TRPM8 polymorphisms associated with increased risk of IBS-C and IBS-M

Title of publication: 

TRPM8 polymorphisms associated with increased risk of IBS-C and IBS-M

Authors: 

Henström M, Hadizadeh F, Beyder A, Bonfiglio F, Zheng T, Assadi G, Rafter J, Bujanda L, Agreus L, Andreasson A, Dlugosz A, Lindberg G, Schmidt PT7, Karling P, Ohlsson B, Talley NJ, Simren M, Walter S, Wouters M, Farrugia G, D'Amato M.

Year of Publication: 

2016

medium resp. publishing house / place: 

Gut

edition / issue: 

14 Dec.

Pages: 

epub ahead of print

related to project: 

Recently in Gut, genetic variation affecting ion channels activity has been highlighted in relation to bowel function and the biology of stool frequency.1 It is also known that 2% of patients with IBS carry functional missense mutations in the voltage-gated channel NaV1.5 (SCN5A gene).2 Hence, channelopathies represent potential abnormalities underlying GI dysfunction and IBS. We inspected data from our previous genome-wide association study (GWAS) of IBS,3 in relation to 27 genes whose ion channel products contribute to GI sensorimotor development and function, visceral sensation and GI motility (see online supplementary table S1). Significant (uncorrected) results were detected for four genes (calcium voltage-gated channels CACNA1A and CACNA1E, and transient receptor potential channels TRPV3 and TRPM8; see online supplementary figure S1), which were selected for replication analyses in an independent set of IBS cases (N=386) and controls (N=357) (see online supplementary material methods). A sex-adjusted logistic regression analysis of genotype data from this cohort (see online supplementary material methods) detected significant associations for …