Journal
JOURNAL OF DENTAL RESEARCH
Volume 89, Issue 11, Pages 1293-1298Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/0022034510378427
Keywords
marrow stromal cells; BMSCs; mandible; long bone; osteogenic
Categories
Funding
- Oral and Maxillofacial Surgery Foundation [R01 DE019465]
- Stein-Oppenheimer endowment award
- T32 DE007296
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Although fundamentally similar to other bones, the jaws demonstrate discrete responses to developmental, mechanical, and homeostatic regulatory signals. Here, we hypothesized that rat mandible vs. long-bone marrow-derived cells possess different osteogenic potential. We established a protocol for rat mandible and long-bone marrow stromal cell (BMSC) isolation and culture. Mandible BMSC cultures formed more colonies, suggesting an increased CFU-F population. Both mandible and long-bone BMSCs differentiated into osteoblasts. However, mandible BMSCs demonstrated augmented alkaline phosphatase activity, mineralization, and osteoblast gene expression. Importantly, upon implantation into nude mice, mandible BMSCs formed 70% larger bone nodules containing three-fold more mineralized bone compared with long-bone BMSCs. Analysis of these data demonstrates an increased osteogenic potential and augmented capacity of mandible BMSCs to induce bone formation in vitro and in vivo. Our findings support differences in the mechanisms underlying mandible homeostasis and the pathophysiology of diseases unique to the jaws.
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