Dynamics of parenting styles of adolescent students from the perspective of intergenerational conflict / 中国学校卫生

Objective@#To explore dynamics of parenting styles of adolescents from 1999 to 2019 from the perspective of intergenerational conflict, to provide support for family education and adolescent healthy development.@*Methods@#Using a multistage stratified cluster random sampling method, the unified questionnaire was administered to 2 590 students in the same sampling junior and senior high schools in 1999, 2009, and 2019 using the Egna Minnen av Barndoms Uppfostran own memories of parental rearing practices in childhood(EMBU).@*Results@#Overall there were differences in the nine factors of parenting styles across generations ( F = 12.07-72.52, P <0.01), with decreasing ratings of warmth and understanding of father and mother (F1, M1), over interference of father (F3) over generations(F1:46.72±9.41, 45.87±11.33, 43.61±11.27; M1:51.56±9.38, 51.03±11.59, 46.23± 12.27 ; F3:19.03±4.00, 18.29±4.32, 17.95±4.51), and all other parenting styles rated higher in 2019 than in 2009 and 1999(except for the over protection and over interference of mother, and punishment, firm control of mother). Parenting styles across generations (except for the rejection and denial of father among girls) showed gender difference.The overall gender trend coincided with the total population trend. Parenting styles across generations varied significantly among middle and high school students( F =3.92-47.27, P <0.05 ), changes in F1 and F3 factors coincided with the overall decreasing trend. Factor analysis showed that parenting styles could be classified into two dimensions, with varied factor loading across generation.@*Conclusion@#Intergenerational decreases in parental emotional warmth and paternal interfering are observed in a sex and grade specific manner. Based on the diversity of needs and population differentiation, optimal intervention for comprehensive health development of adolescents are in great need to keep pace with the times and promoting the high quality development of adolescents.

Practice guideline for patients with osteoporosis / 中华内科杂志

In recent years, osteoporosis (OP) has become one of the main diseases affecting the health of middle-aged and elderly people in China, and the prevalence of OP has increased significantly. The clinical diagnosis and treatment guidelines for this disease are also constantly updated. The overall principles speciallyemphasise that doctors and patients need to work together to negotiate the details of the diagnosis and treatment guidelines, in order to improve the OP clinical diagnosis and treatment rate. Therefore, patients′ knowledge of the disease, understanding of clinical guidelines, and cooperation with doctors to implement diagnosis and treatment plans are very important. In this study, from the most concerned issues of the patients, we established the OP patient practice guideline working group. 14 recommendations, as the OP patient practice guidelines, are proposed in accordance with the relevant principles of the "World Health Organization guidelines development manual" and the international normative process.

Practice guidelines for patients with rheumatoid arthritis / 中华内科杂志

In recent years, the clinical guidelines for the diagnosis and treatment of rheumatoid arthritis (RA) have been constantly updated. Among the general principles, it is particularly emphasized that, in order to improve the ratio of treat to target(T2T) of RA, doctors and patients should work together to negotiate the details of the guidelines. Therefore, it is important for patients to further understand the disease and clinical guidelines of RA, and to better cooperate with doctors. This study was based on the most concerned issues of RA patients and international standard procedure of guideline study, we organized the working group and introduce the following 16 recommendations constituting the RA patients′ practice guidelines.

Practice guideline for patients with hyperuricemia/gout / 中华内科杂志

Hyperuricemia/gout is a common metabolic disease in China, which is a serious threat to people′s health. In clinical practice, the standardization of prevention and diagnosis and the rate of treat-to-target need to be improved. There is still a lack of education for the patients about the understanding of clinical guidelines, the disease knowledge and the importance of cooperating with doctors to carry out diagnosis and treatment. From the most concerned issues of the patients, we established the hyperuricemia/gout patient practice guideline working group with multidisciplinary physicians and patients. Seventeen opinions, as the hyperuricemia/gout patient practice guidelines, are proposed in accordance with the relevant principles of the "WHO guidelines development manual" , and with the international normative process, aiming to improve the patients compliance, improve the level of health management of the disease.

