About this Medicine article
Regulation of cardiac microRNAs by serum response factor by Xiaomin Zhang; Gohar Azhar; Scott A Helms; Jeanne Y Wei is a Medicine article available to read on EtoBox.
Serum response factor (SRF) regulates certain microRNAs that play a role in cardiac and skeletal muscle development. However, the role of SRF in the regulation of microRNA expression and microRNA biogenesis in cardiac hypertrophy has not been well established. In this report, we employed two distinct transgenic mouse models to study the impact of SRF on cardiac microRNA expression and microRNA biogenesis. Cardiac-specific overexpression of SRF (SRF-Tg) led to altered expression of a number of microRNAs. Interestingly, downregulation of miR-1, miR-133a and upregulation of miR-21 occurred by 7 days of age in these mice, long before the onset of cardiac hypertrophy, suggesting that SRF overexpression impacted the expression of microRNAs which contribute to cardiac hypertrophy. Reducing cardiac SRF level using the antisense-SRF transgenic approach (Anti-SRF-Tg) resulted in the expression of miR-1, miR-133a and miR-21 in the opposite direction. Furthermore, we observed that SRF regulates microRNA biogenesis, specifically the transcription of pri-microRNA, thereby affecting the mature microRNA level. The mir-21 promoter sequence is conserved among mouse, rat and human; one SRF binding si
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- Author
- Xiaomin Zhang; Gohar Azhar; Scott A Helms; Jeanne Y Wei
- Publisher
- BioMed Central; Springer (Biomed Central Ltd.); BioMed Central Ltd.; [Basel Switzerland]: Karger; London: 2009-; Springer Science and Business Media LLC; S. Karger AG; Society for Mining, Metallurgy and Exploration Inc. (ISSN 1021-7770)
- Published
- 2011
- Language
- EN
- Field
- Medicine (Life Sciences)