首页> 外文期刊>Biochimica et biophysica acta. Biomembranes >Effect of dietary docosahexaenoic acid on rhodopsin content and packing in photoreceptor cell membranes
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Effect of dietary docosahexaenoic acid on rhodopsin content and packing in photoreceptor cell membranes

机译:膳食二十四六烯酸对光感受器细胞膜罗多蛋白含量和包装的影响

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摘要

Docosahexaenoic acid (DHA) is enriched in photoreceptor cell membranes. DHA deficiency impairs vision due to photoreceptor cell dysfunction, which is caused, at least in part, by reduced activity of rhodopsin, the light receptor that initiates phototransduction. It is unclear how the depletion of membrane DHA impacts the structural properties of rhodopsin and, in turn, its activity. Atomic force microscopy (AFM) was used to assess the impact of DHA deficiency on membrane structure and rhodopsin organization. AFM revealed that signaling impairment in photoreceptor cells is independent of the oligomeric status of rhodopsin and causes adaptations in photoreceptor cells where the content and density of rhodopsin in the membrane is increased. Functional and structural changes caused by DHA deficiency were reversible.
机译:十二碳六烯酸(DHA)富含光感受器细胞膜。 DHA缺乏由于光感受器细胞功能障碍而损害视力,这是至少部分地引起罗多蛋白酶的活性,所述光受体引发光学疏松症。 目前尚不清楚膜DHA的耗尽如何影响罗地甙的结构性质,而且反过来又是其活动。 原子力显微镜(AFM)用于评估DHA缺乏对膜结构和罗地素组织的影响。 AFM揭示了光感受器细胞中的信号损伤与洛月蛋白酶的低聚状态无关,并导致感光体细胞中的适应,其中膜中杂皮蛋白的含量和密度增加。 DHA缺乏造成的功能和结构变化是可逆的。

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