Published in:
Open Access 01-12-2011 | Research
T cell subpopulations in lymph nodes may not be predictive of patient outcome in colorectal cancer
Published in: Journal of Experimental & Clinical Cancer Research | Issue 1/2011
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Background
The immune response has been proposed to be an important factor in determining patient outcome in colorectal cancer (CRC). Previous studies have concentrated on characterizing T cell populations in the primary tumour where T cells with regulatory effect (Foxp3+ Tregs) have been identified as both enhancing and diminishing anti-tumour immune responses. No previous studies have characterized the T cell response in the regional lymph nodes in CRC.
Methods
Immunohistochemistry was used to analyse CD4, CD8 or Foxp3+ T cell populations in the regional lymph nodes of patients with stage II CRC (n = 31), with (n = 13) or without (n = 18) cancer recurrence after 5 years of follow up, to determine if the priming environment for anti-tumour immunity was associated with clinical outcome.
Results
The proportions of CD4, CD8 or Foxp3+ cells in the lymph nodes varied widely between and within patients, and there was no association between T cell populations and cancer recurrence or other clinicopathological characteristics.
Conclusions
These data indicate that frequency of these T cell subsets in lymph nodes may not be a useful tool for predicting patient outcome.