[Effect of nuclear factor-kappaB activation on expression of proinflammatory cytokines in rat lung tissues in early stage of burn injury].
OBJECTIVE
To investigate the effect of nuclear factor-kappaB (NF-kappaB) activation on the expression of proinflammatory cytokines in the lung tissues of rats with early-stage burn injury.


METHODS
Wistar rats were randomly divided into 3 groups, namely the normal control, burn, burn and PDTC treatment groups, and in the latter two groups, the rats were subjected to 35% TBSA full-thickness burns. Activation of pulmonary NF-kappaB at 1, 3, 6, 12, and 24 postburn hour (PBH) was tested by electrophoretic mobility shift assay , and the expressions of pulmonary tumor necrosis factor alpha (TNF alpha) and interleukin-8 (IL-8) mRNAs at 3, 6, 12, and 24 h were detected by RT-PCR.


RESULTS
Compared to that of the control group, activity of pulmonary NF-kappaB in burned rats was markedly increased within 1 PBH and kept increasing till 24 h. Expressions of pulmonary TNF alpha and IL-8 mRNAs increased gradually, reaching the peak level at 6 PBH, and PDTC could effectively inhibit pulmonary NF-kappaB activation and expression of the pulmonary cytokines induced by the burn injury.


CONCLUSIONS
Severe burn injury may activate pulmonary NF-kappaB, which ultimately leads to secretion of cytokines in the lung tissues.
Li
Zhi-Qing
ZQ
Department of Burns, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
Huang
Yue-Sheng
YS
Yang
Zong-Cheng
ZC
Wang
Jia-Han
JH
D000818:Animals; D002056:Burns / Q000276:immunology* / Q000473:pathology; D004195:Disease Models, Animal; D015870:Gene Expression; D006801:Humans; D018836:Inflammation Mediators / Q000276:immunology*; D016209:Interleukin-8 / Q000235:genetics* / Q000276:immunology; D008168:Lung / Q000276:immunology* / Q000473:pathology; D016328:NF-kappa B / Q000235:genetics / Q000276:immunology*; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics* / Q000276:immunology
D018836:Inflammation Mediators; D016209:Interleukin-8; D016328:NF-kappa B; D014409:Tumor Necrosis Factor-alpha