Nephrol Dial Transplant (2000) 15: 1046-1053
© 2000 European Renal Association-European Dialysis and Transplant Association
Preliminary Report
Expression of chemokines and their receptors in nephrotoxic serum nephritis
1 Medizinische Poliklinik, Klinikum Innenstadt der Ludwigs-Maximilians-Universität, Munich, Germany and 2 Department of Pathology, University Hospital Nijmegen, Nijmegen, The Netherlands
Background. Chemokines play a major role in leukocyte infiltration in inflammatory kidney diseases. The specificity of the chemokine action is determined by the restricted expression of the corresponding receptors on leukocytes. We therefore simultaneously studied the expression of CC-chemokine and CC-chemokine receptor 1–5 (CCR 1–5) mRNA in an accelerated model of nephrotoxic nephritis in CD-1 mice.
Methods. Kidneys were harvested at day 0, 2 and 7. Induction of nephritis was confirmed by assessment of albuminuria by ELISA and by histological evaluation. RNA was prepared from cortex and isolated glomeruli. RNase protection assays were performed to study the expression of chemokines, RNase protection assays as well as quantitative RT-PCR assays to study the expression of chemokine receptors.
Results. In the cortex of nephritic kidneys mRNA for MCP-1 was increased 5-fold on day 2 and increased 4-fold on day 7 as compared to controls. mRNA for RANTES was increased 5-fold on day 7 and mRNA for IP-10 6-fold on day 7. The increase of mRNA for the chemokine receptors CCR1 and 5 was between 2-fold and 3-fold determined by RNase protection assay and for CCR1, 2 and 5 between 2- and 4-fold as determined by RT-PCR. In isolated glomeruli we found by RT-PCR an increase of CCR1, CCR2 and CCR5 of between 3 and 12-fold.
Conclusion. These results show that chemokines and their specific chemokine receptors are increased in parallel in this model of glomerulonephritis, consistent with the potential role of the chemokine system in leukocyte recruitment to the immune injured kidney.
Keywords: CC-chemokines; chemokine receptors; glomerulonephritis; mouse; nephrotoxic glomerulonephritis
Correspondence and offprint requests to: Detlef Schlöndorff, MD, Medizinische Poliklinik, Klinikum Innenstadt der Ludwigs-Maximilians-Universität, Pettenkoferstr. 8a, D-80336 Munich, Germany.
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