The MDM2 polymorphism SNP309 is associated with clinical characteristics and outcome in diffuse large B-cell lymphoma

Hedstrom, Gustav and Thunberg, Ulf and Amini, Rose-Marie and Zainuddin, Norafiza and Enblad, Gunilla and Berglund, Mattias (2014) The MDM2 polymorphism SNP309 is associated with clinical characteristics and outcome in diffuse large B-cell lymphoma. European Journal of Haematology, 93 (6). pp. 500-508. ISSN 1600-0609

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Abstract

Introduction The murine double minute 2 (MDM2) gene encodes a regulatory protein of the p53 pathway. A single nucleotide polymorphism (T to G change) at position 309 (SNP309) in the promotor region of MDM2 affects the transcription activity of MDM2 and has been found to be a negative prognostic marker in several cancers. Patients and methods In this study, the MDM2 SNP309 polymorphism was analysed in 201 patients with diffuse large B-cell lymphoma and analysed in relation to clinical characteristics and prognosis. Results Patients homozygous for SNP309T had a significantly longer overall survival, lymphoma-specific survival and disease-free survival (P = 0.002; 0.004 and 0.006 respectively) compared to patients carrying a G allele. The longer overall survival was seen in the subgroup of patients not treated with Rituximab, however, not for Rituximab-treated patients (P = 0.01 and 0.2 respectively). The group homozygous for the T allele also had lower age at diagnosis, a tendency towards lower aaIPI and a significantly lower proportion of patients with p53 aberrations compared to the group including at least one G allele. However, the survival differences persisted even after removal of cases with known p53 aberrations from the analysis. Conclusion Polymorphism in MDM2 SNP309 could be correlated to some clinical characteristics and for patients not treated with immunotherapy, a G allele was correlated to poor survival, whereas no survival differences were found for patients treated with Rituximab. Herewith, we provide additional information about Diffuse large B-cell Lymphoma (DLBCL) biology and highlight the importance of evaluation of molecular markers in relation to treatment.

Item Type:	Article (Journal)
Additional Information:	4623/43697
Uncontrolled Keywords:	diffuse large B-cell lymphoma; prognostic; survival; murine double minute 2
Subjects:	R Medicine > R Medicine (General) R Medicine > RC Internal medicine > RC254 Neoplasms. Tumors. Oncology (including Cancer)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Allied Health Sciences > Department of Biomedical Science (Effective:1st July 2011)
Depositing User:	Dr. Norafiza Zainuddin
Date Deposited:	06 Jul 2015 09:32
Last Modified:	25 Sep 2017 09:51
URI:	http://irep.iium.edu.my/id/eprint/43697

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