Navigation Links
Common gene variants increase risk of hypertension, may lead to new therapies
Date:2/15/2009

A new study has identified the first common gene variants associated with an increased incidence of hypertension a significant risk factor for heart attack, stroke and kidney failure. The report receiving early online release in the journal Nature Genetics identifies variants in genes for proteins involved with cardiovascular response to stress that also appear to influence blood pressure levels, an association previously seen in animals but not demonstrated in humans.

"It's well known that hypertension can run in families, and a few rare genetic syndromes that raise blood pressure have been identified. But the common genetic basis for the type of hypertension that affects a billion individuals around the world has been very difficult to establish," says Christopher Newton-Cheh, MD, MPH of the Massachusetts General Hospital (MGH) Center for Human Genetic Research and Cardiovascular Research Center, first author of the Nature Genetics report.

To search for hypertension-associated variants, the investigators focused on two genes called NPPA and NPPB that are involved in the production of atrial and B-type natriuretic peptides (ANP and BNP) proteins known to relax blood vessels and to be involved in the excretion of dietary sodium. Animals in which both copies of NPPA have been knocked out are hypertensive, and even those with a single functional copy will develop hypertension on a high-sodium diet.

The overall study involved analyzing genetic data from almost 30,000 individuals. The researchers first screened 1,700 participants in the Framingham Heart Study for 13 common variations called single-nucleotide polymorphisms (SNPs) in the NPPA and NPPB genes, looking for any correlation with levels of ANP and BNP. SNPs identified in that first stage were validated in three other study groups, including participants from Sweden and Finland; and variants associated with changes in natriuretic peptide levels were then tested in the same individuals for any association with blood pressure levels.

Results of that third stage which suggested two hypertension-associated SNPs were validated in another study group. One identified variant, found in almost 90 percent of the population, was associated with a 20 percent reduction of ANP levels and an 18 percent greater incidence of hypertension. The other variant had a similar although less pronounced effect on ANP levels and blood pressure.

"Natriuretic peptides are known to be produced by the heart when it is stressed, and screening for peptide levels is widely used to diagnose heart failure, a condition in which they are sharply elevated," says senior author Thomas Wang, MD, of the MGH Cardiology Division. "It's currently premature to advocate screening natriuretic peptide levels or gene variants to diagnose hypertension risk, but someday it may be possible to treat natriuretic-peptide-deficient individuals with therapies that restore normal levels and reduce risk."

Newton-Cheh adds, "It's likely that many more genes will be found to contribute to changes in blood pressure, and the real challenge will be understanding the mechanism behind their effects. An advantage of these variants is that we know they act by influencing a well-studied pathway that may be modified with therapies that are currently being developed." He and Wang are both assistant professors of Medicine at Harvard Medical School and were co-corresponding authors on the paper.


'/>"/>

Contact: Sue McGreevey
smcgreevey@partners.org
617-724-2764
Massachusetts General Hospital
Source:Eurekalert

Related biology news :

1. New vaccine developed for preventing uncommon cold virus
2. Genetic testing not cost-effective in guiding initial dosing of common blood thinner
3. Common soil mineral degrades the nearly indestructible prion
4. Scientists uncover evolutionary keys to common birth disorders
5. Mayo Clinic: Brain disorder suggests common mechanism may underlie many neurodegenerative diseases
6. Common food additive found to increase risk and speed spread of lung cancer
7. Hairspray is linked to common genital birth defect, says study
8. GUMC researchers hone in on new strategy to treat common infection
9. First comprehensive genomic study of common cold reveals new treatment targets
10. Researchers identify Achilles heel of common childhood tumor
11. Study provides insight on a common heart rhythm disorder
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/15/2016)... -- Research and Markets has announced the ...  report to their offering.  ,      ... gait biometrics market is expected to grow at ... Gait analysis generates multiple variables such ... compute factors that are not or cannot be ...
(Date:3/31/2016)... , March 31, 2016   ... ("LegacyXChange" or the "Company") LegacyXChange is excited ... of its soon to be launched online site for ... https://www.youtube.com/channel/UCyTLBzmZogV1y2D6bDkBX5g ) will also provide potential shareholders a ... DNA technology to an industry that is notorious for ...
(Date:3/23/2016)... WAKEFIELD, Massachusetts , March 23, 2016 ... kombiniert im Interesse erhöhter Sicherheit Gesichts- und ... Xura, Inc. (NASDAQ: MESG ... heute bekannt, dass das Unternehmen mit SpeechPro ... insbesondere aus der Finanzdienstleistungsbranche, wird die Möglichkeit ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... 27, 2016  Liquid Biotech USA ... of a Sponsored Research Agreement with The University ... (CTCs) from cancer patients.  The funding will be ... correlate with clinical outcomes in cancer patients undergoing ... then be employed to support the design of ...
(Date:6/24/2016)... 2016  Regular discussions on a range of subjects including ... two entities said Poloz. Speaking at a lecture ... , he pointed to the country,s inflation target, which is ... "In certain areas there ... common economic goals, why not sit down and address strategy ...
(Date:6/24/2016)... Brooklyn, NY (PRWEB) , ... June 24, 2016 , ... ... 15mm, machines such as the Cary 5000 and the 6000i models are higher end ... height is the height of the spectrophotometer’s light beam from the bottom of the ...
(Date:6/23/2016)... ... June 23, 2016 , ... Mosio, a ... eBook, “Clinical Trials Patient Recruitment and Retention Tips.” Partnering with experienced clinical research ... by providing practical tips, tools, and strategies for clinical researchers. , “The landscape ...
Breaking Biology Technology: