Comet Assay

Objective To evaluate endoluminal repair and preoperative management for acute Standford type B aortic dissection complicating massive hydrothorax. Methods The clinical data of 27 patients (23 males, 4 females) hospitalized from January 2003 to December 2008 were analysed retrospectively. The average age was 47 ±9 years (35 ～70). Eleven patients had bilateral huge hydrothorax (40. 7% ) , while 13 had left hydrothorax (48. 1% ) and 3 had right hydrothorax (11. 1% ) only, and in 2 of them with additional pericardial effusion (7.4% ). SaO2 was below 90% in all cases. All patients underwent emergency endovascular repair. For control of massive hydrothorax found by CT or chest fluoroscopy, puncture drainage or tube drainage were administrated postoperatively. Results All the 27 operations were successful, and there was no perioperative mortality. Three type Ⅰ and one type Ⅳ endoleaks occurred but disappeared in one month. Hydrothorax disappeared 28 days to 3 months postoperatively in all patients, of which 5 cases had puncture drainage (18.5%) and 1 case had tube drainage ( 3. 7% ). Mean follow-up was 30 ± 20 m ( 6 ～ 78 m ) after endovascular management. Complications included pleural thickening (6 of 27, 22. 2% ) , pulmonary atelectasis (2 of 27, 7. 4% ) , and lung consolidation combined with chest dent (2 of 27, 7. 4% ). Conclusions Emergency endovascular therapy is safe and effective for acute Stanford type B aortic dissection with massive hydrothorax. Drainage of hydrothorax after stent-graft deployment is a must for the patient suffering from severe respiratory failure.

Objective To prepare high-titer monoclonal antibodies against STX2A1 subunit of enterohemorrhagic E.coli(EHEC) O157∶H7.Methods BALB/c mice were immunized with GST-STX2A1 fusion protein and the spleen cells of BALB/c mice which were not immunized were used as feeder cells.Hybridoma technique,natural STX2A protein and ELISA test were used to prepare and screen the hybridoma cell lines of monoclonal antibodies against STX2A1.The ascites developed by injecting the hybridoma cells into abdominal cavity of the BALB/c mice and was purified with Protein A-Sepharose.The subclasses and isotypes were identified by mouse monoclonal antibody isotyping kit.The antigenic epitopes that can be recognized by STX2-1A3,STX2-1E10 and STX2-3A7 were analyzed by the ELISA additivity test.Results Three hybridoma cell strains were obtained and named as STX2-1A3,STX2-1E10 and STX2-3A7,respectively,all of which produced monoclonal antibodies specifically against STX2A1.The isotypes of the monoclonal antibodies were IgG1?,IgG1?,and IgG3? and the affinity constant was 5.76 ?109,1.21 ?109 and 3.97 ?108,respectively.Conclusion We have successfully prepared three hybridoma cell strains which secrete high-titer and highly specific monoclonal antibodies against STX2A1.Our study provides a basis for researching the early diagnosis,prevention and cure of the disease induced by EHEC O157∶H7.

Objective To understand the correlation of enterovirus 71 (EV71), P-selectin glycoprotein ligand-1 (PSG L-1), and scavenger receptor B2 (SCARB2) and to explore the possible pathway and mechanismof EV71 infection by observing the expression of EV71, PSG L-1 and SCARB2 in tissues of infants with brain stemencephalitis. Methods T he organs and tissues of infants with EV71-VP1 positivi-ty in their brain stems were chosen. Expression and distribution of EV71-VP1, PSG L-1, and SCARB2 were detected and compared by immunohistochemistry. Results Strong staining of EV71-VP1 was ob-served in the neuron, glial cells, the inflammatory cells of perivascular cuffing, parietal cells of the gas-tric fundus gland while alveolar macrophages, intestinal gland epitheliumcells, mucosa lymphoid nodule and lymphocyte of palatine tonsil showed moderate staining and weak staining were displayed in mesen-teric lymph nodes and lymphocyte of spleen. PSG L-1 expression was detected in parietal cells of the gastric fundus gland, tonsillar crypt squamous epithelium, alveolar macrophages and leukocytes in each tissue. SCARB2 expression was observed in all the above tissues except the intestines and spleen. Con-clusion T he distribution of EV71 correlates with SCARB2 expression. SCARB2 plays an important role in virus infection and replication. Stomach may be an important site for EV71 replication.

Heat shock protein 90 is a new target of antitumor drug, the inhibitor of Hsp90 fight against tumor by destroy and degrade the structure of protein. In recent years, looking for Hsp90 inhibitor is not only via structure modifying of natural products, but also via high throughput screening and computer aided drug design to find and synthesize new kinds of Hsp90 inhibitor. Anyway, Hsp90 inhibitor has considered as an important biology target and to pay more and more attention. This review describes recent developments of small molecule Hsp90 inhibitors.
Adenine ; analogs & derivatives ; chemistry ; pharmacology ; Animals ; Anisoles ; chemistry ; pharmacology ; Antineoplastic Agents ; chemistry ; pharmacology ; therapeutic use ; Benzoquinones ; chemistry ; therapeutic use ; Catechin ; analogs & derivatives ; chemistry ; pharmacology ; Cell Line, Tumor ; Crystallization ; HSP90 Heat-Shock Proteins ; antagonists & inhibitors ; chemistry ; Heterocyclic Compounds, 2-Ring ; chemistry ; pharmacology ; Humans ; Lactams, Macrocyclic ; chemistry ; therapeutic use ; Macrolides ; chemistry ; pharmacology ; Molecular Structure ; Neoplasms ; drug therapy ; pathology ; Pyrazoles ; chemistry ; pharmacology ; Structure-Activity Relationship

OBJECTIVETo inquire into the relationship between lipoprotein lipase (LPL) gene D9N, N291S and S447X polymorphisms and the development of cardiovascular diseases in children with obesity.

