Individual organelle pH determinations of magnetically enriched endocytic organelles via laser-induced fluorescence detection.
Individual organelle pH determinations of magnetically enriched endocytic organelles via laser-induced fluorescence detection.
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通过激光诱导荧光检测对磁性富集的内吞细胞器的单个细胞器 pH 值进行测定。
DOI:
10.1021/ac201196n
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发表时间:
2011
影响因子:
7.4
通讯作者:
Arriaga,EdgarA
中科院分区:
文献类型:
--
作者:
Satori,ChadP;Kostal,Vratislav;Arriaga,EdgarA
The analysis of biotransformations that occur in lysosomes and other endocytic organelles is critical to studies on intracellular degradation, nutrient recycling, and lysosomal storage disorders. Such analyses require bioactive organelle preparations that are devoid of other contaminating organelles. Commonly used differential centrifugation techniques produce impure fractions and may not be compatible with microscale separation platforms. Density gradient centrifugation procedures reduce the level of impurities but may compromise bioactivity. Here we report on simple magnetic setup and a procedure that produce highly enriched bioactive organelles based on their magnetic capture as they traveled through open tubes. Following capture, in-line laser-induced fluorecence detection (LIF) determined for the first time the pH of each magnetically retained individual endocytic organelle. Unlike bulk measurements, this method was suitable to describe the distributions of pH values in endocytic organelles from L6 rat myoblasts treated with dextran-coated iron oxide nanoparticles (for magnetic retention) and fluorescein/TMRM-conjugated dextran (for pH measurements by LIF). Their individual pH values ranged from 4 to 6, which is typical of bioactive endocytic organelles. These analytical procedures are of high relevance to evaluate lysosomal-related degradation pathways in aging, storage disorders, and drug development.
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期刊:
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影响因子:
--
作者:
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通讯作者:
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通讯作者:
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DOI:
--
发表时间:
2010
期刊:
In Analysis
影响因子:
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