title: Influence of bone-derived matrices on generation of bone in an ectopic rat model.
abstract: Most bone regeneration experimental models that test bone-derived matrices take place in conjunction with the native bone. Here, we compared the relative effectiveness of bone matrix components on bone-marrow-directed osteogenesis in an ectopic model. Cortical bone cylinders consisted of diaphysis of DA rat femurs. They were either demineralized (DBM), deproteinized (HABM), or nontreated (MBM). Fresh bone marrow was placed into cylinders and implanted at subcutaneous thoracic sites of 2-month-old DA rats. At designated times the cylinders were surgically removed from the animals. Microradiographs of DBM and histology of DBM and MBM cylinders demonstrated progressive increase in mineralized bone volume and its trabecular configuration. Bone filled the inner volume of DBM and MBM cylinders within 4 weeks, while in HABM cylinders mostly granulation tissue developed. In the DBM cylinders cartilage deposited within 10 days, while in the MBM cylinders bone was directly deposited. As early as day 3 after marrow transplantation, marrow cells interacting with DBM increased significantly the genes that express the cartilage and the bone phenotype. In conclusion, organic components of bone are needed for marrow-directed osteogenesis.
authors.affiliation: Department of Oral Biology, The Maurice and Gabriela Goldschleger, School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
authors.forename: H
authors.initials: H
authors.lastname: Bahar
authors.forename: A
authors.initials: A
authors.lastname: Yaffe
authors.forename: A
authors.initials: A
authors.lastname: Boskey
authors.forename: I
authors.initials: I
authors.lastname: Binderman
mesh_terms: D000818:Animals; D015415:Biomarkers; D018775:Bone Demineralization Technique; D001853:Bone Marrow / Q000000981:diagnostic imaging / Q000502:physiology*; D001854:Bone Marrow Cells / Q000166:cytology / Q000502:physiology; D016026:Bone Marrow Transplantation; D002356:Cartilage / Q000502:physiology; D002450:Cell Communication / Q000502:physiology; D018483:Diaphyses / Q000000981:diagnostic imaging / Q000502:physiology*; D005260:Female; D005269:Femur / Q000166:cytology / Q000000981:diagnostic imaging / Q000502:physiology*; D005663:Furans; D015870:Gene Expression / Q000502:physiology; D006410:Hematopoiesis / Q000502:physiology; D023421:Models, Animal; D010006:Osteoblasts / Q000166:cytology / Q000502:physiology; D010012:Osteogenesis / Q000502:physiology*; D011859:Radiography; D051381:Rats; D012038:Regeneration / Q000502:physiology*; D013876:Thiophenes
chemical_list: C516387:3,4-bis-(2,4,5-trimethyl-thiophen-3-yl)furan-2,5-dione; D015415:Biomarkers; D005663:Furans; D013876:Thiophenes