Abstract:
:The proapoptotic activity of the "BH3-only" molecule BAD can be differentially regulated by survival factor signaling. Bad-deficient mice lacking both BAD long and BAD short proteins proved viable, and most cell types appeared to develop normally. BAD did not exclusively account for cell death after withdrawal of survival factors, but it was an intermediate for epidermal growth factor- or insulin-like growth factor I-countered apoptosis, consistent with a "sensitizing" BH3-only molecule. Lymphocytes developed normally with no premalignant hyperplasia, but they displayed subtle abnormalities in proliferation and IgG production. Despite the minimal phenotype, Bad-deficient mice progressed, with aging, to diffuse large B cell lymphoma of germinal center origin. Exposure of Bad-null mice to sublethal gamma-irradiation resulted in an increased incidence of pre-T cell and pro-/pre-B cell lymphoblastic leukemia/lymphoma. Thus, proapoptotic BAD suppresses tumorigenesis in the lymphocyte lineage.
journal_name
Proc Natl Acad Sci U S Aauthors
Ranger AM,Zha J,Harada H,Datta SR,Danial NN,Gilmore AP,Kutok JL,Le Beau MM,Greenberg ME,Korsmeyer SJdoi
10.1073/pnas.1533446100keywords:
subject
Has Abstractpub_date
2003-08-05 00:00:00pages
9324-9issue
16eissn
0027-8424issn
1091-6490pii
1533446100journal_volume
100pub_type
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