an increasing trendP < 0.01
An increasing trend in the content of TNF-α, IFN-γ, IL-6, IL-8 and IL-12 was recorded in the HLU group as compared to those in the control group ( P < 0.01), while the levels of IL-4 and IL-10 were declined ( P < 0.01) (Fig. 6a – g ).