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大鼠BTCe对体外培养胰岛保护作用及对糖尿病大鼠降糖作用的研究

Study of The Effect on Islets Cultured In vitro and STZ-induced Diabetic Rats In vivo of EGF-like Domain of Betacellulin

β细胞素(betacellulin,BTC)是目前较受关注的胰岛再生因子,但其促胰腺、胰岛再生的机制不清.BTCe是betacellulin的功能片段,促细胞增殖能力与BTC相同.实验通过原核表达方法获得BTCe蛋白,MTT法证实其促3T3-L1细胞增殖能力.将BTC或BTCe作用于原代培养的大鼠胰岛,观察其对胰岛分泌的急性及长期影响作用,实时定量PCR及免疫荧光检测胰岛内关键基因的表达.将质粒pcDNA3.1-BTCe注射入链脲霉素(STZ)诱导的糖尿病大鼠肌肉中,观察对大鼠血糖的影响作用.加入BTC或BTCe可明显提高体外培养大鼠胰岛的GSIS水平,但实时定量PCR及免疫荧光显示胰岛内4种关键基因的表达并无明显变化;pcDNA3.1-BTCe转染糖尿病大鼠15~20天后血糖出现下降,糖耐量明显改善;免疫荧光显示:胰腺内有大量PDX-1+的导管细胞及胰岛阳性细胞出现.推测BTC及BTCe对体外长期培养的大鼠胰岛具有一定的保护作用,可能通过促进胰腺内PDX-1+的导管细胞及胰岛素阳性细胞的增殖、导对STZ诱导的糖尿病大鼠的高血糖具有一定缓解作用.

作 者:
李鸿 周伟斌 李凤英 顾燕云 田璟琰 钱镭 张迪 周文中 吴国亭 骆天红 李果 罗敏 LI Hong ZHOU Wei-Bin LI Feng-Ying GU Yan-Yun TIAN Jing-Yan QIAN Lei ZHANG Di ZHOU Wen-Zhong WU Guo-Ting LUO Tian-Hong LI Guo LUO Min  
作者单位:
李鸿,LI Hong(上海市内分泌与代谢病研究所,上海交通大学附属瑞金医院,上海,200025;上海同济大学附属第十人民医院,上海,200072)
周伟斌,李凤英,顾燕云,田璟琰,钱镭,张迪,周文中,骆天红,李果,罗敏,ZHOU Wei-Bin,LI Feng-Ying,GU Yan-Yun,TIAN Jing-Yan,QIAN Lei,ZHANG Di,ZHOU Wen-Zhong,LUO Tian-Hong,LI Guo,LUO Min(上海市内分泌与代谢病研究所,上海交通大学附属瑞金医院,上海,200025)
吴国亭,WU Guo-Ting(上海同济大学附属第十人民医院,上海,200072) 
刊 名:
生物化学与生物物理进展  ISTIC SCI PKU
英文刊名:
PROGRESS IN BIOCHEMISTRY AND BIOPHYSICS 
年,卷(期):
2006 33(12) 
分类号:
R5 
关键词:
betacellulin 知识脉络  克隆 知识脉络  融合蛋白 知识脉络  胰岛 知识脉络  转染 知识脉络  糖尿病 知识脉络 
机标分类号:
R58 R5 
机标关键词:
糖尿病大鼠体外培养大鼠胰岛保护作用降糖作用Diabetic Rats阳性细胞增殖能力荧光显示实时定量导管细胞胰腺大鼠血糖体外长期培养免疫荧光检测细胞的增殖原代培养链脲霉素基因缓解作用 
基金项目:
国家自然科学基金,上海市科委资助项目,同济大学校科研和教改项目,上海市第十人民医院启明星基金 
DOI:
 
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