Download MendeleyPublic T cell clonotypes are selected in HLA-B ∗ 57:01 + /HIV + patients independently of the viral load.
Chatzileontiadou, D.S.M., Lobos, C.A., Robson, H., Almedia, C.A., Szeto, C., Castley, A., D'Orsogna, L.J., Gras, S.(2024) Cell Rep 43: 114555-114555
- PubMed: 39083376
- DOI: https://doi.org/10.1016/j.celrep.2024.114555
- Primary Citation of Related Structures:
8F5A, 8F7M - PubMed Abstract:
HIV controllers can control viral replication and remain healthy, but the mechanism behind this control is unknown. Despite human leukocyte antigen (HLA) diversity in the population, almost 50% of HIV controllers express the HLA-B ∗ 57:01 molecule, which presents, among others, the Gag-derived epitope TW10. Given TW10's presentation in early infection, TW10-specific T cells could participate in the control of HIV. Here, we study the strength and functionality of TW10-specific T cells from HLA-B ∗ 57:01 + /HIV + controller and non-controller individuals. We determine the TW10-specific T cell receptor (TCR) repertoire, revealing a bias in TCR gene usage with the presence of a public TCR. We determine that the T cell response is polyfunctional regardless of the viral load, despite the low affinity of TW10-specific TCRs. We solve the crystal structure of HLA-B ∗ 57:01-TW10 in complex with a TCR, providing the basis of recognition that underpins the strong TRBV5 bias observed in TW10-specific clonotypes.
Organizational Affiliation:
Immunity and Infection Program, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Bundoora, VIC 3086, Australia; Department of Biochemistry and Chemistry, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC 3086, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia. Electronic address: d.chatzileontiadou@latrobe.edu.au.
