Document Type: Research article
Department of Biology, Faculty of Science, Urmia University, Urmia, Iran.
Department of Basic Sciences, Faculty of Veterinary Medicine, Urmia University, Iran.
Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Urmia University, Iran.
The present study was done to uncover the possible beneficial and/or detrimental effect(s) of nano-micelle curcumin (NMC) on oocyte in-vitro maturation and pre-implantation embryo development. Forty-eight mature female Wistar rats were assigned to control, 7.5, 15, and 30 mg/kg-1 NMC-receiving (orally, for 48 days) groups. To assess the cumulus-oocyte complexes (COCs), the ovaries were stimulated by administrating (i.p.) a 25 IU of the pregnant mare's serum gonadotropin (PMSG) hormone. Following 48-h, 15 IU of hCG was injected (i.p.), and the COCs were taken after 16-18-h. To analyze the pre-implantation embryo development ratio, the sperms were collected from clinically healthy male Wistar rats, and 3.0-3.6 × 106 per mL was added into the fertilization drop. The animals in 7.5 mg/kg-1 NMC-receiving group exhibited a higher oocyte number versus control and other NMC-receiving groups. The NMC, in a dose-dependent manner, decreased the Zygote, 2-cell, blastocyst percentages, as well as hatched embryos, compared to the control group (P < 0.05). The 15 and 30 mg/kg-1 NMC-receiving groups represented a remarkable enhancement in type I arrest. Meanwhile, a significant (P < 0.05) reduction was revealed in type III embryo arrest in the same groups. The NMC, at 7.5 mg/kg-1 potentially enhances the oocyte number, while it fairly reduces the pre-implantation embryo development, even when it is administrated in dose levels of 7.5 mg/kg-1 and/or higher. Although more studies are needed, the NMC could be considered as a suppressor of fertility potential, when consumed chronically even in low doses.