highly significantP < 0.01
ation within the superficial and middle dermal layers following UVB exposure ( Figure 6 ). Relative mRNA Expression Levels of Inflammatory Factors in UVB-Induced Photodamage Cell and Mouse Models In the UVB cell model, IL-1β expression was markedly elevated ( P < 0.05), while IL-6 and TNF-α showed highly significant upregulation ( P < 0.01) versus the control group.