title: Control of mouse graft-versus-host disease following allogeneic bone marrow transplantation by blocking the CD28/B7 signaling pathway with lentiviral vector-mediated RNA interference.
abstract: Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is an effective way to cure hematological malignancies. However, graft-versus-host disease (GVHD) following transplantation limits the clinical application to some extent. The donor T lymphocytes play a central role in the occurrence and development of GVHD. Control of GVHD by inhibition of T cell proliferation by blocking the CD28/B7 signaling pathway with RNA interference has not been examined. In this study, we constructed a lentiviral vector carrying CD28 shRNA and generated genetically engineered splenocytes through transduction in a murine allogeneic bone marrow transplantation model. The survival and the occurrence of GVHD in transplanted mice were monitored every day. Liver, intestine, skin, and other tissues from the mice in each group were used for histological examination. We also determined plasma concentrations of interleukin (IL)-2, IL-4, IL-5, IL-10, IL-13, and interferon gamma (IFN-γ). Recipient bone marrow from mice that had survived for an extended period was examined to detect chimerism. We succeeded in suppressing the expression of CD28 gene and controlling mouse GVHD following allogeneic bone marrow transplantation in the engineered spleen cell group. These suggest that blocking the CD28/B7 signal transduction pathway with lentiviral vector-mediated RNA interference effectively controlled the occurrence of mouse GVHD following allogeneic bone marrow transplantation. Its mechanism could be due to the inhibition of T cell proliferation and, simultaneously, the promotion of the differentiation of TH0 to TH2 cells, thereby reducing GVHD in the mouse transplantation model.
authors.affiliation: The Key Laboratory of Transplantation Immunity, Affiliated Hospital of Xuzhou Medical College, Xuzhou City, Jiangsu Province, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Sang
authors.forename: Cui
authors.initials: C
authors.lastname: Zhou
authors.forename: Nana
authors.initials: N
authors.lastname: Cheng
authors.forename: Zhengyu
authors.initials: Z
authors.lastname: Li
authors.forename: Lingyu
authors.initials: L
authors.lastname: Zeng
authors.forename: Kailin
authors.initials: K
authors.lastname: Xu
mesh_terms: D000818:Animals; D018122:B7-1 Antigen / Q000378:metabolism*; D001483:Base Sequence; D016026:Bone Marrow Transplantation / Q000276:immunology*; D018106:CD28 Antigens / Q000235:genetics / Q000378:metabolism*; D002470:Cell Survival / Q000276:immunology; D046528:Chimerism; D016207:Cytokines / Q000097:blood; D005260:Female; D005822:Genetic Vectors / Q000235:genetics; D006086:Graft vs Host Disease / Q000276:immunology / Q000473:pathology; D057809:HEK293 Cells; D006801:Humans; D016086:Lentivirus / Q000235:genetics; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D034622:RNA Interference / Q000276:immunology*; D034741:RNA, Small Interfering / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction / Q000276:immunology*; D016019:Survival Analysis; D013601:T-Lymphocytes / Q000276:immunology / Q000378:metabolism; D014184:Transplantation, Homologous / Q000276:immunology*
chemical_list: D018122:B7-1 Antigen; D018106:CD28 Antigens; D016207:Cytokines; D034741:RNA, Small Interfering