Today, we would like to highlight a recent study in which researchers show a way to selectively accelerate bone regeneration. They have achieved this by delivering Jagged-1 to injuries instead of the bone morphogenetic proteins (BMPs) that have been traditionally used.

What is jagged-1?

Jagged-1 is an osteoinductive protein that activates the Notch signaling pathway, which regulates bone healing at the site of injury. Osteoinduction is the process by which osteogenesis is induced.

Osteoinduction involves recruiting immature cells and stimulating them to change into preosteoblasts. In a bone healing situation, such as during a fracture, the majority of bone healing depends on osteoinduction.

The new technique avoids the issues of inappropriate or excessive bone growth because, unlike BMPs, it targets osteoinductive mechanisms that are more directly associated with the regenerative process.

Testing their hypothesis

The researchers led by Kurt Hankenson, D.V.M., Ph.D., a professor of orthopedic surgery at Michigan Medicine, hypothesized for some years that by binding Jagged-1 to a biomaterial structure and delivering it to the site of injury, it could improve healing of the bone.

The published study results confirm this to be the case[1]. Mice and rats that were given Jagged-1, applied using a wet collagen sponge, saw improvements to both femoral and skull injuries. In contrast, the rodents treated with BMPs benefited but also experienced problematic bone hypertrophy, which is also observed in humans using BMPs.

The findings of this study suggest that the use of Jagged-1 for location-specific bone injury could potentially be developed into a therapy to help people recover from fractures and broken bones.


The use of signal molecules rather than drugs to encourage tissue regeneration is likely to increase in popularity in the coming years as the process becomes increasingly refined. This study is yet another example of how researchers are exploring the use of signalling molecules produced naturally in the body as an alternative to drug approaches, which can often have unwanted side effects. It should prove interesting to see how this approach develops in the next few years.


[1] Youngstrom, D. W., Senos, R., Zondervan, R. L., Brodeur, J. D., Lints, A. R., Young, D. R., … & Loomes, K. M. (2017). Intraoperative delivery of the Notch ligand Jagged-1 regenerates appendicular and craniofacial bone defects. NPJ Regenerative medicine, 2(1), 32.

About the author

Steve Hill

Steve serves on the LEAF Board of Directors and is the Editor in Chief, coordinating the daily news articles and social media content of the organization. He is an active journalist in the aging research and biotechnology field and has to date written over 500 articles on the topic as well as attending various medical industry conferences. In 2019 he was listed in the top 100 journalists covering biomedicine and longevity research in the industry report – Top-100 Journalists covering advanced biomedicine and longevity created by the Aging Analytics Agency. His work has been featured in H+ magazine, Psychology Today, Singularity Weblog, Standpoint Magazine, and, Keep me Prime, and New Economy Magazine. Steve has a background in project management and administration which has helped him to build a united team for effective fundraising and content creation, while his additional knowledge of biology and statistical data analysis allows him to carefully assess and coordinate the scientific groups involved in the project. In 2015 he led the Major Mouse Testing Program (MMTP) for the International Longevity Alliance and in 2016 helped the team of the SENS Research Foundation to reach their goal for the OncoSENS campaign for cancer research.
  1. February 16, 2018

    This technique using ultrasound gene therapy is also an interesting advance:

    • mm
      February 18, 2018

      It is indeed. Lots of advances happening now.

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