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Thermal behavior of a lipid-protein membrane model and the effects produced by anesthetics and neurotransmitters.
Biochimica et Biophysica Acta (BBA) - Biomembranes ( IF 2.8 ) Pub Date : 2019-11-04 , DOI: 10.1016/j.bbamem.2019.183099
Rosendo Pérez-Isidoro 1 , J C Ruiz-Suárez 2
Affiliation  

Despite decades of intense research to understand the phenomenon of anesthesia and its membrane-related changes in neural transmission, where lipids and proteins have been proposed as primary targets of anesthetics, the involved action mechanisms remain unclear. Based on the overall agreement that anesthetics and neurotransmitters induce particular modifications in the plasma membrane of neurons, triggering specific responses and changes in their energetic states, we present here a thermal study to investigate membrane effects in a lipid-protein model made of 1,2-dimyristoyl-sn-glycero-3-phosphocholine and albumin from chicken egg white under the influence of neurotransmitters and anesthetics. First, we observe how ovalbumin, ovotransferrin, and lysozyme (main albumin constituents from chicken egg white) interact with the lipid membrane enhancing their lipophilic character while exposing their hydrophobic domains. This produces a lipid separation and a more ordered hybrid lipid-protein assembly. Second, we measured the thermotropic changes of this assembly induced by acetylcholine, γ-aminobutiric acid, tetracaine, and pentobarbital. Although the protein in our study is not a receptor, our results are striking, for they give evidence of the great importance of non-specific interactions in the anesthesia mechanism.

中文翻译:

脂蛋白膜模型的热行为以及麻醉药和神经递质产生的作用。

尽管进行了数十年的深入研究以了解麻醉现象及其在神经传导中与膜有关的变化,其中脂类和蛋白质已被提议作为麻醉剂的主要靶标,但所涉及的作用机制仍不清楚。基于麻醉剂和神经递质诱导神经元质膜发生特定修饰,触发特定反应和其能量状态变化的总体共识,我们在此进行热研究,以研究由1,2制成的脂蛋白模型中的膜作用神经递质和麻醉剂作用下鸡卵清中的β-二肉豆蔻酰基-sn-甘油-3-磷酸胆碱和白蛋白。首先,我们观察卵清蛋白,卵转铁蛋白,溶菌酶(来自鸡蛋白的主要白蛋白成分)与脂质膜相互作用,增强了它们的亲脂性,同时暴露了它们的疏水结构域。这产生脂质分离和更有序的杂种脂质-蛋白质组装。其次,我们测量了由乙酰胆碱,γ-氨基丁酸,丁卡因和戊巴比妥引起的该组装体的热致变化。尽管我们研究中的蛋白质不是受体,但我们的结果令人惊讶,因为它们提供了非特异性相互作用在麻醉机制中的重要意义的证据。和戊巴比妥。尽管我们研究中的蛋白质不是受体,但我们的结果令人惊讶,因为它们提供了非特异性相互作用在麻醉机制中的重要意义的证据。和戊巴比妥。尽管我们研究中的蛋白质不是受体,但我们的结果令人惊讶,因为它们提供了非特异性相互作用在麻醉机制中的重要意义的证据。
更新日期:2019-11-05
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