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Acologix AC-200 Demonstrates Positive Effect on Bone in Preclinical Model of Chronic Kidney Disease
Date:11/7/2008

Data Presented at the 41st Annual Meeting of the American Society of

Nephrology

HAYWARD, Calif., Nov. 7 /PRNewswire-FirstCall/ -- Acologix, Inc., a privately held biopharmaceutical company, will present data indicating that its therapeutic product candidate AC-200 improved bone architecture in a rat model of chronic kidney disease. AC-200, an endogenous human protein produced by bone cells, was evaluated in a well accepted rodent model of chronic kidney disease (CKD) in which bone loss is rapid and substantial. The data will be presented by David Rosen, Ph.D on November 8, 2008 at the 41st ASN (American Society of Nephrology) Annual Meeting in Philadelphia, PA.

The effects of AC-200 on bone and mineral metabolism were evaluated in partially nephrectomized rats (5/6 Nx). These rats have reduced renal function which leads to elevated levels of serum phosphate and parathyroid hormone (PTH). Bone loss is an important feature of the model, similar to renal osteodystrophy seen in CKD patients. Recombinant AC-200 (MEPE: Matrix Extracellular Phosphoglycoprotein) or vehicle control were administered for 14 days by intravenous injections to 5/6 Nx rats. Serum and urine biochemistry assays were performed to determine the effects on renal function and mineral metabolism. Femurs were analyzed by X-ray and histology to determine effects on both cortical and trabecular bone.

AC-200 administration resulted in marked reductions in serum phosphorus and PTH levels compared to those in vehicle treated controls. The vehicle treated 5/6Nx group showed the expected changes in bone architecture due to the loss of kidney function, such as thinner trabecular bone in the metaphysis, increased cortical bone resorption and increased fibrosis in the marrow space. In contrast, in rats administered AC-200, bone architecture resembled that of sham operated controls. These data suggest that AC-200 offers a unique dual benefit in CKD, pot
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SOURCE Acologix, Inc.
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