Abstract:
:The precise molecular mechanism underlying the regulation of early B cell lymphopoiesis is unclear. The PLCγ signaling pathway is critical for antigen receptor-mediated lymphocyte activation, but its function in cytokine signaling is unknown. Here we show that PLCγ1/PLCγ2 double deficiency in mice blocks early B cell development at the pre-pro-B cell stage and renders B cell progenitors unresponsive to IL-7. PLCγ pathway inhibition blocks IL-7-induced activation of mTOR, but not Stat5. The PLCγ pathway activates mTOR through the DAG/PKC signaling branch, independent of the conventional Akt/TSC/Rheb signaling axis. Inhibition of PLCγ/PKC-induced mTOR activation impairs IL-7-mediated B cell development. PLCγ1/PLCγ2 double-deficient B cell progenitors have reduced expression of genes related to B cell lineage, IL-7 signaling, and cell cycle. Thus, IL-7 receptor controls early B lymphopoiesis through activation of mTOR via PLCγ/DAG/PKC signaling, not via Akt/Rheb signaling.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Yu M,Chen Y,Zeng H,Zheng Y,Fu G,Zhu W,Broeckel U,Aggarwal P,Turner A,Neale G,Guy C,Zhu N,Chi H,Wen R,Wang Ddoi
10.1038/s41467-017-01388-5subject
Has Abstractpub_date
2017-11-13 00:00:00pages
1457issue
1issn
2041-1723pii
10.1038/s41467-017-01388-5journal_volume
8pub_type
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