CD8 + T cells modulate autosomal dominant polycystic kidney disease progression

Kidney Int. 2018 Dec;94(6):1127-1140. doi: 10.1016/j.kint.2018.06.025. Epub 2018 Sep 21.

Abstract

Autosomal dominant polycystic kidney disease (ADPKD) is the most prevalent inherited nephropathy. To date, therapies alleviating the disease have largely focused on targeting abnormalities in renal epithelial cell signaling. ADPKD has many hallmarks of cancer, where targeting T cells has brought novel therapeutic interventions. However, little is known about the role and therapeutic potential of T cells in ADPKD. Here, we used an orthologous ADPKD model, Pkd1 p.R3277C (RC), to begin to define the role of T cells in disease progression. Using flow cytometry, we found progressive increases in renal CD8+ and CD4+ T cells, correlative with disease severity, but with selective activation of CD8+ T cells. By immunofluorescence, T cells specifically localized to cystic lesions and increased levels of T-cell recruiting chemokines (CXCL9/CXCL10) were detected by qPCR/in situ hybridization in the kidneys of mice, patients, and ADPKD epithelial cell lines. Importantly, immunodepletion of CD8+ T cells from one to three months in C57Bl/6 Pkd1RC/RC mice resulted in worsening of ADPKD pathology, decreased apoptosis, and increased proliferation compared to IgG-control, consistent with a reno-protective role of CD8+ T cells. Thus, our studies suggest a functional role for T cells, specifically CD8+ T cells, in ADPKD progression. Hence, targeting this pathway using immune-oncology agents may represent a novel therapeutic approach for ADPKD.

Keywords: CD8(+) T cells; Pkd1 RC mouse model; adaptive immunity; autosomal dominant polycystic kidney disease.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptive Immunity*
  • Animals
  • Antineoplastic Agents, Immunological / therapeutic use
  • CD8-Positive T-Lymphocytes / microbiology*
  • Cell Line
  • Disease Models, Animal
  • Disease Progression
  • Epithelial Cells
  • Female
  • Humans
  • Immunotherapy / methods
  • Kidney / cytology
  • Kidney / immunology
  • Kidney / pathology
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Mice, Transgenic
  • Mutation
  • Polycystic Kidney, Autosomal Dominant / genetics
  • Polycystic Kidney, Autosomal Dominant / immunology*
  • Polycystic Kidney, Autosomal Dominant / pathology
  • Polycystic Kidney, Autosomal Dominant / therapy
  • Signal Transduction / immunology
  • TRPP Cation Channels / genetics

Substances

  • Antineoplastic Agents, Immunological
  • TRPP Cation Channels
  • polycystic kidney disease 1 protein