Current Osteoporosis Reports

, Volume 11, Issue 2, pp 117–125 | Cite as

Functional Impairment of Bone Formation in the Pathogenesis of Osteoporosis: The Bone Marrow Regenerative Competence

  • Joseph P. Bidwell
  • Marta B. Alvarez
  • Mark HoodJr
  • Paul Childress
Skeletal Biology (DB Burr, Section Editor)

Abstract

The skeleton is a high-renewal organ that undergoes ongoing cycles of remodeling. The regenerative bone formation arm ultimately declines in the aging, postmenopausal skeleton, but current therapies do not adequately address this deficit. Bone marrow is the primary source of the skeletal anabolic response and the mesenchymal stem cells (MSCs), which give rise to bone matrix-producing osteoblasts. The identity of these stem cells is emerging, but it now appears that the term ‘MSC’ has often been misapplied to the bone marrow stromal cell (BMSC), a progeny of the MSC. Nevertheless, the changes in BMSC phenotype associated with age and estrogen depletion likely contribute to the attenuated regenerative competence of the marrow and may reflect alterations in MSC phenotype. Here we summarize current concepts in bone marrow MSC identity, and within this context, review recent observations on changes in bone marrow population dynamics associated with aging and menopause.

Keywords

Aging Mesenchymal stem cells Nmp4 Osteoblasts Osteoprogenitors Postmenopause 

Notes

Conflict of Interest

JP Bidwell has a research grant pending from Eli Lilly. JP Bidwell declares no conflicts of interest. MB Alvarez declares no conflicts of interest. M Hood Jr declares no conflicts of interest. P Childress declares no conflicts of interest.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Joseph P. Bidwell
    • 1
  • Marta B. Alvarez
    • 1
  • Mark HoodJr
    • 1
  • Paul Childress
    • 1
  1. 1.Department of Anatomy and Cell BiologyIndiana University School of Medicine (IUSM)IndianapolisUSA

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