Abstract:Objective: To investigate the compatibility regularity of components (emodin,aloe-emodin,magnolol and honokiol) in Rhei Radix et Rhizoma and Magnoliae Officinalis Cortex by uniform design and partial least squares regression combined with factor analysis. Method: SD rats were randomly divided into 8 groups,including sham-operated group,model group and six compatibility groups.The rat model of acute pancreatitis was established by the retrograde injection of 3.5% sodium taurocholate.Abdominal aortic blood was drawn at 6 hour and 24 hour for determination of serum amylase(AMS),pancreatic lipase(PL),interleukin-6(IL-6),IL-10 and tumor necrosis factor-α(TNF-α).The partial least squares regression was adopted to explore the influence law of factors on efficacy index,and factor analysis was used to extract the public factors in indexes. Result: The influence degree of each component on acute pancreatitis was in the order of magnolol>honokiol>emodin>aloe-emodin.Factor analysis extracted two public factors,such as pancreatic injury factors(AMS,IL-6 and TNF-α) and inflammatory factors(PL and IL-10). Conclusion: This method,uniform design-partial least squares regression combined with factor analysis,can effectively clarify the correlation and regularity between many factors and many components,which can provide more suitable effect formulas for clinical symptoms.