cells and leukocyte populations within dissociated kidney cells. Antibodies
include anti-CD45-FITC (HI30), anti-CD19-PE (HIB19), anti-CD11c-PerCP/Cy5.5
(Bu15), anti-CD10-BV421 (HI10A), anti-CD14-BV510 (M5E2), anti-CD3-BV605 (UCHT1),
anti-CD4-BV650 (RPA-T4), anti-CD8-BV711 (SK1), anti-CD31-AlexaFluor700 (WM59),
anti-PD-1-APC (EH12.2H7), and propidium iodide (all from BioLegend). Kidney or
urine cells were incubated with antibodies in HBSS/1%BSA for 30min. Cells were
washed once in HBSS/1%BSA, centrifuged, and passed through a 70 μm
filter. Cells were sorted on a 3-laser BD FACSAria Fusion cell sorter. Intact
cells were gated according to FSC-A and SSC-A. Doublets were excluded by serial
FSC-H/FSC-W and SSC-H/SSC-W gates. Non-viable cells were excluded based on
propidium iodide uptake. Cells were sorted through a 100 micron nozzle at 20
psi. For each sample, 10% of the sample was allocated to sort
CD10+CD45− epithelial cells as single cells,
and the remaining 90% of the sample was used to sort CD45+ leukocytes
as single cells. Single cells were sorted into 384-well plates containing
6µl 1% NP-40 with index sorting, and plates were immediately frozen and
stored at −80 °C. Flow cytometric quantification of cell
populations was performed using FlowJo 10.0.7.