Belatacept and CD28 Costimulation Blockade: Preventing and Reducing Alloantibodies over the Long Term

Current Transplantation Reports
Ronald F ParsonsIdelberto Raul Badell

Abstract

Highlight developments in T and B cell biology that are helping elucidate the mechanisms underlying CD28 pathway blockade-mediated inhibition of alloantibodies in transplantation, and discuss recent clinical observations on the impact of belatacept on de novo and established HLA antibodies. The identification of T follicular helper cells as the CD4+ T cell subset required for optimal humoral immunity, along with newly identified roles for CD28 and the B7 molecules on B cell lineage cells has begun to pave the way for improved understanding and discovery of the mechanisms of CD28 costimulation blockade-mediated antibody inhibition. There has been resurgent clinical interest in the ability of belatacept to attenuate alloantibody responses. New reports have continued to document its ability to prevent de novo antibody responses, and more recent studies have surfaced exploring its potential to control nascent or pre-existing HLA antibodies. A growing understanding of the mechanisms of anti-CD28-mediated alloantibody inhibition and continued clinical successes will guide the clinical optimization of belatacept and next generation CD28 blockers to prevent and reduce alloantibodies over the long-term.

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Citations

May 15, 2020·American Journal of Transplantation : Official Journal of the American Society of Transplantation and the American Society of Transplant Surgeons·Glenn Michael La MuragliaIdelberto Raul Badell
Dec 18, 2020·Frontiers in Immunology·Farideh OrdikhaniJordi Ochando
Jun 15, 2021·Frontiers in Immunology·Katherine A YoungLaurie D Snyder

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