Role of CD8(+) Cells in the Progression of Murine Adriamycin Nephropathy

Kidney Int. 2001 Mar;59(3):941-9. doi: 10.1046/j.1523-1755.2001.059003941.x.

Abstract

Background: Many studies have shown that interstitial inflammation in human and experimental renal disease is characterized by T-cell infiltration, but published data on the involvement of inflammatory cell subsets in progressive tubulointerstitial lesions are often conflicting. A previous study suggested a role for cytotoxic T lymphocytes in the damaging effect of CD4(+) T-cell depletion in murine adriamycin (ADR) nephropathy, a model of focal segmental glomerulosclerosis (FSGS), and tubulointerstitial inflammation. The aim of this study was to investigate the role of CD8(+) cells in this model.

Methods: Male BALB/c mice were treated with five intraperitoneal injections of anti-CD8 monoclonal antibody (mAb), beginning from five days after ADR treatment, when overt proteinuria was established. Seven mice in each of groups A (ADR + mAb), B (ADR only), and C (saline treated, age matched) were sacrificed at week 6. Changes in renal function and histopathological features were assessed. Tubulointerstitial inflammation and glomerular inflammation were examined immunohistochemically.

Results: mAb treatment reduced CD8(+) cell levels to <2% of normal in spleen. Proteinuria in group A was no different from that in group B at week 6, but was markedly higher than in group C. Creatinine clearance was significantly ameliorated by anti-CD8 treatment (71.8 +/- 4.9 microL/min vs. 29.2 +/- 2.8 in group B and 81.9 +/- 3.7 in group C). Morphometric analysis showed less FSGS in group A compared with group B (6.5 +/- 1.9 vs. 13.0 +/- 2.8, P < 0.001), as well as less tubular atrophy (indicated by increased ratio of tubule cell height to tubular diameter, 0.25 +/- 0.24 in group A vs. 0.04 +/- 0.02 in group B, P < 0.05). CD8 depletion also reduced interstitial expansion (6.3 +/- 2.2% vs. 16.4 +/- 3.1 in group B, P < 0.001) and fibrosis (P < 0.01). Macrophage infiltration in tubulointerstitium was less in group A than in group B (P = 0.052). The number of interstitial CD4(+) cells appeared to increase after anti-CD8 treatment, but was not statistically different between groups A and B.

Conclusion: Anti-CD8 treatment protects against renal functional and structural injury in this murine model of chronic proteinuric renal disease.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antibodies, Monoclonal / pharmacology
  • Atrophy
  • CD8-Positive T-Lymphocytes / immunology
  • CD8-Positive T-Lymphocytes / physiology*
  • Creatinine / metabolism
  • Disease Progression
  • Doxorubicin*
  • Fibrosis
  • Glomerulosclerosis, Focal Segmental / chemically induced
  • Glomerulosclerosis, Focal Segmental / pathology
  • Immunohistochemistry
  • Kidney Diseases / chemically induced*
  • Kidney Diseases / pathology
  • Kidney Diseases / physiopathology*
  • Kidney Diseases / urine
  • Kidney Tubules / pathology
  • Mice
  • Mice, Inbred BALB C
  • Proteinuria / etiology

Substances

  • Antibodies, Monoclonal
  • Doxorubicin
  • Creatinine