Abstract
The ratio of C26:0/C22:0 fatty acids in patient lipids is widely accepted as a critical clinical criterion of peroxisomal diseases, such as Zellweger syndrome and X-linked adrenoleukodystrophy (X-ALD). However, phospholipid molecular species with very long chain fatty acids (VLCFA) have not been precisely characterized. In the present study, the structures of such molecules in fibroblasts of Zellweger syndrome and X-ALD were examined using LC–ESI–MS/MS analysis. In fibroblasts from Zellweger patients, a large number of VLCFA-containing molecular species were detected in several phospholipid classes as well as neutral lipids, including triacylglycerol and cholesteryl esters. Among these lipids, phosphatidylcholine showed the most diversity in the structures of VLCFA-containing molecular species. Some VLCFA possessed longer carbon chains and/or larger number of double bonds than C26:0-fatty acid (FA). Similar VLCFA were also found in other phospholipid classes, such as phosphatidylethanolamine and phosphatidylserine. In addition, VLCFA-containing phospholipid species showed some differences among fibroblasts from Zellweger patients. It appears that phospholipids with VLCFA, with or without double bonds, as well as C26:0-FA might affect cellular functions, thus leading to the pathogenesis of peroxisomal diseases, such as Zellweger syndrome and X-ALD.
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Abbreviations
- ABCD1:
-
ATP-binding cassette protein D1
- X-ALD:
-
X-linked adrenoleukodystrophy
- CE:
-
Cholesteryl ester
- LC–ESI–MS/MS:
-
Liquid chromatography–electrospray ionization–tandem mass spectrometry
- MS:
-
Mass spectrometry
- PtdCho or PC:
-
Phosphatidylcholine
- PtdEtn or PE:
-
Phosphatidylethanolamine
- PtdGro or PG:
-
Phosphatidylglycerol
- PtdIns or PI:
-
Phosphatidylinositol
- PtdSer or PS:
-
Phosphatidylserine
- TAG or TG:
-
Triacylglycerol
- VLCFA:
-
Very long chain fatty acid(s)
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Acknowledgments
This work was supported by a research grant for the study of Intractable Disease Project from the Ministry of Health, Labour and Welfare (T.I. N.S. and K.Y.), and a grant from the Ministry of Education, Culture, Sports, Science and Technology of Japan to K.H. (KAKENHI #24770114).
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Hama, K., Nagai, T., Nishizawa, C. et al. Molecular Species of Phospholipids with Very Long Chain Fatty Acids in Skin Fibroblasts of Zellweger Syndrome. Lipids 48, 1253–1267 (2013). https://doi.org/10.1007/s11745-013-3848-5
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DOI: https://doi.org/10.1007/s11745-013-3848-5