Navigation Links
Experimental drug may extend therapeutic window for stroke

LOS ANGELES A team led by a physician-scientist at the University of Southern California (USC) has created an experimental drug that reduces brain damage and improves motor skills among stroke-afflicted rodents when given with federally approved clot-busting therapy.

Clinical trials to test the safety of the drug in people are expected to start later this summer.

Stroke, which occurs when blood flow to a part of the brain stops, is the No. 4 cause of death and the leading cause of adult disability in the United States. According to the American Stroke Association, the Food and Drug Administration-approved tPA (tissue plasminogen activator) is the best treatment for stroke caused by a blocked artery, but to be effective, it must be administered within three hours after symptoms start. If given outside that three-hour window, tPA has shown serious side effects in animal and human brains, including bleeding and breakdown of the brain's protective barrier.

Generally, according to the American Stroke Association, only 3 to 5 percent of those who suffer a stroke reach the hospital in time to be considered for tPA treatment.

"What tPA does best is to break down clots in the blood vessel and restore blood flow, but it is a powerful enzyme," said Berislav V. Zlokovic, M.D., Ph.D., director of the Zilkha Neurogenetic Institute at the Keck School of Medicine of USC and the study's lead investigator. "After three hours, tPA also damages the blood vessel and causes intracerebral bleeding. We have developed something that not only counteracts the bleeding but also reduces brain damage and significantly improves behavior after stroke. I feel very strongly that this approach will extend the therapeutic window for tPA."

Zlokovic is the scientific founder of ZZ Biotech, a Houston-based biotechnology company he co-founded with USC benefactor Selim Zilkha to develop biological treatments for stroke and other neurological ailments. The company's 3K3A-APC is a genetically engineered variant of the naturally occurring activated protein C (APC), which plays a role in the regulation of blood clotting and inflammation. APC has cell-protecting, anti-inflammatory and anti-coagulant properties; 3K3A-APC has reduced anti-coagulant ability, which minimizes the risk of bleeding induced by normal APC. The protective effect of 3K3A-APC on the lining of blood vessels in the brain further helps prevent bleeding caused by tPA.

In collaboration with the University of Rochester Medical Center, Henry Ford Health Sciences Center, University of Arizona College of Medicine and The Scripps Research Institute, Zlokovic and his team gave tPA alone and in combination with 3K3A-APC to mice and rats four hours after stroke. They also gave 3K3A-APC for three consecutive days after stroke. They measured the amount of brain damage, bleeding and motor ability of the rodents up to seven days afterward.

The researchers found that, under those conditions, tPA therapy alone caused bleeding in the brain and did not reduce brain damage or improve motor ability when compared to the control. The combination of tPA and 3K3A-APC, however, reduced brain damage by more than half, eliminated tPA-induced bleeding and significantly improved motor ability.

"Dr. Zlokovic's study really demonstrates the promise of the drug and we are eager to show the same results in human clinical trials," said Kent Pryor, Ph.D., M.B.A., ZZ Biotech's chief operating officer.

Previous research suggests that the experimental drug may also protect against other neurological maladies such as amyotrophic lateral sclerosis and traumatic brain injury as a standalone therapy.

"We are encouraged by these results," said Joe Romano, CEO and president of ZZ Biotech. "In terms of improving treatment for stroke and other neurological diseases, this could be really exciting."


Contact: Alison Trinidad
University of Southern California - Health Sciences

Related medicine news :

1. Experimental Chemo Combo for Colon Cancer Disappoints
2. Experimental Pill for Multiple Sclerosis Shows Promise
3. Experimental Gel May Help Those With Advanced Parkinsons
4. Experimental Drug Eases Autistic Behaviors in Mice
5. Experimental Drug Helps Fight Some Childhood Cancers, Study Finds
6. Experimental drug improves muscle strength among male cancer patients
7. Experimental Vaccine Seems to Stop Nicotine Addiction in Mice
8. Content Writing King Announces Cancellation Of Experimental Video Creation Process For Their Article Marketing Website
9. Fertility preservation with cryopreservation of ovarian tissue: from experimental to mainstream
10. Healthy Behaviors Extend Life After Cancer, Experts Say
11. Exercise and a healthy diet of fruits and vegetables extends life expectancy in women in their 70s
Post Your Comments:
(Date:11/27/2015)... County, CA (PRWEB) , ... November 27, 2015 , ... ... season , The company is offering customers 10% off of their purchase of lice ... any treatment at full price. According to a company spokesperson. “Finding lice is a ...
(Date:11/27/2015)... , ... November 27, 2015 , ... ... the well-respected Microsoft Dynamics SL User Group (MSDSLUG). Recognized as Microsoft’s official group ... group of Microsoft Dynamics SL software users, partners, industry experts and representatives. Intellitec ...
(Date:11/27/2015)... ... November 27, 2015 , ... The men and women ... healthcare organizations in the country. They have overseen financial turnarounds, shown commitment to ... the healthcare industry as a whole through their advocacy and professional efforts. , ...
(Date:11/26/2015)... ... November 26, 2015 , ... Inevitably when people think Thanksgiving, they ... to buy during the Black Friday and Cyber Monday massage chair sales ... the Internet high and low to find the best massage chair deals, they can ...
(Date:11/26/2015)... TX (PRWEB) , ... November 26, 2015 , ... PRMA ... On November 19, 2015, our surgeons performed their 6,000th free flap breast reconstruction surgery! ... “We wake up every day excited to rebuild lives and it’s an honor to ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... 2015 ) ... "Radioimmunoassay Market by Type (Reagents & Kits, ... Clinical Diagnostic Labs), Application (Research, Clinical Diagnostics), ... report to their offering. --> ... of the "Radioimmunoassay Market by Type ...
(Date:11/25/2015)... -- The total global healthcare industry is expected to grow at ... America has the highest projected growth at 12.7%, ... ), is second with growth projected at 11.5%. ... expenditure. In 2013-2014, total government funded healthcare was nearly 68%. ... 41.2% in 2013-2014. In real terms, out of pocket expenditure ...
(Date:11/25/2015)... -- Linden Care, LLC, a retail specialty pharmacy focused on ... from chronic pain, said today that it is disappointed ... enjoining Express Scripts from unilaterally terminating the Pharmacy Provider ... --> The company said that it ... --> --> In the ...
Breaking Medicine Technology: