T-cell engagers mediate deep cell depletion beyond autoimmunity.

Area of Science:

• Immunology
• Transplantation Medicine
• Cellular Therapy

Background:

• B-cell and plasma cell depletion therapies are transforming treatment paradigms.
• T cell-redirecting therapies, including chimeric antigen receptor T cells and T-cell engagers, show significant efficacy in hematologic malignancies and autoimmune diseases.

Purpose of the Study:

• To highlight the expanding applications of deep cell depletion beyond traditional indications.
• To report a milestone in transplantation tolerance using B-cell maturation antigen-targeting T-cell engagers.

Main Methods:

• Application of B-cell maturation antigen-targeting T-cell engagers.
• Achieving human leukocyte antigen desensitization in a highly sensitized kidney transplant candidate.

Main Results:

• Successful human leukocyte antigen desensitization was achieved in a kidney transplant candidate.
• Demonstrated the efficacy of T cell-redirecting therapies in a nonmalignant, nonautoimmune context.

Conclusions:

• Deep cell depletion strategies are expanding into new therapeutic areas, including transplantation.
• This success paves the way for novel treatments in transplantation tolerance, allergic diseases, and other nonmalignant conditions.