Navigation Links
Why does aspirin increase the susceptibility of Helicobacter pylori to antimicrobials?

Resent studies reported that aspirin inhibited the growth of H. pylori in a dose-dependent manner and significantly affected the activity of virulence factors of H. pylori. In addition, aspirin increased the susceptibility of H. pylori to antimicrlbials including metronidazole, clarithromycin and amoxicillin. However, the mechanisms remained unknown.

A research team led by Prof. Wang from Peking University First Hospital of China addressed this issue and their results will be published on February 28, 2009 in the World Journal of Gastroenterology.

H. pylori reference strain 26695 and two metronidazole-resistant isolates of H. pylori were included in this study. The effect of aspirin on the permeability of the outer membrane of H. pylori was determined using [7-3H] tetracycline. The effects of aspirin on the expression of OMPs of H. pylori were also determined. Taqman-based real-time quantitative PCR was used to analyze the influence of aspirin on the expression of the related OMPs genes.

They found that the mutations in rdxA gene did not change in metronidazole resistant isolates treated with aspirin. The radioactivity of H. pylori increased when treated with aspirin, indicating that aspirin improved the permeability of the outer membrane of H. pylori. However, the expression of two OMP bands between 55 kDa and 72 kDa altered in the presence of aspirin. The expression of the mRNA of hopA, hopB, hopC, hopD, hopE and hefA, hefB, hefC of H. pylori did not change when treated with aspirin.

Their results indicated that although aspirin increases the susceptibility of H. pylori to metronidazole, it has no effect on the mutations of rdxA gene of H. pylori. Aspirin increases endocellular concentrations of antimicrobials and probably by altering the expression of the outer membrane proteins (OMP) of H. pylori. Their study will help understand the mechanisms of the resistance of H. pylori to antibiotics more intensively and discover a more effective eradication regimen in clinical practice.


Contact: Lai-Fu Li
World Journal of Gastroenterology

Related medicine news :

1. What is the most effective therapy for low-dose aspirin induced peptic ulcer?
2. Long-Term Aspirin Use Seems to Protect Against Colorectal Lesions
3. Human Body May Make Its Own Aspirin
4. Men who take aspirin have significantly lower PSA levels
5. Type 2 Diabetics Studied in Low-Dose Aspirin Trial
6. Aspirin Doesnt Guard Diabetics Against Heart Disease
7. Low-dose aspirin does not appear to reduce risk of CV events in patients with diabetes
8. Bayer Marketing Two Unapproved Aspirin Products: FDA
9. New CHARISMA Outcome Study Results Validate Aspirin Effect
10. Breakthrough Testing for Patients on Aspirin Therapy for Preventing Heart Attacks
11. Statement From Bayer(R) Aspirin Regarding the American Medical Associations New Aspirin Policy Resolution
Post Your Comments:
(Date:6/25/2016)... ... 2016 , ... Austin residents seeking Mohs surgery services, can now turn to ... Dr. Russell Peckham for medical and surgical dermatology. , Dr. Dorsey brings specialization to ... fellowship in Mohs Micrographic Surgery completed by Dr. Dorsey was under the direction of ...
(Date:6/25/2016)... ... 2016 , ... As a lifelong Southern Californian, Dr. Omkar Marathe earned his ... David Geffen School of Medicine at UCLA. He trained in Internal Medicine at Scripps ... in hematology/oncology at the UCLA-Olive View-Cedars Sinai program where he had the opportunity to ...
(Date:6/24/2016)... Los Angeles, CA (PRWEB) , ... June 24, 2016 , ... ... plastic surgery procedures that most people are unfamiliar with. The article goes on to ... known procedures, but also many of these less common operations such as calf and ...
(Date:6/24/2016)... ... June 24, 2016 , ... The Pulmonary Hypertension Association ... it will receive two significant new grants to support its work to advance ... 25th anniversary by recognizing patients, medical professionals and scientists for their work in ...
(Date:6/24/2016)... ... ... of Topricin and MyPainAway Pain Relief Products, join The ‘Business for a Fair Minimum Wage’ ... 2020 and then adjusting it yearly to increase at the same rate as the median ... floor does not erode again, and make future increases more predictable. , The company is ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... 2016 Research and Markets has announced ... report to their offering. ... a favourable commercial environment for MedImmune to enter. The US ... will serve to drive considerable growth for effective anti-influenza medications. ... cap sales considerably, but development is still in its infancy. ...
(Date:6/23/2016)...  Astellas today announced the establishment of Astellas Farma Colombia (AFC), a new affiliate with operations headquartered in ... . ... ... ... Astellas ...
(Date:6/23/2016)... , June 23, 2016 Research ... "Surgical Procedure Volumes: Global Analysis (United States, China, Japan, ... report to their offering. ... tool for healthcare business planners, provides surgical procedure volume ... surgery trends with an in-depth analysis of growth drivers ...
Breaking Medicine Technology: