Portal de Periódicos da CAPES

Artigo Produção Nacional Revisado por pares

BIBTEX RIS

In Vitro Proliferation and Osteoblastic Phenotype Expression of Cells Derived From Human Vertebral Lamina and Iliac Crest

2009; Lippincott Williams & Wilkins; Volume: 34; Issue: 15 Linguagem: Inglês

10.1097/brs.0b013e3181a9c087

1528-1159

Helton Luíz Aparecido Defino, Carlos Fernando Pereira da Silva Herrero, Grasiele Edilaine Crippa, L.S. Bellesini, Márcio Mateus Beloti, Adalberto Luiz Rosa,

TGF-β signaling in diseases

In Brief Study Design. Osteoblastic cells derived from vertebral lamina and iliac crest were isolated and cultured under the same conditions (osteogenic medium, pH, temperature, and CO2 levels). Objective. To compare proliferation and expression of osteoblastic phenotype of cells derived from vertebral lamina and iliac grafting. Summary of Background Data. Many factors play a role in the success of bone graft in spinal fusion including osteoblastic cell population. Two common sources of graft are vertebral lamina and iliac crest, however, differences in proliferation and osteoblastic phenotype expression between cells from these sites have not been investigated. Methods. Cells obtained from cancellous bone of both vertebral lamina and iliac crest were cultured and proliferation was evaluated by direct cell counting and viability detected by Trypan blue. Alkaline phosphatase (ALP) activity was evaluated by thymolphthalein release from thymolphthalein monophosphate and matrix mineralization by staining with alizarin red S. Gene expression of ALP, osteocalcin, runt-related transcription factor 2, Msh homeobox 2, bone morphogenetic protein 7, intercellular adhesion molecule 1 precursor, osteoprotegerin, and receptor activator of NF-kB ligand was analyzed by real-time PCR. All comparisons were donor-matched. Results. Proliferation was greater at days 7 and 10 in cells from vertebral lamina compared with ones from iliac crest without difference in cell viability. ALP activity was higher in cells from vertebral lamina compared with cells from iliac crest at days 7 and 10. At 21 days, mineralized matrix was higher in cells derived from vertebral lamina than from iliac crest. At day 7, gene expression of ALP, osteocalcin, runt-related transcription factor 2, Msh homeobox 2, bone morphogenetic protein 7, intercellular adhesion molecule 1 precursor, receptor activator of NF-kB ligand, and osteoprotegerin was higher in cells derived from vertebral lamina compared with iliac crest. Conclusion. Cell proliferation and osteoblastic phenotype development in cells derived from cancellous bone were more exuberant in cultures of vertebral lamina than of iliac crest. Vertebral lamina and iliac crest are common sources of bone graft. This study aimed at comparing in vitro proliferation and osteoblastic phenotype expression of cells derived from these sites. The results indicated that cells from vertebral lamina exhibited greater cell proliferation and osteoblastic phenotype expression than cells from iliac crest.