Fig. 10From: Alkaloids from piper longum protect dopaminergic neurons against inflammation-mediated damage induced by intranigral injection of lipopolysaccharideEffects of PLA treatment on the concentrations of proinflammatory cytokines in the SN. Rats were randomly grouped and then treated with PLA (25, 50 and 75 mg/kg) or vehicle for 6 weeks after LPS injection. On day 42, rats were decapitated and the SN was used to detect the concentrations of TNF-α a IL-6 b and IL-1β c by commercial ELISA kit. n = 6. ** P < 0.01, *** P < 0.001 vs. sham group, # P < 0.05, ## P < 0.01 vs. LPS groupBack to article page