Featured Research

from universities, journals, and other organizations

Mutant Gene Identified As Villain In Hardening Of The Arteries

Date:
December 21, 2007
Source:
Yale University
Summary:
A genetic mutation promotes hardening of the arteries. The researchers found that mice engineered without the Akt1 gene and fed a high cholesterol diet had many more signs of aortic atherosclerosis compared to their littermates. And, surprisingly, their coronary lesions were similar to humans, say the scientists.

A genetic mutation expands lesions in the aorta and promotes coronary atherosclerosis, more commonly known as hardening of the arteries, according to a study by Yale School of Medicine in Cell Metabolism.

Related Articles


The researchers found that mice engineered without the Akt1 gene and fed a high cholesterol diet had many more signs of aortic atherosclerosis compared to their littermates. And, surprisingly, their coronary lesions were similar to humans, say the scientists.

"About 20 percent of the mice died spontaneously, perhaps due to an acute heart attack," said William Sessa, senior author of the study, professor of pharmacology, and director of Yale's vascular biology and therapeutics program.

Atherosclerosis is a chronic inflammatory response in arterial walls, in large part due to deposits of lipoproteins--which are plasma proteins that carry cholesterol and triglycerides. The "hardening" or "furring" of the arteries is caused by plaque formation.

In the vascular wall, Akt plays an important role in regulating the development of endothelial cells, which line the entire circulatory system, from the heart to the smallest capillary. Endothelial cells play an important role in regulating blood pressure, in blood clotting, in plaque formation in the arteries, and in formation of new blood vessels.

"The major finding of this study is that an absence of Akt1 aggravates atherosclerotic lesions, promotes coronary atherosclerosis, and may be a model of acute coronary syndromes," Sessa said. "Specific activation of Akt1 may provide a therapeutic approach to decrease formation of lesions in the arterial wall and promote plaque stabilization to prevent an acute heart attack."

One concern, he said, is that specific drugs are being developed to inhibit Akt in cancer patients to reduce progression of tumors, and that these drugs may also promote hardening of the arteries.

Cell Metabolism 6: 446-457 (December 2007). Co-authors include Carlos Fernandez-Hernando, Eric Ackah, Jun Yu, Yajaira Suarez, Takahisa Murata, Yasuko Iwakiri, Jay Prendergast, and Robert Miao, of Yale, and Morris Birnbaum of the Howard Hughes Medical Institute and the University of Pennsylvania School of Medicine.


Story Source:

The above story is based on materials provided by Yale University. Note: Materials may be edited for content and length.


Cite This Page:

Yale University. "Mutant Gene Identified As Villain In Hardening Of The Arteries." ScienceDaily. ScienceDaily, 21 December 2007. <www.sciencedaily.com/releases/2007/12/071218113455.htm>.
Yale University. (2007, December 21). Mutant Gene Identified As Villain In Hardening Of The Arteries. ScienceDaily. Retrieved October 23, 2014 from www.sciencedaily.com/releases/2007/12/071218113455.htm
Yale University. "Mutant Gene Identified As Villain In Hardening Of The Arteries." ScienceDaily. www.sciencedaily.com/releases/2007/12/071218113455.htm (accessed October 23, 2014).

Share This



More Health & Medicine News

Thursday, October 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola Fears Keep Guinea Hospitals Empty

Ebola Fears Keep Guinea Hospitals Empty

AP (Oct. 23, 2014) Fears of Ebola are keeping doctors and patients alike away from hospitals in the West African nation of Guinea. (Oct. 23) Video provided by AP
Powered by NewsLook.com
Orthodontist Mom Jennifer Salzer on the Best Time for Braces

Orthodontist Mom Jennifer Salzer on the Best Time for Braces

Working Mother (Oct. 22, 2014) Is your child ready? Video provided by Working Mother
Powered by NewsLook.com
U.S. Issues Ebola Travel Restrictions, Are Visa Bans Next?

U.S. Issues Ebola Travel Restrictions, Are Visa Bans Next?

Newsy (Oct. 22, 2014) Now that the U.S. is restricting travel from West Africa, some are dropping questions about a travel ban and instead asking about visa bans. Video provided by Newsy
Powered by NewsLook.com
More People Diagnosed With TB In 2013, But There's Good News

More People Diagnosed With TB In 2013, But There's Good News

Newsy (Oct. 22, 2014) The World Health Organizations says TB numbers rose in 2013, but it's partly due to better detection and more survivors. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins