Curcumin Reduces Hypoxia/Reperfusion Injury of Cardiomyocytes by Stimulating Vascular Endothelial Cells to Secrete FGF2


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Abstract

Objective::Endothelial cells (ECs) can provide cell protection for cardiomyocytes (CMs) under hypoxia-reoxygenation (HR) conditions by secreting derived factors. This study aimed to explore the role of curcumin (CUR) in ECs for protecting CMs from HR injury.

Methods::A co-culture system for ECs and CMs was set up, and subjected to HR. The transcription, expression, and secretion of FGF2 were detected by RT-qPCR, western blot, and ELISA, respectively. siRNAs specifically targeting FGF2 were transfected into ECs. FGF2 receptor- specific inhibitors (AZD4547) were used to treat CMs.

Results::The co-culture with ECs did not affect the proliferation of CMs, while CUR and ECs co-culture had a synergistic effect on promoting the proliferation of CMs in HR. Furthermore, the co-culture with ECs did not affect the apoptosis and autophagy of CMs in HR. However, the co-culture of ECs after CUR treatment inhibited the apoptosis and autophagy of CMs in HR. CUR treatment significantly enhanced FGF2 mRNA, protein, and secretion levels of ECs in HR. In addition, CUR treatment increased FGF2 levels in the CMs medium in the ECs and CMs co-culture system. The reduction of FGF2 levels in the medium and the inhibition of FGF2 receptors significantly inhibited the proliferation of CMs and significantly promoted the apoptosis and autophagy of CMs in HR.

Conclusion::Focusing on the protective effects of CUR and ECs on cardiomyocytes is of great significance for the treatment of clinical myocardial HR injury.

About the authors

Jian-kun Cui

, Heilongjiang University of Chinese Medicine

Email: info@benthamscience.net

Mingming Fan

, Nangang Branch of Heilongjiang Academy of Traditional Chinese Medicine

Email: info@benthamscience.net

Qinwen Wang

Department of Traditional Chinese Medicine,, Beijing Garrison District Haidian Retired Cadres Twenty- sixth

Author for correspondence.
Email: info@benthamscience.net

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