Aim To investigate the effect of different concentration of serum amyloid P component( SAP) on inflammation and oxidative stress and its probable mechanism. Methods RAW264. 7 cells were divided into control and SAP group( 1. 25 mg / L,2. 5 mg / L,5 mg / L) with different concentrations of SAP co-culturing for 24 hours. Expression of intercellular adhesion molecule 1( ICAM-1) and Fc gamma receptor( FcγR) were measured by flow cytometry. ELISA and RT-PCR were used to measure inflammatory factors,IL-1β and TNF...