Lipophilic 2,5-disubstituted pyrroles from the marine sponge Mycale sp. inhibit mitochondrial respiration and HIF-1 activation.

Lipophilic 2,5-disubstituted pyrroles from the marine sponge Mycale sp. inhibit mitochondrial respiration and HIF-1 activation.
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DOI:
10.1021/np900444m
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发表时间:
2009-11
影响因子:
5.1
通讯作者:
Nagle, Dale G.
Nagle, Dale G.
中科院分区:
生物学2区
文献类型:
--
作者:
Mao, Shui-Chun;Liu, Yang;Morgan, J. Brian;Jekabsons, Mika B.;Zhou, Yu-Dong;Nagle, Dale G.

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在基于人乳腺肿瘤T47 D细胞的报告基因测定中,海绵Mycale sp.的脂质提取物抑制缺氧诱导因子-1(HIF-1)的活化。生物测定引导的分离和结构鉴定产生了18个新的亲脂性2,5-二取代吡咯,和8个结构相关的已知化合物。活性化合物以中等效力抑制缺氧诱导的HIF活化(IC 50值< 10 μM)。机制研究表明,活性化合物通过在抑制HIF-1激活的浓度下阻断NADH-泛醌氧化还原酶(复合物I)来抑制线粒体呼吸。在缺氧条件下,线粒体复合物III产生的活性氧被认为是细胞缺氧的信号,导致HIF-1α蛋白的诱导和激活。通过在缺氧条件下抑制电子向复合物III的传递(或递送),亲脂性Mycale吡咯似乎会破坏线粒体ROS调节的HIF-1信号传导。
The lipid extract of the marine sponge Mycale sp. inhibited the activation of hypoxiainducible factor-1 (HIF-1) in a human breast tumor T47D cell-based reporter assay. Bioassay-guided isolation and structure elucidation yielded 18 new lipophilic 2,5-disubstituted pyrroles, and eight structurally related known compounds. The active compounds inhibited hypoxia-induced HIF activation with moderate potency (IC50 values < 10 μM). Mechanistic studies revealed that the active compounds suppressed mitochondrial respiration by blocking NADH-ubiquinone oxidoreductase (complex I) at concentrations that inhibited HIF-1 activation. Under hypoxic conditions, reactive oxygen species produced by mitochondrial complex III are believed to act as a signal of cellular hypoxia that leads to HIF-1α protein induction and activation. By inhibiting electron transport (or delivery) to complex III under hypoxic conditions, lipophilic Mycale pyrroles appear to disrupt mitochondrial ROS-regulated HIF-1 signaling.
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