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J Immunol Methods. 2009 Aug 31;348(1-2):9-17. doi: 10.1016/j.jim.2009.06.004. Epub 2009 Jun 22.

Characterization of the intra-prostatic immune cell infiltration in androgen-deprived prostate cancer patients.

Author information

1
Research Centre of the Centre Hospitalier de l'Université de Montréal (CRCHUM), Notre-Dame Hospital and Institut du cancer de Montréal. 1560 Sherbrooke East, Montréal, Québec, Canada.

Abstract

INTRODUCTION:

Our goal was to study the hormonal regulation of immune cell infiltration in prostate cancer patients treated by androgen deprivation therapy (ADT) using an optimized computer-assistance quantification approach.

METHODS:

The relative density of immune cell subtypes (CD3(+), CD8(+), CD20(+), CD56(+), CD68(+) and Foxp3(+)) was analyzed by immunohistochemistry in archived prostate specimens from control patients (radical prostatectomy only, n=40) and ADT-treated patients (ADT prior to radical prostatectomy, n=35) using an image analysis software and a whole-slide scanner.

RESULTS:

ADT-treated patients had significantly increased relative density of CD3(+) (p<0.001) and CD8(+) T lymphocytes (p<0.001) as well as CD68(+) macrophages (p<0.001). Elevated abundance of CD56(+) Natural Killer (NK) cells was associated with a lower risk of prostate cancer progression (p=0.044), while a high density of CD68(+) macrophages was related to an increased risk of biochemical recurrence (p=0.011).

CONCLUSIONS:

Our results demonstrate that the infiltration of specific immune cell subtypes is modulated by ADT. Furthermore our data confirm that NK cells have a protective role against tumor progression while macrophages seem to favor the development of advanced prostate cancer.

PMID:
19552894
DOI:
10.1016/j.jim.2009.06.004
[Indexed for MEDLINE]

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