Navigation Links
Multiple sclerosis -- antihypertensive drug ameliorate inflammation in the brain
Date:7/28/2010

Researchers in Heidelberg and Stanford have discovered a new signalling pathway of brain cells that explains how widely used antihypertensive drugs could keep inflammation in multiple sclerosis (MS) in check. The peptide angiotensin not only raises blood pressure but also activates the immunological messenger substance TGF beta on a previously unknown communication pathway in the brain. The study was conducted by Professor Lawrence Steinman at Stanford University in California together with the group of Professor Platten and published in the "Journal of Clinical Investigation". The Heidelberg team of researchers consisted of Dr. Tobias Lanz, lead author of the study and Professor Dr. Michael Platten, lead author of the previous study on that topic. Professor Platten is the senior consultant at the Department of Neurooncology at Heidelberg University Hospital and the head of the Helmholtz University Young Investigators Group "Experimental Neuroimmunology" at the German Cancer Research Center (DKFZ) in Heidelberg.

Angiotensin II is known as a molecule that regulates blood pressure. Drugs that block the angiotensin receptors, (AT1R blockers), are prescribed to millions of people to lower high blood pressure. These receptors have now also been found on numerous organs and cells that have nothing to do with regulating blood pressure, for example on the T cells of the immune system. These are immune cells that are involved in autoimmune reactions and chronic-inflammatory diseases such as MS. MS is characterized by multifocal areas of inflammation in the brain and spinal cord that lead to paralysis and other neurological symptoms.

Paralysis resolved in an animal model

The scientists working with Professor Platten showed in a mouse model that angiotensin II promotes inflammation in the brain and spinal cord. When the angiotensin receptors, i.e. the sites where angiotensin docks onto cells and can develop its effect, were blocked by the orally administered blood pressure drug Candesartan, the inflammation decreased and the paralysis resolved.

"Since AT1R blockers are frequently prescribed for lowering blood pressure and have a proven safety profile, it is an obvious step to test them soon in MS patients," says Platten. "Of course, in research it is important to search for specific drugs with new molecular targets. But in our study, we show that approved medications can also be successfully studied for benefits in other diseases. The potential use of these generic drugs with a proven safety profile would also have a great impact on reducing healthcare costs."

Protective mechanism works only in the central nervous system

The researchers know that angiotensin transfers its information to the cell via an increase in the messenger substance Transforming Growth Factor beta (TGF beta). Such a "network pathway" between angiotensin and TGF beta was previously unknown in the brain. TGF beta can have completely opposite effects on the one hand it regulates and alleviates inflammatory reactions, but in other situations it causes inflammation and promotes it. Which function the factor has depends on the surrounding tissue and the interaction with other messenger substances.

With respect to the whole body, TGF beta appears to protect the organism from inflammation and autoimmune diseases. Paradoxically however, blockage of TGF beta production in the brain leads to a reduction of inflammation and thus to an improvement in symptoms. "AT1R blockers prevent only the peak concentrations of TGF beta in the brain triggered by angiotensin, which are responsible for the inflammatory reaction. The baseline levels of TGF beta are not affected, so that the protective function for the rest of the body is apparently sustained," explained Platten.


'/>"/>

Contact: Prof. Dr. med. Michael Platten
michael.platten@med.uni-heidelberg.de
062-215-66804
University Hospital Heidelberg
Source:Eurekalert

Related medicine news :

1. Breast cancer cells regulate multiple genes in response to estrogen-like compounds
2. University at Buffalo launches clinical trial of new multiple sclerosis treatment
3. Clinical Trial Testing New Multiple Sclerosis Treatment to Launch in Buffalo
4. Cancer and Multiple Sclerosis Survivor Martin Smith's 3,000-mile Bicycle Ride Benefits Cancer Research
5. Can multiple sclerosis attacks be minimized in a war zone?
6. Quincy Bioscience Sponsors Multiple Sclerosis (MS) Scholarship Program
7. 96 percent of vasectomy patients cleared without need for multiple semen samples
8. Protein lets brain repair damage from multiple sclerosis, other disorders
9. Simple eye test measures damage from multiple sclerosis, UT Southwestern researchers find
10. Projects In Knowledge Launches Free iPhone App of Living Medical Textbook Neurology: Multiple Sclerosis 2010 Edition
11. $1.9 million grant to help UCF find multiple sclerosis nerve-ana
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/27/2016)... ... June 27, 2016 , ... ... professionals, announced today its affiliation with Tennessee Counseling Association. This new ... network of the Tennessee Counseling Association, adding exclusive benefits and promotional offers. , ...
(Date:6/26/2016)... ... ... On June 10-11, 2016, A Forever Recovery, a holistic treatment center for ... Table in Battle Creek, MI, where the rehabilitation facility is located. This annual celebration ... world’s leading providers of cereal and other breakfast foods. Its residents often refer to ...
(Date:6/25/2016)... ... June 25, 2016 , ... Experts from the American ... Annual Research Meeting June 26-28, 2016, at the Hynes Convention Center in Boston. ... including advance care planning, healthcare costs and patient and family engagement. , AIR ...
(Date:6/25/2016)... ... 25, 2016 , ... As a lifelong Southern Californian, Dr. Omkar Marathe earned ... the David Geffen School of Medicine at UCLA. He trained in Internal Medicine at ... fellowship in hematology/oncology at the UCLA-Olive View-Cedars Sinai program where he had the opportunity ...
(Date:6/24/2016)... ... , ... Those who have experienced traumatic events may suffer from a complex ... as drug or alcohol abuse, as a coping mechanism. To avoid this pain and ... a traumatic event. , Trauma sufferers tend to feel a range of emotions, from ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... , June 24, 2016   Bay Area ... Network,s Dean Center for Tick Borne Illness ... and Rehabilitation, MIT Hacking Medicine, University of California, ... today announced the five finalists of Lyme ... disease.  More than 100 scientists, clinicians, researchers, entrepreneurs, ...
(Date:6/24/2016)... , June 24, 2016 ... of the "Structural Electronics 2015-2025: Applications, Technologies, ... In-Mold Electronics, Smart Skin, ... Photovoltaics Structural electronics involves electronic ... load-bearing, protective structures, replacing dumb structures such as ...
(Date:6/24/2016)... Dehaier Medical Systems Ltd. (NASDAQ: DHRM ) ... medical devices and wearable sleep respiratory products in ... with Hongyuan Supply Chain Management Co., Ltd. (hereinafter referred ... to develop Dehaier,s new Internet medical technology business. ... Hongyuan Supply Chain,s sales platform to reach Dehaier,s dealers ...
Breaking Medicine Technology: