Objective To observe the clinical outcomes of modified posteromedial and posterolateral approaches for the treatment of posterior tibial plateau fractures.Methods Between January 2006 and October 2011,25 patients with posterior tibial plateau fracture were identified.They were 17 men and 8 women,aged from 22 to 76 years (average,46.4 years).According to the AO/OTA classification,there were 4 cases of type 41-B1,6 cases of type 41-B2 and 15 cases of type 41-B3.According to Luo's three-column classification,they were all posterior column fractures.Ten patients with posterolateral tibial plateau fracture were treated by the modified posterolateral approach and the other 15 patients with posteromedial tibial plateau fracture by the modified posteromedial approach.The posterior fractures were fixated with a buttress plate.The knee function was evaluated at the last follow-up by the The Hospital for Special Surgery (HSS) Score.Results All the 25 cases were followed up for a mean time of 13.2 months (from 10 to 24 months).By the radiological Rasmussen criteria for fracture reduction,the mean score immediately after surgery was 16.5 points (from 13 to 18 points),with 20 excellent cases,4 good cases and one fair case.All patients were pain-free with full range of motion.Radiologically,bone union was achieved in all cases after a mean time of 13.9 weeks (from 12 to 18 weeks).No surgery-related complications were found.The mean HSS score was 91 points(range,74 to 97 points) and the good to excellent rate was 100％ (17 excellent and 8 good cases) at the last follow-up.The average range of knee motion ranged from 0° to 125°.Conclusion In the treatment of posterior tibial plateau fractures,because the modified posteromedial and posterolateral approaches can result in excellent fracture reduction under direct visualization and allow for posterior buttress plating,soft tissues can be well preserved and good functional results can be expected.

Objective: To investigate the effects of neferine ( Nef ) on the learning and memory function and the expression of Notch1 and SYN in hippocampus in the rats with chronic cerebral ischemia .Methods:Male SD rats (250-300g) were randomly divid-ed into the sham operation group(Sham), the model group(Mod), nimodipine (Nim) positive control group and Nef treatment group with 5 ones in each .The chronic cerebral ischemia ( CCI ) model was established using bilateral common carotid artery ligation ( 2-VO).The rats were orally administered with NS(5 mg· kg-1),Nim(1 mg· kg -1) and Nef (20 mg· kg-1),respectively for 21 days after the first day of operation .The body weight was recorded .The number of hippocampal neurons in the rats was observed by Nissel staining.The learning and memory function was evaluated by Morris water maze test .Notch1 and SYN protein expressions in hippo-campus were detected by IHC staining and Western blot .Results:Compared with the Mod group , Nef group could reverse the reduc-tion of body weight and the number of hippocampal neurons in hippocampus CA 1 region induced by 2-VO, increase the route and the time of platform finding, prolong the escape latency and decrease the number of platform cross on the 21st day, and the effects were bet-ter than those of Nim (P<0.05).Moreover, the down-regulated SYN and Notch1 protein expressions in CCI group were both increase after the Nef treatment on the 21st day.Conclusion:Nef has a protective effect on the function of learning and memory in CCI rats in-duced by 2-VO,which may be related with the strengthened Notch 1 pathway in CA1 region of hippocampus and synaptic plasticity .

OBJECTIVE:To establish a method for the determination of 4 kinds of residual solvents in racemic ketoisoleucine calcium. METHODS:Headspace gas chromatography was performed on the column of DB-624 capillary column by temperature programmed,detector was FID,inlet temperature was 200 ℃,detector temperature was 250 ℃,carrier gas was nitrogen,flow rate was 1.0 ml/min,injection volume was 1 ml by headspace sampling,equilibrium temperature was 70 ℃ and equilibrium time was 30 min. RESULTS:The linear range was 120.04-480.16 μg/ml for methanol (r=0.997 8),200.21-800.83 μg/ml for ethanol (r=0.998 5),204.05-816.19 μg/ml for ethyl acetate(r=0.999 2),28.35-113.39 μg/ml for tetrahydrofuran(r=0.998 9);detection limits were 6.002 μg/ml,50.05 μg/ml,51.01 μg/ml and 7.087 μg/ml;RSD of precision was lower than 3%;recoveries were 95.0%-105.6%(RSD=3.95%,n=9),97.5%-106.4%(RSD=3.67%,n=9),98.1%-105.9%(RSD=3.16%,n=9)and 88.8%-99.2%(RSD=3.79%,n=9),respectively;4 kinds of residual solvents were not detected. CONCLUSIONS:The method is simple,accu-rate and reliable,and can be used for the determination of residual solvents in racemic ketoisoleucine calcium.

