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首页> 外文期刊>Brain research >Modulation by acute stress of chloride permeation across microdissected vestibular neurons membranes: different results in two rabbit strains and CRF involvement.
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Modulation by acute stress of chloride permeation across microdissected vestibular neurons membranes: different results in two rabbit strains and CRF involvement.

机译:急性应力对氯离子在微解剖的前庭神经元膜上的渗透的调节:两种兔毒株和CRF受累的结果不同。

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摘要

Free hand isolation of adult rabbit vestibular Deiters' neurons and dissection of their single membranes allows the study of their ionic permeability characteristics in a microchambers device. In the case of hare-like rabbits, the dissection of such membranes presents evidence of a high basal permeation of labelled chloride, possibly related to mechanical disturbance of the plasma membrane-related cytoskeleton and activation of chloride channels. This did not apply to the laboratory strain of white New Zealand rabbits. However, membranes from hare-like rabbits which were stressed by being rotated on a platform before the experiment, behaved like those from the New Zealand strain. Vice versa, habituation to handling day after day of New Zealand rabbits resulted in a chloride permeation equal to that of unstressed hare-like rabbits. We propose that the stressful conditions result in the release of neurochemical messages to the vestibular Deiters' cells which influence their electrophysiological behavior. The corticotropin releasing factor (CRF), a stress-related peptide present in the climbing fibers, actually blocks the basal chloride permeation across the Deiters' membranes and this effect is partially reversed by its receptor antagonist, alpha-helical CRF [9-41].
机译:徒手隔离成年兔前庭Deiters神经元并解剖其单层膜,可在微腔室装置中研究其离子渗透性特征。在野兔状兔子的情况下,这种膜的解剖表现出标记的氯化物的高基础渗透的证据,这可能与质膜相关的细胞骨架的机械干扰和氯化物通道的激活有关。这不适用于新西兰白兔的实验室菌株。然而,实验前在平台上旋转的兔子状兔子的膜表现得像来自新西兰菌株的膜。反之亦然,习惯于日复一日地处理兔子的新西兰兔子,其氯化物渗透率与未受压力的野兔状兔子相同。我们认为,压力条件导致神经化学信息释放到前庭Deiters细胞,从而影响其电生理行为。促肾上腺皮质激素释放因子(CRF)是存在于攀岩纤维中的一种与压力有关的肽,实际上可以阻止基底氯化物透过Deiters膜渗透,这种作用被其受体拮抗剂α-螺旋CRF所部分逆转[9-41] 。

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