Objective To explore the correlation between change of blood lipid and MSCT perfusion imaging in steroid-induced femoral head necrosis in adult rabbits.Methods 20 rabbits 1~1.5 years old in age were divided into two group:16 rabbits in experimental group,8 mg/kg Methylprednisolone was injected twice a week;4 rabbits were used as control group.At 2,4,6,8 week after injection,4 rabbits in experimental group and 1 rabbit in contral group were killed respectively.Before killing the rabbits,the blood lipid was examined and MSCT perfusion imaging was done and the correlation between them was analysed.The index of TRIG,CHOL,Perfusion,PEI,TTP,MTT.All femoral heads were undergone pathological investigation.Results Two weeks after injection,blood lipid began increasing,then blood flow of femoral head decreasing obviously with prolongation of injection;PEI and MTT decrease only 4 weeks after injection.There were a negaitive correlation between blood lipid and blood flow of femoral head.Conclusion There were obviously correlation between the level of increasing blood lipid and blood flow decreasing in steroid-induced avascular necrosis of femoral head in rabbit.

Adult ; Aged ; Aged, 80 and over ; Coal Mining ; Humans ; Lung Neoplasms ; complications ; microbiology ; Male ; Methicillin Resistance ; Microbial Sensitivity Tests ; Middle Aged ; Pneumoconiosis ; complications ; microbiology ; Staphylococcus aureus ; drug effects ; isolation & purification

The purpose of this study is to explore the feasibility of wheat germ agglutinin (WGA) modified liposome as a vehicle for ophthalmic administration. Liposome loaded with 5-carboxyfluorescein (FAM) was prepared by lipid film hydration method. WGA was thiolated and then conjugated to the surface of the liposome via polyethylene glycol linker to constitute the WGA-modified and FAM-loaded liposome (WGA-LS/FAM). The amount of thiol groups on each WGA molecule was determined, and the bioactivity of WGA was estimated after it was modified to the surface of liposome. The physical and chemical features of the WGA-modified liposome were characterized and the ocular bioadhesive performance was evaluated in rats. The result showed that each thiolated WGA molecule was conjugated with 1.32 thiol groups. WGA-LS/FAM had a mean size of (97.40 +/- 1.39) nm, with a polydispersity index of 0.23 +/- 0.01. The entrapment efficacy of FAM was about (2.95 +/- 0.21)%, and only 4% of FAM leaked out of the liposome in 24 h. Erythrocyte agglutination test indicated that after modification WGA preserved the binding activity to glycoprotein. The in vivo ocular elimination of WGA-LS/FAM fitted first-order kinetics, and the elimination rate was significantly slower than that of the unmodified liposome, demonstrating WGA-modified liposome is bioadhesive and suitable for ophthalmic administration.
Absorption, Physicochemical ; Adhesiveness ; Administration, Ophthalmic ; Animals ; Drug Carriers ; Eye ; metabolism ; Fluoresceins ; chemistry ; Liposomes ; administration & dosage ; chemistry ; pharmacokinetics ; Male ; Particle Size ; Polyethylene Glycols ; chemistry ; Rats ; Rats, Sprague-Dawley ; Wheat Germ Agglutinins ; administration & dosage ; chemistry ; pharmacokinetics

Four screening methods, colorimetric assay, blood-plate hemolysis method, surface tension activ- ity and oil spreading technique were introduced to isolate strains producing bio-demulsifiers from 6 different bacteria source samples. The results of various screening methods were evaluated in this paper. Seventeen demulsifying strains were obtained, which are qualified in demulsification test of kerosene model emulsions. Among them, 5 strains showed high demulsifying ability, achieving 70% plus demulsifying ratio within 24 hours. Petroleum-contaminated soil, excess sludge from biological process treating oilfield produced water and sludge from municipal wastewater treatment plant were the best among all tested sources. Due to the determination limit, the colorimetric assay and blood-plate hemolysis method are not competent to screen bio-demulsifiers strains. The measurement of surface tension and oil spreading method were easy but accu- rate methods to isolate bio-demulsifiers strains. Although demulsification test of model emulsion is an effec- tive technique to target strains with the capability of breaking emulsions, it is sophisticated and time-con- suming. Thus it is recommended to use surface tension and oil spreading methods in pre-screening and vali- date the results in demulsification test with kerosene model emulsions.

Objective: To observe the clinical efficacy of filiform fire-needling plus continuous passive motion (CPM) therapy for frozen shoulder. Methods: A total of 72 patients were randomized into an observation group and a control group by the random number table method, with 36 cases in each group. Patients in the control group received celecoxib capsule plus CPM, while those in the observation group received filiform fire-needling plus CPM. The whole course of treatment lasted for 2 weeks in both groups. The visual analog scale (VAS), Constant-Murley score (CMS) and range of motion of shoulder joint were measured for therapeutic efficacy evaluation. Results: The total effective rate was 91.7％ in the observation group, higher than 72.2％ in the control group, and the between-group comparison showed statistical significance (P<0.05). After treatment, the VAS scores in the two groups dropped significantly, the CMS as well as the range of motion including abduction, forward flexion and extension were all increased significantly, and the intra-group comparisons showed statistical significance (all P<0.05). The betweengroup comparisons showed the improvements in these items in the observation group were more significant than those in the control group (all P<0.05). Conclusion: Filiform fire-needling plus CPM can produce more significant efficacy than celecoxib capsule plus CPM for frozen shoulder; it can alleviate pain, improve shoulder function and restore joint range of motion in such patients.

