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New high-throughput screening method may uncover novel treatments for kidney disease

Date:
April 9, 2015
Source:
American Society of Nephrology (ASN)
Summary:
Researchers have developed a system that could be used to identify novel drug candidates that protect the function of the kidney cells that are damaged in patients with chronic kidney disease. One drug identified through the system effectively protected the kidney cells of rodents exposed to kidney damaging agents.
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A newly developed assay may help investigators identify novel drug candidates to protect kidney cells and prevent or treat chronic kidney disease (CKD). The advance is described in an upcoming issue of the Journal of the American Society of Nephrology (JASN).

CKD affects more than 13% of adults in the United States, with diabetes, hypertension and atherosclerosis being common risk factors. Most patients rely on antihypertensive medications for treatment, and there are no therapies available that directly and specifically target the kidney.

A team led by Vineet Gupta, PhD and Jochen Reiser, MD, PhD (Rush University Medical Center) has now developed a system that can be used to identify novel drug candidates that protect the function of kidney podocytes, cells that are critical for filtering the blood. Damage to these cells is a hallmark of CKD.

"A key barrier to the rational development of podocyte-directed therapeutics has been a lack of cell-based assays for use in high-throughput drug discovery environment," said Dr. Gupta. "Our report describes what we believe to be the first podocyte cell-based high content screening assay for the identification of novel podocyte-directed therapeutics in a high-throughput fashion."

Using the assay, which analyzes thousands of podocytes under different conditions in multi-well plates, the investigators identified 24 small molecules that protected podocytes against injury. When they treated mice and rats with one of the molecules, called pyrintegrin, the animals' podocytes remained healthy despite being exposed to damaging agents. Pyrintegrin activates β1 integrin, a protein that acts as a molecular bridge to help podocytes hold onto the outside of blood vessels and maintain the filtration apparatus in the kidney.

"We believe that this assay could provide the much needed boost in fueling the discovery and development of kidney directed therapeutics, development of which has significantly lacked in recent times," said Dr. Reiser.


Story Source:

Materials provided by American Society of Nephrology (ASN). Note: Content may be edited for style and length.


Journal Reference:

  1. H. W. Lee, S. Q. Khan, M. H. Faridi, C. Wei, N. J. Tardi, M. M. Altintas, H. A. Elshabrawy, S. Mangos, K. L. Quick, S. Sever, J. Reiser, V. Gupta. A Podocyte-Based Automated Screening Assay Identifies Protective Small Molecules. Journal of the American Society of Nephrology, 2015; DOI: 10.1681/ASN.2014090859

Cite This Page:

American Society of Nephrology (ASN). "New high-throughput screening method may uncover novel treatments for kidney disease." ScienceDaily. ScienceDaily, 9 April 2015. <www.sciencedaily.com/releases/2015/04/150409182618.htm>.
American Society of Nephrology (ASN). (2015, April 9). New high-throughput screening method may uncover novel treatments for kidney disease. ScienceDaily. Retrieved May 26, 2017 from www.sciencedaily.com/releases/2015/04/150409182618.htm
American Society of Nephrology (ASN). "New high-throughput screening method may uncover novel treatments for kidney disease." ScienceDaily. www.sciencedaily.com/releases/2015/04/150409182618.htm (accessed May 26, 2017).

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