A late B lymphocyte action in dysfunctional tissue repair following kidney injury and transplantation

Pietro E. Cippà (), Jing Liu, Bo Sun, Sanjeev Kumar, Maarten Naesens and Andrew P. McMahon ()
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Pietro E. Cippà: University of Southern California
Jing Liu: University of Southern California
Bo Sun: University of Southern California
Sanjeev Kumar: University of Southern California
Maarten Naesens: KU Leuven
Andrew P. McMahon: University of Southern California

Nature Communications, 2019, vol. 10, issue 1, 1-11

Abstract: Abstract The mechanisms initiating late immune responses to an allograft are poorly understood. Here we show, via transcriptome analysis of serial protocol biopsies from kidney transplants, that the initial responses to kidney injury correlate with a late B lymphocyte signature relating to renal dysfunction and fibrosis. With a potential link between dysfunctional repair and immunoreactivity, we investigate the immunological consequences of dysfunctional repair examining chronic disease in mouse kidneys 18 months after a bilateral ischemia/reperfusion injury event. In the absence of foreign antigens, a sustained immune response involving both innate and adaptive immune systems accompanies a transition to chronic kidney damage. At late stages, B lymphocytes exhibite an antigen-driven proliferation, selection and maturation into broadly-reacting antibody-secreting cells. These findings reveal a previously unappreciated role for dysfunctional tissue repair in local immunomodulation that may have particular relevance to transplant-associated immunobiology.

Date: 2019
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DOI: 10.1038/s41467-019-09092-2

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