Decrease of immature B cell and interleukin-10 during early-post-transplant period in renal transplant recipients...

Area of Science:

• Immunology
• Transplantation Science
• Cell Biology

Background:

• B lymphocytes play a crucial role in kidney transplantation (KT) outcomes.
• Understanding B cell subset dynamics post-KT is essential for optimizing immunosuppressive strategies.

Purpose of the Study:

• To evaluate the changes in B cell subsets before and after kidney transplantation.
• To investigate the impact of immunosuppressive drugs on B cell populations post-KT.

Main Methods:

• Multi-color flow cytometry was used to analyze peripheral blood mononuclear cells (PBMCs) from 21 kidney transplant recipients.
• Samples were collected pre-transplantation and one month post-transplantation.
• In vitro incubation of PBMCs with tacrolimus and mycophenolate mofetil was performed.

Main Results:

• The proportion of immature B cells (CD24(+)CD38(+)/CD19(+)) significantly decreased post-KT (P<0.01).
• Levels of IL-10, IL-21, and BLNK expression also decreased significantly after transplantation.
• Immune suppressants tacrolimus and mycophenolate mofetil significantly reduced immature B cells in vitro.

Conclusions:

• Kidney transplantation leads to a significant reduction in immature B cells and associated cytokines, while mature and memory B cell subsets remain stable.
• Immunosuppressive drugs like tacrolimus and mycophenolate mofetil contribute to the decrease in immature B cells post-KT.
• These findings highlight a selective impact of immunosuppression on B cell subsets following kidney transplantation.