Abstract
This study was designed to understand the efficacy and molecular cues of melatonin in cyclophosphamide(CTX)-induced premature ovarian failure (POF) in rats. Female SD rats were used to evaluate the potential effects of melatonin on the ovarian hormonal status, follicular development, and granulosa cells in CTX-treated rats. Here, we found that pretreatment with melatonin before CTX administration preserved the normal sex hormone levels, improved follicular morphology, and granulosa cell proliferation, and reduced apoptosis, as compared to the CTX treatment alone. Additionally, melatonin also up-regulated CYR6 and CTGF at the mRNA and protein levels. A potential mechanism is that melatonin inhibits LATS1, Mps1-One binder (MOB1), and YAP phosphorylation, thereby activating the Hippo signal pathway to promote its downstream targets, CYR61 and CTGF. In conclusion, pretreatment with melatonin effectively protected the ovaries against CTX-induced damage by activating the Hippo pathway. This study lay the foundation for the clinical application of melatonin for cancer patients with CTX treatment.
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