两种帕金森病大鼠糖脂代谢模型的比较

Comparison of glucose and lipid metabolism in two types of Parkinson's disease rat models

目的筛选合并代谢异常的帕金森病模型,为后续的相关实验研究提供理想的动物模型。方法SD雄性大鼠62只,随机分为损毁前脑内侧束(MFB)模型组、损毁MFB假手术组、损毁纹状体模型组和损毁纹状体假手术组。模型制做成功后进行旋转实验,两组大鼠中分别选出成功模型,并分别对两组成功的PD模型大鼠的摄食、体重、血糖和腹腔内脂肪组织进行检测。观察两组模型大鼠上述代谢指标的变化。结果损毁MFB较损毁纹状体制作帕金森病模型的成功率高(70.97%比38.71%)。与各假手术组大鼠相比,MFB模型大鼠既出现体重明显的减轻[(218.1±13.99)g比(252.7±10.1)g,P<0.05],腹腔注射葡萄糖后15min和30min血糖出现了明显升高,并且肾周白色脂肪组织明显减少(左右两侧)。纹状体模型大鼠仅饮食减少[(13.95±0.25)g比(20.23±0.86)g,P<0.001]和腹腔注射葡萄糖后15min、30min和60min时间点血糖升高。结论损毁MFB的PD模型大鼠无论模型成功率还是代谢相关指标都较损毁纹状体的PD模型更接近糖脂代谢异常的PD患者。

Objective To select an ideal Parkinson ’ s disease （ PD） animal model with metabolic abnormalities for subsequent experimental studies .Methods A total of 62 Sprague-Dawley male rats were randomly divided into four groups：damaged medial forebrain bundle （ MFB） model group, damaged medial forebrain bundle （ MFB） sham group, damaged Striatum model group and damaged Striatum sham group .After detecting the rotation experiment , successful model rats of two groups were selected to detect the changes of food intake , body weight , blood glucose and intra-abdominal adipose tissue.Results It was easier to produce a PD model by destroying MFB than striatum .Compared with sham-operated rats, MFB model rats showed significant abnormality both in reduction of body weight [（218.1 ±13.99） g vs （252.7 ±10.1）g, P〈0.05] and high blood glucose appeared at 15min and 30min after introperitoneal glucose tolerance test （ IPGTT） .Their perirenal white adipose tissue was significantly reduced （ both left and right side ） .Striatum model rats only appeared decreased food intake [（13.95 ±0.25）g vs （20.23 ±0.86）g, P〈0.001] and impaired glucose regulation at 15min, 30min and 60min after IPGTT.Their body weight and adipose tissue did not change significantly .Conclusion No matter in the success rate or metabolism-related indicators , MFB damaged rat model of PD is more suitable to study PD patients with abnormal lipid metabolism compared with Striatum rat model .