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首页> 外文期刊>Journal of Cerebral Blood Flow and Metabolism: Official Journal of the International Society of Cerebral Blood Flow and Metabolism >Intrastriatal neurotoxin injections reduce in vitro and in vivo binding of radiolabeled rotenoids to mitochondrial complex I.
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Intrastriatal neurotoxin injections reduce in vitro and in vivo binding of radiolabeled rotenoids to mitochondrial complex I.

机译:胃部内神经毒素注射减少体外和放射性标记的旋转骨的体内结合到线粒体复合物I.

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摘要

The in vivo and in vitro bindings of radiolabeled rotenoids to mitochondrial complex I of rat striatum were examined after unilateral intrastriatal injections of quinolinic acid or 1-methyl-4-phenylpyridinium salt (MPP+). Quinolinic acid produced significant, similar losses of in vivo binding of [11C]dihydrorotenol ([11C]DHROL: 40%) and in vitro binding of [3H]dihydrorotenone ([3H]DHR: 53%) in the injected striatal at 13 days after the injection of neurotoxin. MPP+ reduced in vivo binding of [11C]DHROL up to-55%) as measured 1.5 to 6 h after its administration. Reductions of in vivo [11C]DHROL binding after either quinolinic acid or MPP+ injections did not correlate with changes in striatal blood flow as measured with [14C]iodoantipyrine. These results are consistent with losses of complex I binding sites for radiolabeled rotenoids, produced using cell death (quinolinic acid) or direct competition for the binding site (MPP+). Appropriately radiolabeled rotenoids may be useful for in vivo imaging studies of changes of complex I in neurodegenerative diseases.
机译:在单侧脑内注射喹啉酸或1-甲基-4-苯基吡啶盐(MPP +)之后,检查放射性标记的旋转骨的体内和体外络合物对大鼠纹状体的线粒体复合物I.喹啉酸产生的显着,在13天内注射纹纹体([3H]二氢酚([11c] Dhrol:40%)和体外结合的体内结合的显着,类似的损失[3H]二氢钨酮([3H] DHR:53%)注射神经毒素后。在其给药后测量1.5至6小时,MPP +减少了[11C] DHROL的体内结合。在喹啉酸或MPP +注射后的体内[11c] dhrol结合的减少与用[14C]碘吡啶测量的纹状体血流的变化不相关。这些结果与用于放射性标记的旋转骨体的复合物I结合位点的损失一致,使用细胞死亡(喹啉酸)或结合位点(MPP +)的直接竞争产生。适当的放射性标记的旋转阀可用于体内成像研究,对神经变性疾病中复合物I的变化的研究。

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