Practice guideline for patients with ankylosing spondylitis/spondyloarthritis / 中华内科杂志

In recent years, the clinical experts consensuses or guidelines of ankylosing spondylitis (AS)/spondyloarthritis (SpA) have been constantly updated, but to better understand and practice, patient self-participation management is one of the key points to improve the level of diagnosis and treatment. Through questionnaire survey of these patients, we screened out the most concerned issues, and established the AS/SpA patient practice guideline working group with multidisciplinary physicians and patients. Fifteen opinions, as the AS/SpA patient practice guidelines, are proposed in accordance with the relevant principles of the "WHO guidelines development manual" , and with the international normative process.

A single decline of FEV3/FVC in determine the application potential of early lung disease / 中国医师杂志

Objective To explore the application potential of forced expiratory volume in three second/forced vital capacity (FEV3/FVC) in early lung diseases,such as early airway obstruction and mild gas trap.Methods A total of 288 patients (excluding those with restrictive ventilation dysfunction) who underwent pulmonary function examination in the pulmonary function room of our hospital from January 2014 to October 2017 were collected.288 patients were divided into three groups.Group A:FEV3/FVC and forced expiratory volume in one second/forced vital capacity (FEV1/FVC) were normal;Group B:FEV3/FVC decreased alone;Group C:FEV1/FVC decreased.The general data and pulmonary function indexes of the three groups were compared.Results Compared with group A,group B had lower FEV1 ％ and diffusion capacity for carbon monoxide of the lung (DLCO％),but higher total lung capacity (TLC％),residual volume (RV％) and RV/TLC.Compared with group B,group C had higher TLC ％,RV％,RV/TLC％,while FEV1％,DLCO％ reduce more remarkably.There were significant differences in the three groups of small airway function (P ≤ 0.01).FEV3/FVC was positively correlated with max expiratory at 50％ FVC (MEF50％),max expiratory at 75％ FVC (MEF25％) and maximal mid expiratory flow (MMEF％).The correlation coefficients were respectively 0.613,0.610,0.608 (P ≤0.01).When FEV3/FVC serves as an indicator to determine airway obstruction,the specificity of it is 45.7％,sensitivity 98.5％,and negative predictive value 99％,positive predictive value 35.5％.Conclusions FEV3/FVC individual decline is the indication of early lung diseases such as mild airway obstruction,mild gas trap and diffuse disorder.

Difference of the clinical characteristics and outcome between interstitial lung disease with dermatomyositis and idiopathic pneumonia fibrosis / 中国医师杂志

Objective To compare the clinical features and prognosis between dermatomyositis-associated interstitial lung disease (DM-ILD) and idiopathic pulmonary fibrosis (IPF).Methods Patients with interstitial lung disease with dermatomyositis (DM-ILD) or idiopathic pneumonia fibrosis (IPF) from January 2003 to March 2014 in the third affiliated hospital of Sun Yat-sen University were included.Results Among the 64 patients enrolled,44 were DM-ILD and 20 were IPF.IPF was more common in the elderly (P =0.000),men (P =0.004) and smokers (P =0.000),and its high-resolution computed tomography (CT) mostly showed grid shadow (P=0.014) and honeycomb shadow (P=0.000).DM-ILD usually had cough symptoms (P =0.025).High-resolution CT showed patchy (P =0.048) and banded (P =0.000).Glucocorticoid (P =0.000) and immunosuppressive agents (P =0.000) were commonly used in the treatment of DM-ILD.However,there was no significant difference in 90d mortality between the two groups (P ＞ 0.05).Conclusions IPF is more common in the elderly,men and smokers,and its high-resolution CT mostly shows grid shadow and honeycomb shadow,distribution is diffuse.DM-ILD often has cough symptoms,and its high resolution CT is mostly plaques and streaky shadows.Glucocorticoids and immunesuppressants are commonly used in DM-ILD,but there is no significant difference in 90-day mortality between them.

