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Penn vet team uncovers a pathway that stimulates bone growth
Date:2/13/2013

PHILADELPHIA Researchers from the University of Pennsylvania School of Veterinary Medicine have discovered that a protein called Jagged-1 stimulates human stem cells to differentiate into bone-producing cells. This protein could help both human and animal patients heal from bone fractures faster and may form the basis of treatments for a rare metabolic condition called Alagille syndrome.

The study, published in the journal Stem Cells, was authored by three members of Penn Vet's departments of Clinical Studies-New Bolton Center and Animal Biology: postdoctoral researchers Fengchang Zhu and Mariya T. Sweetwyne and associate professor Kurt Hankenson, who also holds the Dean W. Richardson Chair in Equine Disease Research.

Last November, on the promise of these and other findings, Hankenson and his former doctoral student Mike Dishowitz launched a company, Skelegen, through Penn's Center for Technology Transfer UPstart program. Skelegen's focus is to continue to develop and improve a system for delivering Jagged-1 to sites that require new bone growth, in the hope of eventually treating bone fractures and other skeletal problems. Penn, through the CTT, has submitted a provisional patent application to protect the inventions of Hankenson and his colleagues.

Although human bones seem static and permanent, bone tissue actually forms and reforms throughout our lives. Cells called osteoblasts form bone and are derived from precursor cells known as mesenchymal stem cells, which are stored in bone marrow. These stem cells must receive specific signals from the body in order to become osteoblasts.

Prior research had identified a molecule called bone morphogenic protein, or BMP, as one of these proteins that drives stem cells to become bone-forming cells. As a result, BMP has been used clinically to help patients healing from broken bones or to perform spinal fusions without relying on patients' own bone tissue.

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Contact: Katherine Unger Baillie
kbaillie@upenn.edu
215-898-9194
University of Pennsylvania
Source:Eurekalert

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