METHODSThe polymerase chain reaction (PCR) and restriction fragment length polymorphism (RLFP) techniques were used to detect three common mutations of LPL gene exon D9N, N291S and S447X in 157 obese children and 175 normal controls. Plasma lipid and lipoprotein levels between children with different genotypes were compared.

RESULTSThe D9N and N291S gene mutations were not detected in either the obese or the control groups. There were no significant differences in the frequency of S447X gene mutation between the two groups. There were no significant differences in the levels of plasma lipid and lipoprotein between children with S447 and X447 genotypes.

CONCLUSIONSD9N and N291S gene mutations may not be risk factors associated with cardiovascular diseases in children with obesity. S447X gene mutation might not play an important role in the development of cardiovascular diseases in childhood.

Adolescent ; Cardiovascular Diseases ; etiology ; genetics ; Child ; Female ; Humans ; Lipoprotein Lipase ; genetics ; Male ; Mutation ; Obesity ; genetics ; Risk Factors

With the content of gallic acid, loganin, paeoniflorin and paeonol as the indexes, to screen out dissolution determination conditions, establish the dissolution determination method for multi-index components in Liuwei Dihuang concentrated pills, calculate and map the accumulative dissolution curve, and then compare the dissolution of products from different pharmaceutical factories through the similarity factor (f2). According to the results, the optimum dissolution determination conditions were the paddle method, with 250 mL 0.1 mol x L(-1) hydrochloric acid as the dissolution medium, and a rotation rate of 100 r x min(-1). The similarity factor values (f2) of the dissolution curves of the four main components of Liuwei Dihuang concentrated pills from different pharmaceutical factories were mostly less than 50. This demonstrated a significant difference in the dissolution of Liuwei Dihuang concentrated pills from different pharmaceutical factories, and provided scientific basis for improving the equality evaluation of Liuwei Dihuang concentrated pills.
Drugs, Chinese Herbal ; chemistry ; Humans ; Organic Chemicals ; analysis ; Quality Control ; Solvents ; chemistry

Objective　To investigate the role of cytotoxic T lymphocyte associated molecule-4Ig(CTLA-4Ig) in the prevention of C57BL/6 mice autoimmune hepatitis. Methods　The C57BL/6 mice were intraperitoneally immunized with C57BL/6 mice liver-specific protein in complete Freund's adjuvant. At the same time CTLA-4Ig were given to observe the pathologic alteration of C57BL/6 mice liver. Results　With the increase of time of immunization, the results in the treatment group were similar to those of the control group; but inflammatory cell infiltration, hepatic cell swelling, focal necrosis and severe hepatocyte damage were found in the pathologic model group. There was a significant difference between the pathologic model group and control one. Conclusion　Autoimmune hepatitis of C57BL/6 mice can be effectively prevented by CTLA-4Ig.

Abstract: Objective　To analyze the emergency response and long-term intervention effects after the detection of infectious snails epidemic by loop-mediated isothermal amplification (LAMP) assays in Hannan District, Wuhan City, and to explore the application of LAMP in early surveillance and early-warning of schistosomiasis transmission. Methods Snails picked up by the risk monitoring system in Hannan District were examined by anatomical microscopy and LAMP technology to identify the schistosomiasis infection. Emergency response and intensive intervention were initiated in the environment where positive snails appeared, and the long-term effects were evaluated. Results In May 2018, the infectious snails were detected by LAMP technology in Hannan District, and the positive snails were located in Zhujiacha, Dongzhuang Village, Obstacles and weeds were removed and buried by machine in Zhujiacha. 12 700 m2 of snails were killed by drugs, and the mortality rate of snails was more than 80%; no new seropositive persons were found in the emergency examination within 500 m of the positive snail sites. 506 people were examined in Dong Zhuang Village at the end of the year, and 30 positive IHA cases were detected with a blood positive rate of 5.93%, no positive fecal test was found, and all positive blood test patients took preventive medication. The monitoring results of sentinel rats and wild feces were all negative. Health education was carried out, 7 warning signs were deployed and refreshed, and 500 publicity brochures were distributed. After nearly three years of intensified intervention and monitoring in the villages where the positive environment is located, and the density of snails on the stubborn snail has dropped from 0.094/frame to 0.027/frame, and the positive rate of blood test in Dongzhuang Village has steadily dropped from 5.93% to 3.74%. Conclusions The infected snails missed by microscopy were detected by LAMP in Hannan District, which created conditions for the rapid emergency treatment of environment and elimination of positive snail and improved the sensitivity of the surveillance and early warning system in transmission-interrupted areas.