Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

McMaster study contradicts reports of problems with blood-thinner

30.08.2010
New findings by McMaster University researchers contradict earlier reports that people with a certain genetic make-up don't benefit from the blood-thinner clopidogrel, also known as Plavix.

After researchers from the United States, France and Germany reported clopidogrel is less effective in some patients, the Food and Drug Administration (FDA) in the United States issued a black box warning to physicians on the drug's package insert.

"(Our findings) add a further layer of complexity to the FDA 'black box' warning and show that reported genetic variants have no effect in certain patient populations," said Dr. Guillaume Paré, lead researcher and assistant professor of pathology and molecular medicine at the Michael G. DeGroote School of Medicine.

Clopidogrel is the world's second best-selling prescription drug with global sales of more than $6 billion annually. It is used in 110 countries by millions of people to reduce the risk of heart attack and stroke.

Following the FDA's warning, clopidogrel became the focus of on-going debates within cardiology circles. Some American cardiologists initially called the FDA's actions irresponsible. Others complained they were left without any appropriate direction on how to manage their patients.

About 20 per cent of the population carry the loss-of-function version of the gene involved in the clopidogrel controversy.

To assess the influence genetics might have on patients prescribed clopidogrel, Paré and colleagues from McMaster University conducted a genetic sub-study of 6,000 participants from two major clinical trials (CURE and ACTIVE). The CURE (Clopidogrel in Unstable Angina to Prevent Recurrent Ischemic Events) trial of 12,562 patients with acute coronary syndrome in 28 countries found clopidogrel significantly reduces the risk of heart attack stroke and dying. The ACTIVE (Atrial Fibrillation Clopidogrel Trial with Irbesartan for the Prevention of Vascular Events) trial of 7,554 patients with atrial fibrillation in 30 countries found clopidogrel added to Aspirin significantly reduced the risk of cardiovascular events, and particularly stroke. Both trials were supported by Sanofi-Aventis and Bristol-Myers Squibb.

"We found the previously reported genetic variants had no effect at all (for patients) in either the CURE or ACTIVE trials," said Paré. He will present these findings at the European Cardiovascular Society Congress meeting in Stockholm, Sweden, on August 29. The study will also be simultaneously published online in the New England Journal of Medicine.

Paré said the positive results from McMaster's genetic sub-study come from studying different patient populations. "Also, our study design was a bit stronger from an epidemiology point of view."

Beyond clopidogrel, he said there is a broader message of the need for cautiousness as genetics becomes more and more integrated into patient care.

Laura Thompson | EurekAlert!
Further information:
http://www.mcmaster.ca

More articles from Studies and Analyses:

nachricht The Great Unknown: Risk-Taking Behavior in Adolescents
19.01.2017 | Max-Planck-Institut für Bildungsforschung

nachricht A sudden drop in outdoor temperature increases the risk of respiratory infections
11.01.2017 | University of Gothenburg

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Quantum optical sensor for the first time tested in space – with a laser system from Berlin

For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.

According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Tracking movement of immune cells identifies key first steps in inflammatory arthritis

23.01.2017 | Health and Medicine

Electrocatalysis can advance green transition

23.01.2017 | Physics and Astronomy

New technology for mass-production of complex molded composite components

23.01.2017 | Process Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>