scholarly journals Constitutive activity of the tumor necrosis factor promoter is canceled by the 3' untranslated region in nonmacrophage cell lines; a trans-dominant factor overcomes this suppressive effect.

1992 ◽  
Vol 89 (2) ◽  
pp. 673-677 ◽  
Author(s):  
V. Kruys ◽  
K. Kemmer ◽  
A. Shakhov ◽  
V. Jongeneel ◽  
B. Beutler
Keyword(s):  
Tumor Necrosis Factor ◽  
Cell Lines ◽  
Untranslated Region ◽  
Tumor Necrosis ◽  
Suppressive Effect ◽  
Dominant Factor ◽  
Constitutive Activity ◽  
Necrosis Factor

Effect of interferon α, γ, and tumor necrosis factor α on the HLA-A, B, C expression of cell lines derived from human liver

2008 ◽  
Vol 9 (1) ◽  
pp. 14-19 ◽  
Author(s):  
Kentaro Yoshioka ◽  
Shinichi Kakumu ◽  
Hirofumi Tahara ◽  
Motohiro Arao ◽  
Akihiko Fuji
Keyword(s):  
Tumor Necrosis Factor ◽  
Cell Lines ◽  
Human Liver ◽  
Tumor Necrosis ◽  
Tumor Necrosis Factor Α ◽  
Interferon Α ◽  
Factor Α ◽  
Necrosis Factor

Cytokine Regulation of Gelatinase Production by Head and Neck Squamous Cell Carcinoma: The Role of Tumor Necrosis Factor-Alpha

1995 ◽  
Vol 104 (3) ◽  
pp. 203-209 ◽  
Author(s):  
Eric A. Mann ◽  
Margaret S. Hibbs ◽  
Xtn Ze Wang ◽  
Jeffrey D. Spiro ◽  
Michael Clawson ◽  
...  
Keyword(s):  
Squamous Cell Carcinoma ◽  
Tumor Necrosis Factor ◽  
Cell Carcinoma ◽  
Head And Neck ◽  
Cell Lines ◽  
Tumor Necrosis ◽  
Invasion And Metastasis ◽  
Tnf Α ◽  
Necrosis Factor ◽  
Stimulation Of

Gelatinases (GLs) belong to a family of enzymes known as matrix metalloproteinases (MMPs), which are produced by both normal and neoplastic cells. These enzymes have been implicated in tumor invasion and metastasis, although the mechanism of regulation of tumor MMP production is unknown. Since our previous studies have shown that numerous cytokines are present in the tumor microenvironment, our goal was to establish the effect of selected cytokines on GL production by both established tumor cell lines and primary cultures of head and neck squamous cell carcinoma (HNSCC). Supernatants of HNSCC cell lines SCC-25 and FADU stimulated with interleukin (IL)-1α and IL-1β demonstrated modest induction of 92 kd GL production by zymogram analysis when compared with controls; IL-2, IL-6, and interferon-γ had no consistent effect on MMP production. Stimulation of cell lines with tumor necrosis factor (TNF)-α (104 to 10 U/mL), however, dramatically enhanced production of 92 kd GL by both cell lines in a dose-dependent fashion, although tissue inhibitor of metalloproteinase (TIMP) expression was unaffected. Northern blot analysis showed that this enhancement of 92 kd GL occurred at the messenger RNA level. Stimulation of short-term primary tumor cultures with TNF-α resulted in significant enhancement of 92 kd GL expression in one of four cultures and enhancement of 72 kd GL expression in all cultures. The observed increase in GL expression by TNF-α suggests a role for this cytokine in the regulation of GL expression by tumor cells during invasion and metastasis.

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