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dc.contributor.authorEngesæter, Birgit Øvstebø
dc.contributor.authorEngebråten, Olav
dc.contributor.authorFlørenes, Vivi Ann
dc.contributor.authorMælandsmo, Gunhild
dc.date.accessioned2013-03-08T07:21:17Z
dc.date.available2013-03-08T07:21:17Z
dc.date.issued2012
dc.description.abstractMapatumumab and lexatumumab (targeting death receptor 4 (DR4) and 5 (DR5), respectively) are agonistic TRAIL receptor antibodies that induce apoptosis in a wide range of cancer cells. The potency of mapatumumab and lexatumumab was assessed in mono therapy protocols, and the ability to sensitize for dacarbazine (DTIC) treatment was explored in ten different melanoma cell lines. Our data indicated that melanoma cell lines tend to be resistant to mapatumumab, most likely due to low expression of DR4, while a dose dependent response to lexatumumab was observed. Combining DTIC and lexatumumab induced an additive or synergistic effect on cell death in the various melanoma cell lines. The synergistic effect observed in the FEMX-1 cell line was related to enhanced cleavage of Bid in parallel with elevated expression of the pro-apoptotic proteins Bim, Bax and Bak. Furthermore, the anti-apoptotic proteins Bcl-XL, cIAP-1, XIAP and livin were down regulated. Cleavage of Bid and down regulation of cIAP-2 and livin were observed in vivo. Altogether, these data suggest a change in the balance between pro- and anti-apoptotic proteins favoring induction of apoptosis. In the more therapy resistant cell line, HHMS, no changes in the pro- and anti-apoptotic proteins were observed. FEMX-1 xenografts treated with DTIC and lexatumumab showed reduced growth and increased level of apoptosis compared to the control groups, providing arguments for further evaluation of this combination in melanoma patients.en
dc.identifier.citationPLoS ONE (2012), vol. 7(9): e45492.en
dc.identifier.cristinIDFRIDAID 974690
dc.identifier.doihttp://dx.doi.org/10.1371/journal.pone.0045492
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/10037/4920
dc.identifier.urnURN:NBN:no-uit_munin_4631
dc.language.isoengen
dc.publisherPublic Library of Science (PLoS)en
dc.rights.accessRightsopenAccess
dc.subjectVDP::Medical disciplines: 700::Basic medical, dental and veterinary science disciplines: 710::Physiopathology: 721en
dc.subjectVDP::Medisinske Fag: 700::Basale medisinske, odontologiske og veterinærmedisinske fag: 710::Patofysiologi: 721en
dc.subjectVDP::Medical disciplines: 700::Basic medical, dental and veterinary science disciplines: 710::Medical molecular biology: 711en
dc.subjectVDP::Medisinske Fag: 700::Basale medisinske, odontologiske og veterinærmedisinske fag: 710::Medisinsk molekylærbiologi: 711en
dc.titleDacarbazine and the Agonistic TRAIL Receptor-2 Antibody Lexatumumab Induce Synergistic Anticancer Effects in Melanomaen
dc.typeJournal articleen
dc.typeTidsskriftartikkelen
dc.typePeer revieweden


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