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Research & Reviews: A Journal of Bioinformatics

Prognostic impact of individual and complex mutations of the k-ras, p16 and p53 genes on postoperative prognosis and overall survival of patients with gastric cancer

  1. Song Gun Kim
  2. Chol Ryong Kwak
  3. Song Ung Kang
  4. Tae Yong Jon
  5. Ke Ho Ju

Abstract

Background: The aim of this study was to determine the post-operative overall survival and prognostic factors associated with k-ras, p16, p53 gene mutations in patients with gastric cancer.Materials: We used the paraffin-embedded specimens from 70 patients with gastric cancer who correspond with the investigation purpose (patients had performed D2 lymph node dissection, no pre and post-operation chemotherapy) from 2000 to 2015. The sample consisted of 49 (70.0%) males and 21 (30.0%) females. Methods: The mutations of k-ras, p16 and p53 genes were assessed by polymerase chain reaction (PCR), PCR-single strand conformation polymorphism (PCR-SSCP). Result: We studied complex mutation rates of these genes we detected that the complex mutation rate of k-ras and p16 with p53 no mutation was 10.0% (7/70) and post-operative overall survival time was 6.57±0.5 years, the complex mutation of p16 and p53 with no k-ras:10.0% (7/70), 1.57±0.5years, the complex mutation rate of k-ras and p53 with no p16: 18.6% (13/70), 6.29±0.5years, and the complex mutation rate of k-ras, p16 and p53 genes: 24.3% (17/70), 3.29±0.5years. No mutation rate :8.6%(6/70), 9.83±1.7 years.Conclusion: The post-operative overall survival time depends on status of individual and complex mutations of p16 and p53 genes. In other words, we have found out that 5-year survival rate may be successfully high even though patients are in the last stage of gastric cancer if there are no complex mutations of these tumor suppress genes. Therefore, they can be used as the prognostic biomarker of gastric cancer.

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