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Cr(Ⅲ)暴露对黑腹果蝇发育的毒性效应分析

翁一健 罗苗苗 吴棋芳 佟海滨*

温州大学生命与环境科学学院

摘要(Abstract):

本研究针对三价铬(Cr 3+)长期低剂量暴露对生物体发育及代谢网络的慢性损伤机制尚不明确的问题,选用黑腹果蝇(Drosophila melanogaster)作为模式生物,评估了三价铬离子(Cr 3+)对果蝇发育进程、运动行为及糖脂代谢的潜在毒性效应。实验组果蝇饲喂含4 mM Cr 3+的培养基,监测幼虫至成虫各阶段的蛹化率、羽化率、体重变化及运动能力,并定量分析三龄幼虫体内葡萄糖(Glucose)和甘油三酯(TG)水平。Cr 3+暴露导致幼虫发育周期显著延长,蛹化率和羽化率降低,蛹期和成虫个体平均重量减少、体积缩小,雌雄果蝇的垂直攀爬能力减弱。三龄幼虫葡萄糖和三酰甘油含量较对照组降低。Cr 3+可能导致活性氧(ROS)过度累积触发氧化应激级联反应,关键代谢酶活性受抑,最终引发糖脂代谢网络失衡。


关键词(KeyWords):

三价铬;黑腹果蝇;生长发育;糖脂代谢;氧化应激


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