BACKGROUND: Previous studies have indicated that hyperhomocysteinemia can induce atherosclerosis by enhancing oxidative stress, whereas Ginkgo biloba extract (GbE) can scavenge oxygen-derived free radicals.OBJECTIVE: To observe the role of reactive oxygen species (ROS) and nuclear factor-kappa B (NF-κB) in the expression of cell adhesion molecules (CAMs) induced by homocysteine (Hcy), and investigate the effect of GbE.DESIGN: A randomized controlled animal trial.SETTING: Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology.MATERrALS: Twenty-four healthy male rabbits of 6 months old. Dl-methionine (Sigma Chemical, Co.,Ltd.); GbE (Guizhou Yibai Pharmaceutical Company; powder).METHODS: The experiment was accomplished in the Laboratory of Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology from March 2003 to April 2004. ① After adaptive feeding for 2 weeks, the rabbits were randomly divided into three groups: Model group (n =12): The rabbits were treated with subcutaneous injection of dl-methionine (80 mg/kg per day); GbE group (n =8): The rabbits were administrated with GbE (mixed with feed, 50 m/kg per day) at 1 hour before the subcutaneous injection of dl-methionine; Control group (n=4): The rabbits were injected with equivalent sodium chloride. They were administrated for 7 weeks continuously. ②Histological changes were observed under light and electron microscopes: ROS level was determined with colorimetries (721 visible spectrophotometer); The expressions of CAMs and NF-κB in endothelial cells were detected with immunohistochemical methods; The concentration of plasma Hcy was measured with high-performance liquid chromatography.MAIN OUTCOME MEASURES: Histological changes, ROS level and expressions of CAMs and NF-κB in endothelial cells.RESULTS: All the 24 rabbits were involved in the analysis of results. ① ROS level: After administration, the ROS level in the model group was obviously increased (2.92±0.20,2.48±0.26, P ＜ 0.05), whereas those in the GbE group and control group (2.41±0.23, 2.43±0.20) had no obvious differences as compared with those before administration (2.31±0.27,2.47±0.32, P ＞ 0.05). ② Histological changes: Aortas of rabbits in the model group presented initial changes of atherosclerosis, including shedding or necrosis of endothelial cells and nuclear pyknosis or standing in a clutter of smooth muscle cells. There were scarcely any changes in the GbE group and control group. ③ Expressions of CAMs and NF-κB in endothelial cells: After treatments, the expressions of vascular cell adhesion molecule-1 (VCAM-1), intercellular adhesion molecule-1 (ICAM-1) and NF-κB in the model group were obviously higher than those in the control group (P ＜0.05), and there were no significant differences between the GbE group and control group (P ＞ 0.05). ④ Concentration of plasma Hcy: After 7 weeks, the concentration of plasma Hcy was higher in the model group and GbE group than in the control group [(25.01±6.80), (26.71±2.36), (16.85± 1.64) μmol/L, P ＜ 0.05].CONCLUSION: Hcy-induced oxidative stress plays an important role in NF-κB activation. GbE might suppress the activation of NF-κB and expression of CAMs by reducing ROS.

Objective:To study the change of the expression of heat shock protein 70 and ultrastructure of brain in sleep deprivation(SD).Methods:44 male Sprague-Dawlay rats were randomly divided into 11 groups.The HSP70 positive cells were detected by using immunohistochemical methods.The ultrastructure of hippocampal neuron was observed through electromicroscope.Results:HSP70 were detected in the cerebral cortex and hippocampus after SD.The HSP70 could be found after 12 h SD,reached to a peak during 2-3 d SD,and declined after 7 d SD.The number of HSP70 positive cells of SDd12h group was markedly more than that of SDn12h group(P

