The oil spill in ageing Bruch membrane.

The oil spill in ageing Bruch membrane.
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DOI:
10.1136/bjophthalmol-2011-300344
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发表时间:
2011-12
期刊:
The British journal of ophthalmology
影响因子:
--
通讯作者:
Huang JD
Huang JD
中科院分区:
其他
文献类型:
--
作者:
Curcio CA;Johnson M;Rudolf M;Huang JD

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衰老是老年性黄斑变性(AMD)的最大危险因素,而软性结节和基底线状沉积物是AMD特有的富含脂质的细胞外病变。油红O结合中性脂代表了Bruch膜(BrM)中与年龄相关的主要沉积,也是第一个确定的druse成分。在这些开创性的观察几十年后,中性脂质沉积的自然史已被阐明,并提出了生化模型。通过多种生化、组织化学和超微结构方法获得的结果,以及流行病学的间接支持,表明RPE分泌载脂蛋白B (apoB)-一种不寻常成分的脂蛋白颗粒进入BrM,随着年龄的增长,它们在那里积累,最终形成脂质壁,这是基础线性沉积的前兆。作者提出,这些病变的成分与活性氧相互作用,形成促炎过氧化脂质,引发新生血管。在这里,作者总结了支持BrM脂蛋白积累导致病变形成和RPE产生脂蛋白的关键证据。作者更新了他们的模型,将AMD与血浆高密度脂蛋白代谢相关的基因之间的遗传关联,并提出了基于石油泄漏类比的未来研究方向和治疗策略。
Ageing is the largest risk factor for age-related macular degeneration (AMD), and soft drusen and basal linear deposits are lipid-rich extracellular lesions specific to AMD. Oil red O binding neutral lipid represents a major age-related deposition in the Bruch membrane (BrM) and the first identified druse component. Decades after these seminal observations, a natural history of neutral lipid deposition has been articulated and a biochemical model proposed. Results obtained with multiple biochemical, histochemical, and ultrastructural methods, and supported indirectly by epidemiology, suggest that the RPE secretes apolipoprotein B (apoB)-lipoprotein particles of unusual composition into BrM, where they accumulate with age eventually forming a lipid wall, a precursor of basal linear deposit. The authors propose that constituents of these lesions interact with reactive oxygen species to form pro-inflammatory peroxidised lipids that elicit neovascularisation. Here, the authors summarise key evidence supporting both accumulation of BrM lipoproteins leading to lesion formation and lipoprotein production by the RPE. The authors update their model with genetic associations between AMD and genes historically associated with plasma HDL metabolism, and suggest future directions for research and therapeutic strategies based on an oil-spill analogy.
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