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UGA research offers new targets for stroke treatments
Date:12/20/2012

Athens, Ga. New research from the University of Georgia identifies the mechanisms responsible for regenerating blood vessels in the brain.

Looking for ways to improve outcomes for stroke patients, researchers led by the UGA College of Pharmacy assistant dean for clinical programs Susan Fagan used candesartan, a commonly prescribed medication for lowering blood pressure, to identify specific growth factors in the brain responsible for recovery after a stroke.

The results were published online Dec. 4 in the Journal of Pharmacology and Experimental Therapeutics.

Although candesartan has been shown to protect the brain after a stroke, its use is generally avoided because lowering a person's blood pressure quickly after a stroke can cause problemslike decreasing much-needed oxygen to the brainduring the critical period of time following a stroke.

"The really unique thing we found is that candesartan can increase the secretion of brain derived neurotrophic factor, and the effect is separate from the blood pressure lowering effect," said study coauthor Ahmed Alhusban, who is a doctoral candidate in the College of Pharmacy. "This will support a new area for treatments of stroke and other brain injury."

Alhusban and Fagan worked with Anna Kozak, a research scientist in the college, and Adviye Ergul, a professor and director of the physiology graduate program at Georgia Health Sciences University. They are the first to show that the positive effects of candesartan on brain blood vessel growth are caused by brain derived neurotrophic factor, or BDNF.

The research shows that when candesartan blocks the angiotensin II type 1 receptor, which lowers blood pressure, it stimulates the AT2 receptor and increases the secretion of BDNF, which encourages brain repair through the growth of new blood vessels.

"BDNF is a key player in learning and memory," said Fagan, the Albert W. Jowdy Professor. "A reductio
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Contact: Susan Fagan
sfagan@georgiahealth.edu
706-751-0130
University of Georgia
Source:Eurekalert

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