Abstract
Genome-wide association studies have revealed that some single nucleotide polymorphisms at 8q24, such as rs6983267, might be effective in susceptibility to various cancers in different populations. Therefore, rs6983267 might be useful as a marker for multiple cancers. In this study, we considered a population, including 478 gastrointestinal cancer cases from the Iranian population, to investigate the association between rs6983267 and susceptibility to gastrointestinal cancers. The samples were genotyped using the TaqMan real-time PCR method while 10% of them were also confirmed by sequencing. Higher frequency of G allele was associated with higher grades of tumors in esophageal cancer and the tumors located in the lower portion of the esophagus (OR 3.56; 95% CI 1.13–11.24; P = 0.03) and cardia (OR 5.24; 95% CI 1.26–21.83; P = 0.02), which both locations are involved in esophageal adenocarcinomas with poor prognosis. The results indicated that in the male subgroup, the rs6983267 GG genotype significantly enhanced the gastric cancer susceptibility (OR 4.76; 95% CI 1.57–14.45; P = 0.01). GG genotype also increased the risk of intestinal-type gastric cancer, located in non-cardia (OR 4.62; 95% CI 1.25–17.04; P = 0.02). Moreover, gastric cancer cases and controls with a family history of gastrointestinal tumors were mostly genotyped with the G allele (OR 3.61; 95% CI = 1.09–12.01; P = 0.04). There were no remarkable associations between rs6983267 and susceptibility to esophageal and colon cancers in the Iranian population. However, different genotypes of rs6983267 had significant correlations with tumor grade, cancer type, and family history of gastrointestinal cancers. Further investigations in a larger population and other ethnicities are required to confirm these results.
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Acknowledgements
This work was supported by Ferdowsi University of Mashhad (Grant Numbers: 46877, 46879, and 46673) and Mashhad University of Medical Sciences (Grant Number: 960032). We are indebted to our study participants, whose contribution made this research possible. We also thank all the clinicians and staff of Imam Reza Hospital, Isar Clinic, Reza Radiotherapy and Oncology Center, Omid Hospital, Ghaem Hospital, and Shahid Hashemi Nejad Hospital for their generous help in providing blood samples. The technical help of Mr. Mahdi Nohtani is also greatly appreciated.
Funding
This work was supported by Ferdowsi University of Mashhad (Grant Numbers: 46877, 46879, and 46673) and Mashhad University of Medical Sciences (Grant Number: 960032).
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MMM and ARB designed the experiments and proofread the manuscript. FK, SMAM, and ZB performed the experiments and analyzed the data. FK and SMAM also wrote the manuscript. MMM and LG financially supported this project. LG, AA, MM, AFP, AB, AET, MAK, and HR helped in providing blood samples.
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Karimi, F., Amiri-Moghaddam, S.M., Bagheri, Z. et al. Investigating the association between rs6983267 polymorphism and susceptibility to gastrointestinal cancers in Iranian population. Mol Biol Rep 48, 2273–2284 (2021). https://doi.org/10.1007/s11033-021-06249-5
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DOI: https://doi.org/10.1007/s11033-021-06249-5