ENHANCEMENT OF LUMBAR FUSION W/ RHBMP 2/ COLLAGEN OR LMP

使用 RHBMP 2/胶原蛋白或 LMP 增强腰椎融合

• 批准号: 8357373
• 负责人: SCOTT D. BODEN
• 金额: $ 3.29万
• 依托单位: EMORY UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-08-01 至 2012-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8357373
• 关键词: Animals; Bone Transplantation; Ceramics; Collagen; Complication; Cytoplasmic Granules; Dose; Failure; Funding; Genetic Engineering; Grant; Growth Factor; Healed; Human; Macaca mulatta; Modeling; National Center for Research Resources; Operative Surgical Procedures; Oryctolagus cuniculus; Osteogenesis; Preparation; Primates; Principal Investigator; Recombinants; Reporting; Research; Research Infrastructure; Resistance; Resources; Site; Source; Speed; Spinal Fusion; Testing; Titania; Titanium; United States National Institutes of Health; Vertebral column; bone; bone morphogenetic protein 2; cost; healing; minimally invasive; nonhuman primate

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. Lumbar spinal fusion is commonly performed on humans, but the failure of bone union is a frequent complication. Osteoinductive growth factors synthesized by recombinant DNA technology have been shown to induce bone formation in heterotopic sites. Recombinant human BMP-2 (rhBMP-2) has been effective in generating spine fusions in a rabbit model. To determine the dose of the growth factor in humans, and to determine the speed of healing, a nonhuman primate model is used. In 2010, we did surgery on 4 rhesus monkeys to investigate a new ceramic bone graft substitute. Higher doses than expected were required to make bone in the primate. The growth factor was delivered inside a hollow titanium treated fusion cage through a minimally invasive approach. Studies have focused on fine tuning the dose and studying alternative carrier materials, including different combinations of ceramic materials for use in the posterolateral spine. We investigated new carriers for BMP-2 and continued studies with LMP-1, and we found that a compression resistant collagen matrix was an effective carrier. During the reporting period, we tested wrapping the existing BMP-w preparation around a ceramic granule matrix as a bulking agent. This was successful in 2/3s animals to achieve spine fusion. This will move on to human trials.

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