中文摘要：

目的 探索甘丙肽在药源性高催乳素血症模型大鼠下丘脑部位的分布及作用.方法 利用舒必利腹腔注射的方法建立大鼠高催乳素血症的疾病模型,分别采用免疫荧光组化和western blot的方法,观察模型组和对照组大鼠下丘脑部位甘丙肽和多巴胺的表达及相互作用的差别.结果 模型组和对照组大鼠血清催乳素（PRL）分别为（15.74±2.49） ng,/ml、（10.25±1.29） ng/ml,雌激素（E2）分别为（4.24±0.69）pg/ml、（9.56±3.25） pg/ml,均差异有统计学意义（P＜0.05）.免疫荧光染色显示,模型组大鼠下丘脑部位甘丙肽的表达明显减少,甘丙肽能神经元与多巴胺能神经元的共定位减少.Western blot结果显示,模型组和对照组大鼠下丘脑部位的TH/GAPDH的灰度比值分别为（0.871±0.046）、（0.890±0.054）,均差异无统计学意义（P＞0.05）;模型组和对照组大鼠下丘脑部位GAL/GAPDH的灰度比值分别（0.405±0.112）、（0.985±0.158）,均差异有统计学意义（P＜0.05）.结论 高催乳素血症模型大鼠下丘脑部位的甘丙肽表达减少,并且与多巴胺能神经元共表达减少具有相关性.

英文摘要：

Objective To study the expression and role of galanin in the hypothalamus of rat with the drug-induced hyperprolactinemia.Methods Hyperprolactinemia was induced by daily intraperitoneal injections 50 mg/kg sulpiride solution.The protein in the hypothalamus of rat was extracted to determine the expression levels of galanin with Western Blot.The expression and colocalization of galanin and dopamine in model and control group were observed with immunofluorescence.Results The model group showed a significant increase of serum prolactin （PRL） level and a significant decrease of serum estradiol （E2） level,as compared to the control group （（15.74±2.49） ng/ml vs （10.25±1.29） ng/ml and （4.24±0.69）pg/ml vs （9.56±3.25） pg/ml,respectively,P〈0.05）.Both the expression level of galanin and the number of neurons coexisting with galanin and dopamine were decreased in the hypothalamus of the hyperprolactinemia rat compared with the control group.Western Blot revealed that,compared to the control group,the sulpiride model group had a significant increase of galanin but not TH （0.405±0.112 vs 0.985±0.158,P〈0.05 and 0.871 ± 0.046 vs 0.890±0.054,P〉 0.05,respectively）.Conclusion Galanin expression level has decrease in the hypothalamus of the hyperprolactinemia rat,which contributes to the reduction of dopaminergic neurons.