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The influence of NO-containing ruthenium complexes on mouse hippocampal evoked potentials in vitro.

机译:含NO的钌配合物对小鼠海马诱发电位的影响。

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The influence of different, nitric oxide-containing ruthenium complexes on the evoked potentials recorded from the CA1 region of the mouse hippocampus in vitro has been investigated. Of the compounds tested, only trans-[(NO)(P(OEt)3)(NH3)4Ru](PF6)3 (1-2.5 mM) exerted a strong facilitatory action on the population spike, the EPSP, and the spontaneous activity. Its activity probably depends upon its ability to release NO following reduction. The phosphito ligand is important both in terms of adjusting the reduction potential of the complex to be biologically accessible and in labilizing the coordinated NO. The effects of this compound could not be reversed by perfusion. Scavenging NO in slices preincubated with oxyhemoglobin prior to the addition of this compound eliminated its neurophysiological effects. The control molecules trans-[(P(OEt)3)2(NH3)4Ru](PF6)2, trans-[(H2O)(P(OEt)3) (NH3)4Ru](PF6)3, and [(NO)(NH3)5Ru]Cl3, which are structurally similar, but unable to generate NO, were ineffective. NaNO2 suppressed neuronal firing. Attempts to induce Long-Term Potentiation (LTP) at the time of maximal effect of trans-[(NO)(P(OEt)3)(NH3)4Ru](PF6)3 were unsuccessful, suggesting that the mechanism of amplification induced by trans-[(NO)(P(OEt)3)(NH3)4Ru](PF6)3 and LTP may share common pathways.
机译:已经研究了不同的含一氧化氮的钌配合物对小鼠海马CA1区记录的诱发电位的影响。在测试的化合物中,只有反式[[(NO)(P(OEt)3)(NH3)4Ru](PF6)3(1-2.5 mM)对种群峰值,EPSP和自发产生强大的促进作用活动。它的活性可能取决于还原后释放NO的能力。磷酸配体在调节复合物的还原潜力使其可生物利用以及使配位NO呈标签上均重要。灌注不能逆转该化合物的作用。在加入这种化合物之前,先用氧合血红蛋白预孵育的切片清除NO,消除了其神经生理作用。控制分子反式-[((P(OEt)3)2(NH3)4Ru](PF6)2,反式-[(H2O)(P(OEt)3)(NH3)4Ru](PF6)3和[[在结构上相似但不能产生NO的NO)(NH3)5Ru] Cl3无效。 NaNO 2抑制神经元放电。反式[(NO)(P(OEt)3)(NH3)4Ru](PF6)3发挥最大作用时,诱导长期增强(LTP)的尝试未成功,这提示反式-[(NO)(P(OEt)3)(NH3)4Ru](PF6)3和LTP可能共有共同的途径。

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