BACKGROUND: Temperature-responsive magnetic pluronic nanoparticles possess the capacity of drug release controlled by body temperature and can penetrate blood brain barrier.OBJECTIVE: To detect the capacity of magnetic pluronic nanoparticles to carrying ganglioside-1(GM-1) and its capacity of drug release in vivo, as well as its effects on repair of spinal cord injury.DESIGN, TIME AND SETTING: A randomized, controlled, animal experiment was performed at the key laboratories of Beijing Institute for Neuroscience, Capital Medical University and Institute of Process Engineering, Chinese Academy of Sciences between June 2006 and February 2007.MATERIALS: GM-1 loaded magnetic pluronic nanoparticles were prepared by Laboratory of Separation Science and Engineering State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences. GM-1 was provided by Trb Pharma S.A of Argentina.METHODS: Twenty Sprague-Dawiey rats were developed into acute complete spinal cord injury models and were then evenly MAIN OUTCOME MEASURES: Behavior evaluation and quantitative analysis (nerve fibers and glial cells) at 4 weeks post-surgery.were significantly greater in the treatment group than in the remaining 3 groups (P < 0.05), the control groups exhibited greater numbers of nerve fibers than the sham-operation groups, and the control group 2 had higher levels compared with the control compared with the remaining 3 groups (P < 0.05). In the rostral areas, the control groups exhibited higher area ratio of glial cells than the sham-operation group (P < 0.05), and in the caudal areas, control group 2 displayed higher levels compared with the sham-operation group (P < 0.05).CONCLUSION: Magnetic pluronic nanoparticles possess drug-carrying and drug-releasing capacities. GM-1 loaded magnetic pluronic nanoparticies can repair spinal cord injury and promote nerve regeneration.

Objective To observe the effect of nimodipine combined with nimodipine on cerebral vascular dementia after cerebral infarction.MethodsFrom February 2009 to March 2012, 32 patients with vascular dementia after cerebral infarction were selected in Beijing Chaoyang hospital.Among them, there were 19 males and 13 females, aged 63~84 years old.The patients were randomly divided into two groups, each group of 16 patients.The patients in the treatment group were treated with oral nimodipine combined with Piracetam Tablets.ResultsThe effective rate of the treatment group was 93.8%, the adverse reaction rate was 6.3%, while the control group was effective, the adverse reaction rate was 18.8%, the difference between the two groups was significant (P<0.05).ConclusionIn the treatment of patients with vascular dementia after cerebral infarction, the use of nimodipine combined with nimodipine has significant curative effect and less adverse reaction rate, which is worthy of clinical application.

Objective To observe the clinical efficacy of treatment of subarachnoid hemorrhage with Danshen solution combine nimodipine.Methods80 cases diagnosis with subarachnoid hemorrhage from January 2014 to February 2015, were randomly divided into observation group and control group 40cases, observation group were plus conventional therapy Danshen solution treatment, the control group were given nimodipine only conventional treatment, recorded and analyzed before and after treatment S-100B protein in cerebrospinal fluid situation, status and treatment of disease incidence of complications in patients with two groups of patients.ResultsTreatment 5d, 7d, 14d after S-100B protein were observed in patients (0.788±0.014)μg/L,(0.625±0.15)μg/L,(0.501±0.13)μg/L, were better than the control group (0.957±0.16)μg/L,(0.823±0.17)μg/L,(0.711±0.12)μg/L, and the differences were statistically significant (P<0.05).Treatment observation group total effective rate of 90.0%, higher than 67.5%, and the difference was significant (P<0.05).The treatment group rebleeding, cerebral ischemia, hydrocephalus and other complications with the control group fairly, the difference was not significant.ConclusionIt is effective for the treatment of subarachnoid hemorrhage withdanshen solution combine nimodipine, can significantly improve the cure rate in patients with subarachnoid hemorrhage, reducing mortality.It is worthy of further research and applications.

Objective To investigate the safety and feasibility of early intervention treatment for aneurysmal subarachnoid hemorrhage in the elderly. Methods Within 6 to 72 hours after hemorrhage,89 aneurysms were detected by overall brain angiogram in 84 elderly patients(aged above 60 years)Who were diagnosed as subarachnoid hemorrhage on CT.HUNT-HESS grade was as following:26 cases of grade Ⅱ,31 cases of grade Ⅲ,25 cases of grade Ⅳ,2 cases of grade Ⅴ.Interventional embolization treatment was performed immediately.Aceording to the structure of the aneurysm,pure coil embolization,balloon assisted technique and combined with stent technique were performed.Anhydration,fluid expansion,vessel dilatation,lumbar puncture and/or lumbar drainage were performed after procedure.At the same time,the complications were treated. Results Eighty-three aneurysms were embolized successfully in 89 patients.The Success rate of the technique was 93.3%.The Glasgow Outcome Seale(GOS)score at 3 months post procedure showed a good result in 68 patients.medium disability in 7 patients,severe disability in 4 patients,death in 5 patients (1 case was related to the technique). Conclusions Interventional embolization iS a safe and effective therapeutic approach in elderly patients with subarachnoid hemorrhage.

Objective To explore the microsurgical method in treating ruptured aneurysms treatment and evaluating the treatment of the complication during or after the operation.Methods 36 cases of patients with intracranial aneurysm were analyzed retrospectively.All of the patients were subarachnoid hemorrhage (SAH) by CT scan on admission.The intracranial aneurysms were confirmed in 35 cases by DSA examination and A2 aneurysm was confirmed by explorative operation in 1 case.The microsurgical treatment was performed in 36 cases at the early or intermediate stage,22 cases were treated in the early stage,the other 14 cases were treated in the intermediate stage (early stage means within 3 days post SAH;intermediate stage means from 4 days to 10 days post SAH).Results After the operation,21 cases were GOS grade Ⅰ,4 cases were COS grade Ⅱ,4 cases were COS grade Ⅲ,4 cases were GOS grade Ⅳ.Of all the patients,CT scan was done after the operation,finding no intracranial bemorrhage,and cerebral infarction was disclosed in 5 cases.3 cases were dead,one suffered occipital lobe infaret after the PCoA aneurysm clipped,brain hernia occurred at last,one's Hunt Hess grade was Ⅴ,ACoA aneurysm was disclosed by DSA examination,severe brain edema occurred after the operation,the other suffered tonsillar hernia one week after the aneurysm clipping,which ruptured after endovascular treatment of ACoA aneurysm 2 years later.DSA examinations were done in 26 cases after operation,declaring 1 ACoA aneurysm was unclipped,1 PCoA aneurysm was incompletely clipped,and 1 PCoA was sacrificed.Conclusions It is a valuable method to clip the ruptured intracranial aneurysms in early and intermediate stage.The cerebral ischemia is the severe complication after clipping.Especially for the PCoA aneurysms,it is very important to protect the PCoA.Further research should be done for the treatment in the case with mother artery arteriosclerosis and thrombosis within the aneurysms.