首页> 外文期刊>Life sciences >Intrahippocampal injection of paraquat produces apoptotic cell death which is prevented by the lazaroid U74389G, in rats.
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Intrahippocampal injection of paraquat produces apoptotic cell death which is prevented by the lazaroid U74389G, in rats.

机译:海马海藻内注射百草枯可导致大鼠凋亡细胞死亡,这可通过Lazaroid U74389G预防。

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摘要

Injection of paraquat, a redox-cycling compound, into the rat hippocampus produces limbic seizures and hippocampal damage. Here we report that a proportion of the neuronal cell death caused by the herbicide occurs via an apoptotic mechanism which appears to be mediated by oxygen free radicals. Adult male Wistar rats (n=12) received a single dose of paraquat (25 nmol/0.5 microl; 0.5 microl/min rate) and were sacrificed 24 h later. Paraquat caused DNA fragmentation, nuclear chromatin marginalization and compaction in all hippocampal subsectors, 24 h after its injection, as revealed by both the TUNEL procedure and hematoxylin eosin staining of coronal brain tissue sections. Pre-treatment with the free radical scavenger lazaroid U74389G (30 mg/kg given i.p. 30 min beforehand) significantly reduced paraquat-induced apoptosis, but did not protect against non apoptotic neuronal cell loss caused by the herbicide.
机译:向大鼠海马中注射百草枯(一种氧化还原循环化合物)会导致边缘性癫痫发作和海马损伤。在这里我们报告由除草剂引起的神经元细胞死亡的一部分是通过凋亡机制发生的,该机制似乎是由氧自由基介导的。成年雄性Wistar大鼠(n = 12)接受单剂百草枯(25nmol / 0.5微升; 0.5微升/分钟的速率),并在24小时后处死。 TUNEL程序和苏木精伊红对冠状脑组织切片的染色均显示,百草枯注射后24 h在所有海马亚区引起DNA片段化,核染色质边缘化和紧实。用自由基清除剂lazaroid U74389G(30 mg / kg预先在腹腔内给予30分钟)预处理可显着降低百草枯诱导的细胞凋亡,但不能防止由除草剂引起的非凋亡神经元细胞损失。

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