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Exp Eye Res:猪体内磷脂玻璃体液中的区域分布研究

2017-06-11 cuiguizhong MedSci原创

美国路易斯维尔大学眼科与视觉科学系的Borchman D教授团队近日在Exp Eye Res杂志上发表了他们最新的一项工作,他们研究了猪体内磷脂玻璃体液中的区域分布情况。

美国路易斯维尔大学眼科与视觉科学系的Borchman D教授团队近日在Exp Eye Res杂志上发表了他们最新的一项工作,他们研究了猪体内磷脂玻璃体液中的区域分布情况。

他们的主要探讨了猪的玻璃体液、视网膜和晶状体的磷脂局部分布情况。以前已经使用基质辅助激光质谱来观察视网膜和玻璃体中的脂质、蛋白质和其他代谢产物。然而,对于玻璃体液中磷脂的区域分布情况尚待研究。


为了解决这个问题,Borchman D教授团队应用了这种质谱方法来探索局部和体外的猪玻璃体液中的局部磷脂分布。为了在玻璃体液中建立磷脂的可能来源,还研究了玻璃体和视网膜的成分。由于玻璃体液中磷脂的总体含量低,他们优化了非原位和体外研究的实验方法。在晶状体和视网膜甲醇提取物的光谱中观察到的敏感性高于甲醇:氯仿提取物的灵敏度,但组成趋势相同。相对于其他两种提取方法,使用Bligh和Dyer方案获得的玻璃体液提取物的结果显示灵敏度提高了四倍。

对于非原位研究,他们选择以对硝基苯胺为基质的"印模法"。在玻璃体液中,磷脂酰胆碱是最丰富的磷脂。与"印记"方法相比,体外结果显示相对较高的磷脂水平。然而,通过非原位方法发现了更多局部磷脂分布的细节。体外和非原位结果都表明,后部玻璃体区域中含有较高水平的磷脂,其次是前部和中部区域。后部区域含有更多的不饱和物质,而在前部区域检测到的是更多的饱和磷脂。结果表明,在后部玻璃体液中检测到的磷脂是从视网膜和相关的血管系统迁移而来的,而存在于前部区域的那些磷脂则可能来自晶状体。不是所有物种的玻璃体液中的物质都可以在晶状体中检测到。例如,虽然胆固醇是晶状体中的物质,但是在玻璃体液中没有检出胆固醇

最终,他们得出结论:后部玻璃体中不饱和物质的相对丰度较高,并且这些物质还存在于视网膜中。这表明,这些物种能够破坏水-胶原 - 透明质酸结构,并促进玻璃体溶解。这项研究促进了人们对晶状体内磷脂成分分布的认识。

原文出处:

Schnepf, A., Yappert, M. C., & Borchman, D. (2017). Regional distribution of phospholipids in porcine vitreous humor. Exp Eye Res, 160, 116-125. doi:10.1016/j.exer.2017.05.009

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    2017-06-13 muzishouyi
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    2017-06-12 doctorJiangchao

    继续学习。

    0

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