title: Development of hybrid type artificial bone marrow using sintered hydroxyapatite.
abstract: In vivo inducement of hybrid-type artificial bone marrow with hemopoietic inductive microenvironment (HIM) in sintered hydroxyapatite (HA) chamber was carried out. This research is important to disclose the mechanisms of hemopoiesis and is useful for clinical application. In the evolution of vertebrates, cartilage of the inner skeleton changed into bone, having biomechanical properties to form bone marrow cavities. The hemopoietic nests immigrated into the cavities from the spleen. We should be able to induce hemopoietic nests in a hydroxyapatite chamber in place of bone, if we can find optimal structural conditions. Therefore, we tried to artificially induce a hematopoietic field in muscles using sintered porous tubular hydroxyapatite and new type hydroxyapatite plate made by high-pressure gas technique. As a result, not only in the pore sites of tubular hydroxyapatite artificial bone, but at the surface of the new type hydroxyapatite plate implanted in the dorsal muscles, marked differentiation of bone marrow cell clusters of the hematopoietic field could be observed.
authors.affiliation: Department of Oral Surgery, Faculty of Medicine, University of Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Nishihara
authors.forename: T
authors.initials: T
authors.lastname: Tange
authors.forename: K
authors.initials: K
authors.lastname: Hirota
authors.forename: K
authors.initials: K
authors.lastname: Kawase
mesh_terms: D000818:Animals; D001187:Artificial Organs / Q000592:standards*; D001853:Bone Marrow; D004285:Dogs; D017886:Durapatite / Q000592:standards*; D006410:Hematopoiesis; D006358:Hot Temperature; D008422:Materials Testing; D016062:Porosity
chemical_list: D017886:Durapatite