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OBJECTIVE: To reflect the changes of medicine price level in China after canceling the maximum retail price limit, and to provide reference for the improvement of medicine price policy. METHODS: This research utilizes data of Chinese medicine economic information database of Chinese Pharmaceutical Association from January 2015 to March 2019 and compiles comprehensive and classified chained fisher price indexes among diverse policy control levels and different treatment categories. RESULTS: Over the past four years, the sale of west medicine(WM) by Chinese medical institutions showed a trend of decreasing price, with a decline of 13.99%. And the price of traditional Chinese medicine (TCM) showed a trend of first rising and then falling, with a decline of 3.54%. From the analysis on different policy control levels, the price of medical insurance WM, non-medical insurance WM, medical insurance TCM and non-medical insurance TCM decreased by 13.32%, 14.27%, 1.36% and 14.29%, respectively. The price of medical insurance TCM fell less. And the price of non-medical insurance TCM rose and fell too quickly in a short period of time, and its fluctuation was obvious. Among medical insurance medicines, the price of category A WM raised by 4.5%, while the prices of category B WM, category A TCM and category B TCM dropped by 15.90%, 0.66% and 1.47%, respectively. The price of essential WM, non-essential WM, essential TCM and non-essential TCM reduced by 13.72%, 13.90%, 3.70% and 3.60%, respectively. From the analysis on different treatment categories, the prices of diabetes medicines, hypertension medicines and systemic anti-infection medicines decreased by 6.78%, 10.42% and 12.72%, respectively. Anticancer medicines had largest price decline with 26.69%. CONCLUSION: After canceling the maximum retail price limit, the price of WM declines steadily, while the price of TCM first rises and then falls. The changes of medicine prices vary greatly at different policy control levels. The trends of medicine price reduction among different treatment categories are the same, but the differences are large.
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Objective To investigate the influence of rotenone neurotoxin on dopaminergic neurons from SD rats of different months and its mechanism.Methods Forty 3-month-old,4012-month-old and 40 20-month-old SD rats were chosen in our study and equally randomized into control group and rotenone treatment group,respectively(n=20); rotenone(1.0 mg/[kg·d])was given to the rats in the rotenone treatment group for 30 consecutive d(having drug withdrawal 1 d per week)to induce rotenone neurotoxin models.Tyrosine hydroxylase immunoreactivity in the substantia nigra pars compacta(SNpc)was observed.Levels of total superoxide dismutase(SOD)and catalase(CAT)were determined by colorimetric method and protein level of caspase-3 was determined by Western blotting.Results A significant decreased number of TH-positive cells in 3-,12-and 20-month-old rats of rotenone treatment group was noted as compared with that in the control group,respectively(P＜0.05),and 20-month-old rats had the fewest number.SOD and CAT activities in 3 month-old rats of the control group enjoyed the highest level and decreased trend was noted in 20 month-old rats of the control group;as compared with those in the control group,the SOD and CAT activities in all the rats of rotenone treatment group increased significantly(P＜0.05).Western blotting revealed that the expression of cleaved caspase-3 in all the rats of rotenone treatment group obviously increased as compared with those in the control group,and 20-month-old rats showed the highest level of active caspase-3.Conclusion Rotenone can induce the decrease of TH-positive cell level following the increase of rat age; increase levels ofcaspase-3 and oxidative stress may take part in the mechanism of high sensibility of old SD rats to rotenone.