title: Bcl-2 overexpression prevents apoptosis induced by ceramidase inhibitors in malignant melanoma and HaCaT keratinocytes.
abstract: We examined the biological effects of the ceramide analogues (1S,2R)-2-N-myristoylamino-1-phenyl-1-propanol (D-e-MAPP) and (1R,2R)-2-N-myristoylamino-1-(4-nitrophenyl)-1,3-propandiol (D-NMAPPD) on human HaCaT keratinocytes and human melanoma cells. We could demonstrate that D-e-MAPP and D-NMAPPD are able to suppress acid ceramidase activity. The elevation of the endogenous level of ceramide is followed by induction of apoptosis and suppression of proliferation in HaCaT keratinocytes. Moreover, we recently identified a group of human melanoma cell populations which are heterogeneously susceptible to C2-ceramide-mediated apoptosis. Studies with these melanoma cells revealed correlation between ceramide-mediated apoptosis and D-NMAPPD-induced apoptosis, confirming the effect of this inhibitor on ceramide signaling in human melanoma cells. These findings suggest ceramidase inhibitors as a potential new therapeutical class of antiproliferative and cytostatic drugs.
authors.affiliation: Department of Dermatology, University Medical Center Benjamin Franklin, The Free University of Berlin, 14195, Berlin, Germany.
authors.forename: Monika
authors.initials: M
authors.lastname: Raisova
authors.forename: Gerit
authors.initials: G
authors.lastname: Goltz
authors.forename: Meryem
authors.initials: M
authors.lastname: Bektas
authors.forename: Alicja
authors.initials: A
authors.lastname: Bielawska
authors.forename: Christian
authors.initials: C
authors.lastname: Riebeling
authors.forename: Amir M
authors.initials: AM
authors.lastname: Hossini
authors.forename: Jürgen
authors.initials: J
authors.lastname: Eberle
authors.forename: Yusuf A
authors.initials: YA
authors.lastname: Hannun
authors.forename: Constantin E
authors.initials: CE
authors.lastname: Orfanos
authors.forename: Christoph C
authors.initials: CC
authors.lastname: Geilen
mesh_terms: D055573:Acid Ceramidase; D000581:Amidohydrolases / Q000037:antagonists & inhibitors*; D017209:Apoptosis / Q000187:drug effects* / Q000235:genetics*; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D055572:Ceramidases; D002518:Ceramides / Q000378:metabolism / Q000494:pharmacology; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D015870:Gene Expression; D019254:Genes, bcl-2; D006801:Humans; D015603:Keratinocytes / Q000166:cytology / Q000187:drug effects / Q000201:enzymology; D008545:Melanoma / Q000188:drug therapy* / Q000201:enzymology / Q000235:genetics / Q000473:pathology*; D009226:Myristates / Q000494:pharmacology; D011412:Propanolamines / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: C454759:2-N-myristoylamino-1-(4-nitrophenyl)-1,3-propandiol; D002518:Ceramides; D004791:Enzyme Inhibitors; D009226:Myristates; D011412:Propanolamines; C099657:2-(N-myristoylamino)-1-phenyl-1-propanol; D000581:Amidohydrolases; C526693:ASAH1 protein, human; D055573:Acid Ceramidase; D055572:Ceramidases