Download MendeleyTopography of the HLA-A protein enforces shared and convergent immunodominant B cell and antibody alloresponses in transplant recipients.
Killian Jr., J.T., King, R.G., Lucander, A.C.K., Kizziah, J.L., Fucile, C.F., Diaz-Avalos, R., Qiu, S., Silva-Sanchez, A., Mousseau, B.J., Macon, K.J., Callahan, A.R., Yang, G., Hossain, M.E., Akther, J., Good, D.B., Kelso, S., Houp, J.A., Rosenblum, F., Porrett, P.M., Ong, S.C., Kumar, V., Saphire, E.O., Kearney, J.F., Randall, T.D., Rosenberg, A.F., Green, T.J., Lund, F.E.(2025) Immunity 58: 3040-3060.e12
- PubMed: 41289995
- DOI: https://doi.org/10.1016/j.immuni.2025.10.014
- Primary Citation of Related Structures:
8T6M, 8T7R - PubMed Abstract:
Donor-specific antibody responses against human leukocyte antigen (HLA) proteins mismatched between transplant donors and recipients cause allograft loss, yet the structural HLA epitopes targeted by alloreactive B cells and antibodies remain largely unresolved. We profiled the HLA-A ∗ 01:01-specific B cell response in the transplanted kidney and blood of a recipient undergoing antibody-mediated rejection and identified immunodominant B cell and antibody responses that emerged early in the alloimmune response. These responses were focused on topographically exposed mismatched HLA residues located in the α helices along the peptide-binding groove of HLA-A ∗ 01:01. We demonstrated that the anti-HLA-A ∗ 01:01 B cell alloresponse converged and was maintained on this same immunodominant HLA subregion, which comprises only 20% of the HLA molecule, in a diverse group of HLA-A ∗ 01:01-mismatched transplant recipients. Thus, the B cell and antibody alloresponses appear tightly focused on a topographically defined region on the HLA-A ∗ 01:01 crown that is conserved across individuals expressing distinct constellations of self-HLA-A.
- Department of Surgery, The University of Alabama at Birmingham Heersink School of Medicine, Birmingham, AL 35294, USA.
Organizational Affiliation:
