Navigation Links
Acid Reflux Drug May Cause Heart Disease

HOUSTON, July 10, 2013 /PRNewswire-USNewswire/ -- Drugs that help millions of people cope with acid reflux may also cause cardiovascular disease, report scientists from Houston Methodist Hospital and two other institutions in an upcoming issue of Circulation (now online). It is the first time researchers have shown how proton pump inhibitors, or PPIs, might cause cardiovascular problems. In human tissue and mouse models, the researchers found PPIs caused the constriction of blood vessels. If taken regularly, PPIs could lead to a variety of cardiovascular problems over time, including hypertension and a weakened heart. In the paper, the scientists call for a broad, large-scale study to determine whether PPIs are dangerous.

"The surprising effect that PPIs may impair vascular health needs further investigation," said John Cooke, M.D., Ph.D., the study's principal investigator. "Our work is consistent with previous reports that PPIs may increase the risk of a second heart attack in people that have been hospitalized with an acute coronary syndrome. Patients taking PPIs may wish to speak to their doctors about switching to another drug to protect their stomachs, if they are at risk for a heart attack."

Commonly used proton pump inhibitors in the United States are lansoprazole and omeprazole, and these drugs are purchasable over the counter as brands or generics. The FDA estimates about 1 in 14 Americans has used them. In 2009, PPIs were the third-most taken type of drug in the U.S., accounting for $13 billion in sales. PPIs are used to treat a wide range of disorders, including gastroesophageal reflux disease, or GERD, infection by the ulcer-causing Helicobacter pylori, Zollinger-Ellison syndrome, and Barrett's esophagus.

Recent studies of proton pump inhibitors use by people who've already experienced severe cardiovascular events have raised concern about the anti-reflux drugs, at least for this subgroup of patients, said Cooke, chair of the Department of Cardiovascular Sciences and director of the Center for Cardiovascular Regeneration at Houston Methodist DeBakey Heart & Vascular Center.

PPIs are initially inert. After oral consumption, they are activated by specialized cells in the stomach. Once active, the molecules suppress the movement of protons into the intestine, which reduces the amount of acid present there and in the stomach.

In mouse models and cultures of human endothelial cells, Cooke and lead author Yohannes Ghebremariam, Ph.D., found that PPIs suppressed the enzyme DDAH, dimethylarginine dimethylaminohydrolase. That caused an increase in the blood levels of ADMA (asymmetric dimethylarginine), an important chemical messenger. They found ADMA in turn suppressed the production of another chemical messenger, nitric oxide, or NO, proven by 1998 Nobel Prize winners Furchgott, Ignarro, and Murad to impact cardiovascular function. Quantitative studies in mouse models showed animals fed PPIs were more likely than controls to have tense vascular tissue.

"We found that PPIs interfere with the ability of blood vessels to relax," said Ghebremariam, a Houston Methodist molecular biologist. "PPIs have this adverse effect by reducing the ability of human blood vessels to generate nitric oxide. Nitric oxide generated by the lining of the vessel is known to relax, and to protect, arteries and veins."

The researchers found PPIs led to an approximately 25 percent increase in ADMA in mouse and tissue cultures, and reduced the ability of mouse blood vessels to relax by over 30 percent on average.

Also contributing to this report were Paea LePendu, Ph.D., Jerry Lee, Daniel Erlanson, Ph.D., and Nigam H. Shah, Ph.D. (Stanford University) and Anna Slaviero, Ph.D., and James Leiper, Ph.D. (Imperial College London). Work was funded with grants from the National Institutes of Health, the American Heart Association, the Stanford SPARK program, and the Stanford Translational Research and Applied Medicine (TRAM) program.

Circulation is published by the American Heart Association.

The Methodist Hospital recently changed its name to Houston Methodist Hospital.

To speak with Ghebremariam or Cooke, please contact David Bricker, Houston Methodist, at 832-667-5811 or

Media Contact: David Bricker Houston Methodist 832-667-5811

SOURCE Houston Methodist
Copyright©2012 PR Newswire.
All rights reserved

Related medicine technology :

1. Chef Spike Mendelsohn Dishes on How to Turn Down the Heat on Acid Reflux Disease
2. Capital Digestive Care Leads the Way in the Fight to Unmask Reflux Disease During National GERD Awareness Week
3. Breakthrough Procedure Provides Relief for Acid Reflux
4. Scott & White Hospital - Round Rock first in Central Texas, one of few nationally to perform breakthrough procedure for acid reflux
5. Avaxia Biologics is Awarded U.S. Patent for Method to Treat Radiation Damage to the Digestive Tract and Mucositis Caused by Radiation
6. PeaceHealth Laboratories New Patent Addresses a Leading Cause of Death: Prescription Drug Abuse
7. Clove Oil, a Natural Pesticide Used on Apples and Other Fruit, May Cause Dermatitis
8. Lilly Announces Study Results Regarding Postmenopausal Women with Back Pain Caused by Vertebral Fractures
9. Searcy Denney Scarola Barnhart & Shipley PA Seeks Damages Caused by Recalled Product
10. Adverse Events Caused by Urinary Catheterization Endanger Patients Health Costing the US Health Care System Billions
11. Philips continues to improve access to treatment for common cause of death in the U.S. with the delivery of its one-millionth AED
Post Your Comments:
(Date:11/27/2015)... , Nov. 27, 2015  Lannett Company, ... it has completed the acquisition of Kremers Urban ... subsidiary of global biopharmaceuticals company UCB S.A. (Euronext: ... Lannett has acquired KU from UCB for ... certain adjustments, including a customary working capital adjustment, ...
(Date:11/26/2015)... , 26 november 2015 ... kondigt de geplande investering aan van ten ... de laboratoria en het mondiale hoofdkantoor in ... uitbreiding zal resulteren in extra kantoorruimte en ... aan de groeiende behoeften van de farmaceutische ...
(Date:11/26/2015)... 2015 3D bioprinting market is ... a new report by Grand View Research Inc. Rising prevalence ... demands kidney transplantation is expected to boost the market growth, ... organ transplantation. --> 3D bioprinting market is ... a new report by Grand View Research Inc. Rising prevalence ...
Breaking Medicine Technology:
(Date:11/27/2015)... ... , ... According to an article published November 13th on, ... D.C. revolved around the fact that proper dental care, both at-home and in the ... between periodontal disease (more commonly referred to as gum disease) and diabetes. According to ...
(Date:11/27/2015)... NC (PRWEB) , ... November 27, 2015 , ... A ... effective ways to treat it. Surviving Mesothelioma has just posted the findings on ... at University Hospital Zurich analyzed the cases of 136 mesothelioma patients who were treated ...
(Date:11/27/2015)... ... November 27, 2015 , ... The print component of ... in Atlanta, Dallas, New York, Minneapolis, South Florida, with a circulation of approximately ... nationally, through a vast social media strategy and across a network of top ...
(Date:11/27/2015)... ... 27, 2015 , ... Intellitec Solutions announced today that they ... Recognized as Microsoft’s official group for end users of Dynamics SL ERP software, ... industry experts and representatives. Intellitec Solutions’ membership status demonstrates their ongoing commitment to ...
(Date:11/27/2015)... ... November 27, 2015 , ... CBD College is proud to announce ... (CAAHEP) awarded accreditation to its Diagnostic Medical Sonography program. CBD College is honored to ... of twelve colleges and universities in the state of California make the cut. CBD ...
Breaking Medicine News(10 mins):