About My Health Careers Internship MedBlogs Contact us
Medindia LOGIN REGISTER
Advertisement

New Findings on Bacteria Linked to Stomach Disorders

by Thilaka Ravi on May 8, 2013 at 7:53 PM
Font : A-A+

New Findings on Bacteria Linked to Stomach Disorders

Two genome-wide association studies followed by a meta-analysis have found that certain genetic variations are associated with susceptibility to Helicobacter pylori, a bacteria that is a major cause of gastritis and stomach ulcers and is linked to stomach cancer. The findings may help explain some of the observed variation in individual risk for H pylori infection, reveals the study in the May 8 issue of JAMA.

"[H pylori] is the major cause of gastritis (80 percent) and gastroduodenal ulcer disease (15 percent-20 percent) and the only bacterial pathogen believed to cause cancer," according to background information in the article. "H pylori prevalence is as high as 90 percent in some developing countries but 10 percent of a given population is never colonized, regardless of exposure. Genetic factors are hypothesized to confer H pylori susceptibility."

Advertisement

Julia Mayerle, M.D., of University Medicine Greifswald, Greifswald, Germany, and colleagues conducted a study to identify genetic loci associated with H pylori seroprevalence. Two independent genome-wide association studies (GWASs) and a subsequent meta-analysis were conducted for anti-H pylori immunoglobulin G (IgG) serology in the Study of Health in Pomerania (SHIP) (recruitment, 1997-2001 [n =3,830]) as well as the Rotterdam Study (RS-I) (recruitment, 1990-1993) and RS-II (recruitment, 2000-2001 [n=7,108]) populations. Whole-blood RNA gene expression profiles were analyzed in RS-III (recruitment, 2006-2008 [n = 762]) and SHIP-TREND (recruitment, 2008-2012 [n=991]), and fecal H pylori antigen in SHIP-TREND (n=961).

Of 10,938 participants, 6,160 (56.3 percent) were seropositive for H pylori. GWAS meta-analysis identified an association between the gene TLR1 and H pylori seroprevalence, "a finding that requires replication in non-white populations," the authors write.
Advertisement

"At this time, the clinical implications of the current findings are unknown. Based on these data, genetic testing to evaluate H pylori susceptibility outside of research projects would be premature."

"If confirmed, genetic variations in TLR1 may help explain some of the observed variation in individual risk for H pylori infection," the researchers conclude.

Editorial: Helicobacter pylori Susceptibility in the GWAS Era

In an accompanying editorial, Emad M. El-Omar, M.D., of Aberdeen University, Aberdeen, United Kingdom, writes that the authors of this study are appropriate to state, "based on their data, genetic testing to evaluate H pylori susceptibility is premature."

"This would be superfluous, because nongenetic testing for the infection can be accomplished at a fraction of the cost. There is a bigger picture: understanding genetic susceptibility to H pylori is essential for understanding how to overcome this infection. The current approach to eradication of the infection is limited and based entirely on prescribing a cocktail of antibiotics with an acid inhibitor to symptomatic individuals. However, H pylori antibiotic resistance is increasing steadily, and eventually curing even benign conditions such as peptic ulcer disease arising from H pylori will be difficult. When considering gastric cancer, another H pylori-induced global killer, the necessity for understanding the pathogenesis of the infection and the role of host genetics in susceptibility is even greater. The corollary is that better understanding of infections, including genetic epidemiology, is crucial to design measures to eradicate the downstream consequences of H pylori in large populations."

Source: Eurekalert
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Advertisement
News Category
What's New on Medindia
Turmeric: Magic Ingredient to Keep you Healthy in Winter
Top 7 Benefits of Good Oral Hygiene
Healthy and Safer Thanksgiving 2021
View all

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.

More News on:
Shigellosis MRSA - The Super Bug Food Safety for Health Antibiotics COX - 2 Inhibitors 

Recommended Reading
Digestive Tract Ulcers Symptom Evaluation
A break in the mucus membrane lining of the digestive tract results in ulcers....
Peptic Ulcer
Encyclopedia section of medindia gives general information about Peptic Ulcer...
Acid Peptic Disease
Acid peptic diseases are a collective disorder affecting millions of people worldwide. A general ......
Antibiotics
Antibiotics are among the most used and abused medications. This article explains some general featu...
COX - 2 Inhibitors
What are COX–2 Inhibitors? Why are they safer compared to NSAIDs and which conditions are best trea...
MRSA - The Super Bug
MRSA infection is the most dreaded hospital or community acquired infection that can become ......
Shigellosis
Shigellosis or Bacillary Dysentery is a common cause of gastro-enteritis worldwide and can cause blo...

Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

© All Rights Reserved 1997 - 2021

This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use