Gruenewald, Inga, Trautmann, Marcel ORCID: 0000-0002-5842-1196, Busch, Alina, Bauer, Larissa, Huss, Sebastian, Schweinshaupt, Petra, Vollbrecht, Claudia, Odenthal, Margarete, Quaas, Alexander, Buettner, Reinhard, Meyer, Moritz F., Beutner, Dirk, Huettenbrink, Karl-Bernd, Wardelmann, Eva, Stenner, Markus and Hartmann, Wolfgang ORCID: 0000-0002-7609-5021 (2016). MDM2 and CDK4 amplifications are rare events in salivary duct carcinomas. Oncotarget, 7 (46). S. 75261 - 75273. ORCHARD PARK: IMPACT JOURNALS LLC. ISSN 1949-2553

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Abstract

Salivary duct carcinoma (SDC) is an aggressive adenocarcinoma of the salivary glands associated with poor clinical outcome. SDCs are known to carry TP53 mutations in about 50%, however, only little is known about alternative pathogenic mechanisms within the p53 regulatory network. Particularly, data on alterations of the oncogenes MDM2 and CDK4 located in the chromosomal region 12q13-15 are limited in SDC, while genomic rearrangements of the adjacent HMGA2 gene locus are well documented in subsets of SDCs. We here analyzed the mutational status of the TP53 gene, genomic amplification of MDM2, CDK4 and HMGA2 rearrangement/amplification as well as protein expression of TP53 (p53), MDM2 and CDK4 in 51 de novo and ex pleomorphic adenoma SDCs. 25 of 51 cases were found to carry TP53 mutations, associated with extreme positive immunohistochemical p53 staining levels in 13 cases. Three out of 51 tumors had an MDM2 amplification, one of them coinciding with a CDK4 amplification and two with a HMGA2 rearrangement/amplification. Two of the MDM2 amplifications occurred in the setting of a TP53 mutation. Two out of 51 cases showed a CDK4 amplification, one synchronously being MDM2 amplified and the other one displaying concurrent low copy number increases of both, MDM2 and HMGA2. In summary, we here show that subgroups of SDCs display genomic amplifications of MDM2 and/or CDK4, partly in association with TP53 mutations and rearrangement/amplification of HMGA2. Further research is necessary to clarify the role of chromosomal region 12q13-15 alterations in SDC tumorigenesis and their potential prognostic and therapeutic relevance.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Gruenewald, IngaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Trautmann, MarcelUNSPECIFIEDorcid.org/0000-0002-5842-1196UNSPECIFIED
Busch, AlinaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bauer, LarissaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Huss, SebastianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schweinshaupt, PetraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vollbrecht, ClaudiaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Odenthal, MargareteUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Quaas, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Buettner, ReinhardUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Meyer, Moritz F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Beutner, DirkUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Huettenbrink, Karl-BerndUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wardelmann, EvaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stenner, MarkusUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hartmann, WolfgangUNSPECIFIEDorcid.org/0000-0002-7609-5021UNSPECIFIED
URN: urn:nbn:de:hbz:38-255705
DOI: 10.18632/oncotarget.12127
Journal or Publication Title: Oncotarget
Volume: 7
Number: 46
Page Range: S. 75261 - 75273
Date: 2016
Publisher: IMPACT JOURNALS LLC
Place of Publication: ORCHARD PARK
ISSN: 1949-2553
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
IN-SITU HYBRIDIZATION; P53 PATHWAY; HMGI-C; OVEREXPRESSION; REARRANGEMENTS; ACTIVATION; REVEALS; GENEMultiple languages
Oncology; Cell BiologyMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/25570

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