Studies on the anti-inflammatory molecular mechanism of chlorogenic acid extracted from Lonicera confusa DC in vitro / 中国药理学通报

ABSTRACT

Aim To investigate the anti-inflammatory molecular mechanism of chlorogenic acid extracted from Lonicera confusa DC in vitro.Methods PM? of a rat was segregated.MTT assay was used to detect the effects of the chlorogenic acid on PM? cells growth activities. PM? was stimulated with LPS for a prolonged period,ELISA was used to detect the level of TNF-?,IL-6 and PGE2 in the supernatant;COX-2 activity was determined by the level of PGE2 in the supernatant.After stimulating PM? with A23187 for a short time,the 6-keto-PGF1? level in the supernatant was measured by radioimmunoassay to express COX-1 activity.Results Chlorogenic acid had no inhibitive effects between 31.25 mg?L-1 and 1000 mg?L-1.The level of TNF-?,IL-6 and PGE2 in drug groups was lower than that of LPS-induced group,and the difference was significant,in a dose-dependent manner.The concentration of 50 mg?L-1 group was ineffective in the expression of TNF-?.Low concentration chlorogenic acid inhibited the expression of 6-keto-PGF1?,while high-concentration induced it.Conclusions The anti-inflammatory effect of chlorogenic acid may be related to inhibiting TNF-?,IL-6 activity and affecting exogenous AA metabolism.