Objective To evaluate the possible mechanism of traumatic brain injury (TB1) affecting the speed of bone fracture healing.Method TBI combined with unilateral tibial fracture (group A) was used to build multiple injury model and simple unilateral tibial fracture (group B),and the FOS,JUN,bFGF,and VEGF protein expression in different time points between the two groups were compared,and roentgenogram was used for the evaluation of bone healing.Results The expression of FOS,JUN,bFGF,and VEGF protein of the cerebral tissue was low in the normal rats,but was slightly enhanced in group B.There was consistence of development for FOS and JUN expression in the brain tissue in group A,reaching peak at post-TBI 3 hours,and then reducing to control level after 12 hours.The bFGF and VEGF reached peak at post-TBI 12 hours and 24 hours and reduced to control level after 72 hours,respectively.In group A and group B,an increase in the FOS,JUN protein expression around the fracture site was observed at 3 hours after injury,which reached the peak at 6 hours,and reduced to the control level after 24 hours;the comparison between group A,group B and the control group at 3 hours,6 hours and 12 hours had significant difference (P

OBJECTIVETo investigate the effect of different permeation enhancer on transdermal permeation of anemonin through human skin.

METHODThe permeation experiments were performed using human skin on modified Franz diffusion cells in vitro. The concentrations of anemonin in receptor compartment at specified time points were determined by HPLC. The steady flux and the cumulative quantity of anemonin through skin were calculated.

RESULTThe flux of anemonin permeating through human skin from 30% ethanol, 50% ethanol solution and a combination of 3% laurocapm -5% polysorbate 20 and 30% ethanol -3 % laurocapm -5% polysorbate 20 of anemonin was (9.30 +/- 0.32), (18.56+/-0.58), (7.29+/-0.35), (13.77+/-0. 16) microg x cm(-2) x h(-1) and 7.9, 15.9, 6.2, 11.8 times higher than from saturated water solution respectively.

CONCLUSIONEthanol and laurocapm can remarkably improve the transdermal permeation of anemonin and the anemonin have the potential to be developed to new transdermal preparation.

Administration, Cutaneous ; Azepines ; pharmacology ; Clematis ; chemistry ; Ethanol ; pharmacology ; Furans ; administration & dosage ; isolation & purification ; pharmacokinetics ; Humans ; In Vitro Techniques ; Permeability ; drug effects ; Plants, Medicinal ; chemistry ; Skin ; drug effects ; metabolism ; Skin Absorption ; drug effects

Objective To evaluate the stability and biodistribution of a novel SPECT-MRI bi-functional agem 99Tcm-Gd-DTPA-DG in tumor-bearing nude mice. Methods DTPA-DG was synthesized and then conjugated with Gd2O3 to generate Gd-DTPA-DG. The tumor-bearing nude mice were scanned by MRI to evaluate the tumor targeting ability of Gd-DTPA-DG. The orthogonal experiment was applied to optimize pH value of reaction medium and reaction temperature. The radiolabeling efficiency was measured by thin layer chromatography. The distribution of 99Tcm-Gd-DTPA-DG in nude mice was evaluated by scintigrapy in vivo. The % ID/g was measured at different time after intravenous injection of 99Tcm-Gd-DTPA-DG. Results The tumor was significantly enhanced by Gd-DTPA-DG with MRI. The radiochemical purity of 99Tcm-Gd-DTPADG was about 98.5% and remained 96.2% at room temperature for 6 h. The tumor was well visualized by 99TcmGd-DTPA-DG SPECT at 2 h after injection. The tumor uptake was (1.48 ±0.12) %ID/g, and the rumor to muscle radioactivity ratio was 2.91. Conclusions MRI contrast of Gd-DTPA-DG may enhance tumor detection. 99Tcm-labeled Gd-DTPA-DG may be useful for tumor imaging and might have a potential role as a SPECT-MRI bi-functional agent.

Aim To clone apoptosis-related genes from human MCF-7 breast cancer cells and to analyze the character of the method used in the process. Methods A poptotic cell model of MCF-7 cells was established with the apoptotic tumor cells induced by the all-trans-retinoic acid. The apoptotic gene was cloned from the model by improved PCR-based subtractive hybridization. Results 5 clones were identified to be related to apoptosis by reverse dot blot, 4 of them were known genes, and 3 were related to apoptosis. A novel gene， named apmcf-1, coded for 47 amino acid was identified. This gene was accepted by Genbank, the accession number was AF141882. Conclusion This improved PCR-based subtractive hybridization may be an efficient way in cloning differential expression gene.

·AIM: To investigate the preparation of endostatin protein and its biologic activity on vascular endothelial cell.· METHODS: pBlast-hEndostatin and pBlast-Mcs were identified by digesting with Nhe Ⅰ and Sal Ⅰ, by PCR reaction, by sequencing, and by Alignments of PCR products with gene bank using NCBIBLAST software. The identified pBlast-hEndostatin as well as pBlast-Mcs were then purified with QIAGEN Endofree plasmid maxi kit.The purified plasmids transfected human fibroblasts. The expression of endostatin was detected by RT-PCR, Westem-Blot and immunohistochemistry. The endostatin prorein produced by transfected fibroblasts was purified by ultrafiltration and affinity chromatography. The inhibitory action of endostatin on human umbilical vein endothelium was measured by MTT assay.· RESULTS: pBlast-hEndostatin was found to contain human endostatin gene. Endostatin protein was produced by transfected fibroblasts. The inhibitory ratio of 2.5,5,10,20,40,80mg/L endostatin on human umbilical vein endothelium for 48h were 8.5%,13.1%,27.7%,38.1%,56.7%,63.8% respectively. IC50 value was 34.5mg/L.No inhibition action was found on fibroblasts.·CONCLUSIONS: Endostatin protein can be produced by the transfected fibroblasts. The produced endostatin has inhibitory action on human umbilical vein endothelium and has no inhibition action on fibroblasts.