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Novel discovery by Einstein scientists could lead to much-needed kidney failure treatment
Date:3/12/2008

March 12, 2008 (BRONX, NY) The unwanted activation of an important cell-signaling pathway may play a role in two kidney problems that are major causes of end-stage renal disease, scientists at the Albert Einstein College of Medicine of Yeshiva University have found. Their research, which opens up a novel approach for treating kidney failure, is described in the March issue of Nature Medicine. The study was led by Dr. Katalin Susztak, an assistant professor of medicine (nephrology) at Einstein.

The kidneys filter waste products from the blood and maintain the bodys fluid balance by producing urine. The filtration is carried out by numerous capillary tufts within the kidney known as glomeruli. Kidney disease occurs when glomeruli become damaged and can no longer perform their filtering function. Kidney damage may ultimately progress to end-stage renal disease, in which patients need dialysis or a kidney transplant.

The Einstein scientists focused on cells known as podocytes that line the glomeruli. Since dysfunction of podocytes cells is important in progressive kidney disease, and since a cell-signaling pathway called Notch is crucial in podocyte development, the Einstein researchers reasoned that aberrant Notch signaling might play a role in causing kidney disease.

The Notch signaling pathway plays a key role in embryonic development of humans and most other multicellular organisms. The Notch pathway tells some cells to proliferate and others to undergo programmed cell death as it profoundly affects the way tissues are organized. Faulty Notch signaling has been found in several types of cancer and in many other diseases such as multiple sclerosis.

Collectively, the observations made in the Einstein study offer strong evidence that aberrant Notch signaling is also involved in diabetic nephropathy (DNP) and focal segmental glomerulosclerosis (FSGS)two of the major causes of end-stage renal disease. For example:

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Contact: Karen Gardner
kgardner@aecom.yu.edu
718-430-3101
Albert Einstein College of Medicine
Source:Eurekalert

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