Reconstitution of the uterine immune milieu after transplantation
Strunz, B.; Ivarsson, M.; Sun, D.; Ziegenhain, C.; Crona Guterstam, Y.; Solders, M.; Bjorklund, A.; Marquardt, N.; Kaipe, H.; Floter-Radestad, A.; Brusell-Gidlof, S.; Brannstrom, M.; Bjorkstrom, N. K.
Show abstract
Maintenance of tissue-specific immunity is important for immunological fitness, but its establishment have been difficult to assess in humans. Here, we investigated reconstitution of the human uterine immune system by studying women undergoing uterus solid organ transplantation (UTX) or hematopoietic stem cell transplantation (HSCT). Through single-cell identification based on SNPs and disparate HLA expression using single-cell RNA sequencing or high-parameter flow cytometry, donor vs recipient cell origin was determined, and features of these cells were studied. A full uterine immune cell reconstitution occurred after both UTX and HSCT, both at transcriptomic and phenotypic level. This occurred despite tacrolimus-induced calcineurin-mediated NFAT pathway inhibition, which affected de novo induction of tissue-residency features in vitro. Intriguingly, after HSCT, immune cells of male origin could reconstitute the uterine immune milieu. Collectively, our results proved insights into tissue immune system persistence and reconstitution capabilities in an organ undergoing continuous regeneration.
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