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pubmed-article:16696938pubmed:abstractTextInterferon alpha (IFN-alpha) is produced in response to viral infections and used clinically in the therapy of a variety of cancers and viral infections. IFN-alpha treatment is often associated with severe weight reduction. To elucidate the mechanism of IFN-associated weight loss, we studied its effect on adipocytes in vitro and in vivo. Diet-induced obese (DIO) C57BL/6 mice were treated continuously for 8 days with human IFN-alpha A/D (100 U/g body weight) or with vehicle alone. The body weight and adipose cell size of IFN-alpha A/D-treated DIO mice were significantly lower (P<0.05 and P<0.001, respectively) as compared with those of control DIO mice. PI3K and Bcl-2 were down-regulated whereas Bax expression was elevated in adipose tissue following IFN treatment as compared to adipose tissue of control DIO mice. Treatment of differentiated 3T3-F442A adipocytes with IFN-alpha A/D (250 U/ml, 36 h) significantly increased the number of apoptotic cells from 15.8% in control cells to 56+/-6%. In conclusion, weight loss following IFN-alpha therapy is due at least in part to increased apoptosis of adipocytes.lld:pubmed
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pubmed-article:16696938pubmed:authorpubmed-author:BirkRuth ZRZlld:pubmed
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pubmed-article:16696938pubmed:dateRevised2011-11-17lld:pubmed
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pubmed-article:16696938pubmed:articleTitleIFN-alpha induces apoptosis of adipose tissue cells.lld:pubmed
pubmed-article:16696938pubmed:affiliationNational Institute of Biotechnology, Ben-Gurion University, Beer-Sheba 84105, Israel. rbirk@bgu.ac.illld:pubmed
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