China Animal Husbandry and Veterinary Medicine ›› 2023, Vol. 50 ›› Issue (9): 3641-3651.doi: 10.16431/j.cnki.1671-7236.2023.09.020

• Genetics and Breeding • Previous Articles     Next Articles

Effect and Molecular Mechanism of Zbed6 Gene Knockout on the Growth and Development of Skeletal Muscle in Mice

LIU Ling1,2, WANG Shengnan2, WANG Dandan2, MA Yuehui2, JIANG Lin2, CUI Kai1   

  1. 1. College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China;
    2. Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2023-03-14 Online:2023-09-05 Published:2023-08-24

Abstract: 【Objective】 The purpose of this study was to investigate the effect of zinc finger BED domain containing protein 6 (ZBED6) gene knockout on skeletal muscle growth and development in adolescent mice and its molecular mechanism.【Method】 Wild type (WT) and Zbed6 gene knockout (Zbed6-/-) C57BL/6 mice at 8 weeks old were used as experimental subjects.Blood was collected and serum testosterone content was determined by ELISA method.Skeletal muscle tissue was isolated and muscle weight and muscle ratio were recorded.Skeletal muscle fiber area and IGF2 protein expression levels were determined by histological analysis and immunohistochemical analysis.Transcriptome sequencing was performed on WT and Zbed6-/- male and female mice by Illumina NovaseqTM 6000 high-throughput sequencing.Combined with ZBED6 target gene data of mice,the downstream target genes that played a role in Zbed6 gene knockout mouse muscle tissue were screened.Real-time quantitative PCR was used to verify the reliability of differentially expressed genes in transcriptome sequencing.【Result】 Compared with WT mice,muscle weight and muscle ratio of Zbed6-/- male and female mice were extremely significantly increased (P<0.01).After Zbed6 gene knockout,the mRNA expression of Zbed6 gene in skeletal muscle of female and male mice was significantly decreased (P<0.05),and the mRNA and protein expression of IGF2 were significantly or extremely significantly increased (P<0.05 or P<0.01),serum testosterone content was extremely significantly increased (P<0.01).Transcriptome sequencing showed that 38 differentially expressed genes were detected in the skeletal muscle of male mice in Zbed6-/- group,of which 22 genes were up-regulated and 16 genes were down-regulated.49 differentially expressed genes were detected in skeletal muscle of female mice,among which 19 genes were up-regulated and 30 genes were down-regulated.A total of 10 differentially expressed genes were co-expressed in female and male mice,among which Dock3,Lhx2,Brsk2,Caskin1 and Gbe1 were ZBED6 target genes.Real-time quantitative PCR showed that the expression of the 4 differentially expressed genes was consistent with the transcriptome sequencing analysis,which confirmed the accuracy and reliability of the sequencing results.【Conclusion】 Zbed6-/- promoted skeletal muscle growth and increased serum testosterone content in adolescent mice.Five ZBED6 target genes including Dock3, Lhx2,Brsk2,Caskin1 and Gbe1 were screened.The results provided new gene targets and research directions for further exploring the function of ZBED6,contribute to improving the functional map of ZBED6,and provided an important theoretical basis for the improvement of large animal varieties and the genetic breeding of lean meat traits of livestock and poultry.

Key words: zinc finger BED domain containing protein 6; skeletal muscle; growth and development; transcriptome sequencing

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