Predominant Th2/Tc2 Polarity of Tumor-Infiltrating Lymphocytes in Human Cervical Cancer
Resource
JOURNAL OF IMMUNOLOGY v.167 n.5 pp.2972-2978
Journal
JOURNAL OF IMMUNOLOGY
Journal Volume
v.167
Journal Issue
n.5
Pages
2972-2978
Date Issued
2001
Date
2001
Author(s)
SHEU, BOR-CHING
LIEN, HUANG-CHUN
HSU, SU-MING
HUANG, SU-CHENG
Abstract
Cytotoxic T lymphocytes (Tc) play a central role in cellular immunity against cancers. The cytotoxic potential of freshly isolated tumor- infiltrating lymphocytes (TILs) is usually not expressed. This suggests the possible existence of as yet unspecified and perhaps complex immunosuppressive factors or cytokines that affect the anti-tumor capacity of these TILs in the tumor milieu. In the present study, we demonstrated for the first time that TILs derived from human cervical cancer tissue consist mainly of Th2/Tc2 phenotypes . In vitro kinetic assays further revealed that cancer cells could direct the tumor-encountered T cells toward the Th2/ Tc2 polarity. Cancer cells promote the production of IL-4 and down-regulate the production of IFN-gamma in cancer- encountered T cells. The regulatory effects of cervical cancer cells are mediated mainly by IL-10, and TGF-beta plays only a synergistic role. The cancer-derived effects can be reversed by neutralizing anti-IL-10 and anti-TGF-beta Abs. IL-10 and TGF-beta are present in cancer tissue and weakly expressed in precancerous tissue, but not in normal cervical epithelial cells. Our study strongly suggests important regulatory roles of IL-10 and TGF-beta in cancer- mediated immunosuppression.
Subjects
GROWTH-FACTOR-BETA
T-CELL SUBSETS
TGF-BETA
IN-VITRO
CARCINOMA
EXPRESSION
SDGs