Directing mesenchymal stem cells to bone to augment bone formation and increase bone mass

Min Guan, Wei Yao, Ruiwu Liu, Kit Lam, Jan Nolta, Junjing Jia, Brian Panganiban, Liping Meng, Ping Zhou, Mohammad Shahnazari, Robert O. Ritchie, Nancy E Lane

Research output: Contribution to journalArticlepeer-review

180 Scopus citations

Abstract

Aging reduces the number of mesenchymal stem cells (MSCs) that can differentiate into osteoblasts in the bone marrow, which leads to impairment of osteogenesis. However, if MSCs could be directed toward osteogenic differentiation, they could be a viable therapeutic option for bone regeneration. We have developed a method to direct MSCs to the bone surface by attaching a synthetic high-affinity and specific peptidomimetic ligand (LLP2A) against integrin α4β1 on the MSC surface to a bisphosphonate (alendronate, Ale) that has a high affinity for bone. LLP2A-Ale induced MSC migration and osteogenic differentiation in vitro. A single intravenous injection of LLP2A-Ale increased trabecular bone formation and bone mass in both xenotransplantation studies and in immunocompetent mice. Additionally, LLP2A-Ale prevented trabecular bone loss after peak bone acquisition was achieved or as a result of estrogen deficiency. These results provide proof of principle that LLP2A-Ale can direct MSCs to the bone to form new bone and increase bone strength.

Original languageEnglish (US)
Pages (from-to)456-462
Number of pages7
JournalNature Medicine
Volume18
Issue number3
DOIs
StatePublished - Mar 2012

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

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