Abstract:
:FoxO3a is a member of the forkhead box class O (FoxO) transcription factor family and an important regulator of apoptosis. This work aimed to elucidate the involvement of FoxO3a in transforming growth factor-beta1 (TGF-beta1)-induced apoptosis in FaO rat hepatoma cells. TGF-beta1 caused a time-dependent activation of FoxO3a and a subsequent increase in FoxO response-element-containing luciferase reporter activity, which was Akt-sensitive. The FaO cells stably transfected with a wild type FoxO3a were more susceptible to the formation of apoptotic bodies, populations of sub-G1 apoptotic cells, and collapse of the mitochondrial-membrane potential triggered by TGF-beta1. In contrast, transfection with small-interfering RNA (siRNA) oligonucleotide specific for FoxO3a significantly inhibited caspase activation in FaO cells treated with TGF-beta1. It thus appears that FoxO3a plays a crucial mediatory role in the TGF-beta1 signaling pathway leading to apoptosis.
journal_name
BMB Repjournal_title
BMB reportsauthors
Kim BCdoi
10.5483/bmbrep.2008.41.10.728subject
Has Abstractpub_date
2008-10-31 00:00:00pages
728-32issue
10eissn
1976-6696issn
1976-670Xjournal_volume
41pub_type
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