Study of the polymorphisms of cyclooxygenase‑2 (‑765G>C) and 5‑lipoxygenase (1708G>A) in patients with colorectal cancer

  • Authors:
    • Célia Aparecida Marques Pimenta
    • Flavia Roche Moreira Latini
    • Jacqueline Miranda De Lima
    • Tiago Donizetti Da Silva
    • Aledson Vitor Felipe
    • Vanessa Maria De Lima Pazine
    • Nora Manoukian Forones
  • View Affiliations

  • Published online on: December 5, 2013     https://doi.org/10.3892/ol.2013.1732
  • Pages: 513-518
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Abstract

Colorectal cancer (CRC) is the fourth most common cause of cancer‑related mortality worldwide. Genetic alterations have been associated with an increased risk of cancer and greater tumor aggressiveness. Cyclooxygenase‑2 (COX‑2) and 5‑lipoxygenase (5‑LOX) genes are important in cell cycle regulation, tumor growth and prostaglandin synthesis. The aim of the present study was to investigate the association between polymorphisms in the COX‑2 and 5‑LOX genes and the risk of CRC. A case‑control study was conducted in patients with CRC matched for gender and age to a control group. DNA was extracted from peripheral leukocytes, and the polymorphisms were analyzed by polymerase chain reaction‑restriction fragment length polymorphism and gene sequencing. A specific questionnaire was applied to evaluate smoking, excessive alcohol consumption, physical activity, non‑steroidal anti‑inflammatory drug use and meat, fiber and fat intake. A total of 185 patients with CRC and 146 controls were studied. The heterozygous GC genotype of the COX‑2 gene polymorphism was the most common in the two groups (60.0% in CRC patients and 52.7% in controls). The CC genotype was associated with an increased risk of CRC (odds ratio, 3.63; 95% confidence interval, 1.31‑10.1; P=0.013). The homozygous wild‑type genotype of the 5‑LOX gene polymorphism was detected in 72.4% of the CRC patients and in 71.2% of the control subjects. The homozygous mutant genotype (CC) of the COX‑2 gene is an independent risk factor for CRC. No association was found between 5‑LOX genotypes and CRC.
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2014-February
Volume 7 Issue 2

Print ISSN: 1792-1074
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Spandidos Publications style
Pimenta CA, Latini FR, De Lima JM, Da Silva TD, Felipe AV, De Lima Pazine VM and Forones NM: Study of the polymorphisms of cyclooxygenase‑2 (‑765G>C) and 5‑lipoxygenase (1708G>A) in patients with colorectal cancer. Oncol Lett 7: 513-518, 2014
APA
Pimenta, C.A., Latini, F.R., De Lima, J.M., Da Silva, T.D., Felipe, A.V., De Lima Pazine, V.M., & Forones, N.M. (2014). Study of the polymorphisms of cyclooxygenase‑2 (‑765G>C) and 5‑lipoxygenase (1708G>A) in patients with colorectal cancer. Oncology Letters, 7, 513-518. https://doi.org/10.3892/ol.2013.1732
MLA
Pimenta, C. A., Latini, F. R., De Lima, J. M., Da Silva, T. D., Felipe, A. V., De Lima Pazine, V. M., Forones, N. M."Study of the polymorphisms of cyclooxygenase‑2 (‑765G>C) and 5‑lipoxygenase (1708G>A) in patients with colorectal cancer". Oncology Letters 7.2 (2014): 513-518.
Chicago
Pimenta, C. A., Latini, F. R., De Lima, J. M., Da Silva, T. D., Felipe, A. V., De Lima Pazine, V. M., Forones, N. M."Study of the polymorphisms of cyclooxygenase‑2 (‑765G>C) and 5‑lipoxygenase (1708G>A) in patients with colorectal cancer". Oncology Letters 7, no. 2 (2014): 513-518. https://doi.org/10.3892/ol.2013.1732