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Study of effects of copper deficiency on internal organ through a copper deficiency model in rat
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF PREVENTIVE MEDICINE
- Issue:
- z1
- DOI:
- 10.3760/j:issn:0253-9624.2007.z1.032
- Key Word:
- 大鼠;铜;模型,动物
Abstract： 目的 建立大鼠缺铜模型,并考察缺铜对大鼠重要脏器的损伤.方法 选用27只5周龄断奶SD雄性大鼠,按体重随机分为3组(3×9),对照组1、对照组2和铜缺乏组(CuD),进行为期6周的饲养实验.对照组1饲喂铜含量为7.0 mg/kg的商品饲料,对照组2和缺铜组大鼠饲喂铜含量为0.73 mg/kg半纯合基础饲料;每天下午分别按体重的1%灌喂铜含量为0(对照组1),1.33(对照组2)和0 mg/ml(CuD)的硫酸铜溶液,因此对照组2摄入的饲料中理论铜水平为11.37 mg/,kg.所有大鼠均自由采食和自由饮用去离子水.在实验末处死所有大鼠,采集其血液和内脏样品,用于测定血浆铜蓝蛋白酶的含量(PPD值)及其活力(:PCP),红细胞Cu-Zn SOD酶活力(EC Cu-Zn SOD),肝脏铜(LC)和金属硫蛋白(LMT)含量.光学显微镜下观察大鼠肾脏、脑、心脏、肝脏、脾脏、肺、睾丸等内脏组织病理学变化.结果 缺铜组大鼠的血浆PCP、PPD值、LC、LMT和EC Cu-Zn SOD都极显著低于对照组1和对照组2(EC Cu-Zn SOD除外);缺铜组部分大鼠的心肌纤维断裂,小灶性嗜酸性变,冠状动脉分支内皮细胞增生肿胀,内皮下间隙增宽,肺小动脉肌层肥厚,管腔狭窄闭塞,其余内脏没有观察到明显病变.结论 断乳大鼠经过饲喂低铜饲料6周即可成功地建立缺铜模型,缺铜组少数大鼠心肌及小动脉可见轻度异常病理学改变.
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