IL-1-induced iNOS expression in human astrocytes via NF-kappa B.
Nitric oxide (NO) plays an important role in host defense as well as cell injury within the CNS. In contrast to rodent species, human astrocytes are the major glial source of NO. Although interleukin (IL)-1 stimulates astrocyte inducible NO synthase (iNOS) expression, the mechanism is poorly defined. In the present study using primary human fetal astrocyte cultures, we found that IL-1 beta stimulated activation of nuclear factor kappa B (NF-kappa B) within 2 h, iNOS mRNA expression at 8 h, and maximal NO production by 5 days post-treatment. This IL-1-induced activation of astrocyte iNOS was suppressed by pyrrolidine dithiocarbamate, an inhibitor of NF-kappa B activation, suggesting involvement of a NF-kappa B mechanism.
Chao
C C
CC
Neuroimmunobiology and Host Defense Laboratory, Minneapolis Medical Research Foundation, MN, USA.
Lokensgard
J R
JR
Sheng
W S
WS
Hu
S
S
Peterson
P K
PK
D001253:Astrocytes / Q000187:drug effects* / Q000378:metabolism; D002478:Cells, Cultured; D004790:Enzyme Induction; D006801:Humans; D007375:Interleukin-1 / Q000494:pharmacology*; D016328:NF-kappa B / Q000494:pharmacology*; D019001:Nitric Oxide Synthase / Q000096:biosynthesis*; D011994:Recombinant Proteins / Q000494:pharmacology
D007375:Interleukin-1; D016328:NF-kappa B; D011994:Recombinant Proteins; D019001:Nitric Oxide Synthase