alexa Altered sphingolipid metabolism induced by tumor hypoxia - new vistas in glycolipid tumor markers.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Glycomics & Lipidomics

Author(s): Yin J, Miyazaki K, Shaner RL, Merrill AH Jr, Kannagi R

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Abstract Uncontrolled growth of malignant cells produces hypoxic regions in locally advanced tumors. Recently we showed that tumor hypoxia-induced transcription of multiple genes involved in glycan synthesis, leading to expression of useful glycolipid tumor markers, such as gangliosides having N-glycolyl sialic acid. Our subsequent studies indicated that the ceramide portion of glycolipids, as well as their glycan moiety, was also significantly affected by hypoxia. Tumor hypoxia-induced marked accumulation of sphinganine (dihydrosphingosine) long-chain base, and significant reduction of unsaturated very long-chain fatty acids in the ceramide moiety. Mass-spectrometry, which yields information on both glycan- and ceramide moieties, is expected to be clinically useful in detecting such distinct molecular species of cancer-associated glycolipids having combined alteration in both glycan- and ceramide moieties. Copyright 2009 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
This article was published in FEBS Lett and referenced in Journal of Glycomics & Lipidomics

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