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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Jpn+J+Cancer+Res
1992 ; 83
(2
): 184-93
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Tumor-specific T cell lines: capacity to proliferate and produce interleukin 2 in
response to various forms of tumor antigens
#MMPMID1372887
Shimizu J
; Suda T
; Katagiri T
; Fujiwara H
; Hamaoka T
Jpn J Cancer Res
1992[Feb]; 83
(2
): 184-93
PMID1372887
show ga
Anti-tumor proliferative T cell lines were established from cultures of lymph
node cells from BALB/c mice immunized to syngeneic CSA1M fibrosarcoma with the
CSA1M tumor cell membrane. The cultures were maintained throughout in the absence
of exogenous interleukin 2 (IL2). Cell surface phenotypes of all T cell lines
established were Thy-1+, Ig-, L3T4+ and Lyt-2-. Their proliferation was induced
in a tumor antigen dose-dependent fashion and a tumor antigen-specific way. Such
proliferative responses were inhibited by the addition to cultures of anti-class
II H-2d (anti-I-Ad) or anti-L3T4 but not of anti-class I H-2d or anti-Lyt-2
monoclonal antibody. None of the T cell lines exhibited any cytotoxic T
lymphocyte activity but they all produced IL2 upon stimulation with CSA1M tumor
antigens, indicating that they represent helper-type T cell (Th) lines. The
activation of these tumor-specific Th lines was induced with either CSA1M tumor
cells themselves, or their membrane or detergent-solubilized fraction depending
on the presence of antigen-presenting cells (APC). Most importantly, activation
was also inducible by membranous tumor antigen-pulsed APC, which were capable of
producing potent anti-tumor protective immunity when administered in vivo into
syngeneic BALB/c mice. These results indicate that the tumor-specific Th lines
established here can be activated with various forms of tumor antigens for their
expression of helper function. Since Th lines of this type have not been
described previously, our Th lines provide an intriguing tool for investigating
the cellular and molecular mechanisms by which tumor-specific Th recognize tumor
antigens.