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Bacterial DNA in mixed cholesterol gallstones

Authors
 Dong Ki Lee  ;  Phillip I Tarr  ;  W Geoffrey Haigh  ;  Sum P Lee 
Citation
 AMERICAN JOURNAL OF GASTROENTEROLOGY, Vol.94(12) : 3502-3506, 1999 
Journal Title
 AMERICAN JOURNAL OF GASTROENTEROLOGY 
ISSN
 0002-9270 
Issue Date
1999
Abstract
OBJECTIVE: Numerous investigators have proposed a role for bacteria in biliary lithogenesis. We hypothesized that bacterial DNA is present in gallstones, and that categorical differences exist between gallstone type and the frequency of bacterial sequences. METHODS: Polymerase chain reaction (PCR) was used to amplify bacterial 16S rRNA and uidA (encoding Escherichia coli [E. coli]beta-glucuronidase) genes in different types of gallstones. PCR products were sequenced. RESULTS: Bacterial 16S rRNA and uidA DNA sequences in E. coli were detected in all brown pigment, common bile duct, and mixed cholesterol gallstones (n = 14). In contrast, only one (14%) of seven pure cholesterol gallstones yielded a PCR product. Most (88%) mixed cholesterol gallstones yielded PCR amplification products from their central, as well as their outer, portions. Sequenced products possessed 88–98% identity to 16S rRNA genes of E. coli and Pseudomonas species. CONCLUSIONS: Bacterial DNA sequences are usually present in mixed cholesterol (to 95% cholesterol content), brown pigment, and common bile duct, but rarely in pure cholesterol gallstones. The presence of bacterial beta-glucuronidase is also suggested. The role of bacteria and their products in the formation of mixed cholesterol gallstones, which comprise the majority of cholesterol gallstones, warrants further study.
Full Text
http://www.nature.com/ajg/journal/v94/n12/full/ajg1999817a.html
DOI
10.1111/j.1572-0241.1999.01614.x
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Lee, Dong Ki(이동기) ORCID logo https://orcid.org/0000-0002-0048-9112
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/144474
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