OBJECTIVE To analyze the epidemiological characteristics,the efficiency of the surveillance system for nosocomial infections in our hospital,the sensitivity,specificity and timeliness of case reporting and to evaluate the efficiencies of the monitoring and reporting system.METHODS We reviewed the nosocomial infection reporting data in the year of 2005 and identified all the reported cases,confirmed cases and under-reported cases.Sensitivity and specificity of the reporting system were calculated based on these data.RESULTS The incidence of nosocomial infection was 3.04% in 2005.A majority(72.07%) of the cases were reported within 7 days of occurrence.Respiratory tract infection accounted for 57.75% of all nosocomial infections and was by far the most common site of concern.The rates of false positive reporting ranged from 14-37% and were statistically significantly associated with the sites of the infection(P

This study was aimed to establish a method for quality control of Tibetan medicine Shi-Wei Xiao-Shi-San (SWXSS). Thin layer chromatography (TLC) was established for the qualitative determination. Cinnamal and piperine were determined by HPLC. The separation was performed on Phenomenex C18 column (4.6 mm × 250 mm, 5μm). The results showed that TLC can be used in the identification of pomegranate seed and Terminalia chebula. The linear ranges of cinnamal and piperine were within the range of 0.06-0.37μg and 0.05-0.33μg, respectively. And the standard line was Y=9.273 2×106X-2.348 2×105, r=0.999 8;Y=7.315×103X-3.857, r=1.000 0. It was concluded that the identification method was specific, accurate and practical, which can be applied in the quality control of SWXSS.

Objective To explore the risk factors of surgical site infection(SSI)in patients undergoing selective brain tumor resection,and provide reference for clinical prevention and treatment.Methods Patients who under-went selective brain tumor resection in the neurosurgery department of a hospital during April-September 2013 and April-September 2014 were monitored prospectively,monitoring programme and individualized questionnaire were formulated,the basic data,operation condition,postoperative symptoms/signs,laboratory test results,infection-related factors,and antimicrobial use in patients were collected,risk factors for infection were analyzed.Results A total of 205 patients were investigated,23 (11 .22%)of whom had SSI;univariate analysis showed that body mass index (BMI),NNIS score,and cerebrospinal fluid leakage were related to the occurrence of SSI(all P<0.05);lo-gistic regression analysis showed that high NNIS score and cerebrospinal fluid leakage were independent risk factors for SSI in patients undergoing selective brain tumor resection(both P<0.05).Conclusion Incidence of SSI is high-er in patients with selective brain tumor resection,corresponding preventive measures should be taken according to different risk factors including cerebrospinal fluid leakage.

The monoamine oxidase mutant A-1 (F210V/L213C) from Aspergillus niger showed some catalytic activity on mexiletine. To futher improve its activity, the mutant was subjected to directed evolution with MegaWHOP PCR (Megaprimer PCR of Whole Plasmid) and selection employing a high-throughput agar plate-based colorimetric screen. This approach led to the identification of a mutant ep-1, which specific activity was 189% of that for A-1. The ep-1 also showed significantly improved enantioselectivity, with the E value increased from 101 to 282; its kinetic k(cat)/K(m) value increased from 0.001 51 mmol/(L x s) to 0.002 89 mmol/(L x s), suggesting that catalytic efficiency of ep-1 had been improved. The mutant showed obviously higher specific activities on 7 of all tested 11 amines substrates, and the others were comparable. Sequence analysis revealed that there was a new mutation T162A on ep-1. The molecular dynamics simulation indicated that T162A may affect the secondary structure of the substrate channel and expand the binding pocket.
Aspergillus niger ; enzymology ; Catalysis ; Kinetics ; Monoamine Oxidase ; genetics ; metabolism ; Mutation ; Polymerase Chain Reaction ; Protein Engineering ; Protein Structure, Secondary ; Substrate Specificity

Abstract: In order to investigate immune protection against swine-origin influenza virus (S-OIV) A H1N1, the helper-dependent adenovirus vector (HDAd) system was exploited to construct recombinant HDAd encoding hemagglutinin (HA). The HA gene was synthesized and cloned to the HDAd backbone. Then, the HDAd/HA DNA molecules were transfected into 293Cre4 cells with calcium phosphate. The cells were infected by helper virus 16 hours after the transfection. The 293Cre4 cells were coinfected with HDAd/HA and the helper virus for large-scale preparation of HDAd/HA. The HDAd/HA was obtained and purified twice with CsCI density ultracentrifugation and observed morphologically under transmission electron microscope, and the expression of HA protein was analyzed with RTPCR. Recombinant HDAd/HA expressing HA protein was successfully constructed which could pave the way for in vivo investigation on immunogenicity and efficacy against S-OIV A H1N1 infection.
Adenoviridae ; Cell Line ; Cloning, Molecular ; Genetic Vectors ; Helper Viruses ; Hemagglutinin Glycoproteins, Influenza Virus ; biosynthesis ; Humans ; Influenza A Virus, H1N1 Subtype

