a selective detection of lysophosphatidylcholine in dried blood spots for diagnosis of adrenoleukodystrophy by lc-ms/ms
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2016
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Abstract
X-linked adrenoleukodystrophy (X-ALD) is a rare inherited metabolic disorder characterized by an impaired beta-oxidation of very long chain fatty acids in the peroxisomes. Recent studies have suggested that 1-hexacosanoyl-2-hydroxy-sn-glycero-3-phosphocholine (Lyso-PC 26:0) can be a sensitive biomarker for X-ALD. Although approximately 10-fold increase in the concentration of Lyso-PC 26:0 in DBSs from X-ALD-affected individuals were reported, whether the carriers might be distinguished from the healthy controls remained unclear. To address this question, we have validated previously developed LC-MS/MS-based analytical procedures using QC DBS. We found that the recovery of Lyso-PC 26:0 from the QC DBSs was 73.6 ± 0.3% when 2 μM of Lyso-PC 26:0 was spiked into the blood. Based on this result, the amounts of Lyso-PC 26:0 in the controls and ALD-affected individuals were 0.090 ± 0.004 (n = 11) and 1.078 ± 0.217 (n = 4) pmol/DBS, respectively. Interestingly, the concentration of Lyso-PC 26:0 in the carriers were 0.548 ± 0.095 pmol/DBS (n = 3), indicating that the carriers and the healthy controls can be distinguished. These results suggest that LC-MS/MS-based technique can be used for the detection of asymptomatic carriers and X-ALD-affected subjects in the newborn screening.
| Reference Key |
mashima2016moleculara
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|---|---|
| Authors | ;Ryuichi Mashima;Misa Tanaka;Eri Sakai;Hidenori Nakajima;Tadayuki Kumagai;Motomichi Kosuga;Torayuki Okuyama |
| Journal | advances in skin & wound care |
| Year | 2016 |
| DOI |
10.1016/j.ymgmr.2016.02.007
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