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Ischaemic preconditioning-regulated miR-21 protects heart against ischaemia/reperfusion injury via anti-apoptosis through its target PDCD4

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Cheng, Y., Zhu, P., Yang, J., Liu, X., Dong, S., Wang, X., Chun, B., Zhuang, J., Zhang, C.·2010·Cardiovascular Research

Abstract

AIMS: The aims of the present study are to determine the miRNA expression signature in rat hearts after ischaemic preconditioning (IP) and to identify an IP-regulated miRNA, miR-21, in IP-mediated cardiac protection, and the potential cellular and molecular mechanisms involved. METHODS AND RESULTS: The miRNA expression signature was investigated in rat hearts. Among the 341 arrayed miRNAs, 40 miRNAs were differentially expressed (21 up and 19 down) in rat hearts with IP, compared with their controls. Some of these differentially expressed miRNAs were further verified by quantitative reverse transcriptase-polymerase chain reaction. Remarkably, miR-21 was one of most upregulated miRNAs in hearts after IP. In vivo, IP-mediated cardiac protection against ischaemia/reperfusion injury was inhibited by knockdown of cardiac miR-21. In cultured cardiac myocytes, we identified that miR-21 also had a protective effect on hypoxia/reoxygenation-induced cell apoptosis that was associated with its target gene, programmed cell death 4. The protective effect of miR-21 on cardiac cell apoptosis was further confirmed in rat hearts after ischaemia/reperfusion injury in vivo. CONCLUSION: The results suggest that miRNAs are involved in IP-mediated cardiac protection. Identifying the roles of IP-regulated miRNAs in cardiac protection may provide novel therapeutic and preventive targets for ischaemic heart disease.

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Metadata

Authors
Cheng, Y., Zhu, P., Yang, J., Liu, X., Dong, S., Wang, X., Chun, B., Zhuang, J., & Zhang, C.
Venue
Cardiovascular Research
Published
2010-03-10
Volume
87
Issue
3
Pages
431-439
ISSN
0008-6363 (ISSN-L)
OpenAlex
W2121236121
Cited by
331
References
21
FWCI
17.12
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Ischaemic preconditioning-regulated miR-21 protects heart against ischaemia/reperfusion injury via anti-apoptosis through its target PDCD4. https://app.cochat.ai/papers/10.1093/cvr/cvq082
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Cheng, Y., Zhu, P., Yang, J., Liu, X., Dong, S., Wang, X., Chun, B., Zhuang, J., & Zhang, C. (2010). Ischaemic preconditioning-regulated miR-21 protects heart against ischaemia/reperfusion injury via anti-apoptosis through its target PDCD4. Cardiovascular Research. https://doi.org/10.1093/cvr/cvq082

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