title: Melatonin promotes the cumulus-oocyte complexes quality of vitrified-thawed murine ovaries; with increased mean number of follicles survival and ovary size following heterotopic transplantation.
abstract: We have tested the protective effect of melatonin on neonate murine ovarian tissue after vitrification, thawing and heterotopic transplantation into ovariectomized recipient mice. Vitrified ovaries from neonate (CBA x C57Bl/6) F1 hybrid mice were thawed under standard condition with or without the addition of 100 microM melatonin. Following transplantation, melatonin (20 mg/kg/day) or saline solution (physiological saline) was injected i.p. to the treated and non-treated groups for 48 h respectively. Follicle survival and development, together with ovary size followed. Also, vaginal cytology was carried out for monitoring restored puberty. Histological and immunohistochemical studies showed that melatonin could promote the quality of the cumulus-oocyte complexes with uniform distribution of granulosa and stromal cells in the ovarian grafts. Furthermore, the mean follicles survival was improved and the ovary size increased (P< or = 0.001). The overall mean number of follicles entering the next maturation stage dramatically increased. However, the revascularization and restoration of puberty of ovarian grafts were similar between melatonin-treated and control groups. In conclusion, melatonin as a protection from ischemic injury and a reduce oxidative stress, was shown beneficial during the early days of transplantation.
authors.affiliation: Department of Anatomy, Faculty of Medicine, Medical Sciences/University of Tehran, Tehran, Iran.
authors.forename: Masoud
authors.initials: M
authors.lastname: Hemadi
authors.forename: Farid
authors.initials: F
authors.lastname: Abolhassani
authors.forename: Mohammad
authors.initials: M
authors.lastname: Akbari
authors.forename: Aligholi
authors.initials: A
authors.lastname: Sobhani
authors.forename: Parichehr
authors.initials: P
authors.lastname: Pasbakhsh
authors.forename: Lars
authors.initials: L
authors.lastname: Ahrlund-Richter
authors.forename: Mohammad H
authors.initials: MH
authors.lastname: Modaresi
authors.forename: Mojdeh
authors.initials: M
authors.lastname: Salehnia
mesh_terms: D000818:Animals; D054885:Cumulus Cells / Q000187:drug effects* / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D005260:Female; D066298:In Vitro Techniques; D008550:Melatonin / Q000494:pharmacology*; D051379:Mice; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D009865:Oocytes / Q000187:drug effects* / Q000378:metabolism; D009929:Organ Size / Q000187:drug effects; D006080:Ovarian Follicle / Q000098:blood supply / Q000187:drug effects* / Q000502:physiology; D010052:Ovariectomy; D010053:Ovary / Q000033:anatomy & histology / Q000187:drug effects* / Q000502:physiology / Q000637:transplantation; D014022:Tissue Survival / Q000187:drug effects*; D016042:Transplantation, Heterotopic; D014621:Vagina / Q000166:cytology / Q000187:drug effects
chemical_list: D008550:Melatonin