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Anesth Analg:丙泊酚如何调节GABA受体的表面表达

2015-08-21 张森 译 MedSci原创

研究表明,全身麻醉药物丙泊酚可通过增强γ-氨基丁酸受体(GABAAR)的活性产生快速催眠镇静作用。然而,目前有关丙泊酚调节抑制性突触传递的分子机制的研究仍不成熟。本研究旨在探讨丙泊酚在调节GABAARs表面表达中的作用。 研究人员通过腹腔注射对C57BL/6小鼠丙泊酚进行全身麻醉。分离胚胎18天小鼠的海马椎体神经元,并用丙泊酚对其进行处理。使用细胞表面生物素标记、免疫印迹和酶联免疫吸附试验对细胞


研究表明,全身麻醉药物丙泊酚可通过增强γ-氨基丁酸受体(GABAAR)的活性产生快速催眠镇静作用。然而,目前有关丙泊酚调节抑制性突触传递的分子机制的研究仍不成熟。本研究旨在探讨丙泊酚在调节GABAARs表面表达中的作用。

研究人员通过腹腔注射对C57BL/6小鼠丙泊酚进行全身麻醉。分离胚胎18天小鼠的海马椎体神经元,并用丙泊酚对其进行处理。使用细胞表面生物素标记、免疫印迹和酶联免疫吸附试验对细胞膜上的蛋白质进行分析。对急性小鼠脑片中的海马细胞的电生理活动进行记录。通过免疫沉淀法对GABAARs和网格蛋白适配器蛋白2间的相互作用进行评价。通过体外激酶实验显示GABAARs的磷酸化作用。

结果显示,丙泊酚可促进细胞膜中 GABAARβ3亚基的积聚。丙泊酚调节通过蛋白激酶 Cε对GABAARβ3的磷酸化作用进行调节,而蛋白激酶 Cε可阻断GABAARβ3与衔接蛋白2的β-衔接亚基间的相互作用,从而导致了海马椎体神经元中受体内吞作用的抑制。与GABAARs表面水平的增加一致,丙泊酚提高了诱发及微型突触GABA受体电流。



本研究表明:丙泊酚通过影响GABAAR与衔接蛋白复合物AP2 的相互作用,减弱了GABAARs的内吞作用;并为丙泊酚抑制神经元兴奋性的调节机制提供了新的见解。

原始出处:

Yuwen Li,Yin Wu,Ruili Li,Chao Wang,Na Jia,Chao Zhao,Aidong Wen,and Lize Xiong.Propofol Regulates the Surface Expression of GABAA Receptors: Implications in Synaptic Inhibition Anesth Analg. 2015 Aug 3

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    2016-09-15 1e10c84am36(暂无匿称)

    文章不错,值得拜读

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    2015-11-18 AspirantSuo
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    2016-06-07 经常头晕

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