Impact of Immunoglobulin M-Type Donor-Specific Human Leukocyte Antigen–Antibody Levels in Supernatants from Cultured Peripheral Blood Mononuclear Cells as Predictors of Antibody-Mediated Rejection

Pathogens

Yoshiko Matsuda¹  Shiro Takahara²  Koichi Tsutahara³  Norio Nonomura⁴  Ryoichi Imamura⁴ 

[1] Department of Advanced Technology for Transplantation, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan;Department of Renal Transplantation, Kansai Medical Hospital, Osaka 560-0083, Japan;Department of Urology, Osaka General Medical Center, Osaka 558-8558, Japan;Department of Urology, Osaka University Graduate School of Medicine, Osaka 565-0871, Japan;

关键词: antibody-mediated rejection;    kidney transplantation;    donor-specific anti-HLA antibody;    IgM antibody;    IgM memory B cell;    in vitro culture assay;   

DOI  :  10.3390/pathogens9090733

来源: DOAJ

【 摘 要 】

Background: Antibody-mediated rejection (AMR) is a crucial barrier in the long-term prognosis of transplant recipients. Methods: Peripheral blood mononuclear cells (PBMCs) were collected from kidney allograft recipients (N = 41) and cultured in vitro for 1 week. Furthermore, the supernatants of the cultured PBMCs were analyzed by Luminex single-antigen beads. Results: Analyses using Luminex single-antigen beads revealed the presence of immunoglobulin (Ig) G donor-specific anti-HLA antibodies (DSAs) was detected in the supernatants of cultured PBMCs collected more frequently than IgM in de novo DSA-sensitized patients with AMR, and IgM were detectable in patients with stable graft function mainly and several IgM DSAs were detectable in the supernatants of the cultured PBMCs before detecting the IgG levels in sera. We also found that the DSA-specific IgM-secreting memory B cells (mBCs) were more sensitive to the chronic use of immunosuppressive agents than to the IgG-secreting mBCs. Conclusions: In the transplant recipients, the assessment of supernatants of cultured PBMCs provide more details of immune reactions than the commonly used method that directly measures IgG DSA levels in patient sera and some IgM DSA detection may be a better predictor of IgG DSAs production, which may cause AMR and enable early intervention, in initial stages of AMR development.

【 授权许可】

Unknown