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Distinct and shared endothermic strategies in the heat producing tissues of tuna and other teleosts 被引量:1
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作者 Baosheng Wu Xueli Gao +19 位作者 Mingling Hu Jing Hu Tianming Lan Tingfeng Xue Wenjie Xu Chenglong Zhu Yuan Yuan Jiangmin Zheng Tao Qin Peidong Xin Ye Li Li Gong Chenguang Feng Shunping He Huan Liu Haimeng Li Qing Wang Zhenhua Ma Qiang Qiu Kun Wang 《Science China(Life Sciences)》 SCIE CAS CSCD 2023年第11期2629-2645,共17页
Although most fishes are ectothermic,some,including tuna and billfish,achieve endothermy through specialized heat producing tissues that are modified muscles.How these heat producing tissues evolved,and whether they s... Although most fishes are ectothermic,some,including tuna and billfish,achieve endothermy through specialized heat producing tissues that are modified muscles.How these heat producing tissues evolved,and whether they share convergent molecular mechanisms,remain unresolved.Here,we generated a high-quality genome from the mackerel tuna(Euthynnus affinis)and investigated the heat producing tissues of this fish by single-nucleus and bulk RNA sequencing.Compared with other teleosts,tuna-specific genetic variation is strongly associated with muscle differentiation.Single-nucleus RNA-seq revealed a high proportion of specific slow skeletal muscle cell subtypes in the heat producing tissues of tuna.Marker genes of this cell subtype are associated with the relative sliding of actin and myosin,suggesting that tuna endothermy is mainly based on shivering thermogenesis.In contrast,cross-species transcriptome analysis indicated that endothermy in billfish relies mainly on nonshivering thermogenesis.Nevertheless,the heat producing tissues of the different species do share some tissue-specific genes,including vascular-related and mitochondrial genes.Overall,although tunas and billfishes differ in their thermogenic strategies,they share similar expression patterns in some respects,highlighting the complexity of convergent evolution. 展开更多
关键词 ENDOTHERMY TUNA convergent evolution divergent strategies heat producing tissues
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