PMID- 33920315 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210518 IS - 2076-2615 (Print) IS - 2076-2615 (Electronic) IS - 2076-2615 (Linking) VI - 11 IP - 4 DP - 2021 Apr 10 TI - Melatonin Restores the Developmental Competence of Heat Stressed Porcine Oocytes, and Alters the Expression of Genes Related to Oocyte Maturation. LID - 10.3390/ani11041086 [doi] LID - 1086 AB - Melatonin enhances the quality and in vitro maturation (IVM) of oocytes under heat stress (HS), but the mechanism of melatonin in reducing HS injury on oocytes is not fully understood. In this study, porcine cumulus-oocyte complexes (COCs) were randomly divided into three groups. The COCs of the control group were cultured at 38.5 degrees C for 42 h, and the COCs of the HS group were cultured at 41.5 degrees C for 4 h, and then transferred into 38.5 degrees C for 38 h. The COCs of the HS + melatonin group were cultured with 10(-9) M melatonin under the same conditions as the HS group. The survival rate, maturation rate, distribution of alpha-tubulin and F-actin of the oocytes were assessed. In addition, the expression profiles for genes related to the oocyte maturation, including heat shock protein 70 (HSP70), nuclear factor erythroid 2-related factor 2 (NRF2), cyclin-dependent kinase 1 (CDK1), growth differentiation factor 9 (GDF9) were analyzed by real-time quantitative PCR. The results showed that HS decreased the survival rate and maturation rate, distribution of alpha-tubulin and F-actin, but melatonin treatment could partly counteract these adverse effects. In addition, HS increased expression of HSP70 and NRF2 mRNA, and melatonin treatment had a similar effect on HSP70 expression, but had a contrary effect on NRF2 expression. Furthermore, HS inhibited expression of CDK1 and GDF9 mRNA, but melatonin treatment could weaken the effect on GDF9 expression induced by HS. In summary, melatonin treatment could attenuate the unfavorable effects induced by HS to enhance developmental competence of porcine oocytes during IVM. FAU - Yang, Ling AU - Yang L AUID- ORCID: 0000-0003-4385-0024 AD - School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China. FAU - Zhao, Zimo AU - Zhao Z AUID- ORCID: 0000-0001-9552-0997 AD - School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China. AD - Animal Husbandry and Veterinary Research Institute of Tianjin, Tianjin 300412, China. FAU - Cui, Maosheng AU - Cui M AD - Animal Husbandry and Veterinary Research Institute of Tianjin, Tianjin 300412, China. FAU - Zhang, Leying AU - Zhang L AD - School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China. FAU - Li, Qianjun AU - Li Q AD - Animal Husbandry and Veterinary Research Institute of Tianjin, Tianjin 300412, China. LA - eng GR - 2016YFD0500502/National Key Research and Development Program of China/ GR - ZD2016069/Technology Research Project of Higher Education Institutions of Hebei Province, China/ PT - Journal Article DEP - 20210410 PL - Switzerland TA - Animals (Basel) JT - Animals : an open access journal from MDPI JID - 101635614 PMC - PMC8069948 OTO - NOTNLM OT - in vitro maturation OT - melatonin OT - oocyte OT - pig COIS- The authors declare no conflict of interest. EDAT- 2021/05/01 06:00 MHDA- 2021/05/01 06:01 PMCR- 2021/04/10 CRDT- 2021/04/30 01:15 PHST- 2021/03/12 00:00 [received] PHST- 2021/04/06 00:00 [revised] PHST- 2021/04/08 00:00 [accepted] PHST- 2021/04/30 01:15 [entrez] PHST- 2021/05/01 06:00 [pubmed] PHST- 2021/05/01 06:01 [medline] PHST- 2021/04/10 00:00 [pmc-release] AID - ani11041086 [pii] AID - animals-11-01086 [pii] AID - 10.3390/ani11041086 [doi] PST - epublish SO - Animals (Basel). 2021 Apr 10;11(4):1086. doi: 10.3390/ani11041086.