Phenotypic changes in the metabolic profile and adiponectin activity during seasonal fattening and hibernation in female Daurian ground squirrels(Spermophilus dauricus)  

作　　者：Yue REN Shiyi SONG Xinyu LIU Ming YANG 

机构地区：[1]College of life Sciences,Shenyang Normal University,Shenyang,China

出　　处：《Integrative Zoology》2022年第2期297-310,共14页整合动物学（英文版）

基　　金：This work was financially supported by the National Natural Scientific Foundation of China(Grant No.31670425);National Key Research and Development Program of China(2016YFC0500707);Liaoning Province Science and Technology Plan Project(2017208001).

摘　　要：Seasonal hibernation has provided an opportunity to study animals’phenotypic plasticity in adaptation to changing environment.In the present study focusing on the female Daurian ground squirrel(Spermophilus dauricus)-a well demonstrated seasonal hibernator-we examined their behavioral,morphological,and metabolic changes during fattening,hibernation,and emergence.Our data indicated high levels of food intake,fat deposition,and body mass increases during fattening compared to hibernation.The levels of serum glucose and triglycerides were also higher during fattening than during hibernation and emergence.Interestingly,although squirrels showed signs of obesity and elevated triglycerides in serum during fattening,triglyceride levels in the liver and skeletal muscles remained unchanged.Our data also indicated that adiponectin levels in serum and cerebrospinal fluid were different between fattening and hibernation.Levels of adiponectin receptor 1 in the skeletal muscle remained low during fattening but peaked in late hibernation.In contrast,adiponectin receptor 2 in the liver showed a steady increase during fattening,which was followed by a significant decrease at early hibernation.Our data indicate that adiponectin may play an important role in preventing heterotopic fat accumulation in a receptor-and organ-specific manner,as well as in facilitating the switch from glucose metabolism to lipid metabolism during fattening and hibernation in female Daurian ground squirrels.

关 键 词：ADIPONECTIN FATTENING HIBERNATION liver metabolic adaptation MUSCLE 

分 类 号：Q95[生物学—动物学]