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Published in: Tumor Biology 11/2014

01-11-2014 | Research Article

COX-2 overexpression and -8473 T/C polymorphism in 3′ UTR in non-small cell lung cancer

Authors: Imtiyaz A. Bhat, Roohi Rasool, Iqbal Qasim, Khalid Z. Masoodi, Shabeer A. Paul, Bashir A. Bhat, Farooq A. Ganaie, Sheikh A. Aziz, Zafar A. Shah

Published in: Tumor Biology | Issue 11/2014

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Abstract

A new class of compounds targeting cyclooxygenase 2 (COX-2) together with other different clinically used therapeutic strategies has recently shown a promise for the chemoprevention of several solid tumors including lung cancer. The aim was to study the possible role of COX-2 -8473 T/C NP and its expression in the pathogenesis of non-small cell lung cancer. One hundred ninety non-small cell lung cancer (NSCLC) patients and 200 healthy age-, sex-, and smoking-matched controls were used for polymorphic analysis, and 48 histopathologically confirmed NSCLC patients were analyzed for COX-2 messenger RNA (mRNA) and protein expression. Our results showed that the frequencies of variant genotypes 8473 CT/CC were significantly less common in the cases (30.0 %) than in the controls (36 %), suggesting that the 8473C variant allele is related with lower susceptibility in NSCLC (OR = 0.79, 95 % CI 0.54–1.4). However, the frequency of COX-2 -8473 TC and CC genotypes were significantly associated with age in NSCLC (P = 0.02). Quantitative real-time expression analysis showed a significant increase in the COX-2 mRNA in tumor tissues as compared to their adjacent normal tissues [delta cycle threshold (ΔCT) = 9.25 ± 4.67 vs 5.63 ± 3.85, P = 0.0001]. Multivariate logistic regression analyses revealed that the COX-2 expression was associated significantly with age (P = 0.044). Also, an increasing trend was observed in stages I and II and in female patients compared to stages III and IV and male patients, respectively, but no statistical significance was observed. However, COX-2 mRNA expression shown no association with the -8473C variant allele. Our findings indicate that the COX-2 T8473C polymorphism may contribute to NSCLC cancer susceptibility in the Kashmiri population, while our expression analysis revealed a significant increase of COX-2 in tumor tissues as compared to their adjacent normal tissues, suggesting that it could become an important therapeutic marker in NSCLC in the future.
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Metadata
Title
COX-2 overexpression and -8473 T/C polymorphism in 3′ UTR in non-small cell lung cancer
Authors
Imtiyaz A. Bhat
Roohi Rasool
Iqbal Qasim
Khalid Z. Masoodi
Shabeer A. Paul
Bashir A. Bhat
Farooq A. Ganaie
Sheikh A. Aziz
Zafar A. Shah
Publication date
01-11-2014
Publisher
Springer Netherlands
Published in
Tumor Biology / Issue 11/2014
Print ISSN: 1010-4283
Electronic ISSN: 1423-0380
DOI
https://doi.org/10.1007/s13277-014-2420-0

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