Abstract
Background
Visceral sensory impulses are transmitted via C-fibers from the gastrointestinal tract to the central nervous system. The tetrodotoxinresistant (TTX-r) sodium channel, Na(V) 1.8/SNS (sensory-neuron specific), encoded by SCN10A, has been identified on C-fibers. We attempted to clarify the association between functional dyspepsia (FD) and SCN10A non-synonymous polymorphisms (2884 A>G, 3218 C>T and 3275 T>C).
Methods
The study was performed in 642 subjects (345 with no symptoms and 297 with FD). We employed a multiplex polymerase chain reaction single-strand confirmation polymorphism (PCR-SSCP) method to detect the gene polymorphisms.
Results
The 3218 CC homozygotes had a reduced risk for the development of FD [odds ratio (OR) 0.589; 95 % confidence interval (CI) 0.402–0.864; p = 0.0067]. In addition, both 2884 A>G and 3275 T>C, which were in linkage disequilibrium, were also associated with the development of FD (p = 0.039 and 0.028, respectively). Each 2884 G carrier, 3218 CC homozygote, and 3275 C carrier had a reduced risk for the development of both epigastric pain syndrome (EPS) and postprandial distress syndrome (PDS). The subjects with the 2884 G allele, 3275 C allele, and no 3218 T allele had a reduced risk for FD (OR 0.618; 95 % CI 0.448–0.853; p = 0.0034). This haplotype was associated with a reduced risk for both EPS and PDS (p = 0.0011 and 0.0056, respectively). In addition, there was a significant association between FD and this haplotype in Helicobacter pylori-negative subjects (OR 0.463; 95 % CI 0279–0.9768; p = 0.0029).
Conclusion
We conclude that genetic polymorphisms of SCN10A are closely associated with FD (both EPS and PDS), especially in H. pylori-negative subjects, in Japanese.
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This work was supported by a Grant for Specially Promoted Research from Kanazawa Medical University (SR2012-01).
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Arisawa, T., Tahara, T., Shiroeda, H. et al. Genetic polymorphisms of SCN10A are associated with functional dyspepsia in Japanese subjects. J Gastroenterol 48, 73–80 (2013). https://doi.org/10.1007/s00535-012-0602-3
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DOI: https://doi.org/10.1007/s00535-012-0602-3