[Activation of nuclear factor-kappa B and its modulalorg effects on intercellular adhesion molecule-1 expression in mice with dextran sulphate sodium-induced rat colitis].
OBJECTIVE
To investigate the changes in the activity of nuclear factor-kappaB (NF-kappa B) in mice with dextran sulphate sodium (DSS)-induced rat colitis and its modulalorg effect on intercellular adhesion molecule-1 (ICAM-1) expression.


METHODS
Twenty normal male mice were randomized into DSS group and normal saline (NS) control group according to a matched-pair design. From days 1 to 7, the mice in DSS group were subjected to oral administration of 5%DSS solution, and from days 8 to 20, NS was given instead, for a total of 3 cycles. In the control group, only NS was administered. The colonic pathology was observed using HE staining and the mucosa 1 damage was scored for each mouse. The DNA-binding activity of NF-kappa B was tested by electrophoretic mobility shift assay, and the expressions of ICAM-1 and NF-kappa B p65 were detected using immunohistochemistry.


RESULTS
The DNA-binding activity of NF-kappa B was significantly increased in DSS group as compared with NS group. ICAM-1 and p65 expressions were detected in the nuclei of the vascular endothelial and inflammatory cells, especially in the mucosa and submucosa, but such positive cells were seldom observed in NS group. A positive correlation was found between the DNA-binding activity of NF-kappa B and ICAM-1 expression.


CONCLUSIONS
NF-kappa B activation is an important event in the development of DSS-induced colitis in that activated NF-kappa B upregulates ICAM-1 expression during colonic inflammation.
Yang
Ming-shi
MS
Department of Gastrointestinall Diseases, Affiliated Hospital of Guangdong Medical College, Zhanjiang 524001, China.
Long
You-ming
YM
Cui
Shu-lan
SL
D000818:Animals; D003092:Colitis / Q000139:chemically induced / Q000378:metabolism*; D004247:DNA / Q000378:metabolism; D016264:Dextran Sulfate; D024202:Electrophoretic Mobility Shift Assay; D007150:Immunohistochemistry; D018799:Intercellular Adhesion Molecule-1 / Q000096:biosynthesis*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D016328:NF-kappa B / Q000378:metabolism*; D011485:Protein Binding; D011897:Random Allocation; D051996:Transcription Factor RelA / Q000378:metabolism
D016328:NF-kappa B; D051996:Transcription Factor RelA; D018799:Intercellular Adhesion Molecule-1; D004247:DNA; D016264:Dextran Sulfate