OBJECTIVE: To optimize the prescription of the novel temperature-sensitive liposomes(NTSL). METHODS: Calcein-loaded temperature-sensitive liposomes with different phospholipid composition (DPPC-MSPC-DSPE-PEG200=86:10:4 and N (20% HSPC + 80% DPPC) -MSPC-DSPE-PEG200=92:4:4) were prepared by the thin film -hydration method. Based on the fluorescence self-quenching off characteristics of calcein, the release behavior of the above liposomes was compared when exposed to 37°C (normal temperature) as well as their respective phase transition temperature (Tm). RESULTS: Compared with the traditional temperature-sensitive liposomes (TTSL), the NTSL showed more favorable temperature-sensitive release performance and more stable encapsulation ability to calcein, even with the amount of lysophospholipids was reduced by 60 percent. CONCLUSION: The application of NTSL helps to enhance the effect of temperature-sensitive release.

Objective:To study the anatomical correlation between dental arch and the volume of upper airway in patients with obstruc-tive sleep apnea hypoventilation syndrome(OSAHS). Methods: Dental arch architecture and upper airway volume were measured by cone beam CT(CBCT) in the subjects with OSAHS(n=22) and without OSAHS(n=19). The correlation between dental arch and the supper airway volume in OSAHS patients was analyzed. Results:The length of the upper dental arch and the height of palate in OSAHS patients were larger than those of the controls(All, P<0. 05). Cross-sectional area of nasopharynx and retropalatal and the total volume of upper airway were negatively correlated with the palatal height and upper dental arch length(P<0. 05), while positively correlated with upper dental arch of molar regions(P<0. 05). Conclusion:The abnormal shape of upper dental arch is related to the airway vol-ume of nasopharynx and retropalatal region in patients with OSAHS.

AIMTo prepare TK-gene nanoparticles and investigate its expression.

METHODSBiodegradable and biocompatible polymer polylactic-co-glycolic acid (PLGA) was used to prepare recombinant plasmid pEGFP-AFP nanoparticles by double-emulsion evaporation technique. The characteristics of the nanopticicles including morphology, entrapment efficiency was investigated. The expression of TK gene was also investigated by MTT assay, which could determine the dying cells after the addition of gancyclovir (GCV). The enhanced green fluorescent protein (EGFP) expression in human hepatocarcinoma SMMC-7221 cells and human normal parenchymal Chang liver cells were assessed by flow cytometric analysis.

RESULTSThe resulting plasmid-nanoparticles had regular spherical surface and a narrow particle size with a mean diameter of (72 +/- 12) nm, The average entrapment efficiency was 91.25%, the enhanced transfection efficiency and ability protecting plasmid DNA from degraded by nuclease or sonication due to nanoparticles encapsulation.

CONCLUSIONDNA-nanoparticles need further study as gene delivery system.

Biocompatible Materials ; Carcinoma, Hepatocellular ; metabolism ; Cell Line, Tumor ; Drug Delivery Systems ; Ganciclovir ; pharmacology ; Genes, Reporter ; Green Fluorescent Proteins ; Herpesvirus 1, Human ; enzymology ; Humans ; Lactic Acid ; Liver ; cytology ; metabolism ; Liver Neoplasms ; metabolism ; Luminescent Proteins ; genetics ; metabolism ; Nanotechnology ; Particle Size ; Plasmids ; Polyglycolic Acid ; Polymers ; Recombinant Proteins ; genetics ; Thymidine Kinase ; genetics ; metabolism ; Transfection ; alpha-Fetoproteins ; genetics ; metabolism

