• Submit to Cells Login Register
• MDPI
• Journals A-Z
• For Authors
• For Editors
• About
• Open Access Policy

• Abstract
• Full-Text PDF [4141 KB]
• Full-Text XML
• Article Versions Notes

• Article Statistics
• Google Scholar
• Order Reprints

• Cite this article
• Export to BibTeX
• Export to EndNote

• [+] on DOAJ
• Zhang, Q
• Miller, C
• Bible, J
• Li, J
• Xu, X
• Mehta, N
• Gilligan, J
• Vignery, A
• Scholz, JA. Carlson
• [+] on Google Scholar
• Zhang, Q
• Miller, C
• Bible, J
• Li, J
• Xu, X
• Mehta, N
• Gilligan, J
• Vignery, A
• Scholz, JA. Carlson
• [+] on PubMed
• Zhang, Q
• Miller, C
• Bible, J
• Li, J
• Xu, X
• Mehta, N
• Gilligan, J
• Vignery, A
• Scholz, JA. Carlson

•  CiteULike
•  Facebook
•  Mendeley
•  Twitter

This article is

• freely available
• re-usable

Cells 2012, 1(4), 1168-1181; doi:10.3390/cells1041168

Article

Additive Effects of Mechanical Marrow Ablation and PTH Treatment on de Novo Bone Formation in Mature Adult Rats

Qing Zhang ^1,2 , Christopher Miller ³ , Jesse Bible ³ , Jiliang Li ⁴ , Xiaoqing Xu ^1,2 , Nozer Mehta ⁵ , James Gilligan ⁵ , Agnès Vignery ^1,2,†  and Jodi A. Carlson Scholz ^6,†,*

¹ Department of Orthopaedics, Yale University School of Medicine, 310 Cedar Street, New Haven 06510, CT, USA ² Department of Cell Biology, Yale University School of Medicine, 310 Cedar Street, New Haven 06510, CT, USA ³ Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, 310 Cedar Street, New Haven 06510, CT, USA ⁴ Department of Biology, Indiana University Purdue University Indianapolis, 723 West Michigan Street, SL306, Indianapolis 46202, IN, USA ⁵ Unigene Laboratories, Inc. 81 Fulton Street, Boonton 07005, NJ, USA ⁶ Section of Comparative Medicine, Yale University School of Medicine, 310 Cedar Street, New Haven 06510, CT, USA ^† These authors contributed equally to this work.

* Author to whom correspondence should be addressed.

Received: 31 August 2012; in revised form: 9 October 2012 / Accepted: 14 October 2012 / Published: 5 December 2012

(This article belongs to the Special Issue Tissue and Organ Regeneration)

Download PDF Full-Text [4141 KB, uploaded 6 December 2012 08:36 CET]

Abstract: Mechanical ablation of bone marrow in young rats induces rapid but transient bone growth, which can be enhanced and maintained for three weeks by the administration of parathyroid hormone (PTH). Additionally, marrow ablation, followed by PTH treatment for three months leads to increased cortical thickness. In this study, we sought to determine whether PTH enhances bone formation after marrow ablation in aged rats. Aged rats underwent unilateral femoral marrow ablation and treatment with PTH or vehicle for four weeks. Both femurs from each rat were analyzed by X-ray and pQCT, then analyzed either by microCT, histology or biomechanical testing. Marrow ablation alone induced transient bone formation of low abundance that persisted over four weeks, while marrow ablation followed by PTH induced bone formation of high abundance that also persisted over four weeks. Our data confirms that the osteo-inducive effect of marrow ablation and the additive effect of marrow ablation, followed by PTH, occurs in aged rats. Our observations open new avenues of investigations in the field of tissue regeneration. Local marrow ablation, in conjunction with an anabolic agent, might provide a new platform for rapid site-directed bone growth in areas of high bone loss, such as in the hip and wrist, which are subject to fracture.

Keywords: PTH; mechanical marrow ablation; bone engineering; aging; site-directed bone formation

Article Statistics

Cite This Article