scholarly journals Opposing role of tumor necrosis factor receptor 1 signaling in T cell-mediated hepatitis and bacterial infection in mice

Hepatology ◽  
2016 ◽  
Vol 64 (2) ◽  
pp. 508-521 ◽  
Author(s):  
Raluca Wroblewski ◽  
Marietta Armaka ◽  
Vangelis Kondylis ◽  
Manolis Pasparakis ◽  
Henning Walczak ◽  
...  
1996 ◽  
Vol 183 (2) ◽  
pp. 669-674 ◽  
Author(s):  
S Y Lee ◽  
C G Park ◽  
Y Choi

CD30 is a member of the tumor necrosis factor superfamily and a surface marker for Hodgkin's disease. Normal activated T cells and several virally transformed T or B cell lines also show CD30 expression. The interaction of CD30 with its ligand induces cell death or proliferation, depending on the cell type. In this report we characterize the signals mediated by the intracellular domain of CD30 and show that, in combination with signal(s) transduced by the T cell receptor, the multimerization of CD30 cytoplasmic domain induces Fas(CD95)-independent cell death in T cell hybridomas. Deletion analysis shows that the COOH-terminal 66 amino acids of CD30 are required to induce cell death. Using the yeast two-hybrid system, we have identified that the same region of CD30 interacts with tumor necrosis factor receptor-associated factor (TRAF)1 and TRAF2. These results indicate that TRAF1 and/or TRAF2 play an important role in cell death in addition to their previously identified roles in cell proliferation.


2005 ◽  
Vol 50 (9) ◽  
pp. 1669-1676 ◽  
Author(s):  
Minoru Nakai ◽  
Kaori Sudo ◽  
Yasuhiro Yamada ◽  
Yasushi Kojima ◽  
Tomohiro Kato ◽  
...  

2016 ◽  
Vol Volume 11 ◽  
pp. 1705-1712 ◽  
Author(s):  
Masaki Fujita ◽  
Ouchi Hiroshi ◽  
Satoshi Ikemage ◽  
Eiji Harada ◽  
Takemasa Matsumoto ◽  
...  

2000 ◽  
Vol 68 (3) ◽  
pp. 1243-1251 ◽  
Author(s):  
Yi-Xue Zhao ◽  
Ginette Lajoie ◽  
Hongwei Zhang ◽  
Basil Chiu ◽  
Ursula Payne ◽  
...  

ABSTRACT Tumor necrosis factor (TNF) has generally been regarded as a protective cytokine in host defense against bacterial infections. In the present study, we evaluated the role of TNF in the acute phase of infection by Yersinia enterocolitica by using mice rendered genetically deficient in TNF receptor p55 (TNFRp55−/−). Unexpectedly, TNFRp55−/− mice showed more effective resistance to the bacteria, reflected in enhanced bacterial clearance and less tissue damage, than did control C57BL/6 mice. C57BL/6 mice showed evidence of extensive apoptosis in the spleen accompanied by a selective decrease in the CD4+-T-cell population of splenocytes, whereas TNFRp55−/− mice were spared these changes. The splenocytes from TNFRp55−/− mice also maintained a robust gamma interferon IFN-γ response to mitogenic stimulation, while the comparable response in C57BL/6 mice was impaired. In addition, splenocytes harvested from infected mice demonstrated lower production of interleukin-10 IL-10 in TNFRp55−/− mice than in C57BL/6 mice. These findings suggest that Yersinia can induce TNFRp55-mediated apoptosis of splenocytes in the acute phase of the infection and that alteration of T-cell-generated cytokines can dramatically alter the early events in host defense against this pathogen.


2003 ◽  
Vol 23 (11) ◽  
pp. 4026-4033 ◽  
Author(s):  
Hidetoshi Takada ◽  
Nien-Jung Chen ◽  
Christine Mirtsos ◽  
Shinobu Suzuki ◽  
Nobutaka Suzuki ◽  
...  

ABSTRACT Signaling from tumor necrosis factor receptor type 1 (TNFR1) can elicit potent inflammatory and cytotoxic responses that need to be properly regulated. It was suggested that the silencer of death domains (SODD) protein constitutively associates intracellularly with TNFR1 and inhibits the recruitment of cytoplasmic signaling proteins to TNFR1 to prevent spontaneous aggregation of the cytoplasmic death domains of TNFR1 molecules that are juxtaposed in the absence of ligand stimulation. In this study, we demonstrate that mice lacking SODD produce larger amounts of cytokines in response to in vivo TNF challenge. SODD-deficient macrophages and embryonic fibroblasts also show altered responses to TNF. TNF-induced activation of NF-κB is accelerated in SODD-deficient cells, but TNF-induced c-Jun N-terminal kinase activity is slightly repressed. Interestingly, the apoptotic arm of TNF signaling is not hyperresponsive in the SODD-deficient cells. Together, these results suggest that SODD is critical for the regulation of TNF signaling.


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