Navigation Links
Oh, rats! Designer animals reveal possible heart disease genes

Every year, heart disease claims an estimated 7 million lives, according to the World Health Organization. Scientists have struggled to pinpoint the precise genes behind this complex disease. Now, however, they have a new research ally: the designer rat.

In a four-year study published in the January 15 advance online publication of Nature Genetics, researchers at The Institute for Genomic Research (TIGR) and the Medical College of Wisconsin (MCW) systematically bred and studied 43 designer rats with and without high blood pressure, in order to pinpoint candidate genes behind heart disease. In total, the scientists built 2,200 microarray gene expression profiles from these designer rats--providing a valuable new online resource now available to researchers worldwide.

Scientists have long used rat models to study heart disease in the lab. But those studies have yet to answer key questions: Which genes, on which chromosomes, combine to cause this complex condition? Why, and how, do some animals become hypertensive when consuming high-salt diets, while others stay healthy? To turn the tools of genomics onto these questions, the National Heart, Lung, and Blood Institute, part of the National Institutes of Health, funded the new study.

In the first part of the study, MCW researchers began with a strain of rats bearing high blood pressure, a hallmark of heart disease. The researchers then bred an almost identical designer rat, with one important change: they substituted one chromosome from the parental, hypertensive rat with the homologous chromosome from a healthy rat. Continuing this way, the team generated 22 unique designer rat strains, each bearing one distinct healthy chromosome substitution. Some of these new designer rats were disease-free, implying that their replaced chromosomes carried genes for high blood pressure and related conditions.

In the second part of the study, TIGR molecular biologist Norman Lee led the team in using a DNA microarray technique to compare the expression of more than 22,000 genes among the hypertensive, healthy, and designer rats. By studying the physical characteristics and gene expression of more than 800 rats, the team identified candidate genes that may contribute to cardiovascular disease, including some genes not previously associated with the condition.

"This information offers an unprecedented amount of data for cardiovascular researchers to now mine," remarks Lee, senior author of the study. Lead author Renae Malek, also a molecular biologist at TIGR, notes that the data point to promising genes for salt-sensitive hypertension, among other conditions. The online database resulting from the study, dubbed TREX, is available free of charge at: http://pga.tigr.org/.

TIGR continues to study the panels of designer rat strains, and Lee hopes in the future to knock out specific candidate heart disease genes, directly testing their effects. "With all this information in hand, science is moving from a microscopic to global perspective of heart disease," Lee says. "This will generate research projects for years down the line."


'"/>

Source:The Institute for Genomic Research


Related biology news :

1. Designer babies - what would you do for a healthy baby?
2. Plants, animals share molecular growth mechanisms
3. Elephants imitate truck noises, other animals
4. Carnegie Mellon scientists develop tool that uses MRI to visualize gene expression in living animals
5. Gene therapy for Parkinsons disease moves forward in animals
6. Use of PET can reduce, may eliminate more strenuous drug development trials with animals
7. Undesirable expatriates: Preventing the spread of invasive animals
8. Two new retroviruses—transmitted from animals—identified
9. Stem cell therapy successfully treats heart attack in animals
10. More animals join the learning circle
11. Proposal would allow wild animals to roam North America
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/6/2017)... 2017 Forecasts by Product Type ... by End-Use (Transportation & Logistics, Government & Public Sector, ... Fossil Generation Facility, Nuclear Power), Industrial, Retail, Business Organisation ... Are you looking for a definitive report on the ... ...
(Date:4/4/2017)...   EyeLock LLC , a leader of iris-based ... Patent and Trademark Office (USPTO) has issued U.S. Patent ... an iris image with a face image acquired in ... 45 th issued patent. "The ... the multi-modal biometric capabilities that have recently come to ...
(Date:3/30/2017)... , March 30, 2017 Trends, opportunities ... (physiological and behavioral), by technology (fingerprint, AFIS, iris recognition, ... recognition, and others), by end use industry (government and ... immigration, financial and banking, and others), and by region ... , Asia Pacific , and ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... , ... October 11, 2017 , ... ... gene in its endogenous context, enabling overexpression experiments and avoiding the use of ... small RNA guides is transformative for performing systematic gain-of-function studies. , This ...
(Date:10/11/2017)... ... October 11, 2017 , ... ComplianceOnline’s Medical Device Summit is ... and 8th June 2018 in San Francisco, CA. The Summit brings together current and ... distinguished CEOs, board directors and government officials from around the world to address key ...
(Date:10/11/2017)... , Oct. 11, 2017  VMS BioMarketing, a leading provider ... nationwide oncology Clinical Nurse Educator (CNE) network, which will launch ... for communication among health care professionals to enhance the patient ... office staff, and other health care professionals to help women ... cancer. ...
(Date:10/11/2017)... ... , ... Disappearing forests and increased emissions are the main causes of the ... Especially those living in larger cities are affected by air pollution related diseases. , ... pollution-affected countries globally - decided to take action. , “I knew I had to ...
Breaking Biology Technology: