scholarly journals Phorbol Ester-dependent Activation of Peroxiredoxin I Gene Expression via a Protein Kinase C, Ras, p38 Mitogen-activated Protein Kinase Signaling Pathway

2003 ◽  
Vol 278 (46) ◽  
pp. 45419-45434 ◽  
Author(s):  
Alexander Hess ◽  
Nastiti Wijayanti ◽  
Andrea Pathe Neuschäfer-Rube ◽  
Norbert Katz ◽  
Thomas Kietzmann ◽  
...  
2001 ◽  
Vol 281 (6) ◽  
pp. G1405-G1412 ◽  
Author(s):  
T. Suzuki ◽  
E. Grand ◽  
C. Bowman ◽  
J. L. Merchant ◽  
A. Todisco ◽  
...  

Helicobacter pyloriand proinflammatory cytokines have a direct stimulatory effect on gastrin release from isolated G cells, but little is known about the mechanism by which these factors regulate gastrin gene expression. We explored whether tumor necrosis factor (TNF)-α and interleukin (IL)-1 directly regulate gastrin gene expression and, if so, by what mechanism. TNF-α and IL-1 significantly increased gastrin mRNA in canine G cells to 181 ± 18% and 187 ± 28% of control, respectively, after 24 h of treatment. TNF-α and IL-1 stimulated gastrin promoter activity to a maximal level of 285 ± 12% and 415 ± 26% of control. PD-98059 (a mitogen-activated protein kinase kinase inhibitor), SB-202190 (a p38 kinase inhibitor), and GF-109203 (a protein kinase C inhibitor) inhibited the stimulatory action of both cytokines on the gastrin promoter. In conclusion, both cytokines can directly regulate gastrin gene expression via a mitogen-activated protein kinase- and protein kinase C-dependent mechanism. These data suggest that TNF-α and IL-1 may play a direct role in Helicobacter pylori-induced hypergastrinemia.


1998 ◽  
Vol 273 (30) ◽  
pp. 19213-19219 ◽  
Author(s):  
Sung-Hee Chang ◽  
Chun-Do Oh ◽  
Myung-Soon Yang ◽  
Shin-Sung Kang ◽  
Young-Sup Lee ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document