title: Development of a cyclosporin-A-induced immune tolerant rat model to test marrow allograft cell type effects on bone repair.
abstract: Bone repair is an important concept in tissue engineering, and the ability to repair bone in hypotrophic conditions such as that of irradiated bone, represents a challenge for this field. Previous studies have shown that a combination of bone marrow and (BCP) was effective to repair irradiated bone. However, the origin and role played by each cell type in bone healing still remains unclear. In order to track the grafted cells, the development of an animal model that is immunotolerant to an allograft of bone marrow would be useful. Furthermore, because the immune system interacts with bone turnover, it is of critical importance to demonstrate that immunosuppressive drugs do not interfere with bone repair. After a preliminary study of immunotolerance, cyclosporin-A was chosen to be used in immunosuppressive therapy. Ten rats were included to observe qualitative and quantitative bone repair 8 days and 6 weeks after the creation of bone defects. The defects were filled with an allograft of bone marrow alone or in association with BCP under immunosuppressive treatment (cyclosporin-A). The results showed that there was no significant interaction of cyclosporin-A with osseous regeneration. The use of this new immunotolerant rat model of bone marrow allograft in future studies will provide insight on how the cells within the bone marrow graft contribute to bone healing, especially in irradiated conditions.
authors.affiliation: INSERM, UMRS 791, Laboratoire d'ingénierie ostéo-articulaire et dentaire, LIOAD, 1 place Alexis Ricordeau, 44042, Nantes Cedex 1, France, florent.espitalier@chu-nantes.fr.
authors.forename: Florent
authors.initials: F
authors.lastname: Espitalier
authors.forename: Nicolas
authors.initials: N
authors.lastname: Durand
authors.forename: Séverine
authors.initials: S
authors.lastname: Rémy
authors.forename: Pierre
authors.initials: P
authors.lastname: Corre
authors.forename: Sophie
authors.initials: S
authors.lastname: Sourice
authors.forename: Paul
authors.initials: P
authors.lastname: Pilet
authors.forename: Pierre
authors.initials: P
authors.lastname: Weiss
authors.forename: Jérôme
authors.initials: J
authors.lastname: Guicheux
authors.forename: Olivier
authors.initials: O
authors.lastname: Malard
mesh_terms: D064591:Allografts; D000818:Animals; D016026:Bone Marrow Transplantation / Q000379:methods*; D001842:Bone and Bones / Q000293:injuries / Q000601:surgery; D016572:Cyclosporine / Q000494:pharmacology*; D004195:Disease Models, Animal; D007091:Image Processing, Computer-Assisted; D007165:Immunosuppression Therapy / Q000379:methods*; D007166:Immunosuppressive Agents / Q000494:pharmacology*; D008855:Microscopy, Electron, Scanning; D051381:Rats; D017207:Rats, Sprague-Dawley; D017208:Rats, Wistar; D023822:Tissue Engineering / Q000379:methods*; D014184:Transplantation, Homologous / Q000379:methods
chemical_list: D007166:Immunosuppressive Agents; D016572:Cyclosporine