Inhibition of mitochondrial function by interferon

被引:54
作者
Lewis, JA
Huq, A
Najarro, P
机构
[1] Department of Anatomy, SUNY Hlth. Sci. Center at Brooklyn, Brooklyn
[2] Dept. of Anatomy, Box 5, SUNY Hlth. Sci. Center at Brooklyn, Brooklyn, NY 11203
关键词
D O I
10.1074/jbc.271.22.13184
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
We showed previously that type I interferon causes a down-regulation of mitochondrial gene expression, We show here that IFN treatment leads to functional impairment of mitochondria, Western blot analysis indicated that interferon treatment reduces the steady-state level of cytochrome b in murine L-929 cells. Interferon produced a reduction in cytochrome c oxidase and NADH-cytochrome c reductase activities of isolated mitochondria as well as inhibiting electron transport in isolated mitochondria and in intact cells. Several mitochondrial mRNAs are affected by interferon treatment in human Daudi lymphoblastoid cells, which are highly sensitive to the antiproliferative effects of interferon, Electron transport in Daudi cells was also inhibited by interferon both in intact cells and isolated mitochondria with a dose response identical to that for the antiproliferative response, In contrast, a Daudi strain resistant to the antiproliferative effects of interferon showed no down-regulation of mRNA expression and no inhibition of electron transport; Possibly as a consequence of the inhibitory effect on mitochondrial gene expression, treatment with interferon causes a reduction in cellular ATP levels, The inhibition of cellular growth by interferon may thus be partly a consequence of a reduction in cellular ATP levels.
引用
收藏
页码:13184 / 13190
页数:7
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