Expressions of serum TSLP, SAA, and CRP in COPD patients / 中国医师杂志

Objective To value different stages of chronic obstructive pulmonary disease (COPD) patients with the detection of the levels of serum thymic stromal lymphopoietin (TSLP),serum amyloid A (SAA),and C-reactive protein (CRP).Methods A total of 33 patients with COPD during and after hospitalization and 16 healthy controls were enrolled in the study from the 3rd affiliated hospital of SYSU.Differences and correlations of the level of serum TSLP,SAA and CRP were analyzed to value the veracity of those factors in different stages of COPD.Results The levels of CRP and SAA were higher in acute exacerbation of COPD (AECOPD) group than stable COPD group,TSLP was lower in the AECOPD group than the healthy control group (P ＜ 0.05).CRP had a positive correlation with SAA (correlation r =0.546,P =0.000),CRP [area under curve (AUC) =0.797] and SAA (AUC =0.815),and they were statistically significant in identity of different stages of COPD (P ＜ 0.05).Conclusions Serum TSLP level is decreased in acute exacerbation phase of COPD.CRP and SAA are increased in AECOPD.SAA is more confident in identity of different phases of COPD.

Advances in brain network model of Parkinson's disease tremor mechanism / 中国综合临床

Objective Parkinson's disease( PD) is a common chronic neurodegenerative disease,with four major symptoms of resting tremor, muscle rigidity, slow motion and postural balance disorder?The pathogenesis of Parkinson's disease is still unknown?A large number of studies suggested that may be the result of the interaction of genetic factors,environmental factors,aging,immune factors,specifically involved in oxidative stress,mitochondrial damage,and other mechanisms?There were 50% patients characterized by tremors,tremor is the most difficult symptoms to treat of PD, but the mechanism is still under controversial, so it ’ s of great significance to understand the generation of PD tremor, which helps to promote the clinical treatment and diagnosis.

Analysis of serum carcinoembryonic antigen for advanced non-small cell lung cancer chemotherapy curative effect / 中国医师杂志

Objective To explore clinical value of serum carcinoembryonic antigen (CEA) rate in early evaluation of imaging tumor efficacy and prognosis of disease control for advanced non-small cell lung cancer (NSCLC) before and after the second course of chemotherapy, and provide the basis for clinical adjustment chemotherapy regimens.Methods Patients in the Third Affiliated Hospital of Sun Yat-sen University were randomly collected in January 2007-September 2014 during the pathological diagnosis of 130 cases for advanced NSCLC, who had an elevated serum CEA level, including pre-chemotherapy and prochemotherapy, were collected.Receiver operating characteristic (ROC) was used to evaluate efficacy of CEA change in evaluation of early disease control (DC).SPSS 18.0 was used to analyze the relationship between CEA change and prognosis.Results After two chemotherapy cycles, the area under the ROC curve was 70.6％.When the cut-point of the change rates of CEA levels was 2.05％ , the Youden index reaches the maximum.Adenocarcinoma group and squamous cell carcinoma patients after 2 courses of CEA change rate evaluation, which area under the ROC curve was 72.0％ (95％ CI :61.4％ ～ 82.5％), and 70.1％ (95％ CI:45.8％ ～94.5％).Survival was analyzed with the Kaplan-Meier method, which showed the change rates of CEA levels were all the influencing factors of progression-free survival (PFS) in patients with advanced NSCLC(P ＜ 0.05).While the change rates of CEA levels were not predictive overall survival (OS) (P =0.715).Conclusions It prompts effective chemotherapy, and patients have the extended PFS, when CEA levels before and after chemotherapy dropped to a certain degree.

