hGCGR/hGLP1R 双靶点人源化小鼠:代谢疾病候选药物体内评价的模型工具


胰高血糖素样肽-1 受体(glucagon-like peptide-1 receptor,GLP-1R)与胰高血糖素受体(glucagon receptor,GCGR)是能量代谢调控中的两个重要靶点。近年来,同时激动 GLP-1R 与 GCGR 的双靶点候选药物(如 Cotadutide)在减重、改善血糖与肝脏代谢方面受到关注。这类候选药物针对的是人源靶点,在普通小鼠体内因种属差异难以有效评价其活性,需要在表达人源靶点的人源化小鼠上进行体内药效验证,人源化小鼠模型已成为这类双靶点药物研发中常用的小鼠模型。

该品系由hGCGR 人源化小鼠与 hGLP1R 人源化小鼠杂交获得,在两个基因位点上同时表达人源 GCGR 与人源 GLP-1R。


Body weight change of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide
Fig.1 Body weight change of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide.

 

 Food intakechange of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide
Fig.2 Food intakechange of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide


Fat mass and lean mass changes of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide
Fig.3 Fat mass and lean mass changes of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide


Liver triglyceride and cholesterol content of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide.
Fig.4 Liver triglyceride and cholesterol content of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide.

 

Blood glucose levels of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide
Fig.5 Blood glucose levels of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide. 


 

Serum insulin levels of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide.
Fig.6 Serum insulin levels of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide.


White adipose tissue weight of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide
Fig.7 White adipose tissue weight of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide.

 

Brown adipose tissue weight of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide
Fig.8 Brown adipose tissue weight of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide. 


Muscle weights of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide
Fig.9 Muscle weights of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide.

 

Oxygen consumption of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide
Fig.10 Oxygen consumption of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide.


Carbon dioxide production of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide
Fig.11 Carbon dioxide production of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide.

 

Respiratory exchange ratio of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide.
Fig.12  Respiratory exchange ratio of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide.

 

Heat production of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide
Fig.13 Heat production of HFD-induced hGCGR/hGLP1R obese mice treated with Cotadutide.

官网产品页以Cotadutide 为工具药物,在高脂饮食诱导的肥胖模型上验证了该品系的体内药效响应。结果显示,Cotadutide 处理可显著降低肥胖小鼠的体重(图1)与摄食量(图2);在身体组成方面,脂肪与瘦体重均出现下降,而瘦体重占体重的比例有所升高(图3)。肝脏指标方面,肝脏总胆固醇显著下降,肝脏甘油三酯在各组间无显著差异(图4)。代谢指标方面,Cotadutide 处理可显著降低血糖并改善糖耐量(图5),同时降低血清胰岛素水平(图6)。脂肪组织方面,附睾、腹股沟与肠系膜白色脂肪组织的重量均降低(图7),棕色脂肪组织重量亦降低(图8);而胫骨前肌与腓肠肌的重量占体重比例则有所升高(图9)。能量代谢方面,Cotadutide 处理可显著升高耗氧量(图10)、二氧化碳产生量(图11)、呼吸交换率(图12)与产热(图13)。

上述数据表明,该品系能够对同时作用于GLP-1R 与 GCGR 的候选药物产生相应的体内药效响应,可用于此类双靶点候选药物的减重、血糖与代谢改善效果的体内评价。

该品系由南模生物研发,目录号NM-HU-233747。如需了解该品系的更多信息,可访问南模生物官网(www.modelorg.com)查询。

hGCGR/hGLP1R 双靶点人源化小鼠能评价哪些药效指标?

hGCGR/hGLP1R 双靶点人源化小鼠(目录号 NM-HU-233747)可同时表达人源 GCGR 与人源 GLP-1R。官网以 Cotadutide 为工具药物验证了该模型的药效响应,可评价候选药物对体重、摄食量、血糖、糖耐量、血清胰岛素、肝脏脂质及能量代谢的影响,适合双靶点降糖减重药物的体内药效评价。

关于南模生物

上海南方模式生物科技股份有限公司(Shanghai Model Organisms Center, Inc.,简称"南模生物"),成立于 2000 年 9 月,是上交所科创板上市高科技生物公司(股票代码:688265),专注于模式生物领域,为高校、科研院所及制药企业提供基因修饰动物模型产品与解决方案。咨询电话 400-728-0660。



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