Natural Killer Cells Promote Kidney Graft Rejection Independently of Cyclosporine A Therapy

Frontiers in Immunology
Muhammad Imtiaz AshrafKatja Kotsch

Abstract

Natural Killer (NK) cells have recently been recognized as key players in antibody-mediated chronic allograft failure, thus requiring a comprehensive understanding whether NK cells can escape conventional immunosuppressive regimens. Influence of cyclosporine A (CyA) on NK cell function was studied in a mouse model of allogeneic kidney transplantation (KTX, BALB/c to C57BL/6). Recipients were treated daily with CyA (10 mg/kg) for seven or 14 days for long term survival (day 56). Administration of CyA in recipients resulted in significantly reduced frequencies of intragraft and splenic CD8+ T cells, whereas the latter illustrated reduced IFNγ production. In contrast, intragraft and splenic NK cell frequencies remained unaffected in CyA recipients and IFNγ production and degranulation of NK cells were not reduced as compared with controls. Depletion of NK cells in combination with CyA resulted in an improvement in kidney function until day 7 and prolonged graft survival until day 56 as compared to untreated controls. Surviving animals demonstrated higher intragraft frequencies of proliferating CD4+FoxP3+Ki67+ regulatory T (TREG) cells as well as higher frequencies of CD8+CD122+ TREG. We here demonstrate that NK cell depletion comb...Continue Reading

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Citations

Sep 7, 2020·Journal of Cellular Physiology·Milad MoloudizargariMohammad Abdollahi
Mar 2, 2021·Frontiers in Immunology·Christian BinderDavid Berglund
Nov 7, 2020·American Journal of Reproductive Immunology : AJRI·Chloe A BradyIan P Crocker

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Methods Mentioned

BETA
density gradient centrifugation
flow
Assay
biopsies
PMA
intragraft

Software Mentioned

FlowJo
GraphPad
GraphPad Prism

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