铝对原代培养神经细胞线粒体氧化功能的损伤

目的通过测定不同浓度铝对原代培养的神经细胞线粒体的氧化功能的损伤以探讨铝神经毒作用的可能机理。方法采用原代培养的神经细胞,以不同浓度进行体外三氯化铝染毒,测定细胞的死亡率、线粒体酶活力、线粒体活性氧含量和线粒体膜电位,衡量铝对线粒体氧化功能的损伤。结果随着三氯化铝体外染毒剂量(0μmolL、50μmolL、100μmolL、500μmolL)的增加,细胞的死亡率分别为(10.53%、11.99%、12.03%、25.00%)、线粒体酶活力分别为0.56、0.47、0.42和0.32、线粒体活性氧含量分别为17.12、19.71、29.67和45.46、线粒体膜电位分别为8.03、8.02、4.69和3.01。结论铝对大鼠皮层神经细胞线粒体氧化功能的损伤是其毒作用机制之一。

Study on oxidative function injury of Al exposure on primary cultured neuron mitochondria

OBJECTIVE: To study the possible mechanism of Al neurotoxicity, we evaluated the oxidative function injury of mitochondria in the primary cultured neurons that were exposed to various concentrations of AlCl3. METHODS: Neurons from newborn SD rats were primarily cultured. Then they were exposed to AlCl3 of 0 micromol/L, 50 micromol/L, 100 micromol/L, and 500 micromol/L. The neuron death rate, mitochondria enzyme activity, mitochondria reactive oxygen species (ROS) and mitochondria membrane potential (MMP) were tested then. RESULTS: When the concentration of AlCl3 increased (0 micromol/L, 50 micromol/L, 100 micromol/L, 500 micromol/L), the death rate increased (10.53%, 11.99%, 12.03%, 25.00%), mitochondria enzyme activity decreased (0.56, 0.47, 0.42, 0.32), ROS increased (17.12, 19.71, 29.67, 45.46) and MMP decreased(8.03, 8.02, 4.69, 3.01). CONCLUSION: Al exposure could cause mitochondria oxidative function injury in the primarily cultured rats, which may be the one of the possible mechanism of Al toxicity.