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Interleukin-10 Gene Polymorphisms Influence Susceptibility to Cachexia in Patients with Low-Third Gastric Cancer in a Chinese Population

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Abstract

Background and Objective: Interleukin (IL)-10 is a pleiotropic cytokine that can both stimulate and suppress the immune response. Previous studies have reported that IL-10 production was significantly elevated in cachectic patients, and it has been confirmed that polymorphisms of the IL10 gene could influence its expression. Therefore, we designed this study to investigate whether polymorphisms of the IL10 gene were associated with cachexia in patients with low-third gastric cancer in a Chinese population.

Methods: 190 patients with low-third gastric cancer were included in this study. The serum levels of IL-10 were measured by radioimmunoassay. The single nucleotide polymorphisms (SNPs) at positions -1082A/G, -819T/C, and -592A/C in the IL10 gene promoter were analyzed using polymerase chain reaction (PCR) restriction fragment length polymorphism (PCR-RFLP).

Results: The serum levels of IL-10 were significantly higher in patients with cachexia than in those without (Z = −10.66, p<0.001). Single SNP analysis showed that the frequency of the IL10 -1082G allele was increased in patients with cachexia (p = 0.02). The -1082AG and -819CC genotypes were observed to be associated with an increased risk of cachexia. In a logistic regression analysis adjusted for actual weight and carcinoma stage, the -1082AG genotype was associated with an odds ratio (OR) of 2.45 (95% CI 1.21, 4.96; p = 0.01), and the -819CC genotype was associated with an OR of 3.70 (95% CI 1.20, 11.39; p = 0.02) for cachexia. Furthermore, haplotype analysis of the -1082A/G, -819T/C, and -592A/C SNPs revealed that at least five haplotypes (ATA, ACC, GCC, ACA, and ATC) were present in this Chinese population, and the -1082G/-819C/-592C (GCC) haplotype was associated with a significantly increased risk of cachexia as compared with the ATA haplotype (OR = 2.42; 95% CI 1.17, 5.00; p = 0.02).

Conclusion: Our results indicate that genetic polymorphisms of IL-10 may influence susceptibility to cachexia in patients with low-third gastric cancer in this Chinese population.

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Acknowledgments

This study was supported, in part, by grants from Shandong Natural Foundation (Y2006C20) and the Key Project of Shandong Scientific and Technology (2008GG30002034). The authors have no conflicts of interest that are directly relevant to the content of this study.

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Authors and Affiliations

  1. Department of General Surgery, Affiliated Hospital of Medical College, Qingdao University, 16 Jiangsu Road, Qingdao, 266003, Shandong Province, China

    Fengbo Sun, Zhaohua Yu,  Dianliang Zhang, Jian Zhang & Hongmei Zheng

  2. Intensive Care Unit, Affiliated Hospital of Medical College, Qingdao University, Qingdao, Shandong, China

    Yunbo Sun

  3. Yantai Yantaishan Hospital, Yantai, Shandong, China

    Bo Song

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  1. Fengbo Sun
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  2. Yunbo Sun
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  4. Dianliang Zhang
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  5. Jian Zhang
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Correspondence to Dianliang Zhang.

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Sun, F., Sun, Y., Yu, Z. et al. Interleukin-10 Gene Polymorphisms Influence Susceptibility to Cachexia in Patients with Low-Third Gastric Cancer in a Chinese Population. Mol Diag Ther 14, 95–100 (2010). https://doi.org/10.1007/BF03256358

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