Alterations in Mouse Brain Lipidome after Disruption of CST Gene: A Lipidomics Study

To investigate the effects of a critical enzyme, cerebroside sulfotransferase (CST), involving sulfatide biosynthesis on lipid (particularly sphingolipid) homeostasis, herein, we determined the lipidomes of brain cortex and spinal cord from CST null and heterozygous (CST −/− and CST +/− , respective...

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Bibliographic Details
Published in:Molecular neurobiology 2014-08, Vol.50 (1), p.88-96
Main Authors: Wang, Chunyan, Wang, Miao, Zhou, Yunhua, Dupree, Jeffrey L., Han, Xianlin
Format: Article
Language:English
Subjects:
Alzheimer's disease
Animals
Biomedical and Life Sciences
Biomedicine
Brain
Brain - metabolism
Cell Biology
Enzymes
Homeostasis - physiology
Lipid Metabolism - genetics
Lipids
Mass Spectrometry
Mice
Myelin Sheath - metabolism
Neurobiology
Neurology
Neurosciences
Spinal Cord - metabolism
Sulfoglycosphingolipids - metabolism
Sulfotransferases - genetics
Sulfotransferases - metabolism
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Summary:To investigate the effects of a critical enzyme, cerebroside sulfotransferase (CST), involving sulfatide biosynthesis on lipid (particularly sphingolipid) homeostasis, herein, we determined the lipidomes of brain cortex and spinal cord from CST null and heterozygous (CST −/− and CST +/− , respectively) mice in comparison to their wild-type littermates by multi-dimensional mass spectrometry-based shotgun lipidomics. As anticipated, we demonstrated the absence of sulfatide in the tissues from CST −/− mice and found that significant reduction of sulfatide mass levels was also present, but in an age-dependent manner, in CST +/− mice. Unexpectedly, we revealed that the profiles of sulfatide species in CST +/− mice were significantly different from that of littermate controls with an increase in the composition of species containing saturated and hydroxylated fatty acyl chains. Contrary to the changes of sulfatide levels, shotgun lipidomics analysis did not detect significant changes of the mass levels of other lipid classes examined. Taken together, shotgun lipidomics analysis demonstrated anticipated sulfatide mass deficiency in CST defect mouse brain and revealed novel brain lipidome homeostasis in these mice. These results might provide new insights into the role of CST in myelin function.
ISSN:0893-7648
1559-1182
DOI:10.1007/s12035-013-8626-0