Pancreatic β-cell tRNA hypomethylation and fragmentation link TRMT10A deficiency with diabetes.
Pancreatic β-cell tRNA hypomethylation and fragmentation link TRMT10A deficiency with diabetes.
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DOI:
10.1093/nar/gky839
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发表时间:
2018-11-02
影响因子:
14.9
通讯作者:
Igoillo-Esteve M
中科院分区:
文献类型:
--
作者:
Cosentino C;Toivonen S;Diaz Villamil E;Atta M;Ravanat JL;Demine S;Schiavo AA;Pachera N;Deglasse JP;Jonas JC;Balboa D;Otonkoski T;Pearson ER;Marchetti P;Eizirik DL;Cnop M;Igoillo-Esteve M
Transfer RNAs (tRNAs) are non-coding RNA molecules essential for protein synthesis. Post-transcriptionally they are heavily modified to improve their function, folding and stability. Intronic polymorphisms in CDKAL1, a tRNA methylthiotransferase, are associated with increased type 2 diabetes risk. Loss-of-function mutations in TRMT10A, a tRNA methyltransferase, are a monogenic cause of early onset diabetes and microcephaly. Here we confirm the role of TRMT10A as a guanosine 9 tRNA methyltransferase, and identify tRNAGln and tRNAiMeth as two of its targets. Using RNA interference and induced pluripotent stem cell-derived pancreatic β-like cells from healthy controls and TRMT10A-deficient patients we demonstrate that TRMT10A deficiency induces oxidative stress and triggers the intrinsic pathway of apoptosis in β-cells. We show that tRNA guanosine 9 hypomethylation leads to tRNAGln fragmentation and that 5′-tRNAGln fragments mediate TRMT10A deficiency-induced β-cell death. This study unmasks tRNA hypomethylation and fragmentation as a hitherto unknown mechanism of pancreatic β-cell demise relevant to monogenic and polygenic forms of diabetes.
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影响因子:
14.9
作者:
Haiser HJ;Karginov FV;Hannon GJ;Elliot MA
通讯作者:
Elliot MA
影响因子:
5.3
作者:
Guan, MX;Enriquez, JA;Attardi, G
通讯作者:
Attardi, G
影响因子:
4.5
作者:
Gustavsson, Marie;Ronne, Hans
通讯作者:
Ronne, Hans
影响因子:
1.5
作者:
Garcia-Silva, Maria Rosa;Frugier, Magali;Cayota, Alfonso
通讯作者:
Cayota, Alfonso
影响因子:
4.1
作者:
de Souza, Arnaldo H.;Santos, Laila R. B.;Jonas, Jean-Christophe
通讯作者:
Jonas, Jean-Christophe