PI3 Kinase Signals BCR-Dependent Mature B Cell Survival

Lakshmi Srinivasan, Yoshiteru Sasaki, Dinis Pedro Calado, Baochun Zhang, Ji Hye Paik, Ronald A. DePinho, Jeffrey L. Kutok, John F. Kearney, Kevin L. Otipoby, Klaus Rajewsky

Research output: Contribution to journalArticlepeer-review

534 Scopus citations

Abstract

Previous work has shown that mature B cells depend upon survival signals delivered to the cells by their antigen receptor (BCR). To identify the molecular nature of this survival signal, we have developed a genetic approach in which ablation of the BCR is combined with the activation of specific, BCR dependent signaling cascades in mature B cells in vivo. Using this system, we provide evidence that the survival of BCR deficient mature B cells can be rescued by a single signaling pathway downstream of the BCR, namely PI3K signaling, with the FOXO1 transcription factor playing a central role.

Original languageEnglish (US)
Pages (from-to)573-586
Number of pages14
JournalCell
Volume139
Issue number3
DOIs
StatePublished - Oct 30 2009
Externally publishedYes

Keywords

  • MOLIMMUNO
  • SIGNALING

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology

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