Temporal inhibition of autophagy reveals segmental reversal of aging with increased cancer risk

Temporal inhibition of autophagy reveals segmental reversal of aging with increased cancer risk
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自噬的暂时抑制揭示了衰老的节段逆转与癌症风险增加

DOI:
10.1101/528984
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发表时间:
2019
期刊:
--
影响因子:
--
通讯作者:
Cassidy L
Cassidy L
中科院分区:
--
文献类型:
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作者:
Cassidy L

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自噬是一种重要的细胞降解途径,在代谢和基本质量控制中起着核心作用,这两个过程与衰老有着千丝万缕的联系。自噬的减少与年龄的增长有关,但尚不清楚这是否在衰老过程中是因果关系,以及自噬恢复是否可以抵消这些衰老效应。在这里,我们证明了系统性自噬抑制诱导哺乳动物过早获得与年龄相关的表型和病理。值得注意的是,自噬修复提供了几乎完全恢复的发病率和显著延长寿命;然而,在分子水平上,这种拯救似乎是不完整的。重要的是,由于自发肿瘤形成的增加,自噬恢复的小鼠仍然更早死亡。因此,我们的数据表明,慢性自噬抑制会导致癌症风险的不可逆增加,并揭示了自噬在癌症发展中的双相作用,即抑制肿瘤和致癌。
Autophagy is an important cellular degradation pathway with a central role in metabolism as well as basic quality control, two processes inextricably linked to ageing. A decrease in autophagy is associated with increasing age, yet it is unknown if this is causal in the ageing process, and whether autophagy restoration can counteract these ageing effects. Here we demonstrate that systemic autophagy inhibition induces the premature acquisition of age-associated phenotypes and pathologies in mammals. Remarkably, autophagy restoration provides a near complete recovery of morbidity and a significant extension of lifespan; however, at the molecular level this rescue appears incomplete. Importantly autophagy-restored mice still succumb earlier due to an increase in spontaneous tumour formation. Thus, our data suggest that chronic autophagy inhibition confers an irreversible increase in cancer risk and uncovers a biphasic role of autophagy in cancer development being both tumour suppressive and oncogenic, sequentially.
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