Digestive Diseases and Sciences

, Volume 52, Issue 11, pp 2942–2949 | Cite as

The Association of Serotonin Transporter Genetic Polymorphisms and Irritable Bowel Syndrome and Its Influence on Tegaserod Treatment in Chinese Patients

  • Yuyuan Li
  • Yuqiang Nie
  • Jun Xie
  • Weizhan Tang
  • Peizhi Liang
  • Weihong Sha
  • Hui Yang
  • Yonyjian Zhou
Original Paper


The aims of this study were to investigate the relationship of genetic polymorphisms of the serotonin reuptake transporter and the clinical subtypes of irritable bowel syndrome and its influence on the efficacy of tegaserod in Chinese irritable bowel syndrome patients with constipation. Genetic polymorphisms were analyzed in 87 patients and 96 controls, then 41 irritable bowel syndrome patients with constipation received tegaserod for 4 weeks. The primary efficacy variable was the responder rate measured by Subject's Global Assessment of Relief. Secondary efficacy assessed the changes of individual symptoms weekly. There was no significant difference in genotype frequencies between the patients as a whole and the control group. The frequency of the L/L genotype in the serotonin transporter gene-linked polymorphic region was significantly higher in patients with constipation than in controls (25.0% vs. 7.3%). Responder rates to tegaserod were significantly higher in the S/S (85.0%) and L/S (70.0%) than in the L/L genotype (36.4%). All secondary variables also significantly improved in the S/S and L/S groups compared to the L/L group. This study suggests the hypothesis that individuals with the L/L genotype are vulnerable to development of irritable bowel syndrome with constipation, and patients with the L/L genotype respond poorly to treatment with a routine dose of tegaserod.


Irritable bowel syndrome Serotonin transporter Polymorphisms Tegaserod 


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Yuyuan Li
    • 1
  • Yuqiang Nie
    • 1
  • Jun Xie
    • 1
  • Weizhan Tang
    • 1
  • Peizhi Liang
    • 1
  • Weihong Sha
    • 1
  • Hui Yang
    • 1
  • Yonyjian Zhou
    • 1
  1. 1.Department of Gastroenterology and Hepatology, First Municipal People’s Hospital of GuangzhouGuangzhou Medical CollegeGuangzhouP.R. China

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