Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\7961125
.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
1994 ; 85
(9
): 952-7
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Inhibition of tumor necrosis factor-alpha and -beta secretion by lymphokine
activated killer cells by transforming growth factor-beta
#MMPMID7961125
Naganuma H
; Sasaki A
; Satoh E
; Nagasaka M
; Nakano S
; Isoe S
; Tasaka K
; Nukui H
Jpn J Cancer Res
1994[Sep]; 85
(9
): 952-7
PMID7961125
show ga
Transforming growth factor-beta (TGF-beta) has a variety of immunosuppressive
properties. We investigated the effect of TGF-beta secreted by glioblastoma
(T98G) cells on the secretion of tumor necrosis factor-alpha and -beta (TNFs) by
lymphokine activated killer (LAK) cells stimulated with tumor cells. The
supernatant from T98G cells was preincubated with anti-TGF-beta 1 and -beta 2
neutralizing antibodies or untreated, and added to a coculture of LAK and Daudi
cells. The neutralizing antibodies were added to LAK/Daudi and LAK culture, and
natural human TGF-beta 1 and recombinant human TGF-beta 2 were also added to the
LAK/Daudi culture. LAK cells were also cultured with T98G cells, of which the
supernatant contained both active and latent forms of TGF-beta 1 and TGF-beta 2,
and the neutralizing antibodies were added to the coculture. TNFs activity in the
supernatants from LAK/Daudi cultures was examined by a specific bioassay.
Addition of the supernatant from T98G cells to LAK/Daudi culture resulted in the
inhibition of TNFs secretion by LAK cells. The inhibition was abrogated by the
pretreatment of the supernatants with the anti-TGF-beta antibodies. Addition of
TGF-beta 1 and TGF-beta 2 to LAK/Daudi culture inhibited TNFs secretion by LAK
cells in a dose-dependent manner. Addition of anti-TGF-beta antibodies to LAK
culture resulted in an increase of TNFs secretion. These results suggest that, if
tumor cells have the capacity to convert TGF-beta from a latent to an active
form, the active TGF-beta suppresses TNFs secretion by LAK cells stimulated with
the tumor cells, and that TGF-beta secreted and activated by glioblastoma cells
suppresses the propagation of immune reaction by inhibiting TNFs secretion by
activated lymphocytes adjacent to tumor cells.