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G-protein β3 subunit 825CC genotype is associated with postprandial distress syndrome with impaired gastric emptying and with the feeling of hunger in Japanese.
MedLine Citation:
PMID:  21902766     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Background  G-protein dysfunction related alteration of intracellular signal transduction might be linked to various abnormalities of functional gastrointestinal (GI) disorders. Serotonin (5-hydroxytryptamine; 5-HT) as well as G-protein is also key signaling molecule sensorimotor functions in the GI tract. Thus, this study aims to evaluate the correlation between gastric emptying and GNβ3 and 5-HTs polymorphisms in functional dyspepsia (FD) as defined by Rome III classification. Methods  Seventy-four patients presenting with typical symptoms of FD (epigastric pain syndrome: EPS, n = 24; postprandial distress syndrome: PDS, n = 51) and sixty-four healthy volunteers were enrolled. Gastric motility was evaluated with the T(max) value using the (13) C-acetate breath test. We used Rome III criteria to evaluate upper abdominal symptoms and SRQ-D scores to determine depression status. GNβ3-C825T, 5-HT(1A) -C1019G, 5-HT(2A) -G1438A, 5-HT(3A) -C42T, and 5-HT(4A) -G353 + 6A polymorphisms were analyzed in DNA from blood samples of enrolled subjects. Genotyping was performed by polymerase chain reaction. Key Results  There was a significant relationship (P = 0.045) between GNβ3 825CC genotype and PDS patients without gastro-esophageal reflux symptoms with impaired gastric emptying. In Japanese, GNβ3 825CC genotype in FD patients was significantly associated (P = 0.0485) with the feeling of hunger compared with GNβ3 825CT and TT genotypes. Conclusions & Inferences  Our results suggest that the GNβ3 825CC genotype is significantly associated with PDS patients without gastro-esophageal reflux with impairments of gastric emptying and also with the feeling of hunger in patients with FD. Further studies are needed to clarify whether the GNβ3 825CC genotype is linked to disturbances of gastric emptying via altered signal transduction responses.
Authors:
M Shimpuku; S Futagami; T Kawagoe; H Nagoya; T Shindo; A Horie; Y Kodaka; T Itoh; C Sakamoto
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-9-8
Journal Detail:
Title:  Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society     Volume:  -     ISSN:  1365-2982     ISO Abbreviation:  -     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-9-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9432572     Medline TA:  Neurogastroenterol Motil     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2011 Blackwell Publishing Ltd.
Affiliation:
Division of Gastroenterology, Department of Internal Medicine, Nippon Medical School, Tokyo, Japan Center for Information Sciences, Nippon Medical School, Tokyo, Japan.
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