Endogenous Bcl-x(L) is essential for Myc-driven lymphomagenesis in mice
- Author(s)
- Kelly, PN; Grabow, S; Delbridge, ARD; Strasser, A; Adams, JM;
- Details
- Publication Year 2011-12-08,Volume 118,Issue #24,Page 6380-6386
- Journal Title
- BLOOD
- Publication Type
- Journal Article
- Abstract
- Impaired apoptosis is a cancer hallmark, and some types of lymphomas and other cancers harbor mutations that directly affect key cell death regulators, such as Bcl-2 family members. However, because the majority of tumors seem to lack such mutations, we are examining the hypothesis that tumorigenesis can be sustained at least initially by the normal expression of specific endogenous pro-survival Bcl-2 family members. We previously demonstrated that the lymphomagenesis in E mu-myc transgenic mice, which constitutively overexpress the c-Myc oncoprotein in B-lymphoid cells and develop pre-B and B-cell lymphomas, does not require endogenous Bcl-2. In striking contrast, we report here that loss in these mice of its close relative Bcl-x(L) attenuated the pre-neoplastic expansion of pro-B and pre-B cells otherwise driven by c-Myc overexpression, sensitized these cells to apoptosis and ablated lymphoma formation. Remarkably, even loss of a single bcl-x allele delayed the lymphomagenesis. These findings identify Bcl-x(L) as a prerequisite for the emergence of c-Myc-driven pre-B/B lymphoma and suggest that BH3 mimetic drugs may provide a prophylactic strategy for c-Myc-driven tumors. (Blood. 2011;118(24):6380-6386)
- Publisher
- AMER SOC HEMATOLOGY
- Keywords
- APOPTOTIC CELL-DEATH; C-MYC; TRANSGENIC MICE; B-CELLS; BH3-ONLY PROTEINS; PRE-B; BCL-2; FAMILY; PUMA; LEUKEMIA
- Research Division(s)
- Molecular Genetics Of Cancer
- Publisher's Version
- https://doi.org/10.1182/blood-2011-07-367672
- Open Access at Publisher's Site
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Creation Date: 2011-12-08 12:00:00