唇䱻twist1和twist2基因克隆及其在肌间刺骨化过程中的表达
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浙江省自然科学基金(Y3110477);丽水市高层次人才培养资助项目(2018RC01)


Molecular characterization of two twist genes in barbel steed (Hemibarbus labeo) and their relationship with intermuscular bone development
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The Zhejiang Provincial Natural Science Foundation of China (Y3110477); Research Project of Lishui Science and Technology Bureau (2018RC01)

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    摘要:

    在脊椎动物中存在着2种twist基因,即twist1和twist2,二者对骨骼的发育具有调控作用。为探究唇䱻twist1和twist2与肌间刺骨化的相关性,实验克隆得到了唇䱻twist1和twist2基因cDNA序列。氨基酸序列比对结果显示,唇䱻TWIST1和TWIST2与其他鱼类保守性较高,都具有螺旋-环-螺旋(HLH)结构域和色氨酸-精氨酸(WR)结构域。系统进化树分析表明,唇䱻TWIST1和TWIST2与斑马鱼亲缘关系最为接近。通过荧光定量PCR检测发现唇䱻twist1和twist2基因在所有被检测的组织中均有表达,twist1在脑中的表达量最高,心脏中次之,在脾脏中表达量最低。twist2在皮肤和鳃中的表达量较高,在脾脏中的表达量最低。此外,twist1和twist2基因的表达量在肌间刺骨化的4个关键阶段发生显著变化。研究表明,twist基因与肌间刺骨化有一定的相关性。本研究首次在经济鱼类中克隆得到了twist基因,并揭示了twist基因与肌间刺骨化的相关性。研究结果将为进一步调查鱼类twist基因功能以及肌间刺形成的分子机制提供基础数据。

    Abstract:

    There are two twist genes in vertebrates, namely twist1 and twist2, which have a regulatory effect on bone development. To explore the relationship between twist1, 2 and intermuscular bone development in barbel steed (Hemibarbus labeo), cDNAs of the twist1 and twist2 genes of H. labeo were cloned and sequenced. Sequence analysis revealed that H. labeo TWIST1 and TWIST2 were conserved in most of the teleosts, and they all had a helix-loop-helix (HLH) domain and a tryptophan-arginine (WR) domain. Phylogenetic tree analysis indicated that H. labeo twist1 and twist2 were closely related to that of zebrafish (Danio rerio). Expression of twist1 and twist2 transcripts were detected in all the tested tissues. twist1 was the highestly expressed in the brain, followed by the heart, and the lowest in the spleen. twist2 had higher expression levels in skin and gill, and the lowest expression in spleen. The transcript levels of the twist1 and twist2 gene significantly changed during the four developmental stages of intermuscular bone development, suggesting that there is a certain correlation between twist genes and intermuscular bone development. This study, for the first time, cloned the twist genes in economic fish and revealed the correlation between twist genes and intermuscular bone development. The results will provide basic data for further investigation of twist gene function and its regulation role in intermuscular bone development.

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陈洁,吕耀平,戴庆敏,张乐,杨露莹.唇䱻twist1和twist2基因克隆及其在肌间刺骨化过程中的表达[J].水产学报,2021,45(4):489~496

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  • 收稿日期:2019-09-22
  • 最后修改日期:2020-05-23
  • 录用日期:2020-05-25
  • 在线发布日期: 2021-04-12
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