Vitamin-D binding protein does not enhance healing in rat bone defects: A pilot study

Jui Sheng Sun, Pei Yu Chen, Yang Hwei Tsuang, Ming Hong Chen, Po Quang Chen

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Vitamin D-binding protein (DBP) has an anabolic effect on the skeleton and reportedly enhances bone ingrowth. We used an in vivo critical bone defect model to determine whether local administration of DBP promotes bone defect healing. We created a 5-mm segmental bone defect in the radial shaft in a rat model. Forty-eight rats were assigned to eight groups: local application of 1 μg, 5 μg, 10 μg, or 50 μg DBP (DBP-1, DBP-5, DBP-10, DBP-50), autogenous bone marrow mononuclear cells with or without 10 μg DBP (BM-DBP-10, BM), 80 μg BMP-2 delivered in gelatin sponge (BMP-2), and the sham operated group. Radiographic evaluation, histological stains, and epifluorescence microscopy were performed. Grossly, all bone gaps of the BMP-2 group were solidly bridged by callus, while all those in the sham operated group remained unhealed by 9 weeks. Only one specimen of the BM-DBP-10 and DBP-50 groups and three specimens of the BM group were solidly healed; pseudarthroses occurred in all of the other specimens. Histological study and radiographs of the specimens showed similar results. We did not observe the enhanced bone healing reported in a previous study.

Original languageEnglish
Pages (from-to)3156-3164
Number of pages9
JournalClinical Orthopaedics and Related Research
Volume467
Issue number12
DOIs
Publication statusPublished - Dec 2009
Externally publishedYes

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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