Delayed administration of adenoviral BMP-2 vector improves the formation of bone in osseous defects

The direct, local, administration of adenovirus carrying human BMP-2 cDNA (Ad.BMP-2) heals critical-sized femoral bone defects in rabbit and rat models. However, the outcome is suboptimal and the technology needs to provide a more reliable and uniform outcome. To this end, we investigated whether th...

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Veröffentlicht in:Gene therapy 2007-07, Vol.14 (13), p.1039-1044
Hauptverfasser: Betz, O B, Betz, V M, Nazarian, A, Egermann, M, Gerstenfeld, L C, Einhorn, T A, Vrahas, M S, Bouxsein, M L, Evans, C H
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container_end_page 1044
container_issue 13
container_start_page 1039
container_title Gene therapy
container_volume 14
creator Betz, O B
Betz, V M
Nazarian, A
Egermann, M
Gerstenfeld, L C
Einhorn, T A
Vrahas, M S
Bouxsein, M L
Evans, C H
description The direct, local, administration of adenovirus carrying human BMP-2 cDNA (Ad.BMP-2) heals critical-sized femoral bone defects in rabbit and rat models. However, the outcome is suboptimal and the technology needs to provide a more reliable and uniform outcome. To this end, we investigated whether the timing of Ad.BMP-2 administration influenced the formation of mineralized tissue within the defect. Critical-sized defects were created in the femora of 28 Sprague–Dawley rats. Animals were injected intralesionally with a single, percutaneous injection of Ad.BMP-2 (4 × 10 8  plaque-forming units) either intraoperatively (day 0) or 24 h (day 1), 5 days or 10 days after surgery. The femora were evaluated 8 weeks after surgery by X-ray, microcomputed tomography, dual-energy X-ray absorptiometry and biomechanical testing. The incidence of radiological union was markedly increased when administration of Ad.BMP-2 was delayed until days 5 and 10, at which point 86% of the defects healed. These time points also provided greater bone mineral content within the defect site and improved the average mechanical strength of the healed bone. Thus, delaying the injection of Ad.BMP-2 until 5 or 10 days after surgery enables a greater percentage of critical-sized, segmental defects to achieve radiological union, producing a repair tissue with enhanced mineralization and greater mechanical strength.
doi_str_mv 10.1038/sj.gt.3302956
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Cell therapy and gene therapy ; Animal models ; Animals ; Applied cell therapy and gene therapy ; Biological and medical sciences ; Biomedical and Life Sciences ; Biomedicine ; Biotechnology ; Bone and Bones - metabolism ; Bone and Bones - pathology ; Bone diseases ; Bone growth ; Bone mineral content ; Bone Morphogenetic Protein 2 ; Bone morphogenetic proteins ; Bone Morphogenetic Proteins - genetics ; Bone Morphogenetic Proteins - metabolism ; Bone Regeneration ; Bone surgery ; Bones ; Care and treatment ; Cell Biology ; Computed tomography ; Dual energy X-ray absorptiometry ; Fracture Fixation - methods ; Fracture Healing ; Fractures, Bone - metabolism ; Fractures, Bone - pathology ; Fractures, Bone - therapy ; Fundamental and applied biological sciences. Psychology ; Gene Expression ; Gene Therapy ; Genetic aspects ; Genetic Therapy - methods ; Genetic vectors ; Genetic Vectors - administration &amp; dosage ; Health. 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Intensive care medicine. Transfusions. Cell therapy and gene therapy</topic><topic>Animal models</topic><topic>Animals</topic><topic>Applied cell therapy and gene therapy</topic><topic>Biological and medical sciences</topic><topic>Biomedical and Life Sciences</topic><topic>Biomedicine</topic><topic>Biotechnology</topic><topic>Bone and Bones - metabolism</topic><topic>Bone and Bones - pathology</topic><topic>Bone diseases</topic><topic>Bone growth</topic><topic>Bone mineral content</topic><topic>Bone Morphogenetic Protein 2</topic><topic>Bone morphogenetic proteins</topic><topic>Bone Morphogenetic Proteins - genetics</topic><topic>Bone Morphogenetic Proteins - metabolism</topic><topic>Bone Regeneration</topic><topic>Bone surgery</topic><topic>Bones</topic><topic>Care and treatment</topic><topic>Cell Biology</topic><topic>Computed tomography</topic><topic>Dual energy X-ray absorptiometry</topic><topic>Fracture Fixation - methods</topic><topic>Fracture Healing</topic><topic>Fractures, Bone - metabolism</topic><topic>Fractures, Bone - pathology</topic><topic>Fractures, Bone - therapy</topic><topic>Fundamental and applied biological sciences. 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source MEDLINE; EZB-FREE-00999 freely available EZB journals; SpringerLink Journals - AutoHoldings
subjects Adenoviridae - genetics
Adenovirus
Adenoviruses
Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy
Animal models
Animals
Applied cell therapy and gene therapy
Biological and medical sciences
Biomedical and Life Sciences
Biomedicine
Biotechnology
Bone and Bones - metabolism
Bone and Bones - pathology
Bone diseases
Bone growth
Bone mineral content
Bone Morphogenetic Protein 2
Bone morphogenetic proteins
Bone Morphogenetic Proteins - genetics
Bone Morphogenetic Proteins - metabolism
Bone Regeneration
Bone surgery
Bones
Care and treatment
Cell Biology
Computed tomography
Dual energy X-ray absorptiometry
Fracture Fixation - methods
Fracture Healing
Fractures, Bone - metabolism
Fractures, Bone - pathology
Fractures, Bone - therapy
Fundamental and applied biological sciences. Psychology
Gene Expression
Gene Therapy
Genetic aspects
Genetic Therapy - methods
Genetic vectors
Genetic Vectors - administration & dosage
Health. Pharmaceutical industry
Human Genetics
Industrial applications and implications. Economical aspects
Injection
Male
Mechanical properties
Medical sciences
Mineralization
Models, Animal
Nanotechnology
original-article
Physiological aspects
Proteins
Rabbits
Rats
Rats, Sprague-Dawley
Rodents
Surgery
Transduction, Genetic - methods
Transforming Growth Factor beta - genetics
Transforming Growth Factor beta - metabolism
Transfusions. Complications. Transfusion reactions. Cell and gene therapy
title Delayed administration of adenoviral BMP-2 vector improves the formation of bone in osseous defects
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