Search

Your search keyword '"McINTOSH, KEVIN"' showing total 12 results
Start Over Author "McINTOSH, KEVIN" Publisher wiley
12 results on '"McINTOSH, KEVIN"'

12. Acceleration of spinal fusion using syngeneic and allogeneic adult adipose derived stem cells in a rat model.

Author

Lopez MJ, McIntosh KR, Spencer ND, Borneman JN, Horswell R, Anderson P, Yu G, Gaschen L, and Gimble JM

Subjects
Adipose Tissue cytology, Adult Stem Cells ultrastructure, Animals, Bony Callus diagnostic imaging, Lumbar Vertebrae diagnostic imaging, Lumbar Vertebrae surgery, Male, Microscopy, Electron, Scanning, Osteogenesis, Rats, Rats, Inbred F344, Tissue Scaffolds, Transplantation, Homologous, Transplantation, Isogeneic, X-Ray Microtomography, Adult Stem Cells transplantation, Bony Callus physiology, Lumbar Vertebrae physiology, Spinal Fusion
Abstract

Posterolateral spinal fusion is the standard treatment for lumbar compression fractures. Adult adipose tissue-derived stem cells (ASCs) promote osteogenesis in vivo and in vitro. The hypothesis tested in this study was that syngeneic and allogeneic ASCs on a biomaterial scaffold composed of tricalcium phosphate and collagen I will accelerate spinal fusion in a rat model. ASCs from male Fischer or ACI rats were loaded onto scaffolds (53,571 cells/mm(3)) and cultured in stromal media for 48 h. Male Fisher rats were assigned to 4 cohorts (n = 14/cohort) after bilateral decortication of the L4 and L5 transverse processes: (1) No treatment; (2) scaffold only; (3) scaffold + syngeneic ASCs; or (4) scaffold + allogeneic ASCs. Half of each cohort was harvested 4 or 8 weeks after surgery. Spinal fusion was evaluated with radiographs, microcomputed tomography, and light microscopy. Callus did not form in spines without scaffolds. There were no significant differences in callus formation among scaffold cohorts 4 weeks after surgery. Callus formation was more mature in both ASC cohorts versus scaffold alone 8 weeks after surgery based on microstructure as well as radiographic and microcomputed tomographic evidence of active bone formation. Inflammatory cell infiltrate was significantly lower in both ASC cohorts (syngeneic = 18.3 +/- 0.85%; allogeneic = 23.5 +/- 2.33%) versus scaffold alone (46.8 +/- 11.8%) 4 weeks after surgery. Results of this study support syngeneic and allogeneic ASC acceleration of posterior lumbar spinal fusion in a rat model., ((c) 2008 Orthopaedic Research Society.)

Published
2009
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results