FOXP3+ cell density in primary tumor has no prognostic impact in patients with cutaneous malignant melanoma

Pathol Oncol Res. 2010 Sep;16(3):303-9. doi: 10.1007/s12253-010-9254-x. Epub 2010 Mar 21.

Abstract

Regulatory T cells (Tregs) have been implicated as inhibitors of antitumor immune reactions. However, data on the relevance of their prevalence at tumor sites in influencing disease outcome are controversial. The aim of our study was to investigate the role in tumor progression and the prognostic impact of the density of lymphocytes expressing FOXP3, a transcription factor expressed predominantly by CD4(+)CD25(+) Tregs, in primary cutaneous melanoma. We examined the infiltration of FOXP3(+) cells by immunohistochemistry in tumor samples from 97 patients and evaluated in relation to patient and tumor parameters. The degree of infiltration by FOXP3(+) cells did not show correlation with the thickness of melanomas. Moreover, no associations were found with metastasis formation during the 5-year follow-up period, patient survival, or any other clinicopathologic parameters studied. These results suggest that the presence of FOXP3(+) lymphocytes in primary tumors is not of prognostic importance in human cutaneous melanoma.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Biomarkers, Tumor / analysis
  • Biomarkers, Tumor / immunology*
  • Female
  • Forkhead Transcription Factors / biosynthesis
  • Forkhead Transcription Factors / immunology*
  • Humans
  • Immunohistochemistry
  • Male
  • Melanoma / immunology*
  • Melanoma / mortality
  • Melanoma / pathology
  • Middle Aged
  • Neoplasm Staging
  • Prognosis
  • Skin Neoplasms / immunology*
  • Skin Neoplasms / mortality
  • Skin Neoplasms / pathology
  • T-Lymphocytes, Regulatory / immunology*
  • T-Lymphocytes, Regulatory / metabolism

Substances

  • Biomarkers, Tumor
  • FOXP3 protein, human
  • Forkhead Transcription Factors