Frontiers in Cell and Developmental Biology (May 2022)

Transcriptomic Analysis Provides Insights to Reveal the bmp6 Function Related to the Development of Intermuscular Bones in Zebrafish

  • Huan Xu,
  • Huan Xu,
  • Huan Xu,
  • Huan Xu,
  • Guangxiang Tong,
  • Guangxiang Tong,
  • Guangxiang Tong,
  • Ting Yan,
  • Ting Yan,
  • Ting Yan,
  • Le Dong,
  • Le Dong,
  • Xiaoxing Yang,
  • Xiaoxing Yang,
  • Dongyu Dou,
  • Zhipeng Sun,
  • Zhipeng Sun,
  • Zhipeng Sun,
  • Tianqi Liu,
  • Tianqi Liu,
  • Tianqi Liu,
  • Xianhu Zheng,
  • Xianhu Zheng,
  • Xianhu Zheng,
  • Jian Yang,
  • Xiaowen Sun,
  • Xiaowen Sun,
  • Xiaowen Sun,
  • Yi Zhou,
  • Youyi Kuang,
  • Youyi Kuang,
  • Youyi Kuang

DOI
https://doi.org/10.3389/fcell.2022.821471
Journal volume & issue
Vol. 10

Abstract

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Intermuscular bones (IBs) are small, hard-boned spicules located in the muscle tissue that mainly exist in the myosepta of lower teleosts, which hurt the edibleness and economic value of fish. The study of the development of IBs is very important for freshwater aquaculture fish, but the molecular mechanism of its formation and the key regulatory genes remain unclear. In this study, we first constructed two types of zebrafish mutants (the mutants losing IBs and the mutants with partial deletion of IBs) by knocking out bmp6. We then carried out a transcriptomic analysis to reveal the role of bmp6 in the developmental mechanism of IBs; we used the caudal musculoskeletal tissues of these mutants and wild-type zebrafish at three development stages (20, 45, and 60 dph) to perform transcriptomic analysis. The results showed that the deficiency of bmp6 upregulated sik1 and activated the TNF-A signaling via the NF-KB pathway, which inhibited the development of osteoblasts and promoted osteoclast formation, thereby inhibiting the formation of IBs. These results provided insights to understand the role of bmp6 in the development of IBs in zebrafish and are useful for selective breeding of IBs in cyprinids.

Keywords