Key result
Myrcene pre-treatment protects against isoproterenol-induced HF in rats by restoring matrix signaling and reducing inflammation.
Why the study?
Reports on the protective effect of myrcene against heart failure remain unclear.
Does myrcene improve cardiac function and reduce inflammation and fibrosis in an isoproterenol-induced heart failure rat model?
Does myrcene improve cardiac function and reduce inflammation and fibrosis in an isoproterenol-induced heart failure rat model?
Myrcene provides cardioprotection in an isoproterenol-induced heart failure rat model by restoring matrix signaling and exerting anti-inflammatory and antioxidant effects.
Should not yet change clinical practice; hypothesis-generating for myrcene in experimental HF and requires human validation.
Introduction: Myrcene, a terpene found in essential oils sourced from plants, is known to elicit various biological effects such as antioxidant, anti-inflammatory, hypoglycaemic, and hepatoprotective activities. However, reports on the protective effect of myrcene against heart failure are still not clear. Hence, in the present study, the experimental model of heart failure was induced using isoproterenol in rats. Material and methods: Wistar male rats were divided into four groups: group I - Control; group II - ISO-induced heart failure; group III - Myrcene pre-treated (1.0 mg/kg/day and ISO); and group IV - Myrcene drug control for the experimental period of 4 weeks. At the end of the treatment, infarct size, cardiac markers, cell stress enzymes such as creatinine kinase, lactate dehydrogenase, inflammatory markers, matrix proteins, and microRNA signatures were elucidated using RT-PCR, ELISA, and immunohistochemistry analysis. Also, myrcene pre-treatment abrogated the inflammatory signals with restored matrix proteins. Furthermore, the microRNA of matrix signalling pathways were also found to be prominently reduced compared to heart failure rats. Conclusions: Myrcene protected hearts from ISO-induced failure in rats and provided a cardioprotective effect via restoring the matrix signalling, anti-inflammatory, and antioxidant effect, which suggests a possible drug candidature for the treatment of cardiac failure.
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Tian et al. (2020) studied Isoproterenol-induced heart failure (n=32). Myrcene vs. Isoproterenol (ISO) alone was evaluated on Cardiac function, cardiac markers, and inflammatory/fibrotic markers (p=<0.001). Myrcene pre-treatment significantly protected against isoproterenol-induced heart failure in rats by restoring matrix signaling, reducing inflammatory cytokines, and improving cardiac function.
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