Protective effects of melatonin and ghrelin on spermatogenesis: A narrative review of the literature

Spermatocytogenesis starts from lumens of seminiferous cords and after migration to the basal membrane ends to the lumens again. We attempt to review the protective effects of melatonin and ghrelin on Spermatocytogenesis and in particular onspermatogonial stem cells, as two rather newly-discovered hormones. Testicular freezing prior to chemotherapy and radiotherapy is one of the ways of preservingfertility in children with cancer. The freezing has two methods of slow-freezing (cryopreservation) and rapid-freezing (vitrification). Administration of melatonin can maintain the quality of the germ cells underwent such processes, as well asghrelin, can protect germ cells from the toxicities secondary to ischemic injuries, and pathologic apoptosis. This review indicates that in vitro or in vivo administration of melatonin or ghrelin, could be effective to preserve fertilizationand also they can be used in assisted reproductive technologies to improve thequality of sperms. Future original studies should be propelled toward human studies, of course with observing the ethics.

کلیدواژه ها:

Spermatogonia ، Cryopreservation ، Vitrification ، Melatonin ، Ghrelin