The oncogenic tyrosine kinase Lyn impairs the pro-apoptotic function of Bim

被引:9
作者
Aira, Lazaro E. [1 ]
Villa, Elodie [1 ]
Colosetti, Pascal [1 ]
Gamas, Parvati [1 ]
Signetti, Laurie [1 ]
Obba, Sandrine [1 ]
Proics, Emma [1 ]
Gautier, Fabien [2 ,3 ]
Bailly-Maitre, Beatrice [1 ]
Jacquel, Arnaud [1 ]
Robert, Guillaume [1 ]
Luciano, Frederic [1 ]
Juin, Philippe P. [2 ,3 ]
Ricci, Jean-Ehrland [1 ]
Auberger, Patrick [1 ]
Marchetti, Sandrine [1 ]
机构
[1] Univ Cote Azur, INSERM, C3M, Nice, France
[2] Univ Nantes, Univ Angers, Inst Rech Sante, INSERM,CRCINA,UMR 1232, 8 Quai Moncousu,BP 70721, F-44007 Nantes 1, France
[3] Inst Cancerol Ouest, Bvd J Monod,Site Rene Gauducheau, F-44805 St Herblain, France
关键词
FAMILY-MEMBER BIM; BCL-2; FAMILY; CELL-DEATH; B-CELLS; PHOSPHORYLATION; PROTEIN; HOMEOSTASIS; RESISTANCE; IMATINIB; PATHWAY;
D O I
10.1038/s41388-017-0112-0
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Phosphorylation of Ser/Thr residues is a well-established modulating mechanism of the pro-apoptotic function of the BH3-only protein Bim. However, nothing is known about the putative tyrosine phosphorylation of this Bcl-2 family member and its potential impact on Bim function and subsequent Bax/Bak-mediated cytochrome c release and apoptosis. As we have previously shown that the tyrosine kinase Lyn could behave as an anti-apoptotic molecule, we investigated whether this Src family member could directly regulate the pro-apoptotic function of Bim. In the present study, we show that Bim is phosphorylated onto tyrosine residues 92 and 161 by Lyn, which results in an inhibition of its pro-apoptotic function. Mechanistically, we show that Lyn-dependent tyrosine phosphorylation of Bim increases its interaction with anti-apoptotic members such as Bcl-xL, therefore limiting mitochondrial outer membrane permeabilization and subsequent apoptosis. Collectively, our data uncover one molecular mechanism through which the oncogenic tyrosine kinase Lyn negatively regulates the mitochondrial apoptotic pathway, which may contribute to the transformation and/or the chemotherapeutic resistance of cancer cells.
引用
收藏
页码:2122 / 2136
页数:15
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