Rapamycin treatment during in vitro maturation of oocytes improves embryonic development after parthenogenesis and somatic cell nuclear transfer in pigs.
10.4142/jvs.2015.16.3.373
- Author:
Joohyeong LEE
1
;
Jong Im PARK
;
Jung Im YUN
;
Yongjin LEE
;
Hwanyul YONG
;
Seung Tae LEE
;
Choon Keun PARK
;
Sang Hwan HYUN
;
Geun Shik LEE
;
Eunsong LEE
Author Information
1. College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Korea. eslee@kangwon.ac.kr
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
autophagy;
oocyte maturation;
pig;
rapamycin;
somatic cell nuclear transfer
- MeSH:
Animals;
Embryonic Development/*drug effects;
Female;
In Vitro Oocyte Maturation Techniques/veterinary;
Nuclear Transfer Techniques/*veterinary;
Oocytes/growth & development;
*Parthenogenesis;
Sirolimus/*pharmacology;
Sus scrofa/*growth & development/metabolism
- From:Journal of Veterinary Science
2015;16(3):373-380
- CountryRepublic of Korea
- Language:English
-
Abstract:
This study was conducted to investigate the effects of rapamycin treatment during in vitro maturation (IVM) on oocyte maturation and embryonic development after parthenogenetic activation (PA) and somatic cell nuclear transfer (SCNT) in pigs. Morphologically good (MGCOCs) and poor oocytes (MPCOCs) were untreated or treated with 1 nM rapamycin during 0-22 h, 22-42 h, or 0-42 h of IVM. Rapamycin had no significant effects on nuclear maturation and blastocyst formation after PA of MGCOCs. Blastocyst formation after PA was significantly increased by rapamycin treatment during 22-42 h and 0-42 h (46.6% and 46.5%, respectively) relative to the control (33.3%) and 0-22 h groups (38.6%) in MPCOCs. In SCNT, blastocyst formation tended to increase in MPCOCs treated with rapamycin during 0-42 h of IVM relative to untreated oocytes (20.3% vs. 14.3%, 0.05 < p < 0.1), while no improvement was observed in MGCOCs. Gene expression analysis revealed that transcript abundance of Beclin 1 and microtubule-associated protein 1 light chain 3 mRNAs was significantly increased in MPCOCs by rapamycin relative to the control. Our results demonstrated that autophagy induction by rapamycin during IVM improved developmental competence of oocytes derived from MPCOCs.
