血小板活化因子及其受体与皮肤炎症

血小板活化因子（platelet-activating factor,PAF)是一种高生理活性的磷脂介质，具有广泛的生物学作用，参与体内多种疾病的发病过程。近年来发现，PAF系统参与表皮角质形成细胞功能和皮肤炎性反应，与许多皮肤炎症有密切联系。同时人体角质形成细胞能够表达功能性的PAF受体，并参与诱导表皮细胞因子网络，与其他炎性介质相互作用，对皮肤炎症的发生起协同放大的效应。

Platelet-activating factor and its receptor related with skin inflammation

Platelet activating factor(PAF), a potent phospholipid mediator of inflammation, has diverse physiological actions and participates in many diseases in vivo . In recent years, it has been revealed that PAF system involve in the expression of keratinocytes function and reaction of skin inflammation. Therefore, PAF system was found closely associated with inflammatory skin disease. Keratinocytes could express functional PAF receptors (PAF R) and involve in the action of epidermis cytokine system. The interaction between PAF system and other inflammatory mediators can lead to skin inflammatory cascade.