Frequency of regulatory T cells in renal cell carcinoma patients and investigation of correlation with survival

Richard W. Griffiths, Eyad Elkord, David E. Gilham, Vijay Ramani, Noel Clarke, Peter L. Stern, Robert E. Hawkins

Research output: Contribution to journalArticlepeer-review

175 Citations (Scopus)


Background: Regulatory T cells are important in maintaining immune homeostasis, mediating peripheral tolerance and preventing autoimmunity. Increased frequencies of CD4+CD25high T regulatory (T Reg) cells have been documented in the peripheral blood of patients with several types of cancer consistent with a role in tumour escape from immunological control. We have investigated the presence of TReg cells systemically and in situ in previously untreated patients with renal cell carcinoma (RCC). Results: We have shown that there is a significant increased frequency of CD4+CD25high T cells in RCC patients (n = 49) compared to normal donors (n = 38), respectively, 2.47% versus 1.50%; P < 0.0001. We confirmed these data using the FOXP3 marker of TReg cells in a subset of these patients and normal donors. The population of T Reg cells identified showed the expected phenotype with CD4 +CD25high population in both RCC patients and normal donors contained higher proportions of CD45RO and GITR than CD4 +CD25-/low populations and exhibiting suppressive activity in an anti-CD3 and anti-CD28 induced proliferation assay. CD4 +FOXP3+ T cells were detected in the tumour microenvironment by immunofluorescence and the numbers enumerated in lymphocytes recovered following enzymatic disaggregations of biopsies; their frequency was higher in the tumour than the peripheral blood of the same patients. The early follow up data show an association between higher peripheral blood regulatory T-cell count and adverse overall survival. Conclusion: These data confirm the increase of TReg cells in RCC patients and provide impetus to further investigate modulation of TReg activity in RCC patients as part of therapy.

Original languageEnglish
Pages (from-to)1743-1753
Number of pages11
JournalCancer Immunology, Immunotherapy
Issue number11
Publication statusPublished - Nov 2007
Externally publishedYes


  • Renal cell carcinoma
  • Survival
  • T regulatory cells

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Oncology
  • Cancer Research


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