Cutting Edge: Differential Regulation of PTEN by TCR, Akt, and FoxO1 Controls CD4+ T Cell Fate Decisions.
Cutting Edge: Differential Regulation of PTEN by TCR, Akt, and FoxO1 Controls CD4+ T Cell Fate Decisions.
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DOI:
10.4049/jimmunol.1402554
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发表时间:
2015-05-15
期刊:
影响因子:
--
通讯作者:
Morel PA
中科院分区:
文献类型:
--
作者:
Hawse WF;Sheehan RP;Miskov-Zivanov N;Menk AV;Kane LP;Faeder JR;Morel PA
Signaling via the Akt/mTOR pathway influences CD4+ T cell differentiation; low levels favor Treg induction and high levels favor Th induction. Although the lipid phosphatase PTEN suppresses Akt activity the control of PTEN activity is poorly studied in T cells. Here, we identify multiple mechanisms that regulate PTEN expression. During Th induction, PTEN function is suppressed via lower mRNA levels, lower protein levels and an increase in C terminal phosphorylation. Conversely, during Treg induction, PTEN function is maintained through the stabilization of PTEN mRNA transcription and sustained protein levels. We demonstrate that differential Akt/mTOR signaling regulates PTEN transcription via the FoxO1 transcription factor. A mathematical model that includes multiple modes of PTEN regulation recapitulates our experimental findings and demonstrates how several feedback loops determine differentiation outcomes. Together, this work provides novel mechanistic insights into how differential regulation of PTEN controls alternate CD4+ T cell fate outcomes.
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DOI:
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发表时间:
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期刊:
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影响因子:
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通讯作者:
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