Immune suppression and skin cancer development: regulation by NKT cells

10.1038/82782 ◽  
2000 ◽  
Vol 1 (6) ◽  
pp. 521-525 ◽  
Author(s):  
Angus M. Moodycliffe ◽  
Dat Nghiem ◽  
Gavin Clydesdale ◽  
Stephen E. Ullrich
2021 ◽  
Vol 141 (5) ◽  
pp. S11
Author(s):  
A. Shahid ◽  
M. Huang ◽  
S. Yeung ◽  
C. Parsa ◽  
R. Orlando ◽  
...  

2002 ◽  
Vol 195 (2) ◽  
pp. 171-179 ◽  
Author(s):  
Jeffrey P. Walterscheid ◽  
Stephen E. Ullrich ◽  
Dat X. Nghiem

Ultraviolet (UV) radiation plays a critical role in the induction of nonmelanoma skin cancer. UV radiation is also immune suppressive, and the immune suppression induced by UV irradiation has been identified as a major risk factor for skin cancer induction. Previously, we showed that UV exposure activates a cytokine cascade involving prostaglandin (PG)E2, interleukin (IL)-4, and IL-10 that induces immune suppression. However, the earliest molecular events that occur immediately after UV exposure, especially those upstream of PGE2, are not well defined. UV-irradiated keratinocytes secrete the inflammatory phospholipid mediator, platelet-activating factor (PAF). Because PAF upregulates the production of immunomodulatory compounds, including PGE2, we tested the hypothesis that UV-induced PAF activates cytokine production and initiates UV-induced immune suppression. Both UV and PAF activated cyclooxygenase (COX)-2 and IL-10 reporter gene construct transcription. PAF mimicked the effects of UV in vivo and suppressed delayed-type hypersensitivity (DTH). Furthermore, immune suppression was blocked when UV-irradiated mice were injected with PAF receptor antagonists. In addition to the well-known role of PAF as a proinflammatory lipid mediator, we propose that the PAF receptor senses cellular damage through the recognition of PAF and/or PAF-like molecules, such as oxidized phosphatidylcholine, which activates cytokine transcription and induces systemic immune suppression.


2005 ◽  
Vol 30 (6) ◽  
pp. 717-718 ◽  
Author(s):  
G. F. Graham ◽  
F. Camacho ◽  
I. Roseborough ◽  
S. Taylor ◽  
B. Gratton ◽  
...  

2020 ◽  
Vol 37 (5) ◽  
pp. 807
Author(s):  
Xiyong Huang ◽  
Michael D. Protheroe ◽  
Ahmed M. Al-Jumaily ◽  
Sharad P. Paul ◽  
Andrew N. Chalmers

Author(s):  
V Lichte ◽  
B Dennenmoser ◽  
K Dietz ◽  
H-M Häfner ◽  
B Schlagenhauff ◽  
...  

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