Cardiac-specific microRNA-125b deficiency induces perinatal death and cardiac hypertrophy.
Cardiac-specific microRNA-125b deficiency induces perinatal death and cardiac hypertrophy.
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DOI:
10.1038/s41598-021-81700-y
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发表时间:
2021-01-27
影响因子:
4.6
通讯作者:
Hsieh PCH
中科院分区:
文献类型:
--
作者:
Chen CY;Lee DS;Choong OK;Chang SK;Hsu T;Nicholson MW;Liu LW;Lin PJ;Ruan SC;Lin SW;Hu CY;Hsieh PCH
MicroRNA-125b, the first microRNA to be identified, is known to promote cardiomyocyte maturation from embryonic stem cells; however, its physiological role remains unclear. To investigate the role of miR-125b in cardiovascular biology, cardiac-specific miR-125b-1 knockout mice were generated. We found that cardiac-specific miR-125b-1 knockout mice displayed half the miR-125b expression of control mice resulting in a 60% perinatal death rate. However, the surviving mice developed hearts with cardiac hypertrophy. The cardiomyocytes in both neonatal and adult mice displayed abnormal mitochondrial morphology. In the deficient neonatal hearts, there was an increase in mitochondrial DNA, but total ATP production was reduced. In addition, both the respiratory complex proteins in mitochondria and mitochondrial transcription machinery were impaired. Mechanistically, using transcriptome and proteome analysis, we found that many proteins involved in fatty acid metabolism were significantly downregulated in miR-125b knockout mice which resulted in reduced fatty acid metabolism. Importantly, many of these proteins are expressed in the mitochondria. We conclude that miR-125b deficiency causes a high mortality rate in neonates and cardiac hypertrophy in adult mice. The dysregulation of fatty acid metabolism may be responsible for the cardiac defect in the miR-125b deficient mice.
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影响因子:
9.3
作者:
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通讯作者:
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DOI:
10.1126/science.aad2459
发表时间:
2015-12-04
期刊:
Science (New York, N.Y.)
影响因子:
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4.1
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DOI:
10.1073/pnas.0710228105
发表时间:
2008-02-12
影响因子:
11.1
作者:
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通讯作者:
Wang, Da-Zhi