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J Gastroenterol Hepatol. 2008 Jun;23(6):970-5. Epub 2007 Oct 11.

Cholecystokinin receptor A gene polymorphism in gallstone disease and gallbladder cancer.

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  • 1Departments of Genetics, Sanjay Gandi Post Graduate Institute of Medical Sciences, Lucknow, India.

Abstract

BACKGROUND AND AIM:

Gallbladder carcinoma (GBC) usually arises in the background of gallstone disease which may be causatively related to decreased gallbladder contractility. Cholecystokinin receptor A (CCK-AR) mediates signals resulting in gallbladder contraction. Deteriorating gallbladder contraction promotes gallstone formation. A common genetic polymorphism of CCK-AR may be causatively associated with the risk of gallstone and GBC. This study aimed to understand the association of CCK-AR Pst I polymorphism in gallstone disease with gallbladder cancer.

METHOD:

This study included 165 gallstone patients, 139 GBC patients, and 190 healthy subjects. Genotyping was done using the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method.

RESULTS:

The frequency of the A1A1 genotype of CCK-AR was significantly higher in gallstone patients than healthy individuals (P = 0.008 odds ratio [OR] = 2.25, and 95% confidence interval [CI]:1.2-4.1). However, there was a significant difference in the frequency of A1A1 genotype when gallstone patients were compared to GBC patients (P = 0.041, OR = 0.49, and 95% CI: 0.3-0.9). On stratification of GBC patients according to presence or absence of gallstones, GBC patients without stones were compared to controls and GBC patients with stones were compared to stone patients; however, no significant differences in frequencies were observed.

CONCLUSION:

The results suggest that the A1A1 genotype of CCK-AR is an independent genetic risk factor for gallstone disease and does not modulate the susceptibility of gallbladder cancer.

PMID:
17944886
[PubMed - indexed for MEDLINE]
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