RESUMO
Objective For providing experimental platform of chronic graft-versus-host disease (cGVHD),to establish a mouse model by haplo-identical spleen cell infusion.Methods The donor male mice (Balb/cH-2d) and the recipient (Balb/c C57BL/6) F1 H2-d/b (CB6F1) female mice were randomly divided into four groups:3 experimental groups injected with 3 107,6 107 and 9 107 spleen cells,respectively,while the control group received RPMI 1640 solution.H-2d and H-2b were checked to analyze the chimerism in bone marrow cells.Body mass,figure,cutaneous manifestation and survival of recipient mice were observed and scored every 3 days.Pathologic changes of target organs were observed and scored.Results Injection of 6 107 and 6 107 splenocytes in the recipient mice resulted in a chronic disease with a low level of parental cell engraftment steadily.As compared with 3 107 group,the incidence of cGVHD in 6 107 and 9 107 groups were significantly increased (P ＜0.01).But there was no significant difference between 6 107 and 9 107 groups (P＞0.05).Conclusion A murine model of cGVHD after haplo-identical spleen cell infusion of donor is successfully established by injection of 6 107 and 9 107 spleen cells.