Objective

2

To evaluate the effect of Astragali Radix （AR）-Angelicae Sinensis Radix （ASR） drug pair on supplementing Qi and activating blood circulation in rats with Qi deficiency and blood stasis and provide a theoretical basis for clinical rational medication and identification and quality control of compound pharmacodynamic substances from the three aspects of characteristic map， identification of pharmacodynamic substances， and comparison of blood components.

Method

2

High-performance liquid chromatography （HPLC） was employed to establish the fingerprint of AR∶ASR （3∶1）， and ultra-high performance liquid chromatography-Q-Exactive Orbitrap-mass spectrometry （UPLC-Q-Exactive Orbitrap-MS） was employed to analyze the ingredients of the decoction. Adult male Wistar rats with SPF grades were selected and randomly divided into a blank group， a model group， a 3∶1 group， and a 5∶1 group. The rat model of Qi deficiency and blood stasis syndrome was prepared by controlling food intake and swimming in cold water every day. In parallel， each group was given medicine （or water） once a day. The dose of drug groups was 10.2 g∙kg

-1

， and the model group and blank group were given the same amount of distilled water for 15 d. Animal behavior， body weight， whole blood and plasma viscosity， thymus index， spleen index， the levels of adenosine triphosphate （ATP）， adenosine diphosphate（ADP）， von willebrand factor （vWF）， and ATP/ADP value in serum of rats were recorded. The morphology of vascular endothelium was observed by hematoxylin-eosin （HE） staining and scanning electron microscopy. UPLC-Q-Exactive Orbitrap-MS was used to analyze prototype and metabolic components in serum.

Result

2

The fingerprint of AR-ASR drug pair （AR-ASR 3∶1） was established. UPLC-Q-Exactive Orbitrap MS identified 49 chemical components

in vitro

and preliminarily identified 11 prototype components absorbed into blood

in vivo

. As compared with the blank group， the body mass decreased significantly （

P

<

0.01）， the whole blood （high shear， middle shear， and low shear） viscosity and plasma viscosity were significantly increased （

P

<

0.05，

P

<

0.01）， the thymus index and spleen index decreased significantly （

P

<

0.05，

P

<

0.01）， serum ATP content decreased significantly （

P

<

0.01）， ADP content increased significantly （

P

<

0.01）， ATP/ADP value decreased significantly （

P

<

0.01）， and vWF content increased significantly （

P

<

0.01）. The results of HE staining and scanning electron microscopy showed that the vessels were partially damaged， showing the structural disorder of the intima， the bulge， defect， and roughness of the endothelium， and the obvious cell adhesion and migration in the model group. As compared with the model group， the body mass also increased significantly （

P

<

0.01）. The results of whole blood and plasma viscosity showed that the whole blood low shear viscosity was significantly decreased in the 3∶1 group （

P

<

0.05）. The results of thymus index and spleen index showed that 5∶1 group significantly increased the thymus index of rats （

P

<

0.05）. The results of serum ATP and ADP levels showed that the 5∶1 group had more significant effects on ATP and ADP levels （

P

<

0.05）， and both groups significantly reduced ATP/ADP values （

P

<

0.01）. The results of serum vWF level showed that the vWF content in the 3∶1 group decreased significantly （

P

<

0.05）. The results of HE staining and scanning electronic microscopy showed that the damage of vascular endothelium was improved in the treatment group and the structure of intima was neat.

Conclusion

2

AR-ASR drug pair can improve the macro and micro indexes of rats with qi deficiency and blood stasis in the 3∶1 and 5∶1 groups. Overall， the 5∶1 ratio has a better effect on supplementing Qi but 3∶1 ratio has a better effect on promoting blood circulation.