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Expression of DNA repair proteins, MSH2, MLH1 and MGMT in mobile tongue squamous cell carcinoma: associations with clinicopathological parameters and patients’ survival
Author(s) -
Theocharis Stamatios,
Klijanienko Jerzy,
Giaginis Constantinos,
Rodriguez Jose,
Jouffroy Thomas,
Girod Angelique,
Point Daniel,
Tsourouflis Gerasimos,
SastreGarau Xavier
Publication year - 2011
Publication title -
journal of oral pathology and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 83
eISSN - 1600-0714
pISSN - 0904-2512
DOI - 10.1111/j.1600-0714.2010.00945.x
Subject(s) - msh2 , mlh1 , msh6 , perineural invasion , dna repair , cancer research , biology , dna mismatch repair , pathology , cancer , medicine , oncology , gene , genetics
J Oral Pathol Med (2011) 40 : 218–226 Background: DNA repair is a major defense mechanism, which contributes to the maintenance of genetic sequence, minimizing cell death, mutation rates, replication errors, DNA damage persistence and genomic instability. Alterations of proteins participating in DNA repair mechanisms have been associated with several aspects of cancer biology. The present study aimed to evaluate the clinical significance of DNA repair proteins, MSH2, MLH1 and MGMT in mobile tongue squamous cell carcinoma (SCC). Methods: MSH2, MLH1 and MGMT protein expression was assessed immunohistochemically on 49 mobile tongue SCC tissue samples and was analyzed in relation with clinicopathological characteristics, overall and disease‐free patients’ survival. Results: MSH2 expression was significantly associated with depth of invasion ( P = 0.0335), tumor shape ( P = 0.0396) and muscular invasion ( P = 0.0098). MLH1 expression was significantly associated with lymph node metastases ( P = 0.0484) and borderline with perineural invasion ( P = 0.0699). MGMT expression was significantly associated with depth of invasion ( P = 0.0472), tumor shape ( P = 0.0187), perineural invasion ( P = 0.0115) and lymph node metastases ( P = 0.0032) and borderline with vascular invasion ( P = 0.0755). MSH2 expression was significantly associated with disease‐free patients’ survival in univariate analysis ( P = 0.0441), being also identified as an independent prognostic factor in multivariate analysis ( P = 0.0451). Conclusions: The present study supported evidence for possible implication of MSH2, MLH1 and MGMT proteins in the formation and progression of mobile tongue SCC.