Assessment of the immunopeptidomic profile
in PDOs. (A) Gene ontology
enrichment analysis. The most overrepresented biological processes
for RCC (left panel) and bladder (right panel) PDOs are shown (hypergeometric
test padj <0.01) (B) The source proteins expression is depicted
as log2 of the RNA level in healthy kidney tissue (black
square) and in blood PBMCs (red circle). The 1st quartile is indicated
as black and red dashed line, respectively, for the healthy kidney
tissue and blood PBMCs. (C) PBMCs from healthy donors or (D) PBMCs
from a patient were pulsed for 9 days with the indicated peptides,
and at day 10 CD8+T cells were isolated and used in an in
vitro killing assay at E/T 1:1. The time-response is shown
after adding the effectors. The data are shown as the mean ±
SEM, and the significance was assessed by 2-way ANOVA, ****p < 0.0001, ***p < 0.001, **p < 0.01, *p < 0.05. The results
are plotted as bar graph (n = 2).