AC9 mRNA.

ABSTRACT: Cyclic AMP (cAMP) is a ubiquitous second messenger that regulates diverse cellular functions. It has been found that CD4(+)CD25(+) regulatory T (T(REG)) cells exert their suppressor function by transferring cAMP to responder T cells. Here, we show that miR-142-3p regulates the production of cAMP by targeting adenylyl cyclase (AC) 9 messenger RNA in CD4(+)CD25(-) T cells and CD4(+)CD25(+) T(REG) cells. miR-142-3p limits the level of cAMP in CD4(+)CD25(-) T cells by inhibiting AC9 production, whereas forkhead box P3 (FOXP3) downregulates miR-142-3p to keep the AC9/cAMP pathway active in CD4(+)CD25(+) T(REG) cells. These findings reveal a new molecular mechanism through which CD4(+)CD25(+) T(REG) cells contain a high level of cAMP for their suppressor function, and also suggest that the microRNA controlling AC expression might restrict the final level of cAMP in various types of cells.

SUBMITTER: Huang B

PROVIDER: S-EPMC2637310 | biostudies-literature | 2009 Feb

REPOSITORIES: biostudies-literature

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miR-142-3p restricts cAMP production in CD4+CD25- T cells and CD4+CD25+ TREG cells by targeting AC9 mRNA.

Huang Bo B Zhao Jie J Lei Zhang Z Shen Shiqian S Li Dong D Shen Guan-Xin GX Zhang Gui-Mei GM Feng Zuo-Hua ZH

EMBO reports 20081219 2

Cyclic AMP (cAMP) is a ubiquitous second messenger that regulates diverse cellular functions. It has been found that CD4(+)CD25(+) regulatory T (T(REG)) cells exert their suppressor function by transferring cAMP to responder T cells. Here, we show that miR-142-3p regulates the production of cAMP by targeting adenylyl cyclase (AC) 9 messenger RNA in CD4(+)CD25(-) T cells and CD4(+)CD25(+) T(REG) cells. miR-142-3p limits the level of cAMP in CD4(+)CD25(-) T cells by inhibiting AC9 production, wher ...[more]

PMID: 19098714

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