Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Experimental lupus drug may also work against atherosclerosis

18.10.2004


A drug that reduces symptoms of systemic lupus in mice may turn out to be effective against hardening of the arteries and thus prevent heart attacks, according to two poster presentations today at the American College of Rheumatology meeting in San Antonio.



Nilamadhab Mishra, M.D., of Wake Forest University Baptist Medical Center, said the drug, called Trichostatin A or TSA, "may have a therapeutic benefit in atherosclerosis," which causes coronary artery disease by blocking key arteries, leading to death and disability. Mishra, assistant professor of internal medicine – rheumatology, and his colleagues tested TSA on experimental mice that were bred to lack a significant natural protection against atherosclerosis. For 12 weeks, these mice were fed a diet that was both high in cholesterol and in which 10 percent of calories came from palm oil, one of the vegetable oils most likely to cause atherosclerosis. In addition to the coronary arteries, atherosclerosis also occurred in the aortic arch, part of one of the body’s main blood vessels.

When Mishra compared the mice given TSA with mice given an inert substance, the amount of atherosclerosis deposited in the aortic arch was cut in half. The TSA-treated mice also had a reduction in total and free cholesterol levels in the abdominal aorta, the lower portion of the aorta, the body’s largest blood vessel.


These mice had a three-fold reduction in the gathering of macrophages, a type of white blood cell. Scientists increasingly are viewing the depositing of cholesterol in the walls of arteries as an inflammatory reaction that attracts the disease-fighting macrophages, which then become incorporated with cholesterol deposits to become plaque.

"The recognition of atherosclerosis as an inflammatory disease raised the question of whether anti-inflammatory drugs might decrease this disease process," said Mishra, who noted that TSA is not only an anti-cancer and anti-lupus drug, but also an anti-inflammatory agent. TSA treatment changed the composition of the atherosclerotic deposit in a way that may lead to plaque stability, so pieces don’t break off so easily. The breaking off of plaques, which then can lodge elsewhere in already narrowed arteries, is a key mechanism for heart attacks and strokes.

Mishra got similar results when he tested TSA on another type of experimental mice that are also prone to atherosclerosis. He said a gene called CD154 causes both atherosclerosis and lupus. "This drug inhibits both."

Mishra’s team included John S. Parks, Ph.D., professor of pathology (comparative medicine), Anh Nghiem, B.S., Elene Boudyguina, B.S., and Doris R. Brown, Ph.D., all at Wake Forest Baptist, and Samantha Laclair. B.S., and Uwe Schonbeck, Ph.D., of Brigham and Women’s Hospital of Harvard Medical School in Boston.

Robert Conn | EurekAlert!
Further information:
http://www.wfubmc.edu

More articles from Life Sciences:

nachricht BigH1 -- The key histone for male fertility
14.12.2017 | Institute for Research in Biomedicine (IRB Barcelona)

nachricht Guardians of the Gate
14.12.2017 | Max-Planck-Institut für Biochemie

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.

To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

Im Focus: Successful Mechanical Testing of Nanowires

With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong

Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

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

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

Plasmonic biosensors enable development of new easy-to-use health tests

14.12.2017 | Health and Medicine

New type of smart windows use liquid to switch from clear to reflective

14.12.2017 | Physics and Astronomy

BigH1 -- The key histone for male fertility

14.12.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>