Objective: To study the role of pro-inflammatory cytokines including tumor necrosis factor-alpha(TNF-alpha), interleukin-1beta(IL-1beta), IL-6, and anti-inflammatory cytokines including IL-4, IL-10, and IL-13 in acute lung injury(ALI).
Methods: Reverse transcription-polymerase chain reaction(RT-PCR) were used to assess the expressions of mRNA of TNF-alpha, IL-1beta, IL-6, IL-4, IL-10 and IL-13 in the lung tissue after lipopolysaccharide challenge.
Results: The expression of TNF-alpha mRNA was seen to peak at 1 hour and IL-6 mRNA at 4 hours in lung tissue after the challenge. The highest expression of mRNA of other cytokines, such as IL-1beta, IL-4, IL-10 and IL-13 in lung tissue appeared 2 hours after LPS-induced lung injury.
Conclusion: TNF-alpha is an early presenting cytokine in ALI, and IL-6 may play an important role in delayed development of ALI. The over-expression of anti-inflammatory cytokines IL-4, IL-10 and IL-13 may act as promoters rather than protectors in amplification of inflammatory process.
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