Objective: To observe the relationship between homocysteine(Hcy)and spatial cognitive ability and to evaluate whether vitamin B12 supplementation could protect spatial cognitive ability in rats. Methods: The rats were randomized into three groups. The experimental group was given methionine subcutaneously. The intervention group was given methionine and vitamin B12 subcutaneously. The control group received isometric normal saline. After being raised for 8 weeks, all rats were examined for plasma Hcy and serum vitamin B12 and scores of Y-maze test. The brain tissues of hippocampus were checked immunohistochemically for acetylcholinesterase (AChE). Results: The experimental group developed hyperhomocysteinemia and descreased spatial cognitive ability significantly (P0.05). Conclusion: Homocysteine can impair the spatial cognitive ability in rats and vitamin B12 is effective in lowering Hcy level and protect the spatial cognitive ability of rats.

Survivin is a protein that inhibits apoptosis and regulates cell division.The cDNA sequence of survivin was amplified by RT-PCR and sub-cloned into the prokaryotic expression vector pET-21b(+),followed by transformation into E.coli strain BL21(DE3) and induction with IPTG.The recombinant survivin protein fusing with 6?His tag was expressed in E.coli in the form of inclusion body at the expression level over 60% of the total cell protein.Results of Western blotting showed that recombinant survivin reacted specifically with anti-human survivin antibody.After gel filtration,the recombinant protein reached the purity over 95%,which facilitate the study of diagnosing and inhibitor agents targeting survivin.

Animals ; Drugs, Chinese Herbal ; pharmacology ; Glucosides ; metabolism ; Humans ; Infertility ; chemically induced ; Models, Animal ; Tripterygium ; metabolism

Acetabular is an important human joint for weight bearing. Quadrilateral plate is a crucial structure of medial acetabulum with special morphology and important function. Quadrilateral plate fractures are common fracture in acetabulum. Quadrilateral plate fracture is hard to expose and reduction because it is in the medial of acetabulum. At the same time,the bone in the quadrilateral plate is not easy to fixed for thinning bones and adjacent to the articular cavity. The operator should know well about the anatomy and choose the suitable internal fixation. After quadrilateral plate fractures, the femur head maybe displace medially even break into pelvis. That make reduction and treatment always be a challenge. With different kinds of fractures,the efficacy of treatment is not the same. This paper intend to review the relation of anatomic features,approaches, internal fixations, key point of treatment and efficacy.
Acetabulum ; injuries ; surgery ; Animals ; Fracture Fixation, Internal ; instrumentation ; methods ; trends ; Fractures, Bone ; surgery ; Humans

Six bacterial strains with malachite green decolorization ability were isolated from a sediment of aquaculture pond, and strain M6 was selected by further enrichment culture in nutrition broth with malachite green and decolorization rate comparison. The decolorization rate of strain M6 to malachite green was 97.14% in the conditon of 30?C and 150 r/min, and its morphology was observed by gram stain and electronmicroscopy, its physiological and biochemical characteristic was studied by ATB bacteria identification in-strument for identification of bacteria, and its 16S rDNA sequence was determined following PCR amplifi-cation, the sequence was aligned and the phylogenic tree was instructed with those bacterial strains of high identity with strain M6. In addition, its growth characteristics was also studied. The experimental results showed that strain M6 was gram negative and bacilliform with a flagellum at one end. Its size was 0.45 ?m ?0.84 ?m. Its colony produced on common agar plate appeared as round, light blue, dense, hard to choose; 16S rDNA sequence of strain M6 had high identity of 98%～99% with Pseudomonas sp. located in GenBank and strain M6 had the most close relative relation to Pseudomonas putida OW-16 (Locus number: DQ112328.1). Combined the results of the traditional morphological, physiological, biochemical character-istics and 16S rDNA sequence analysis, strain M6 was identified as Pseudomonas putida (Locus number: EU348741.1). Additionally, its growth curve in the condition of 30?C and 150 r/min was as follows: lag phase was 0～4 h, log phase was 4 h～64 h, stationary phase was 64 h～80 h, decline phase was after 80 h. Its best growth conditions were pH 7 and 30?C,and in the rotational speed of 50 r/min to 250 r/min. Its concen-tration increased with the increase in rotational speed.

