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Annals of Clinical & Laboratory Science 38:113-119 (2008)
© 2008 Association of Clinical Scientists

Association of IL-6 Gene Polymorphisms with Cachexia Susceptibility and Survival Time of Patients with Pancreatic Cancer

Dianliang Zhang1, Yanbin Zhou1, Liqun Wu1, Shuchun Wang1, Hongmei Zheng2, Baojun Yu3 and Jieshou Li3
1 Departments of General Surgery and 2 Rehabilitation, Qingdao University Medical College Hospital, Qingdao, and 3 Institute of General Surgery, Jinling Hospital, Nanjing University, Nanjing, China

Address correspondence to Dr. Dianliang Zhang, Department of General Surgery, Hospital of Qingdao University Medical College, 16 Jiangsu Road, Qingdao 266003, Shandong Province, P. R. China; tel 86 532 8291 1324; fax 86 532 8279 0962; e-mail phdzdl{at}yahoo.com.

The purpose of this study was to determine the predictive value of IL-6-572, –190, and –634 gene polymorphisms on the cachexia susceptibility and survival time of patients with pancreatic cancer. Genotypes were determined using restriction fragment length polymorphism analysis of polymerase chain reaction products. All of the subjects were homozygous to the C allele of IL-6-190. No significant differences were found in the IL-6-572G and –190C distributions between the cachexia group and the non-cachexia group. Patients with cachexia showed significantly higher prevalence of common bile duct obstruction (CBD) than those without (p = 0.026). A significantly increased frequency of the IL-6-634G allele was noted in the cachexia group vs the non-cachexia group (p = 0.021). Logistic regression adjusted for sex, age, duodenal obstruction, and CBD obstruction, the IL-6-634 CG + GG genotype was associated with an odds ratio of 2.785 (1.034, 7.501) for cachexia. Patients with IL-6-634 CG + GG carrier showed shorter duration of survival than those with CC genotype (p = 0.023). These results indicate that the IL-6-634G allele is associated with increased susceptibility to cachexia and decreased survival time of Chinese patients suffering from pancreatic cancer.

Keywords: IL-6 gene polymorphism, cachexia, pancreatic cancer, cytokines






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