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Cited by 262

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A Critical Role for Ceramide Synthase 2 in Liver Homeostasis

Open access
Pewzner-Jung, Yael, Park, Hyejung, Laviad, Elad L., Silva, Liana C., Lahiri, Sujoy, Stiban, Johnny, Erez-Roman, Racheli, Brügger, Britta, Sachsenheimer, Timo, Wieland, Felix, Prieto, Manuel, Merrill, Alfred H., Futerman, Anthony H.·2010·Journal of Biological Chemistry

Abstract

Ceramide is an important lipid signaling molecule that plays critical roles in regulating cell behavior. Ceramide synthesis is surprisingly complex and is orchestrated by six mammalian ceramide synthases, each of which produces ceramides with restricted acyl chain lengths. We have generated a CerS2 null mouse and characterized the changes in the long chain base and sphingolipid composition of livers from these mice. Ceramide and downstream sphingolipids were devoid of very long (C22-C24) acyl chains, consistent with the substrate specificity of CerS2 toward acyl-CoAs. Unexpectedly, C16-ceramide levels were elevated, and as a result, total ceramide levels were unaltered; however, C16-ceramide synthesis in vitro was not increased. Levels of sphinganine were also significantly elevated, by up to 50-fold, reminiscent of the effect of the ceramide synthase inhibitor, fumonisin B1. With the exceptions of glucosylceramide synthase and neutral sphingomyelinase 2, none of the other enzymes tested in either the sphingolipid biosynthetic or degradative pathways were significantly changed. Total glycerophospholipid and cholesterol levels were unaltered, although there was a marked elevation in C18:1 and C18:2 fatty acids in phosphatidylethanolamine, concomitant with a reduction in C18:0 and C20:4 fatty acids. Finally, differences were observed in the biophysical properties of lipid extracts isolated from liver microsomes, with membranes from CerS2 null mice displaying higher membrane fluidity and showing morphological changes. Together, these results demonstrate novel modes of cross-talk and regulation between the various branches of lipid metabolic pathways upon inhibition of very long acyl chain ceramide synthesis.

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Metadata

Authors
Pewzner-Jung, Y., Park, H., Laviad, E. L., Silva, L. C., Lahiri, S., Stiban, J., Erez-Roman, R., Brügger, B., Sachsenheimer, T., Wieland, F., Prieto, M., Merrill, A. H., & Futerman, A. H.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2010-04
Volume
285
Issue
14
Pages
10902-10910
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2017859854
Cited by
262
References
8
FWCI
7.56
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: A Critical Role for Ceramide Synthase 2 in Liver Homeostasis. https://app.cochat.ai/papers/10.1074/jbc.m109.077594
The paper
Pewzner-Jung, Y., Park, H., Laviad, E. L., Silva, L. C., Lahiri, S., Stiban, J., Erez-Roman, R., Brügger, B., Sachsenheimer, T., Wieland, F., Prieto, M., Merrill, A. H., & Futerman, A. H. (2010). A Critical Role for Ceramide Synthase 2 in Liver Homeostasis. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m109.077594

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.