Donor TRM persistence is associated with reduced clinical complications. Donor TRM persistence is associated with reduced clinical complications. Patient.

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Presentation transcript:

Donor TRM persistence is associated with reduced clinical complications. Donor TRM persistence is associated with reduced clinical complications. Patient records were examined for clinical complications including PGD and episodes of ACR at all time points of BAL acquisition (see Materials and Methods). (A) Graphs show percentage (mean ± SEM) of donor CD4+ (left) or CD8+ (right) T cells in the BAL over indicated times after transplantation in patients (n = 20) stratified on the basis of those who experienced PGD (red) or did not (blue). **P = 0.003 (left) and **P = 0.002 (right). Cumulative data across all time points showed increased proportion of donor CD8+ (P = 0.008) and trends in increased donor CD4+ (P = 0.06) T cells in those participants without PGD. (B) Donor CD4+ (left) and CD8+ (right) T cell frequencies over indicated times after transplantation in patients (n = 20 total patients; n = 7 patients with 10 discrete episodes of ACR at any time) based on the presence (solid squares) or absence (open circles) of ACR. ***P < 0.01. (C to E) Serial sections of a TBBx from one patient (P29) who experienced ACR at 1 month after lung transplant (grade 1); donor is HLA-A2+, and recipient is HLA-A2−. Immunofluorescence imaging stained for E-cadherin (purple), CD4 (green), HLA-A2 (red), and DAPI (blue). Yellow arrows indicate donor cells, and green arrows indicate recipient cells. “*” identifies a blood vessel (E) H&E stain, and “*” identifies blood vessel (*BV). (F) Frequency of donor origin CD4 (left) and CD8 (right) T cells in the BAL stratified on the basis of the presence or absence of a positive bacterial culture. *P < 0.05. Mark E. Snyder et al. Sci. Immunol. 2019;4:eaav5581 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works