The field of gene therapy has been increasingly studied in the last four decades, and its clinical application has become a reality in the last 15 years. Traditional Chinese medicine (TCM), an important component of complementary and alternative medicine, has evolved over thousands of years with its own unique system of theories, diagnostics and therapies. TCM is well-known for its various roles in preventing and treating infectious and chronic diseases, and its usage in other modern clinical practice. However, whether TCM can be applied alongside gene therapy is a topic that has not been systematically examined. Here we provide an overview of TCM theories in relation to gene therapy. We believe that TCM theories are congruent with some principles of gene therapy. TCM-derived drugs may also act as gene therapy vehicles, therapeutic genes, synergistic therapeutic treatments, and as co-administrated drugs to reduce side effects. We also discuss in this review some possible approaches to combine TCM and gene therapy.

Objective The aim of this study was to investigate the co-operative role of HGF and IL-1ra in metastatic processes by interactions between colon cancer cells and stromal cells in their microenvironment.Methods Expression of IL-1α,HGF and c-Met mRNA and proteins were determined by RT-PCR and Western blot.The effect of HGF on metastatic potential was evaluated by proliferation,invasion,and angiogenesis assays using an in vitro system consisting of co-cultured tumor cells and stromal cells.Results IL-1α expression was closely correlated with metastatic potential,and cancer cell-derived IL-1α significantly promoted HGF expression by fibroblasts (P ＜ 0.01).HGF enhanced the migration and proliferation of human umbilical vein endothelial cells (HUVECs),and angiogenesis (P ＜ 0.01).The high liver-metastatic colon cancer cell line (HT-29),which secretes IL-1 α,significantly enhanced angiogenesis compared to the low liver-metastatic cell line (CaCo-2),which does not produce IL-1 α (P ＜ 0.01).IL-1 ra significantly inhibit migration,proliferation and angiogenesis (P ＜ 0.01).Conclusions Autocrine IL-1α and paracrine HGF enhance the metastatic potential of colon cancer cells;IL-1ra inhibit the metastatic potential of colon cancer cells by blocking IL-1α and HGF signaling pathways.

This study was aimed to set up the fingerprint chromatograms of chemical principles of Dendrobii Caulis by HPLC-DAD-ELSD. This analysis was performed at 30°C on a Dikma Cl8 column (250 mm × 4.6 mm, 5 μm) with a mobile phase consisting of acetonitrile-0.5% glacial acetic acid, gradient elution, at the flow rate of 1.0 mL?min-1 with DAD and ELSD detection. The HPLC fingerprint of Dendrobii Caulis was established. And 9 fingerprint peaks were marked. The similarity among different species was low. This method was stable, reliable and repeatable. It is useful for the study on the relationship between chemical components and species of Dendrobii Cauli.

To investigate the relationship between the plasma biomarker proteins and the states of Zang-Fu organs in patients with phlegm or blood stagnation syndromes due to hyperlipidemia and atherosclerosis.

Objective To explore the value of anti-Müllerian hormone (AMH) and age in predicting outcomes of patients undergoing in vitro fertilization and embryo transfer treatment. Methods In this retrospective study, 6 328 Chinese patients who underwent the first in vitro fertilization or intracytoplasmic sperm injection and embryo transfer treatment in Henan Provincial People′s Hospital between July 2016 and July 2018 were analyzed. All the patients were categorized into two groups according to pregnancy or not. Baseline data and outcomes of two groups were compared. The regression analysis was conducted to identify the independent factors of clinical pregnancy rates. Furthermore, correlation analysis was performed between AMH and other factors. Results (1) The total clinical pregnancy rate was 56.86% (3 547/6 238). Age, AMH, basal FSH, antral follicle number (AFC), starting dose of gonadotropin (Gn), total doses of Gn, duration of Gn, number of oocytes, transferable cleavage embryos and transferred embryos were significantly different (all P<0.01). (2) Correlation analysis showed that AMH had significant passive correlation with age, basal FSH, starting dose of Gn and total doses of Gn (all P<0.01), while showed significant positive correlation with AFC, body mass index, duration of Gn, number of oocytes and transferable cleavage embryos (all P<0.01). Of all the factors, AMH had the strongest correlation with AFC (P<0.01). (3) Multivariate logistic regression analysis suggested that age was the independent influencing factor of clinical pregnancy rate ( OR=0.938, 95%CI : 0.824-0.952, P<0.01), while AMH not ( OR=1.004, 95%CI : 0.984-1.024, P=0.687). In the subgroups according to age, the advanced group (age>35 years old) had lower clinical pregnancy rate and higher cancellation rate for no available embryos. Conclusions AMH has no predictive value of clinical pregnancy outcomes for patients with in vitro fertilization and embryo transfer treatment, while age has certain predictive value of pregnancy outcomes. AMH level may have indictive value for the evaluation of ovarian reserve.