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UCSF unveils model for implantable artificial kidney to replace dialysis
Date:9/2/2010

UCSF researchers today unveiled a prototype model of the first implantable artificial kidney, in a development that one day could eliminate the need for dialysis.

The device, which would include thousands of microscopic filters as well as a bioreactor to mimic the metabolic and water-balancing roles of a real kidney, is being developed in a collaborative effort by engineers, biologists and physicians nationwide, led by Shuvo Roy, PhD, in the UCSF Department of Bioengineering and Therapeutic Sciences.

The treatment has been proven to work for the sickest patients using a room-sized external model developed by a team member in Michigan. Roy's goal is to apply silicon fabrication technology, along with specially engineered compartments for live kidney cells, to shrink that large-scale technology into a device the size of a coffee cup. The device would then be implanted in the body without the need for immune suppressant medications, allowing the patient to live a more normal life.

"This device is designed to deliver most of the health benefits of a kidney transplant, while addressing the limited number of kidney donors each year," said Roy, an associate professor in the UCSF School of Pharmacy who specializes in developing micro-electromechanical systems (MEMS) technology for biomedical applications. "This could dramatically reduce the burden of renal failure for millions of people worldwide, while also reducing one of the largest costs in U.S. healthcare."

The team has established the feasibility of an implantable model in animal models and plans to be ready for clinical trials in five to seven years.

End-stage renal disease, or chronic kidney failure, affects more than 500,000 people per year in the United States alone, and currently is only fully treated with a kidney transplant. That number has been rising between 5-7 percent per year, Roy said, in part because of the kidney damage associated with diabetes and hype
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Contact: Kristen Bole
kristen.bole@ucsf.edu
415-502-6397
University of California - San Francisco
Source:Eurekalert

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