Gene expression changes in response to low temperatures in embryos of the kelp grouper, Epinephelus moara.

Autor: Chen ZF; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266000, China., Tian YS; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266000, China. Electronic address: tianys@ysfri.ac.cn., Ma WH; Ming Bo Aquatic Co. Ltd., Laizhou, 261400, China., Zhai JM; Ming Bo Aquatic Co. Ltd., Laizhou, 261400, China.
Jazyk: angličtina
Zdroj: Cryobiology [Cryobiology] 2020 Dec; Vol. 97, pp. 159-167. Date of Electronic Publication: 2020 Jul 03.
DOI: 10.1016/j.cryobiol.2020.05.013
Abstrakt: The kelp grouper Epinephelus moara has high economic value and is popular in fisheries and aquaculture in China. In the previous study, we treated the embryos at 16-22 somite stage at 4 °C, -25.7 °C, -140 °C and -196 °C, and successfully obtained surviving embryos in each group. To better understand the molecular changes affected by the low temperatures, we conducted a comparative transcriptome analysis among embryos exposed at 4 °C for 30 min, embryos exposed at -25.7 °C for 30 min and the control group. qPCR assays were conducted for the validation. Signal transduction pathways were highly enriched for the differentially expressed genes. c-Fos, c-Jun, JunD, GADD45, involved in MAPK signaling pathway, were upregulated when embryos were treated at low temperatures. As immediate early genes, Egr-1a and b, and IER2, that respond quickly to the environment stress, their expression increased as well. Hsp70 showed similar expression pattern as immediate early genes. Meanwhile, transcription factors Sox, HES, TFIID, muscle movement and protein synthesis-related genes were downregulated. Taken together, our findings suggest that cooling disrupts gene expression patterns in E. moara embryos. The differentially expressed genes may be involved in cellular resistance against low temperatures, possibly through neural activation, apoptosis, proliferation, differentiation, cellular recovery and heat shock regulation. This study also provides transcriptome dataset of E. moara embryos exposed to cold temperatures for future studies focusing on the molecular effects of cryopreservation.
Competing Interests: Declaration of competing interest The authors declare that they have no conflict of interest.
(Copyright © 2020 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: