OBJECTIVE:To develop the method for the determination of riluzole concentration in blood plasma.METH?ODS:Riluzole was extracted with diethyl ether.The residues were analyzed with a reverse phase HPLC system(Diamonsil TM C 18 column,250mm?4.6mm,5?m),with mobile phase of MeOH-0.03mol/L and NH 4 H 2 PO 4 (80∶20,V/V),UV detection wave length of265nm,flow rate of0.8ml/min.RESULTS:The linear coverage of Riluzole was5～1000ng/ml;the lowest detectable concentration was5ng/ml.The average recoveries of riluzole were99.51%,95.74%and97.12respectively.The within-day and between-day relative standard deviations were1.17%、6.48%(n=5)respectively.CONCLUSION:The met_ hod is sensitive,accurate,simple and reliable,and it can be applied to phamacokinetic studies.

Objective To study the mechanism of myocardical aging. Methods Wistar rats used were divided aging group (22 months old) and adult group (7 months old). Qualitative morphological changes of organelles of myocardium were observed by TEM. Quantitative morphological changes of organelles of myocardium were determined by stereological method, Ca 2+ regulation of organelles of myocardium were analysed by EDS. Results Compared with adult group, aging group:(1) The nuclei were indented, myofibril were arranged irregularly, intercalated disk were separated, mitochondria and sarcoplasmic reticulum were swelled, lipofuscin and residual body were increased. (2) The volume of myocardium not occupied by myocyte were increased, the volume density of mitochondria and sarcoplasmic reticulum were reduced, specific surface of outer membrance of mitochondria inter membrane plus cristae of mitochondria and the membrane of sarcoplasmic reticulum were also reduced. (3) Ca 2+ in myofibril and mitochondria were increased, but Ca 2+ in sarcoplasmic reticulum were decreased. Conclusion The contractility of aging myocardium were declined, the morphological changes and Ca 2+ regulation of mitochondria and sarcoplasmic reticulum might be directly related to myocardical aging.

Objective To study the effect of stanozolol and shenqi injection used in comprehensive treatment of late stage cancer.Methods 158 late stage cancer patients,all treated only by rountine method and supportive treatment were randomly divided into 2 groups.And at the same time,79 patients in the treatment group were treated with stanozolol,2mg,po,tid,and shenqi injection 250ml,ivdrip,qd for nine weeks.All patients were recorded weight and hematology biochemical indicator.Results The treatment group surpasses the control group obviously (P＜0.01 ).Conclusion Stanozolol and shenqi injection can improve quality of life of late stage cancer patients and reduce dyscrasia syndrome.

Objective To evaluate the long-term effect of surgical procedures for congenital choledochal cyst (CCC).Methods From 1986 to 2000, 120 cases of CCC were admitted and 73 of them underwent the primary operations in General Hospital of PLA. Three types procedures were performed,type I: external drainage of CCC in 7 cases; type II:cystojejunal Roux-en-Y anastomosis in 5 cases; type III: cyst excision with cystojejunal Roux-en-Y anastomosis or cystoduodenostomy in 57cases,and other procedures in 4 cases.Results 68 cases were followed-up for 6 months to 5 years (median 2.7 years). Three cases undergoing type I operations accepted reoperations;two cases undergoing type II operations accepted reoperations due to severe complications as cholongitis and hepatolithiasis; 57 cases treated by type III operation with the good results 88.7% and none reoperation.Conclusions External drainage is only a first-aid management on emergency basis. Internal drainage should never be done,because the effect is temporary,and severe complications result in reoperations. Cyst excision with biliary tract reconstruction is recommended as the optimal treatment of CCC.

OBJECTIVE: To discuss X-ray findings and clinical analysis of neonatal respiratory distress syndrome (NRDS), and to compare the use of pulmonary surfactant and mechanical ventilation. METHODS: The X-ray findings, clinical characteristics, and therapy analysis of 32 babies with NRDS were studied retrospectively from Jan. 2004 to Dec. 2006. The correlation between X-ray findings and clinical characteristics was analyzed. The advantages of surfactant replacement therapy, compared with mechanical ventilation alone were discussed. RESULTS: According to X-ray findings all babies were divided into Stage I (n=7), Stage II (n=11), Stage III (n=8), Stage IV (n=3), and normal (n=3). Of them, 18 were very low-birth-weight neonates, and 11 were very low-birth-weight neonates. Twenty received surfactant replacement therapy, after the diagnosis of NRDS had been established clinically and radiographically. NRDS had classic chest radiographic findings. There was statistically significant difference between the fetal age or birth weight and the first time X-findings (P<0.05), and difference existed between the use of surfactant and nCPAP alone (P<0.01). CONCLUSION The younger the fetal age and the lower the birth weight, the more likely that the first X-ray findings would be below Stage II. Early surfactant replacement therapy with extubation to nCPAP for infants with NRDS was not only safe and beneficial, but also it significantly reduced both the need for mechanical ventilation and the briefer requirement for respiratory supports.
Female ; Humans ; Infant, Newborn ; Infant, Premature ; Infant, Very Low Birth Weight ; Male ; Pulmonary Surfactants ; therapeutic use ; Radiography ; Respiration, Artificial ; Respiratory Distress Syndrome, Newborn ; diagnostic imaging ; therapy ; Retrospective Studies

Mother-to-child transmission (MTCT) of hepatitis B virus (HBV) represents the most common mode by which children acquire HBV infection. For pregnant women with high viral load and positive hepatitis B e antigen (HBeAg), antiviral therapy during late pregnancy combined with timely and standardized inoculation of neonatal hepatitis B immunoglobulin and hepatitis B vaccine can minimize the possibility of MTCT of HBV. This review focuses on using and withdrawing antiviral drugs during pregnancy, managing postpartum hepatitis, and breastfeeding issues to further optimize the combined immunization and antiviral treatment strategies and seek the optimal solution to preventing MTCT of HBV.

A DNA fragment encoding human interleukin 4 was obtained by PCR from pORF-hIL4 plasmid. The amplified fragment was inserted into prokaryotic expression vector PQE60 and recombinant protein was expressed in E. Coli M15 by adding isopropyl-beta-D-thiogalactoside (IPTG). The hIL-4 protein was present as insoluble inclusion bodies in the bacterial extract. After denaturation of inclusion bodies with 5 mol/L guanidine hydrochloride, the supernate was diluted to get renaturized. Then dialysis and Ni chelating chromatography were used for purification. TF-1 proliferation assay of recombinant human interleukin 4 was performed, and then rhIL-4 was fit to be used for proliferation of human dendritic cells from monocyte in vitro.
Escherichia coli ; genetics ; metabolism ; Genetic Vectors ; Humans ; Inclusion Bodies ; metabolism ; Interleukin-4 ; biosynthesis ; genetics ; Protein Folding ; Recombinant Proteins ; biosynthesis ; genetics ; isolation & purification

Objective To compare the clinical effects of percutaneous foramen rotundum and percutaneous foramen ovale radiofrequency thermocoagulation (PRT) on maxillary neuralgia.Methods Eighty patients with primary maxillary neuralgia were randomly divided into puncture foramen (group A) and foramen rotundum through pterygopalatine fossa (group B).Visual analogue scale (VAS) scores,puncture time,surgical side effects,and complications were recorded before surgery,one week,and one,3,6 and 12 months after operation.Recurrent rate and excellent and good results were calculated one week,and one,3,6 and 12 months after operation.Results The operation time of group A was significantly shorter than that of group B (P＜0.05),however,complications (involved V1 and V3 branches) of group A were significantly higher than those of group B (P＜0.05).VAS scores of two groups showed no significant differences at each time points (P＞0.05).Recurrence rate of group A 3,6 and 12 months after surgery was 5.1％(2/39),7.8％(3/39) and 15.4％(6/39),respectively,which showed no significant differences as compared with that of group B (2.8％[1/36],11.1％[4/36] and 11.1％[4/36],P＞ 0.05).Rate excellent and good results showed no significant differences between each two groups one week,and 3,6 and 12 months after operation (P＞0.05).Conclusion Percutaneous punctures of the foramen ovale and foramen rotundum approach radiofrequency therrnocoagulation for the treatment of maxillary neuralgia are safe and effective operation methods;surgical complications in foramen rotundum approach are less than those in the foramen ovale approach.

Objective:To analyze the changing trend of incidence and prevalence of pneumoconiosis globally, and provide scientific basis for the formulation of health policy.Methods:In June 2022, through the Global Health Data exchange (GHDx) query tool (http: //ghdx.healthdata.org/gbd-results-tool) , the pneumoconiosis incidence and prevalence data was downloaded and organized. Estimated annual percentage change (EAPC) and age-standardized rate (ASR) were used to estimate the trends of pneumoconiosis from 1990 to 2019. EAPC was estimated by linear regression model based on ASR.Results:The overall ASR of the incidence and prevalence of pneumoconiosis decreased from 1990 to 2019, and their EAPCs were-0.85% (95% CI: -1.11%--0.60%) and -0.78% (95% CI: -1.08%--0.49%) . Over the past 30 years, the incidence and prevalence of pneumoconiosis in all SDI areas showed decreasing trends, especially in high SDI areas, their EAPCs were -1.46% (95% CI: -1.76%--1.15%) and -1.99% (95% CI: -2.44%--1.53%) . 110 countries/areas showed increasing trends in age standardized incidence rate (ASIR) , with Iran and Georgia showing the most pronounced upward trend, their EAPCs were 5.32% (95% CI: 4.43%-6.22%) and 4.39% (95% CI: 3.81%-4.97%) . 125 countries/areas showed anincreasing trends in prevalence ASR, with Iran had the fastest rise in prevalence (EAPC=6.40%, 95% CI: 5.33%-7.49%) . Conclusion:Although decreasing trends in the burden of pneumoconiosis are observed globally from 1990 to 2019, but the burden of pneumoconiosis in low-and middle-income countries or regions are still heavy. We need more effective strategies to prevent and reduce the burden of pneumoconiosis.

Objective:To analyze the changing trend of incidence and prevalence of pneumoconiosis globally, and provide scientific basis for the formulation of health policy.Methods:In June 2022, through the Global Health Data exchange (GHDx) query tool (http: //ghdx.healthdata.org/gbd-results-tool) , the pneumoconiosis incidence and prevalence data was downloaded and organized. Estimated annual percentage change (EAPC) and age-standardized rate (ASR) were used to estimate the trends of pneumoconiosis from 1990 to 2019. EAPC was estimated by linear regression model based on ASR.Results:The overall ASR of the incidence and prevalence of pneumoconiosis decreased from 1990 to 2019, and their EAPCs were-0.85% (95% CI: -1.11%--0.60%) and -0.78% (95% CI: -1.08%--0.49%) . Over the past 30 years, the incidence and prevalence of pneumoconiosis in all SDI areas showed decreasing trends, especially in high SDI areas, their EAPCs were -1.46% (95% CI: -1.76%--1.15%) and -1.99% (95% CI: -2.44%--1.53%) . 110 countries/areas showed increasing trends in age standardized incidence rate (ASIR) , with Iran and Georgia showing the most pronounced upward trend, their EAPCs were 5.32% (95% CI: 4.43%-6.22%) and 4.39% (95% CI: 3.81%-4.97%) . 125 countries/areas showed anincreasing trends in prevalence ASR, with Iran had the fastest rise in prevalence (EAPC=6.40%, 95% CI: 5.33%-7.49%) . Conclusion:Although decreasing trends in the burden of pneumoconiosis are observed globally from 1990 to 2019, but the burden of pneumoconiosis in low-and middle-income countries or regions are still heavy. We need more effective strategies to prevent and reduce the burden of pneumoconiosis.