OBJECTIVE： To study the method of measuring the in vitro dissolubility of lansoprazole enteric－ coated tablets and to find out the difference between the dissolubility of lansoprazole enteric－ coated tablets and that of lansoprazole enteric－ coated capsules.METHODS： To establish a measuring method of the dissolubility of lansoprazole enteric－ coated tablets and compare the dissolubility of lansoprazole enteric－ coated tablets with that of lansoprazole enteric－ coated capsules and to acquire the dissolving parameters for variance analysis.RESULTS： (1)The accumulative dissolving quantity of the both preparations exceeded 80％ in 30 minutes.(2)The comparison of Weibull parameters,T50,Td and m,between each other in group A showed no significant differences(P>0.05).It was the same for those of group B.(3)The parameters,T50 and Td,of group A,in comparison with those of group B,showed significant differences(P<0.001).The times needed for dissoiving 50％ and 63.2％ of quantity in group B were both shorter than those in group A.The m parameters in different groups had no significant differences(P>0.05).There was no significant difference in slope of equation between two groups.CONCLUSION： This measuring method of the in vitro dissolubility of lansoprazole enteric－ coated tablets is simple,convenient,accurate,stable,feasible and good in repetition.It is concluded that there is significant difference between the dissolubility of the two dosage forms of enteric－ coated preparation of lansoprazole.

For recently 30 years,with the progress of science,the development of intracavitary technology has been constantly improved and expanded.Reascularization technology makes the cure of vaso-occlusive disease a great leap.Because of its small trauma,repeatable,high security,near future curative effect,interventional therapy is distinctly superior to the traditional treatment such.Peripheral vascular lumen treatments including the balloon dilatation,stent-assisted angioplasty,catheter guided thrombolysis,and percutaneous mechanical thrombectomy,etc.Although angioplasty has become the best choice but the preferred treatment has limitations,such as for long and severe calcification of arteries occlusion surgery is difficult,immediate and long-term patency rate is low,the postoperative complications is frequent;Used for plaque ulcer and potentially thromboembolic disease,body highly risks of distal embolization;Inherent retraction force for postoperative lumen,intimal inflammation restenosis,stent thrombosis cause problems frequently.However,the percutaneous mechanical thrombectomy system is aimed at solving the clinical problems with good combination of engineering and technology research.The purpose of this paper is to expound the existing mechanical embolus removal system:SilverHawk/TurbjHawk aod Straub Rotarex thrombus,that is to elaborate its development status and clinical analysis.

ObjectiveTo investigate the protective effect of Zhuangtongyin on the Middle Cerebral Artery Occlusion （MCAO） model by modulating ferroptosis through the Nrf2-SCL7A11/xCT-Gpx4 pathway and its underlying mechanism. MethodsC57BL/6J mice were randomly divided into Sham operation group （Sham）， model group （MCAO）， low-dose Zhuangtongyin group （ZTY-L）， high-dose Zhuangtongyin group（ZTY-H）， with 5 mice in each group. The MCAO group was modelled by silica gel embolization， the middle cerebral artery of mice was embolized for 1h， then the silica gel was pulled out and reperfusion was performed after 72 h； and the other operations in the Sham group were the same as those in the MCAO group except that the thread plug was not inserted. The neural function of mice was evaluated by Zea-Longa method. TTC staining was used to evaluate the volume of cerebral infarction. The level of brain injury was evaluated by HE staining and Nissl staining. Prussian blue staining and the expression of iron transport-related carrier receptors TfR1 and DMT1 on mRNA level was detected by qPCR to evaluate the iron ion deposition level in mice brain. The expression of lipid peroxidation-related gene ACSL4 on mRNA level was detected by qPCR， and the content of 4-HNE was detected by ELISA kit to evaluate the lipid peroxidation level of mice brain. The expressions of ferroptosis marker PTGS2 mRNA level was detected by qPCR. The expressions of Nrf2， SCL7A11/xCT， Gpx4 in mice brain tissue were detected by Western-blot and immunofluorescence. ResultsZhuangtongyin improved the nerve function of mice after MCAO （P＜0.05） and the cerebral infarction volume of mice （P＜0.05） and alleviate the pathological injury of cerebral cortex cells after MCAO operation. Zhuangtongyin attenuated the accumulation of trivalent iron ions in the brain tissue of mice following MCAO. Additionally， Zhuangtongyin downregulated the expression of TfR1 and DMT1 mRNA （P＜0.001）， a transporter associated with cellular iron ion uptake， in the brains of post-MCAO mice. Furthermore， Zhuangtongyin reduced levels of lipid peroxidation product 4-HNE （P＜0.001） and suppressed ACSL4 mRNA expression in brain tissue post-MCAO （P＜0.001）. Besides， Zhuangtongyin downregulated the expression of PTGS2 mRNA （P＜0.001）， in the brains of post-MCAO mice. Zhuangtongyin increased the expression of nrf2 into the nucleus （P＜0.001）， and increased the expression of xCT and Gpx4 in neurons after MCAO （P＜0.001）. ConclusionZhuangtongyin can enhance the nerve function and reduce cerebral infarction volume in MCAO/R mice， alleviate the pathological damage of cerebral cortex cells， and modulate the expression of key signaling molecules in the Nrf2-SCL7A11/xCT-Gpx4 pathway. Therefore， it is suggested that the mechanism by which Zhuangtongyin improves MCAO/R injury in mice may involve regulating ferroptosis through the Nrf2-SCL7A11/xCT-GPX4 pathway.