Sorted peripheral blood mononuclear cells were resuspended in PBS with 10% FBS and then centrifuged at 1000 r.p.m. for 5 min and resuspend in 200 μL staining buffer (BD Biosciences, San Jose, USA). Cells from each person were incubated with 10 μL one BD SMK sample tag (633781, BD Biosciences, San Jose, USA) for 20 min at RT and washed with cold-PBS twice. After the sample tag labeling, PBMCs from four people (at least one from healthy donors) were mixed for one scRNA-seq experiment. The average cell number of scRNA-seq experiments was around 15,000 cells. The read depth of each experiment was sequenced to 100 K reads per cell. Single-cell mRNA capture and library construction were performed according to BD Rhapsody's official instructions. Next-generation sequencing was performed using the Illumina Nova-Seq platform according to the official instructions.
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