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Bone Res. 2017 May 09;5:17013. doi: 10.1038/boneres.2017.13. eCollection 2017.

Sclerostin activity plays a key role in the negative effect of glucocorticoid signaling on osteoblast function in mice.

Bone research

Eric E Beier, Tzong-Jen Sheu, Emily A Resseguie, Masahiko Takahata, Hani A Awad, Deborah A Cory-Slechta, J Edward Puzas

Affiliations

  1. Department of Environmental Medicine, University of Rochester, School of Medicine and Dentistry, Rochester, NY, USA.
  2. Department of Environmental and Occupational Medicine, Rutgers University, Piscataway, NJ, USA.
  3. Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, NY, USA.

PMID: 28529816 PMCID: PMC5422922 DOI: 10.1038/boneres.2017.13

Abstract

Stress during prenatal development is correlated with detrimental cognitive and behavioral outcomes in offspring. However, the long-term impact of prenatal stress (PS) and disrupted glucocorticoid signaling on bone mass and strength is not understood. In contrast, the detrimental effect of lead (Pb) on skeletal health is well documented. As stress and Pb act on common biological targets via glucocorticoid signaling pathways and co-occur in the environment, this study first sought to assess the combined effect of stress and Pb on bone quality in association with alterations in glucocorticoid signaling. Bone parameters were evaluated using microCT, histomorphometry, and strength determination in 8-month-old male mouse offspring subjected to PS on gestational days 16 and 17, lifetime Pb exposure (100 p.p.m. Pb in drinking water), or to both. Pb reduced trabecular bone mass and, when combined with PS, Pb unmasked an exaggerated decrement in bone mass and tensile strength. Next, to characterize a mechanism of glucocorticoid effect on bone, prednisolone was implanted subcutaneously (controlled-release pellet, 5 mg·kg

Conflict of interest statement

The authors declare no conflict of interest.

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