Lu X.,Zhejiang University |
Lu X.,Kidney Disease Immunology Laboratory |
Lu X.,Key Laboratory Of Multiple Organ Transplantation |
Lu X.,Key Laboratory of Nephropathy |
And 36 more authors.
Experimental and Clinical Transplantation | Year: 2014
Objectives: To evaluate the effect of isogeneic CD4+CD25+ regulatory T cells on cardiac allograft tolerance in heterotopic heart transplant from Balb/c to C57BL/6 mice. Materials and Methods: Isogeneic and allogeneic CD4+CD25+ regulatory T cells were obtained from pregnant C57BL/6 mice crossed with male Balb/c mice and from regular Balb/c mice. Recipient C57BL/6 mice were treated with sublethal radiation (2 Gy) and an infusion of isogeneic CD4+CD25+ regulatory T cells, allogeneic CD4+CD25+ regulatory T cells, or phosphate-buffered saline alone 1 day before a Balb/c-to-C57BL/6 heterotopic heart transplant. At 10 days after the transplant, cardiac allografts and the sera of recipients were evaluated with histology and cytokine analysis. Splenocytes of recipients were collected to determine chimerism on the day of the cessation of allograft heartbeat. Results: Mice that received an infusion of isogeneic CD4+CD25+ regulatory T cells had significantly greater mean median survival time, greater degree of chimerism, decreased levels of cytokines (monokine induced by interferon γ, interleukin 6, interleukin 10, and regulated upon activation, normal T cell expressed and secreted protein), and decreased lymphocytic infiltration than did mice that received phosphate-buffered saline alone. The effects on allograft tolerance were stronger in mice that received the isogeneic than the allogeneic CD4+CD25+ regulatory T cells. Conclusions: Isogeneic CD4+CD25+ regulatory T cells may establish cardiac allograft tolerance by inducing mixed chimerism and suppressing immune responses. Infusion with isogeneic CD4+CD25+ regulatory T cells combined with radiation (sublethal dose, 2 Gy) may establish allograft tolerance in mice. Therefore, further study is warranted because isogeneic CD4+CD25+ regulatory T cells may have therapeutic benefits. © Başkent University 2014 Printed in Turkey. All Rights Reserved.
Lv R.,Zhejiang University |
Lv R.,Key Laboratory of Nephropathy |
Lv R.,Kidney Disease Immunology Laboratory |
Lv R.,Key Laboratory of Multiple Organ Transplantation |
And 20 more authors.
Disease Markers | Year: 2015
Background. C3d is a product of both the classic and the alternative complement cascades; however, few studies have addressed the role of C3d in renal biopsies and its relationship with long-term graft survival rate is not very clear. Methods. 94 patients with biopsy-proven acute rejection episodes were included in the study. We investigated the associations between histological findings, clinical examinations, and outcome. Results. The overall prevalence for C4dPTC and C3dPTC was 42.6% and 29.8%. There was a significant association between C3dPTC and C4dPTC (P < 0.001). C3dPTC and C4dPTC were related with histological types (P = 0.024 and P < 0.001, resp.). The long-term survival rate for C4dPTC positive transplants was lower than that of C4dPTC negative transplants, but it was not statistic significant in our study (P = 0.150). The survival rate of C3dPTC positive group was much lower than the negative group (P = 0.014). Patients with double positives for C4dPTC and C3dPTC exhibited the lowest survival rate significantly different from those of the C3dPTC only and C4dPTC only groups (P = 0.01 and P = 0.0037). Conclusions. This longitudinal cohort study has demonstrated that C3d deposition in the PTC was closely related to renal dysfunction and pathological changes. © 2015 Rong Lv et al.