Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

VCU research shows Viagra prevents anti-cancer drug induced heart damage

06.04.2005


Circulation article describes Viagra’s ability to stabilize



Virginia Commonwealth University researchers have found that the popular impotence drug Viagra prevents damage to the heart from a potent chemotherapeutic agent frequently used in the treatment of breast cancer, leukemia and sarcomas.

In the April 5 issue of Circulation: Journal of the American Heart Association, researchers demonstrated for the first time that administration of clinically relevant doses of Viagra, generically known as sildenafil citrate, one-hour prior to the administration of the anti-cancer drug doxorubicin (DOX) prevented heart damage at the cellular level. The research also showed that the impotence drug also prevented dilated cardiomyopathy and heart failure in a chronic mouse model. Furthermore, researchers observed a reduction of DOX-induced cell death, an improvement of heart function, and a reduction of electrophysiological abnormalities associated with heart sickness.


"Our research holds promise for the potential use of sildenafil in patients receiving DOX as part of their chemotherapeutic regimen with the goal of reducing the incidence of DOX cardiomyopathy," said the lead author of the study, Rakesh C. Kukreja, Ph.D., professor of medicine, physiology and biochemistry at VCU.

"Viagra stabilizes the mitochondria and protects against free-radical damage of the mitochondria and heart dysfunction caused by treatment with DOX by opening the mitochondrial KATP channels in cardiac cells," said Kukreja.

Mitochondria are cellular organelles critical for converting oxygen into ATP, the key fuel for cellular function. According to Kukreja, free radicals generated in the mitochondria of cardiac cells by DOX lead to the break down of regular cellular function, resulting in programmed cardiac cell death. Over time, cell death has been linked to decreased heart function or heart failure.

DOX is an effective chemotherapeutic agent commonly used in the treatment of many blood and solid tumor malignancies. Despite DOX’s clinical efficacy for treatment of cancer, its use is associated with a delayed and progressive cardiomyopathy, often presenting several years after treatment cessation.

"Viagra is able to protect the heart from damage that would otherwise disrupt normal cellular functioning," Kukreja said.

Kukreja and his colleagues began studying sildenafil in 2002 as part of ongoing research into "preconditioning," a way to protect the heart muscle from serious damage in the future by subjecting it to very brief periods of deprivation of blood flow and, therefore, oxygen. In papers published in the September 2002 issue of the American Journal of Physiology and the March 2003 issue of Circulation Research, Kukreja and his colleagues observed a powerful, protective effect of Viagra in the heart during experimental heart attacks in animal models.

Anne Buckley | EurekAlert!
Further information:
http://www.vcu.edu

More articles from Health and Medicine:

nachricht How cancer metastasis happens: Researchers reveal a key mechanism
19.01.2018 | Weill Cornell Medicine

nachricht Researchers identify new way to unmask melanoma cells to the immune system
17.01.2018 | Duke University Medical Center

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

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

Im Focus: Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.

We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Let the good tubes roll

19.01.2018 | Materials Sciences

How cancer metastasis happens: Researchers reveal a key mechanism

19.01.2018 | Health and Medicine

Meteoritic stardust unlocks timing of supernova dust formation

19.01.2018 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>