Scientists at University of California San Francisco are working on a new approach to treating kidney failure that could one day free people from needing dialysis or having to take harsh drugs to suppress their immune system after a transplant. They have shown for the first time that kidney cells — housed in an implantable device called a bioreactor — can survive inside the body of a pig and mimic several important kidney functions. The device can work quietly in the background, like a pacemaker, and doesn't trigger the recipient’s immune system to go on the attack. The findings, published in Nature Communications on August 29, 2023, are an important step forward for The Kidney Project, which is jointly headed by UCSF’s Shuvo Roy, PhD (technical director) and Vanderbilt University Medical Center’s William H. Fissell, MD (medical director). Eventually, scientists plan to fill the bioreactor with different kidney cells that perform vital functions like balancing the body’s fluids and releasing hormones to regulate blood pressure, then pair it with a device that filters waste from the blood. The aim is to produce a human-scale device to improve on dialysis, which keeps people alive after their kidneys fail but is a poor substitute for having a real working organ. More than 500,000 people in the U.S. require dialysis several times a week. Many seek kidney transplants, but there are not enough donors, and only about 20,000 people receive them each year. An implantable artificial kidney would be a boon.
