Navigation Links
Researchers discover important link between adrenal gland hormone and brain in hypertension
Date:11/9/2010

DALLAS Nov. 9, 2010 A hormone already responsible for increasing blood pressure by prompting the kidneys to retain salt appears to moonlight as a major stimulator of the brain centers that control the vascular system and blood pressure.

Researchers at UT Southwestern Medical Center studied patients who overproduce aldosterone to see whether the hormone had any effect on sympathetic nerve activity responsible for blood pressure increases.

"Between 10 percent and 20 percent of patients with high blood pressure who are resistant to treatment have elevated aldosterone hormones," said Dr. Wanpen Vongpatanasin, associate professor of internal medicine at UT Southwestern and senior author of the study in the October issue of the Journal of Clinical Endocrinology & Metabolism. "Previous studies in animals showed that this hormone can affect many parts of the brain that control the cardiovascular system. We wanted to understand whether aldosterone also increases the nerve activity that causes constriction of blood vessels, which elevates blood pressure in humans.

"Since aldosterone can cause high blood pressure by affecting multiple systems and not just the kidneys, this study sheds light on why blood pressure is so difficult to control in patients with high aldosterone levels."

Aldosterone is an essential hormone that regulates electrolytes in the body. Created by the adrenal glands, it is responsible for re-absorption of sodium and water into the bloodstream and for regulating potassium. High levels of aldosterone can cause high blood pressure, muscle cramps and weakness.

Dr. Vongpatanasin and her team studied 14 hypertensive patients who overproduced aldosterone, a condition known as primary aldosteronism, and compared them with 20 hypertensive patients and 18 patients with normal blood pressure.

The data showed that in humans, aldosterone does increase activity in a part of the nervous system that raises blood pressure. Such activity contributes to the onset of hypertension. Furthermore, when the nerve activity was measured in patients who had adrenal surgery to remove tumors that produced this hormone, both nerve activity and blood pressure decreased substantially.

"Our study also suggested that treatment of hypertension in these patients not only requires targeting the kidneys but also the sympathetic nervous system that controls blood pressure," Dr. Vongpatanasin said. "Since our study shows that patients with high aldosterone levels have high nerve activity, future studies are needed to determine how we could prevent effects of aldosterone on the brain."


'/>"/>

Contact: LaKisha Ladson
lakisha.ladson@utsouthwestern.edu
214-648-3404
UT Southwestern Medical Center
Source:Eurekalert

Related medicine news :

1. Hebrew University researchers discover expanded role for cancer-causing gene
2. Researchers expand cyberspace to fight chronic condition in breast cancer survivors
3. Researchers led by St. Michaels Hospital receive grant to teach new method of CPR
4. Fox Chase researchers identify risk factors for the spread of breast cancer to lymph nodes
5. Mayo researchers find mortality rates from liver diseases underestimated
6. Inhaled steroids increase diabetes risk, say Lady Davis Institute researchers
7. Researchers develop successful method for extracting and archiving patient radiation dose info
8. Potential new treatment for deadly nipah and hendra viruses identified by Weill Cornell researchers
9. UM researchers are studying child-mother interactions to design robots with social skills
10. U of M researchers identify possible key to treating, understanding post-traumatic stress disorder
11. Tumor suppressor acts as oncogene in some cancers, say Mayo Clinic researchers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/2/2016)... ... , ... The annual time frame to change Medicare health and prescription drug ... 7th. Currently-enrolled Medicare beneficiaries who are looking to switch from their current plan to ... make changes during this period order for their new policy to go into effect ...
(Date:12/2/2016)... ... December 02, 2016 , ... More than half of American teens ... of parents report speaking with their child about sex related topics, less than 60 ... Mediaplanet is proud to announce the launch of its second edition of the “Sexual ...
(Date:12/2/2016)... , ... December 02, 2016 , ... Sourced from the ... some unique properties including its unmatched natural purity of just 6 ppm TDS (Total ... crisp. , Nothing Water has been available in several ShopRite and FoodTown stores in ...
(Date:12/2/2016)... , ... December 02, 2016 , ... ... meals to needy individuals and families from eight different sites throughout Miami-Dade and ... Day. Over 1,000 volunteers worked very hard on Thanksgiving morning by putting together ...
(Date:11/30/2016)... Northridge, CA (PRWEB) , ... November 30, 2016 ... ... Elyson, announce that they now offer a comprehensive in-house dental plan for all ... dentists have developed a plan that gives patients a number of perks, including ...
Breaking Medicine News(10 mins):
(Date:12/2/2016)... 2016  PipelineRx, a leading medication management technology ... demonstrations of its SaaS-based telepharmacy platform, PowerGridRx™ ... 2016 Midyear Clinical Meeting and Exhibition, December 5-7 ... nearly 300 hospital clients nationally, the Company is ... to dramatically improve pharmacy operations, enhance patient safety, ...
(Date:12/2/2016)... 2, 2016  Maxor National Pharmacy Services, LLC ("Maxor"), today ... Inc. ("PSI").  The combination of Texas -based ... -based PSI bring together both company,s clinical expertise and high-touch ... an industry-leading specialty pharmacy. About Maxor ... , , ...
(Date:12/2/2016)... 2016 Lianluo Smart Limited (Nasdaq: ... which develops, markets and sells medical devices and ... and international markets, recently attended the ... New Progress Forum, co-hosted by the Institute of ... , Guangdong Provincial People,s Hospital and Cardiology Department ...
Breaking Medicine Technology: