昭通绒鼠夏冬季节体重和产热特征的变化  

Variations of Body Mass and Thermogenesis Properties in Chaotung Vole(Eothenomys olitor)Between Summer and Winter

作　　者：杨押佐 贾婷 张浩 王政昆 朱万龙 YANG Yazuo;JIA Ting;ZHANG Hao;WANG Zhengkun;ZHU Wanlong(Key Laboratory of Ecological Adaptive Evolution and Conservation on Animals-Plants in Southwest Mountain Ecosystem of Yunnan Province Higher Institutes College,School of Life Sciences,Yunnan Normal University,Engineering Research Center of Sustainable Development and Utilization of Biomass Energy Ministry of Education,Key Laboratory of Yunnan Province for Biomass Energy and Environment Biotechnology,Kunming,650500,China;Yunnan College of Business Management,Kunming,650106,China)

机构地区：[1]云南省高校西南山地生态系统动植物生态适应进化及保护重点试验室,云南师范大学生命科学学院,生物能源持续开发利用教育部工程研究中心,云南省生物质能与环境生物技术重点试验室,昆明650500 [2]云南经济管理学院,昆明650106

出　　处：《野生动物学报》2021年第3期718-724,共7页CHINESE JOURNAL OF WILDLIFE

基　　金：国家自然科学基金项目(31760118);云南省中青年学术和技术带头人后备人才项目(2019HB013);云南省万人计划青年拔尖人才项目(YNWR-QNRC-2019-047)。

摘　　要：为探究昭通绒鼠(Eothenomys olitor)体重和产热特征的季节性变化,对其夏季和冬季的体重、体脂重量、摄食量、静止代谢率(RMR)、非颤抖性产热(NST)、血清瘦素质量浓度、内脏器官和消化道重量、肝脏和褐色脂肪组织(BAT)中的生化指标以及下丘脑神经肽Y(NPY)、刺鼠相关蛋白(AgRP)、阿片促黑色素原(POMC)和可卡因-安他非明转录调节肽(CART)基因表达量进行测定。结果显示:昭通绒鼠夏冬两季体重差异不显著,但体脂重量夏季较高,冬季较低;摄食量、RMR和NST均是冬季高于夏季;血清瘦素质量浓度的季节性变化与体脂重量变化相似;除肺重、盲肠重和大肠重季节间差异不显著外,其余身体组成和消化道重量均出现季节性差异,冬季重量显著增加;肝脏和BAT中的生化指标均是冬季高于夏季;NPY、AgRP表达量冬季高于夏季,POMC和CART表达量夏季高于冬季。综上表明,昭通绒鼠的体重在夏冬季符合“调定点假说”,在冬季主要通过降低体脂重量,增加摄食量、代谢产热以及内脏器官重量来适应季节环境的变化。We investigated seasonal variations of body mass and thermogenesis properties in Chaotung vole(Eothenomys olitor)by quantifying body mass,body fat mass,food intake,resting metabolic rate(RMR),non-shivering thermogenesis(NST),serum leptin levels,internal organs and digestive tract mass,biochemical indexes of liver and brown adipose tissue(BAT),gene expression of hypothalamic neuropeptide Y(NPY),agouti related peptide(AgRP),pro-opiomelanocortin(POMC),Cocaine and amphetamine regulated transcript peptide(CART)were measured between summer and winter.The results showed that body mass did not differ between summer and winter,but body fat mass was higher in summer.Food intake,RMR and NST were higher in winter.Difference of serum leptin levels between seasons was similar to that of body fat mass.Except for lung mass,cecum mass,and large intestine mass,the mass of other organs and digestive tract increased significantly in winter.Biochemical indexes of liver and BAT were higher in winter.The expressions of NPY and AgRP were higher in winter,while POMC and CART expressions were higher in summer.All of the above results suggested that body mass of E.olitor supported the“set-point hypothesis”,and it adapted to the variations of seasonal environment mainly by reducing body fat mass,increasing food intake,metabolic thermogenesis and internal organs mass in winter.

关 键 词：昭通绒鼠 体重 产热 季节性变化 

分 类 号：Q955[生物学—动物学] Q958