In order to investigate the prevalence and track genetic and antigenic evolutions of infectious bronchitis virus (IBV) and their prevalence in Guangxi, China since 1985, gene amplification and sequencing and virus neutralization (VN) test on chicken embryo tracheal organ cultures were used in genotyping and serotyping of 28 IBV isolates during 2009-2011 in Guangxi. The results of N gene sequencing and comparison showed that the 28 isolates and reference strains were classified into three groups, and most isolates belonged to group Ill, while the isolates in 1985-2008 belonged to groups IV and II. The data of VN test indicated that the 28 isolates belonged to 6 serotypes; among them, 71. 4% belonged to serotypes 1, 2, and 3, and 11 (39.3%) shared the same serotype with the current vaccine strains. Given the data of our previous study, it is found that prevalent serotypes and their proportions varied in different areas of Guangxi and during different periods. These data lay a good foundation for developing an oil-emulsified inactivated polyvalent vaccine containing local dominant serotypes for the effective prevention and control of infectious bronchitis.
Animals ; Antibodies, Viral ; immunology ; Chick Embryo ; Chickens ; China ; epidemiology ; Coronavirus Infections ; epidemiology ; immunology ; veterinary ; virology ; Infectious bronchitis virus ; classification ; genetics ; immunology ; isolation & purification ; Molecular Sequence Data ; Phylogeny ; Poultry Diseases ; epidemiology ; immunology ; virology

OBJECTIVETo observe clinical curative effect of cake-separated moxibustion on impaired glucose regulation (IGR) and explore its action mechanism.

METHODSSixty cases were randomly divided into a simple lifestyle intervention group (control group) and a cake-separated moxibustion combined with lifestyle intervention group (observation group), 30 cases in each one. The control group was treated with lifestyle intervention. Based on lifestyle intervention, cake-separated moxibustion at Pishu (BL 20), Weishu (BL 21) and Yishu (EX-B 3) was applied to the observation group. Fast plasma glucose (FPG), two hours plasma glucose after oral glucose tolerance test (OGTT2hPG), fasting insulin (FINS), homa insulin resistance index (HOMA-IR), blood lipid, body mass index (BMI) and waist circumference (WC) were observed in the two groups before and after treatment.

RESULTSAfter treatment, the OGTT2hPG and FPG were both decreased significantly (both P<0.05) in the two groups, compared between the two groups, the differences of FPG [(0.41 +/- 0.42) mmol/L vs (0.05 +/- 0.08)mmol/L] and OGTT2hPG [(0.85 +/- 0.53)mmol/L vs (0.17 +/- 0.19)mmol/L] were both statistically significant. There were no significant changes in FINS, HOMA-IR, blood lipid, BMI and WC in the control group before and after treatment (all P>0.05), but FINS, HOMA-IR levels, triglycerides (TG), total cholest-erol (TC), low density lipoprotein (LDL-C), BMI and WC in the observation group were decreased obviously after treatment (all P<0.05), which had statistical differences between the two groups (all P<0.05).

CONCLUSIONThe cake-separated moxibustion combined with lifestyle intervention can obviously control blood glucose levels, improve insulin resistance and blood lipid levels, decrease BMI and WC.

Adult ; Aged ; Female ; Glucose ; metabolism ; Glucose Intolerance ; metabolism ; physiopathology ; therapy ; Humans ; Insulin ; Male ; Middle Aged ; Moxibustion ; Waist Circumference

Objective To explore nursing care of the ex-utero intrapartum treatment (EXIT) in fetal neck mass oppressing airway. Methods A case of EXIT in which a fetal neck mass was diagnosed on ultrasound was fully prepared supplies and carried out. Nursing care was well implemented and vital signs of the puerpera and fetus were observed in preoperative and intraoperative surgery. Results The EXIT procedure was successful performed and vital signs of the puerpera and fetus were steadied. The score of Apgar was seven to eight. Conclusions Adequate equipment, multi-department collaboration, preoperative exercise and close cooperation are the important guarantee for the success of ex-utero intrapartum treatment.

OBJECTIVETo explore the relationship between job burnout and cognitive function and the influencing factors of job burnout among medical staff.

METHODSQuestionnaire survey was conducted for 197 medical workers in a grade-three general hospital in Beijing. Maslach Burnout Inventory-General Survey (MBI-GS) was carried out to assess the degree of job burnout among medical staff; Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) was used to evaluate the overall cognitive function and cognitive situations of different dimensions.