Objective To study the effect of salmon calcitonin and physical therapy on lumbar spinal ste- nosis.Methods Eighty cases of lumbar spinal stenosis were divided into treatment and control groups.Physical therapy alone was given to the control group,but salmon calcitonin was injected intramuscularly in addition to phys- ical therapy for the patients in the treatment group.Visual analogue scale,range of motion (ROM),pain-free walking distance,tendon reflexes and functional independence measures (FIM) were observed to assess the re- sults.Results The VAS,ROM and walking distance of the treatment group improved more than those of the con- trol group,but the groups' tendon reflexes and FIM were similar.Conclusions Salmon caleitonin can reduce the symptoms of lumbar spinal stenosis,and it has special effects in relieving pain.

ObjectiveTo explore the diagnostic methods and surgery pattern at the first time of spontaneous perforation of congenital choledochal cyst.MethodsEleven cases(4 male,7 female) with spontaneous perforation of congenital choledochal cyst were 6 months to 5 years old,and their average course of disease were 4 days.Gustily abdominal distension,abdominal pain,crying and fever were present in all cases.Jaundice(7 cases) and emesis(5 cases) appeared.All cases were detected with physical sign of peritonitis by physical examination.Choledochal cysts were confirmed by CT or B ultrasound in 8 cases.All cases accepted abdominal paracentesis and biliary ascites was drawn.Three different operative procedures were performed:choledochocyst excision & Roux-Y choledocho-jejunostomy(2 cases),choledochotomy with T-tube drainage(3 cases),and cholecystostomy(6 cases).Nine children receiving external drainage operation accepted a second operation to rebuild biliary tract(choledochocyst excision & Roux-Y choledochoje-junostomy) after 3 to 6 months.ResultsAll cases had got satisfactory therapeutic efficacy without any grave complication such as fistula of anastomotic stoma,infection of biliary tract or obstruction of biliary tract.During operation,perforations were located in the juncture of choledochus and cystic duct in 5 children and were not found in the other 6 children.In the second operation,the cases receiving cholecystostomy had less peritoneal adhesion,anatomic structure changes,haemorrhage[(30-50) mL vs(100-200) mL] and operation time[(2.5-3.0) h vs(3.5-5.0) h] than those receiving choledochotomy with T-tube drainage,and did not appear inadequate drainage for cystic duct obstruction.ConclusionsFor children with more organ inflammatory edema and adherence and in a bad overall condition,the first-time operation of cholecystostomy is more reasonable.

Objective To improve the knowledge,diagnostic level on concealed penis in children,and explore the operative treatment methods of concealed penis.Methods Ten children with concealed penis were reviewed retrospectively in the First Hospital of Jilin University from Jun.2005 to Jul.2007.Patients were 6-12 years old.Penis length was 1.2-2.6 cm.Patients growthing and micturition were normal,the results of androgne and estrogen examination were normal.The etiology was simple obesity in one case,fiber streak of penis sarcolemma in 9 cases.The clinical symptoms and signs,diagnosis and operative method were analyzed.Results The diagnosis of 10 children were correct,and all patients were treated by Devine's operation and 10 cases patients had healed in one stage.There was no vessel,nerve and urethra injury during the operation.The length of penis was 3.0-5.5 cm,average in 3.6 cm after operation.Followed up 3 months to 2 years,10 children's phimosis were removed,the micturition were normal;the appearance of penis was also satisfactory after operation.One patient with under-developed penis had a amelioration after treatment with HCG postoperatively.The penis contour was dissatisfactory in 1 obesity patient,but it was ameliorated gradually while growing up.Conclusions The correct diagnosis and differential diagnosis are very important for operative treatment depend on the different etiology and pathologic changes of concealed penis.Suitable operation can extend the length;moreover,ameliorate the symptom of micturition and the appearance of the penis.