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Double drug combo could shut down abnormal blood vessel growth that feeds disease
Date:9/10/2012

NEW YORK (September 10, 2012) -- A new study by researchers at Weill Cornell Medical College shows combining two already-FDA approved drugs may offer a new and potent punch against diseases in which blood vessel growth is abnormal -- such as cancer, diabetic retinopathy, macular degeneration and rheumatoid arthritis.

Their study, published in the Sept. 11 issue of the journal Developmental Cell, is the first to show that a protein, sphingosine 1-phosphate receptor-1 (S1P1), is a key player in angiogenesis -- the growth process of new blood vessels in the body from pre-existing vessels. S1P1, previously known to modulate immune system function, is the target of the approved drug fingolimod used to treat the autoimmune neurological disease multiple sclerosis.

Researchers have discovered that S1P1 works hand-in-hand with vascular endothelial growth factor (VEGF), which stimulates blood vessel growth. VEGF is the target of a number of different cancer drugs that have not proven to be as effective as originally envisioned in shutting down the excess blood vessels that provide nutrients to growing tumors and other diseases that rely on extra blood supply.

"The body needs to make new blood vessels that transport oxygen and blood. We now know that VEGF starts the process of sprouting new blood vessels from existing vessels, and S1P1 finishes it," says Dr. Timothy Hla, professor of pathology and laboratory medicine and director of the Center for Vascular Biology at Weill Cornell.

"Angiogenesis is abnormal in many diseases; by targeting both S1P1 and VEGF, it may be more effective to strike out disease than using just VEGF inhibitors alone," he says.

Not only are VEGF inhibitors currently used to treat cancer, these drugs are also used to block excessive angiogenesis in the eyes of diabetics and vascular proliferation that occurs in the wet form of age-related macular degeneration. "We are intrigued to see what the po
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Contact: Lauren Woods
law2014@med.cornell.edu
212-821-0560
New York- Presbyterian Hospital/Weill Cornell Medical Center/Weill Cornell Medical College
Source:Eurekalert

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