Mahla Honari Chatroudi1, Mohammad Ali Khalili1,2, Sareh Ashourzadeh3, Fatemeh Anbari2, Abbas Shahedi1, Somayyeh Safari4. 1. Department of Anatomy and Cell Biology, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran. 2. Department of Reproductive Biology, Yazd Reproductive Science Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. 3. Kerman Infertility Center, Afzalipour Hospital, Kerman University of Medical Sciences, Kerman, Iran. 4. Hospital Research Development Committee, Nekoei-Hedayati-Forghani Hospital, Qom University of Medical Science, Qom, Iran.
Abstract
OBJECTIVE: In vitro maturation (IVM) of immature oocytes can be useful for some infertile patients. In IVM programs, the rates of embryo formation and pregnancy are low. Therefore, it is essential to recognize the main factors involved in regulating oocyte maturation in vitro. The purpose of this study was to investigate the effects of growth differentiation factor 9 (GDF9) and cumulus cell (CC) supplementation in IVM medium on the rates of embryo formation and viability of human blastocysts. METHODS: A total of 80 germinal vesicle oocytes from stimulated cycles underwent an IVM program. The oocytes were divided into four groups, where group I consisted of IVM media only and served as the control, group II consisted of IVM+CCs, group III consisted of IVM+GDF9 (200 ng/mL), and group IV consisted of IVM+CCs+GDF9 (200 ng/mL). Intracytoplasmic sperm injection was performed on the IVM oocytes, and the cleavage embryos that were generated were vitrified. Following thawing, the embryos were cultured for 3 additional days, and the viability rates of the developed blastocysts were determined. RESULTS: The maturation rate of the oocytes did not differ significantly across the four groups. The fertilization rate in group II was significantly higher than that in the control group (76.5% vs. 46.2%). Embryo formation was significantly more frequent in all experimental groups than in the control group, while blastocyst formation did not show significant differences in the three experimental groups compared to the control. The mean viability rates in groups II, III, and IV were 58.16%, 55.91%, and 55.95%, respectively, versus 37.78% in the control group (p<0.05). CONCLUSION: Supplementation of IVM culture media with GDF9 and CCs enhanced the fertilization, embryo formation, and viability rates of blastocysts generated from vitrified cleavage embryos.
OBJECTIVE: In vitro maturation (IVM) of immature oocytes can be useful for some infertilepatients. In IVM programs, the rates of embryo formation and pregnancy are low. Therefore, it is essential to recognize the main factors involved in regulating oocyte maturation in vitro. The purpose of this study was to investigate the effects of growth differentiation factor 9 (GDF9) and cumulus cell (CC) supplementation in IVM medium on the rates of embryo formation and viability of human blastocysts. METHODS: A total of 80 germinal vesicle oocytes from stimulated cycles underwent an IVM program. The oocytes were divided into four groups, where group I consisted of IVM media only and served as the control, group II consisted of IVM+CCs, group III consisted of IVM+GDF9 (200 ng/mL), and group IV consisted of IVM+CCs+GDF9 (200 ng/mL). Intracytoplasmic sperm injection was performed on the IVM oocytes, and the cleavage embryos that were generated were vitrified. Following thawing, the embryos were cultured for 3 additional days, and the viability rates of the developed blastocysts were determined. RESULTS: The maturation rate of the oocytes did not differ significantly across the four groups. The fertilization rate in group II was significantly higher than that in the control group (76.5% vs. 46.2%). Embryo formation was significantly more frequent in all experimental groups than in the control group, while blastocyst formation did not show significant differences in the three experimental groups compared to the control. The mean viability rates in groups II, III, and IV were 58.16%, 55.91%, and 55.95%, respectively, versus 37.78% in the control group (p<0.05). CONCLUSION: Supplementation of IVM culture media with GDF9 and CCs enhanced the fertilization, embryo formation, and viability rates of blastocysts generated from vitrified cleavage embryos.
Authors: Fatemeh Anbari; Mohammad Ali Khalili; Maryam Mahaldashtian; Alireza Ahmadi; Maria Grazia Palmerini Journal: Turk J Obstet Gynecol Date: 2022-06-27
Authors: Huixia Yang; Thomas Kolben; Sarah Meister; Corinna Paul; Julia van Dorp; Sibel Eren; Christina Kuhn; Martina Rahmeh; Sven Mahner; Udo Jeschke; Viktoria von Schönfeldt Journal: Biomedicines Date: 2021-12-14