Abstract: Objective　To analyze the drug sensitivity and the carrying of carbapenem resistant gene of Acinetobacter baumannii isolated from clinical patients and clinical objects, and analyze the homology of strains to provide support for the control of nosocomial infection. Methods　A total of 38 strains of Acinetobacter baumannii isolated from patients and clinical objects surface were collected from January 2019 to August 2020. The antimicrobial susceptibility was tested by the minimum inhibitory concentration method. In addition, the resistance related genes were detected by polymerase chain reaction method, and homology analysis was performed by enterobacterial repetitive Enterobacterial Repetitive Intergenic Consensus Polymerase Chain Reaction (ERIC-PCR). Results All 34 strains of Acinetobacter baumannii isolated from Clinical patients and 4 strains isolated from clinical objects carried blaOXA-51 and imp resistance genes, neither of them carried blaVIM gene. 32 Acinetobacter baumannii carrying blaOXA-23 gene, 28 strains carrying blaTEM gene, 7 strains carrying blaOXA-58 gene. After cluster analysis, 38 Acinetobacter baumannii isolates were classified into 7 genotypes (expressed A, B, C, D, E, F, G), and cluster E and cluster G were the main clusters, containing 12 strains (12/38, 31.6%) and 18 strains (18/38, 47.4%), respectively, as the main prevalent clonal strains. Conclusions　Acinetobacter baumannii isolated from different sources have the significant differences in drug resistance and carry different resistance genes. There is no direct correlation between patients and environmental isolates of Acinetobacter baumannii belonging to different clonal strains. Also, there aren’t significant correlation between clinical patients infected with Acinetobacter baumannii.

Objective To study the clinical significance of the serum angiopoietin-2(Ang-2) in the diagnosis,recurrence,invasion and metastasis of gastric cancer.Methods The serum Ang-2 and carcino-embryonic antigen (CEA) levels in 158 patients with gastric cancer (gastric cancer group) and 30 normal controls(control group) were measured by enzyme linked immunosorbent assay(ELISA) technique respectively.The serum Ang-2 and CEA levels were also measured 2 weeks after operation in gastric cancer group and reexamined in the recurred gastric cancer patients in 2 years after operation (recurred and metastasis group).The correlation between the serum Ang-2 level and pathologic c haracterization of gastric cancer was evaluated.Results The serum Ang-2 and CEA levels in gastric cancer group [ (331.8 ±64.3),(42.6 ±37.3)μg/L] and recurred and metastasis group [(318.7 ±72.9),(40.5 ±36.7)μg/L] were significantly higher than those in control group [ (187.4 ± 32.7),(4.2 ± 3.1 )μ g/L] (P ＜ 0.01 ),and the serum Ang-2 level 2 weeks after operation [ (211.6 ± 75.1 ) μ g/L ] was significantly decreased to the control group (P ＞ 0.05 ),while the serum CEA level [ (33.4 ± 30.6) μ g/L ] was still significantly higher than the control group (P ＜ 0.01 ).The sensitivity of the serum Ang-2 for diagnosis of gastric cancer was markedly higher than that of the serum CEA (P ＜ 0.01 ).There was correlation between serum Ang-2 and degree of tumor differentiation,TNM pathological staging,lymphatic metastasis,invasion depth and tumor size (p ＜0.01 ),but there was no correlation between serum Ang-2 and tissue classification and location of gastric cancer (P＞ 0.05).Conclusion The serum Ang-2 level is suggested to be a valuable gastric cancer marker and conduce to the diagnosis of gastric cancer,the monitoring of recurrence after operation and evaluation of prognosis.

OBJECTIVETo apply the Wright-Giemsa stain in micronucleus test and to explore the stain outcomes of Wright-Giemsa dye of various proportions and staining times.

METHODSUse Wright-Giemsa dye, Wright dye (staining time 3 min) and Giemsa dye (staining time 5 min) to stain HepG2 and then observe the staining effect. The Wright-Giemsa dye was applied under 5 different proportions (3:1-1:3) and different staining times (1, 3, 5, 10, 15 min).

RESULTSAfter stained for 3-5 min with the proportion ratio of 3:1 of Wright-Giemsa dye, the HepG2 cells showed much better staining outcomes compared with the single stain of either Wright or Giemsa.

CONCLUSIONSWright-Giemsa stain can be used in cell micronucleus test to obtain good staining outcomes.

Azure Stains ; Coloring Agents ; Hep G2 Cells ; Humans ; Micronucleus Tests ; Staining and Labeling ; methods

Animals ; Brain-Derived Neurotrophic Factor ; pharmacology ; Cell Movement ; drug effects ; Cell Proliferation ; drug effects ; Cells, Cultured ; Chick Embryo ; Chorioallantoic Membrane ; blood supply ; Endothelial Cells ; cytology ; drug effects ; physiology ; Female ; Humans ; Mice ; Mice, Inbred C57BL ; Neovascularization, Physiologic ; drug effects ; Vascular Endothelial Growth Factor A ; pharmacology

