A novel Atg5-shRNA mouse model enables temporal control of Autophagy in vivo.

A novel Atg5-shRNA mouse model enables temporal control of Autophagy in vivo.
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DOI:
10.1080/15548627.2018.1458172
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发表时间:
2018
期刊:
影响因子:
13.3
通讯作者:
Narita M
Narita M
中科院分区:
生物学1区
文献类型:
--
作者:
Cassidy LD;Young AR;Pérez-Mancera PA;Nimmervoll B;Jaulim A;Chen HC;McIntyre DJO;Brais R;Ricketts T;Pacey S;De La Roche M;Gilbertson RJ;Rubinsztein DC;Narita M

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Macroautophagy/autophagy is an evolutionarily conserved catabolic pathway whose modulation has been linked to diverse disease states, including age-associated disorders. Conventional and conditional whole-body knockout mouse models of key autophagy genes display perinatal death and lethal neurotoxicity, respectively, limiting their applications for in vivo studies. Here, we have developed an inducible shRNA mouse model targeting Atg5, allowing us to dynamically inhibit autophagy in vivo, termed ATG5i mice. The lack of brain-associated shRNA expression in this model circumvents the lethal phenotypes associated with complete autophagy knockouts. We show that ATG5i mice recapitulate many of the previously described phenotypes of tissue-specific knockouts. While restoration of autophagy in the liver rescues hepatomegaly and other pathologies associated with autophagy deficiency, this coincides with the development of hepatic fibrosis. These results highlight the need to consider the potential side effects of systemic anti-autophagy therapies.
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