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The role of ceramide in receptor- and stress-induced apoptosis studied in acidic ceramidase-deficient Farber disease cells
University of Münster, Germany.
University of Münster, Germany.
University of Münster, Germany.
University of Tübingen, Germany.
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2001 (Engelska)Ingår i: Oncogene, ISSN 0950-9232, E-ISSN 1476-5594, Vol. 20, nr 45, s. 6493-6502Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The activation of sphingomyelinases leading to the generation of ceramide has been implicated in various apoptotic pathways. However, the role of ceramide as an essential death mediator remains highly controversial. In the present study, we investigated the functional relevance of ceramide in a genetic model by using primary cells from a Farber disease patient. These cells accumulate ceramide as the result of an inherited deficiency of acidic ceramidase. We demonstrate that Farber disease lymphocytes and fibroblasts underwent apoptosis induced by various stress stimuli, including staurosporine, anticancer drugs and gamma -irradiation, equally as normal control cells. In addition, caspase activation by these proapoptotic agents occurred rather similarly in Farber disease and control fibroblasts. Interestingly, Farber disease lymphoid cells underwent apoptosis induced by the CD95 death receptor more rapidly than control cells. Our data therefore suggest that ceramide does not play an essential role as a second messenger in stress-induced apoptosis. However, in accordance with a role in lipid-rich microdomains, ceramide by altering membrane composition may function as an amplifier in CD95-mediated apoptosis.

Ort, förlag, år, upplaga, sidor
Nature Publishing Group, 2001. Vol. 20, nr 45, s. 6493-6502
Nyckelord [en]
absence, activation, Apoptosis, caspase-3, cd95, ceramidase, Ceramide, death, Farber disease, fas, gd3 ganglioside, Mice, niemann-pick-disease, Sphingomyelinase
Nationell ämneskategori
Cancer och onkologi Biokemi och molekylärbiologi
Identifikatorer
URN: urn:nbn:se:liu:diva-87015DOI: 10.1038/sj.onc.1204841ISI: 000171404200001PubMedID: 11641773OAI: oai:DiVA.org:liu-87015DiVA, id: diva2:584241
Tillgänglig från: 2013-01-08 Skapad: 2013-01-08 Senast uppdaterad: 2017-12-06

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