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Associations between interleukin-1 polymorphisms and gastric cancers among three ethnicities
Jiu-Da Zhao1, Pai-Li Geng, Zhan-Quan Li
1Internal Medicine-Oncology, Affiliated Hospital of Qinghai University, Xining 810000, Qinghai Province, China. jiudazhao@126.com
World Journal of Gastroenterology
|January 17, 2013
Summary
Interleukin (IL)-1B and IL-1RN gene variations are linked to increased gastric cancer risk in Tibet, Hui, and Han populations. Specific genotypes show differential associations with intestinal and diffuse gastric cancer types.
Area of Science:
- Genetics and Genomics
- Oncology
- Population Health
Background:
- Gastric cancer remains a significant global health concern.
- Ethnic variations in genetic susceptibility to gastric cancer are increasingly recognized.
- Interleukin-1B (IL-1B) and Interleukin-1 Receptor Antagonist (IL-1RN) are key inflammatory cytokines implicated in cancer development.
Purpose of the Study:
- To investigate the associations between specific polymorphisms in IL-1B and IL-1RN genes and the risk of gastric cancer.
- To examine these associations across distinct ethnic groups: Tibet, Hui, and Han populations in China.
- To identify potential ethnic-specific genetic risk factors for gastric cancer.
Main Methods:
- Genomic DNA was isolated from peripheral blood samples of healthy volunteers and gastric cancer patients from the specified ethnic groups.
- Polymorphisms in the IL-1B and IL-1RN genes were analyzed using denaturing high-performance liquid chromatography (DHPLC).
- Statistical analysis, including odds ratio (OR) calculations, was performed to assess the risk associated with different genotypes.
Main Results:
- In the Tibet ethnicity, the IL-1B-31 CC genotype was associated with an increased risk of intestinal type gastric cancer (OR = 2.17).
- In the Hui ethnicity, the IL-1B 2/L genotype showed increased risk for both intestinal and diffuse gastric cancer (OR = 2.08, 2.31).
- In the Han population, specific IL-1B genotypes (IL-1B-31 CC, IL-1B-511CT, TT) significantly increased the risk of intestinal type gastric cancer (ORs ranging from 2.51 to 5.66).
Conclusions:
- The study suggests that IL-1B and IL-1RN genotypes play a differential role in the development of gastric cancer among Tibet, Hui, and Han ethnicities.
- These findings highlight the importance of considering ethnic-specific genetic factors in gastric cancer susceptibility.
- Further research may elucidate the precise mechanisms by which these cytokine gene polymorphisms influence gastric carcinogenesis in diverse populations.
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