This study was aimed to establish a method for the determination of octylacetate in Jing-Fu-Kang (JFK) granules. The content was determined by GC with Agilent HP-5 (30 m × 0.32 mm × 0.25μm) capillary column, with hydrogen flame ionization (FID) as detector. The injector temperature was 220℃. The detector temperature was 260℃. The split ratio was 20:1. At first, the temperature should be maintained to 80℃for 2 min, and then heating up to 200℃with the speed of 10℃·min-1. This temperature was maintained for 10 min. The results showed that the good linear relationship of octylacetate was within the range of 0.156 5-7.824 2 mg·mL-1, r=0.999 9. The average recovery rate was 100.00%, and RSD was 1.91%(n=9). The lowest detection limit of octylacetate was 1.633 6 ng. It was concluded that the established method was simple and reproducible with no interference. It can be applied to the quality control of JFK granules.

OBJECTIVE:To establish a method for simultaneous determination of the contents of geniposide and liquiritin in Xinshenning tablets. METHODS:HPLC was performed on the column of Inertsil ODS-3 with mobile phase of acetonitrile-water (gradient elution) at flow rate of 1.0 ml/min,the column temperature was 25 ℃,detection wavelength was 238 nm and the vol-ume was 10 μl. RESULTS:The mass concentration range was 16.3-407.9 μg/ml for geniposide(r=0.999 9) and 7.4-185.9 μg/ml for liquiritin(r=0.999 9);RSDs of precision,stability and reproducibility tests were no more than 1.63%;average recoveries were 99.05%(RSD=1.28%,n=9)and 98.00%(RSD=1.84%,n=9),respectively. CONCLUSIONS:The established method is accu-rate,sensitive and simple,and can be used for the contents determination of geniposide and liquiritin in Xinshenning tablets.

Objective To study the relationship between viral infection and chronic obstructive pulmonary disease (COPD),and the effect of viral infections on the changes of Th1/Th2 in COPD patients. Methods The se-ra from 81 patients with acute exacerbations of COPD,25 patients with stable COPD and 22 healthy subjects were tested for specific IgM of respiratary syncytial virus(RSV) ,herpes simplex virus type 1 (HSV-1), parainfluenza vi-rus (PIV), adenovirus (ADV) and cytomegalovirus (CMV) by indirect enzyme-linked immunosorbent assay (ELISA). Supernatant INF-γ and IL-4 cultured with PHA were determined. Results The positive rates of IgM in patients with acute exacerbations of COPD compared with those in patients with stable COPD and healthy subjects were significantly different(P <0.001 ). The level of INF-γ, and IL-4 in patients with acute exacerbations of COPD and stable COPD compared with normal control group;the level of INF-γ (242±43) and the of IL-4(42±9) in pa-tients with acute exacerbations of COPD was not significantly different as compared with the level of INF-γ( 198±32) and the level of IL-4(56±11 ) in patients with stable COPD (P<0.05), but the level of INF-γ was increased (90±18)and IL-4 was decreased (141±24) in control group (P<0.05). Compared with those in IgM negative group, the levels of INF-γ were significantly higher and the levels of IL-4 were significantly lowerIL-4 in lgM positive group( P<0.01 ). Conclusion Virus infection is a rather important factor in acute exacerbations of COPD, and COPD is characterized by a predominance of Th1-type response,and there is more significant Th1 response predomi-nance in COPD with virus infection.

Objective: To explore the possible mechanism of Duhuo Jisheng Tang in relieving knee osteoarthritis based on protein kinase R-like endoplasmic reticulum kinase (PERK)/immunoglobulin-binding protein (Bip) signaling pathway.Method: A model of knee osteoarthritis was established by cold stimulation.Rats were randomly divided into blank group,model group,celecoxib group (0.021 g·kg^-1),low,medium and high-dose Duhuo Jisheng Tang groups (8.37,16.72,33.48 g·kg^-1).Blank group and model group were given equal volume of physiological saline.The changes of knee joint diameter were recorded.The pathological changes of rat articular cartilage were observed by hematoxylin-eosin (HE) staining.The expressions of tumor necrosis factor-alpha (TNF-α),interleukin-1β(IL-1β) and hyaluronic acid (HA) in serum were detected by enzyme-linked immunosorbent assay (ELISA).The mRNA and protein expression levels of PERK,Bip and cysteinyl as parates pecific protein-9(Caspase-9) in cartilage were detected by Real-time PCR and Western blot.Result: The knee joint redn ess and the joint diameter of celecoxib group and high-dose Duhuo Jisheng Tang group were improved,and the joint diameter was reduced significantly (P<0.01).The local fractures of knee joint cartilage in the celecoxib group and the high-dose Duhuo Jisheng Tang group were significantly improved.Compared with blank group,the expression levels of TNF-α,IL-1β and HA were increased in model group (P<0.01).The gene and protein expression levels of PERK,Bip and Caspase-9 in cartilage of the model group were increased (P<0.05,P<0.01).Compared with model group,the expressions of TNF-α,IL-1β and HA in serum of celecoxib group and high-dose Duhuo Jisheng Tang group were decreased (P<0.05,P<0.01).The mRNA and protein expression levels of PERK,Bip and Caspase-9 in cartilage of celecoxib group and high-dose Duhuo Jisheng Tang group were decreased (P<0.05,P<0.01).Conclusion: Duhuo Jisheng Tang can alleviate the symptoms of knee osteoarthritis model rats,and its mechanism may be related to the regulation of PERK/Bip signaling pathway in rat cartilage.