Objective:To analyze the relationship between hepatitis B virus(HBV)gene mutation at 1896 in precore region with genotype and replication of HBV and the liver function of patients.Methods:HBV precore 1896 site mutation,the genotype of HBV and serum content of HBV DNA were determined by PCR in 60 patients positive of HBV DNA.Chemiluminescence miacropaticle immunoassay(CMIA)was used for detection of serum HBeAg and HBeAb.Liver function parameters were ob- tained by routine biochemistry method.Results:The alanine aminotransferase(ALT)level in HBV with 1896 site mutation was significantly higher than that in the wildtype virus.Site mutation at 1896 had no correlation with HBeAg,HBV genotype and HBV DNA content.HBV DNA content in patient with genotype C was significantly higher than that with genotype B(P

0.05); serum HBsAb levels of pregnant mice and neonatal mice in group with CpG-1826 (20 ?g)+hepatitis B vaccine significantly higher than those in group with CpG-1826 (10 ?g, 40 ?g)+ hepatitis B vaccine,hepatitis B vaccine and control respectively(P0.05).Conclusions Combination injection of CpG-1826 20 ?g and hepatitis B vaccine can markedly increase serum antibody levels of pregnant mice and neonatal mice, but don′t affect the survival quantity, the growth and development of neonatal mice.CpG-1826 is an ideal immune adjuvant for neonates with immature immune system during pregnancy.

Fermentation for Eicosapentaenoic Acid(EPA) production by Nitzschia laevis at various temperature between 10℃ and 30℃ was investigated and the dynamics characteristics during fermentation process were also analyzed.Based on the results,a varying temperature nursing method of two stage control strategy is proposed:During the first stage,which comprises the delay phase and the initial index phase,the temperature is maintained at 25℃;then the temperature is shifted to 20℃ and kept up till the end of the fermentation process.By this method,a EPA content of 6.0% and a yield of 291.60 mg/L have been gained.These are 24.07% and 18.81% higher than that of fixed temperature(25℃) fermentation,respectively.

In-vitro assay methods were established to evaluate transactivation and binding activity of compounds on peroxisome proliferator-activated receptor y (PPARγ). Firstly, plasmids were constructed for transactivation assay of PPARγ response element (PPRE) triggered reporter gene expression, and for cell-based binding activity assay of the chimeric receptor, which was fused with PPARγ ligand binding domain (LBD) and yeast transcriptional activator Gal4. Secondly, by using PPARy competitive binding assay based on time resolved-fluorescence resonance energy transfer (TR-FRET), affinities of compounds and drugs to PPARγ were evaluated. In application of these above methods, the PPARγ activating potency and characteristics of different compounds were evaluated, and a novel benzeneselfonamide derivative, ZLJ01, was found to have comparable binding activity and affinity with the well-known PPARy agonist, but lack of PPRE mediated transactivation activity. In preliminary study on in-vitro hypoglycemic activity, ZLJ1 was found to promote insulin-stimulated glucose uptake by liver cells. Therefore, we believe that combining transactivation and binding activity as well as affinity evaluation, the system could be used to screen non-agonist PPARγ ligand as anovel PPARγ modulator
Genes, Reporter ; Hepatocytes ; Hypoglycemic Agents ; chemistry ; Ligands ; PPAR gamma ; agonists ; chemistry ; Plasmids ; Response Elements ; Sulfonamides ; chemistry ; Transcriptional Activation

OBJECTIVETo investigate whether myocardial bridging (MB) is independently associated with coronary atherosclerosis proximal to MB in the left anterior descending coronary artery (LAD) identified by computed tomographic coronary angiography (CCTA).

METHODSFrom March 2011 to December 2012, patients (n=9 862) with suspected coronary disease underwent CCTA using dual-source CT scanner. The baseline clinical characteristics (age, gender, smoking history, presence of hypertension, dyslipidemia, diabetes mellitus, family history of heart attack, and body mass index) and the results of CCTA were reviewed. Two radiologists evaluated the coronary artery for MB and coronary atherosclerosis stenosis (CAS) in LAD and made a diagnosis by consensus. Significant independent risk factors for CAS were investigated by multivariate logistic regression analysis.

RESULTSA total of 3 182 (32.3%) cases of MB and 3 359 cases of CAS of LAD were identified. No patient with CAS in the tunneled segment was found. The mean length of bridges and the mean thickness of the overlying myocardium was (17.3±5.2) mm and (1.2±0.9) mm, respectively. There were 1658 MB cases in 3 359 cases of LAD stenosis and 1 524 MB cases in 6 503 cases of no LAD stenosis (χ(2)=681.12, P<0.05). Logistic regression analysis showed that MB in the LAD were significantly associated with CAS in the proximal LAD (OR=3.07, 95%CI=2.81-3.37, P<0.001), and after final adjustment for age, gender, body mass index, family history of heart attack, smoking, hypertension, dyslipidemia, diabetes mellitus, and resting heart rate (OR=2.86, 95% CI=2.60-3.16, P < 0.001).

CONCLUSIONMB in the LAD is independently associated with CAS in the proximal segment to MB.

Adult ; Aged ; Aged, 80 and over ; Coronary Stenosis ; complications ; diagnostic imaging ; Female ; Humans ; Logistic Models ; Male ; Middle Aged ; Myocardial Bridging ; complications ; diagnostic imaging ; Risk Factors ; Tomography, X-Ray Computed

Animals ; Chemical and Drug Induced Liver Injury ; drug therapy ; Liver ; drug effects ; pathology ; Mice ; Silymarin ; pharmacology ; Ursodeoxycholic Acid ; pharmacology