Recurrence of gallstones after cholecystectomy is associated with ABCG5/8 genotype

Area of Science:

• Gastroenterology
• Genetics
• Biliary System Physiology

Background:

• Gallstone disease is a prevalent and costly condition, with cholecystectomy being a frequent surgical procedure worldwide.
• Gallstone recurrence post-cholecystectomy can lead to serious complications like biliary sepsis and pancreatitis.
• The ABCG8-D19H variant is recognized as a key genetic risk factor for gallstone disease.

Purpose of the Study:

• To investigate the association between the ABCG8-D19H genetic variant and the recurrence of gallstones after cholecystectomy.
• To determine if ABCG8-D19H is a significant predictor of long-term postoperative biliary complications.

Main Methods:

• A cohort of 1,915 patients with available clinical and genetic data from a prior gallstone risk factor study was analyzed.
• Symptomatic gallstone recurrence was defined as occurring more than six months post-surgery, with a median follow-up of eight years.
• Multivariate logistic regression analysis was employed, adjusting for age, sex, BMI, and surgical type.

Main Results:

• Gallstones recurred in 1.9% (37 patients) of the study cohort.
• The ABCG8-D19H variant showed a significant association with gallstone recurrence (p = 0.034), with an allelic odds ratio of 1.97.
• ABCG8-D19H remained a significant predictor in multivariate analyses (p = 0.024 in the total cohort, p = 0.020 in a subgroup).

Conclusions:

• The ABCG8-D19H genetic variant is a significant predictor of gallstone recurrence following cholecystectomy.
• This association underscores the importance of the sterolin transporter in the pathophysiology of gallstone formation.
• Identifying genetic risk factors like ABCG8-D19H may aid in predicting and managing long-term postoperative biliary complications.