Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Screening of key miRNAs related with the differentiation of subcutaneous adipocytes and the validation of miR-133a-3p functional significance in goats

  • Xin, Li (Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Protection and Utilization of Ministry of Education/Sichuan Province, Southwest Minzu University) ;
  • Hao, Zhang (Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Protection and Utilization of Ministry of Education/Sichuan Province, Southwest Minzu University) ;
  • Yong, Wang (Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Protection and Utilization of Ministry of Education/Sichuan Province, Southwest Minzu University) ;
  • Yanyan, Li (Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Protection and Utilization of Ministry of Education/Sichuan Province, Southwest Minzu University) ;
  • Youli, Wang (Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Protection and Utilization of Ministry of Education/Sichuan Province, Southwest Minzu University) ;
  • Jiangjiang, Zhu (Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Protection and Utilization of Ministry of Education/Sichuan Province, Southwest Minzu University) ;
  • Yaqiu, Lin (Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Protection and Utilization of Ministry of Education/Sichuan Province, Southwest Minzu University)
  • Received : 2022.03.25
  • Accepted : 2022.06.03
  • Published : 2023.01.01
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Abstract

Objective: Adipocyte differentiation is regulated by a variety of functional genes and noncoding RNAs. However, the role of miRNAs in lipid deposition of goat white adipose tissue is still unclear. Therefore, this study revealed the miRNA expression profile in goat subcutaneous adipocytes by sRNA-seq. Methods: The miRNA expressed in goat subcutaneous preadipocytes and the mature adipocytes were sequenced by sRNA-seq. The differentially expressed miRNAs (DEm) were screened and gene ontology (GO) and Kyoto encyclopedia for genes and genomes (KEGG) analyses were performed. Gain-of-function and loss-of-function combined with oil red O staining, Bodipy staining, and quantitative reverse-transcription polymerase chain reaction (qPCR) were utilized to determine the effect of miR-133a-3p on adipocyte differentiation. Results: A total of 218 DEm were screened out. The target genes of these DEm were significantly enriched in GO items such as biological regulation and in KEGG terms such as FAK signaling pathway and MAPK signaling pathway. qPCR verified that the expression trend of miRNA was consistent with miRNA-seq. The gain-of-function or loss-of-function of miR-133a-3p showed that it promoted or inhibited the accumulation of lipid droplets, and CCAAT enhancer binding protein α (C/EBPα) and C/EBPβ were extremely significantly up-regulated or down-regulated respectively (p<0.01), the loss-of-function also led to a significant down-regulation of peroxisome proliferator activated receptor gamma (PPARγ) (p<0.01). Conclusion: This study successfully identified miRNAs expression patterns in goat subcutaneous adipocytes, and functional identification indicates that miR-133a-3p is a positive regulator of the differentiation process of goat subcutaneous adipocytes. Our results lay the foundation for the molecular mechanism of lipid deposition in meat-source goats from the perspective of miRNA.

Keywords

Acknowledgement

We want to affectionately thank Prof. Bai Wenlin for his assistance in the revision of this article.

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