Anniversaries and Special Events ; China ; Humans ; Public Health ; Security Measures ; Sports

Objective To investigate the effect of nerve growth factor (NGF) on the bone induction of recombinant human bone morphogenetic protein-2 (rhBMP-2) through local application of NGF in the osteoinductive process of BMP. Methods Thirty-six ICR mice were divided into the experimental group and control group at random, and rhBMP-2/collagen composite was implanted into the right thigh muscle pouch of each group. NGF or vehicle was daily injected into the implanted sites of BMP, respectively, for 7 days starting from the third day after surgery. At d10, d20 and d30 after implantation, new bone formation was measured radiographically, biochemically and histologically to compare the osteogenetic capacity of the two groups. Results In both groups, new bone formation was found at d10. However, there was significantly more new bone in the experimental group according to histological and radiographic examinations. At d10 and d20, alkaline phosphatase activity of the local tissue in the experimental group was significantly greater than that in the control group, and calcium and phosphonium contents of samples were also greater in the experimental group. Arrangement of collagen fibers became more regular in the experimental group than that in the control group. Conclusion NGF possesses synergistic effect on ectopic bone formation induced by rhBMP-2.

Quantitative structure activity relationship ( QSAR ) study attempts to correlate chemical structure with activity using statistical approaches and is now being applied to high throughput toxicity screening and prediction of nanomaterials. This paper is interded to discuss the present QSAR study methods of nanomaterials based on traditional QSAR study, such as the use of measurement instrument and quantum chemistry methods of structure descriptor selection, evaluation criteria for the quality of published experimental data on nanomaterials, modeling methods such as K-nearest neighbor ( KNN) and support vector machine(SVM), validation methods such as leave-one-out(LOO) and leave-N-out ( LNO) . We also review the problems and challenges existing in this area and predict future development.

Retinal neovascularization is a complicated pathophysiological process as a result of imbalance between angiogenic and anti-angiogenic factors. Correct understanding of the signaling pathways,exploring the critical factors involved in retinal angiogenesis, looking for new strategies by reconstructing the new vessels are helpful for knowing the mechanism of the occurrence and development of reitnal neovascularization, which would be good for preventing and treating retinal neovascularization diseases.

Objective To observe the effect of cluster needling at scalp acupoints plus paraffin therapy on motor function in cerebral palsy patients.Method Forty eligible patients with spastic cerebral palsy were randomized into a control group and an experimental group, 20 cases in each group. The control group was intervened by cluster needling with long-time retaining of the needles plus Uyeda's approach and conventional rehabilitation trainings specifically for spastic cerebral palsy; the experimental group was intervened by paraffin therapy in addition to the treatment given to the control group. The interventions were conducted once a day, for a total of 8 weeks. The Gross Motor Function Measure-88 (GMFM-88) and Modified Ashworth Scale (MAS) were adopted to evaluate the motor function before and after the treatment.Result The GMFM-88 scores were significantly changed after the treatment in both groups (P<0.05), and there was a significant difference in comparing the GMFM-88 score between the two groups after the intervention (P<0.05). The MAS score was significantly changed after the intervention in the experimental group (P<0.05), while the score wasn't significantly changed in the control group (P>0.05); there was a significant difference in comparing the MAS score between the two groups after the intervention (P<0.05).Conclusion On the basis of conventional rehabilitation trainings, cluster needling at scalp acupoints plus paraffin therapy can produce a significant efficacy in improving the muscular tension and motor function, and benefit the development of cerebral palsy patients.

OBJECTIVE:To discuss the thoughts and methods for the formation of solid Chinese traditional medicine preparation.METHODS: The thoughts and methods for the formation of solid Chinese traditional medicine preparation were introduced and summarized.RESULTS & CONCLUSION: The design for the formation of solid Chinese traditional medicine preparation was an important part in the preparation process of Chinese materia medica preparations,which should be consummated in the future study so as to enhance the quality of the solid Chinese traditional medicine preparations and facilitate the modernization of traditional Chinese medicine.

OBJECTIVE:To study the general pattern and characteristics of adverse drug reactions (ADR) induced by cimetidine. METHODS: A total of 306 ADR cases induced by cimetidine reported by domestic journals of 1983～2007 were analyzed statistically. RESULTS: The clinical manifestations of ADR induced by cimetidine were complicated and various and characterized by lesions of central nervous system (27.78%), cardiovascular system (21.24%), endocrine disturbance (8.82%) and hematological system (8.82%) etc. CONCLUSION: Great importance should be attached to the ADR induced by cimetidine to guard against the serious ADR such as aplastic anemia, cardiac arrest and allergic shock.