RESULTS(1) There was a certain level of job burnout among medical staff, especially for the emotional exhaustion dimension (13.29 ± 7.67). (2) High level job burnout group (81.08 ± 12.34) scored lower on visual span than low level job burnout group (92.48 ± 19.62), P<0.05. Overall, job burnout had a negative influence on the general cognitive function (P<0.05). (3) The results of regression analysis indicated that, inefficacy was negatively correlated with age (r=-0.162, P<0.05). Job burnout was positively correlated with level of education (r=0.234, P<0.05) as well as exercise frequency (r=0.320, P< 0.001), and emotional exhaustion was correlated with overtime work (r=0.135, P<0.05); Level of job burnout stayed higher among doctors and nurses, compared with administration staff in hospitals (t=2.966, P<0.05).

CONCLUSIONJob burnout of medical staff was relatively in high level; influenced by age, education level, overtime work, exercise frequency and occupational type, job burnout affected the visual span and general cognitive function.

Burnout, Professional ; Cognition ; Hospitals ; Humans ; Medical Staff ; psychology ; Nurses ; supply & distribution ; Physicians ; psychology ; Regression Analysis ; Surveys and Questionnaires

To prepare composite phospholipid liposomes containing total alkaloids of Strychnos nux-vomica with hydrogenated soybean phosphatidylcholine (HSPC) and 1, 2-dipalmitoyl-sn-glycero-3-phosphacholine (DPPC), and compare with normal DPPC thermosensitive liposomes for thermosensitive release property. Total alkaloids were extracted from S. nux-vomica with the impregnation method and further purified. Liposomes containing total alkaloids, thermosensitive liposomes and conventional thermosensitive liposomes without thermosensitive release property were prepared by ammonium sulfate transmembrane gradients and stealth liposome technique. Their encapsulation efficiency (EE), grain size, zeta potential and drug release behavior were compared. Their EEs and zeta potentials were almost identical; but the grain sizes of composite phospholipid liposomes and thermosensitive liposomes were significantly smaller than conventional liposomes. After comparing release behaviors of the three liposomes at 37, 43 degrees C, we found that the release of composite phospholipid liposomes was significantly lower than that of thermosensitive liposomes at 37 degrees C, but higher than that of thermosensitive liposomes at 43 degrees C. Meanwhile, conventional liposomes, with a very high phase-transition temperature, showed only slight release behavior at both temperatures. The study results showed that composite phospholipid liposomes had a better thermosensitive release behavior when the dosage of lysophosphatidic was reduced by 2. 5 times.
Alkaloids ; chemistry ; Liposomes ; chemistry ; Phospholipids ; chemistry ; Strychnos nux-vomica ; chemistry

OBJECTIVETo find out hydrolysis regularity of aconitine.

METHODAconitine was air-tighted and hydrolyzed in water for 8, 12, 16, 20, 24 h. The hydrolysis products were analyzed by HPLC-MS. A major hydrolysis product was isolated by alumina oxide column chromatography, and identified by 1H and 13C-NMR spectra.

RESULTHPLC-MS analysis shows that the major hydrolysis products are benzoylaconine and aconine. The hydrolysis can mostly be completed within 20 hours.

CONCLUSIONDiester aconitum alkaloid can be changed to monoester aconitum and aconine alkaloids. Under the controled condition benzoylaconine is a major hydrolysis products.

Aconitine ; analogs & derivatives ; chemistry ; isolation & purification ; Chromatography, High Pressure Liquid ; methods ; Hydrolysis ; Spectrometry, Mass, Electrospray Ionization ; Water ; chemistry

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Carcinoma, Renal Cell ; genetics ; metabolism ; Female ; Gene Expression Regulation, Neoplastic ; Humans ; Kidney Neoplasms ; genetics ; metabolism ; Male ; Matrix Metalloproteinase 2 ; genetics ; metabolism ; Middle Aged ; Transforming Growth Factor beta1 ; genetics ; metabolism ; Tumor Cells, Cultured ; Young Adult