Measuring alloreactive B cell responses in transplant recipients

Area of Science:

• Transplantation immunology
• Humoral immunity

Background:

• Donor-specific antibodies (DSA) are a primary cause of transplant tissue injury despite immunosuppression.
• Effective prevention, diagnosis, and treatment of antibody-mediated rejection require thorough assessment of anti-donor humoral immunity.

Purpose of the Study:

• To review the historical and current techniques for evaluating anti-donor humoral immune responses in transplantation.
• To highlight the evolution from measuring circulating DSA to analyzing B cell subsets.

Main Methods:

• Review of experimental and clinical transplantation literature.
• Summary of evolving techniques for assessing humoral immunity, including B cell subset analysis.

Main Results:

• Historically, only DSA serum levels were measured.
• Current focus has shifted to analyzing B cell subsets, particularly donor antigen-specific B cells.
• Advanced methods, initially developed for other fields, are now being applied to transplantation.

Conclusions:

• Assessing antibody-mediated rejection requires a multifaceted approach.
• Complementary strategies evaluating both DSA and B cell subsets are essential for successful management of transplant rejection.