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p62–Keap1–Nrf2–Nqo1 信号通路可能与抗老化有关

2012-02-17 MedSci MedSci原创

韩国媒体报道,韩国成均馆大学医学院分子细胞生物学教室的申在均(音译)教授团队今天表示,透过老鼠实验,发现若缺乏名為p62的基因,则细胞内粒腺体的功能会衰弱,使得快速老化。 研究团队证实,正常老鼠的寿命越老时,p62基因就会急遽减少,p62基因功能越衰弱,就越无法抑制老化。 研究团队表示,p62基因能稳定名為Nrf2的转录因子(transcription factor),使名为Nqo1的抗氧化酵

韩国媒体报道,韩国成均馆大学医学院分子细胞生物学教室的申在均(音译)教授团队今天表示,透过老鼠实验,发现若缺乏名為p62的基因,则细胞内粒腺体的功能会衰弱,使得快速老化。

研究团队证实,正常老鼠的寿命越老时,p62基因就会急遽减少,p62基因功能越衰弱,就越无法抑制老化。

研究团队表示,p62基因能稳定名為Nrf2的转录因子(transcription factor),使名为Nqo1的抗氧化酵素维持在一定水準,结果会导致细胞内氧化物质减少并抑制老化。

研究团队期盼此次研究能有助於日后开发人类抗老化的药物。(生物谷 Bioon.com)

doi:10.1038/embor.2011.246
Assurance of mitochondrial integrity and mammalian longevity by the p62–Keap1–Nrf2–Nqo1 cascade

Jeongho Kwon, Eunhye Han, Chi-Bao Bui, Woochul Shin, Junho Lee, Sejeong Lee, Young-Bong Choi, Ann-Hwee Lee, Kyong-Hoon Lee, Chankyu Park, Martin S Obin, Sung Kyu Park, Yun Jeong Seo, Goo Taeg Oh, Han-Woong Lee & Jaekyoon Shin

Sqstm1/p62 functions in the non-canonical activation of nuclear factor (erythroid-derived 2)-like 2 (Nrf2). However, its physiological relevance is not certain. Here, we show that p62 −/− mice exhibited an accelerated presentation of ageing phenotypes, and tissues from these mice created a pro-oxidative environment owing to compromised mitochondrial electron transport. Accordingly, mitochondrial function rapidly declined with age in p62 −/− mice. In addition, p62 enhanced basal Nrf2 activity, conferring a higher steady-state expression of NAD(P)H dehydrogenase, quinone 1 (Nqo1) to maintain mitochondrial membrane potential and, thereby, restrict excess oxidant generation. Together, the p62–Nrf2–Nqo1 cascade functions to assure mammalian longevity by stabilizing mitochondrial integrity.

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    2012-02-19 minzju5053
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    2012-02-19 villahu

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