NSC-640358 acts as RXRα ligand to promote TNFα-mediated apoptosis of cancer cell

Retinoid X receptor α (RXRα) and its N-terminally truncated version tRXRα play important roles in tumorigenesis, while some RXRα ligands possess potent anti-cancer activities by targeting and modulating the tumorigenic effects of RXRα and tRXRα. Here we describe NSC-640358 (N-6), a thiazolyl-pyrazole derived compound, acts as a selective RXRα ligand to promote TNFα-mediated apoptosis of cancer cell. N-6 binds to RXRα and inhibits the transactivation of RXRα homodimer and RXRα/TR3 heterodimer. Using mutational analysis and computational study, we determine that Arg316 in RXRα, essential for 9-cis-retinoic acid binding and activating RXRα transactivation, is not required for antagonist effects of N-6, whereas Trp305 and Phe313 are crucial for N-6 binding to RXRα by forming extra π-π stacking interactions with N-6, indicating a distinct RXRα binding mode of N-6. N-6 inhibits TR3-stimulated transactivation of Gal4-DBD-RXRα-LBD by binding to the ligand binding pocket of RXRα-LBD, suggesting a strategy to regulate TR3 activity indirectly by using small molecules to target its interacting partner RXRα. For its physiological activities, we show that N-6 strongly inhibits tumor necrosis factor α (TNFα)-induced AKT activation and stimulates TNFα-mediated apoptosis in cancer cells in an RXRα/tRXRα dependent manner. The inhibition of TNFα-induced tRXRα/p85α complex formation by N-6 implies that N-6 targets tRXRα to inhibit TNFα-induced AKT activation and to induce cancer cell apoptosis. Together, our data illustrate a new RXRα ligand with a unique RXRα binding mode and the abilities to regulate TR3 activity indirectly and to induce TNFα-mediated cancer cell apoptosis by targeting RXRα/tRXRα.

Assessment of preoperative lung function test in predicting the risk of postoperation pulmonary complications in non chest operation patients with chronic obstructive pulmonary disease / 实用医学杂志

Objective To observe the role of preoperative lung function test in predicting the risk of postoperation pulmonary complications in patients with chronic obstructive pulmonary disease (COPD) accepting non chest operations. Methods 80 patients accepting non-invasive chest operations during Oct 2006 to May 2013 in the third affiliated hospital of SYSU were studied retrospectively. All the patients accepted lung function test 1 week before operation. Based on the lung function records, patients were divided into 2 groups. 40 of them in COPD group, 40 in control group. The incidence rate of postoperation pulmonary complications in different group and the relationship between the severity of lung function decreasing and the rate of postoperation pulmonary complications were investigated. The differences of the American Society of Anesthesiologists (ASA) Physical Status Classification, body mass index, smoking index, length of stay, hospitalization costs between the 2 groups were also studied. Results The incidence rate of postoperation pulmonary disease in COPD group was 30% (12/40) while the rate in control group was 12.5% (5/40), the statistic difference was significant (P = 0.046). There was remarkable relationship between the severity of lung function decreasing and the rate of postoperation pulmonary complications(P=0.005), patients with mild to moderate lung function decreasing would be safer in operation, but patients with severe lung function decreasing would be in high risk(r=-0.451). Patients in COPD group were older than the control group, but there were no significant difference on body mass index, smoking index, length of stay, hospitalization costs between the 2 groups (P > 0.05). There was no relationship between ASA physical status classification and postoperation pulmonary complications. Conclusion Incidence of postoperation pulmonary complications in patients with COPD is high, which mainly manifests as pneumonia. It was important to test the lung function before non-invasive chest operations, especially in patients with COPD(P>0.05).

In Vitro Study on Morusin Regulating Cell Cycle Arrest and Inhibiting Cell Proliferation of ;HCT116 Cells in Colorectal Cancer / 中国中医药信息杂志

Objective To investigate the effects of Morusin on cell line proliferation, cell cycle and cell apoptosis of colorectal cancer HCT116 cell;To discuss its mechanism. Methods HCT116 cells were treated with different concentrations of Morusin for 72 h. Cell proliferation was detected by CCK-8 assay, and cell growth inhibition rate and IC50 value were calculated. HCT116 cells were treated with 25.4, 50.8 μmol/L Morusin for 24 h, 48 h and 72 h. Cell morphology was observed under the microscope, and cell proliferation was detected by CCK-8 assay. After HCT116 cell line was treated with 25.4μmol/L Morusin for 24 h, cell cycle phase distribution was detected by flow cytometry and the cell apoptosis was detected by TUNEL assay under the fluorescence microscope. Post-intervention protein expressions were detected by Western Blot. Results The inhibitory effects of Morusin on the proliferation of HCT116 cell line was concentration/time dependent and IC50 value at 72 h was 25.4μmol/L;Morusin induced the cell cycle arrest at G0/G1 phase and G2/M phase, but there was no induction of cell apoptosis;Morusin significantly decreased the expression ofβ-catenin and its target c-Myc, and downregulated the expressions of cyclinD1 and cyclinB1, which were involved in cell cycle regulation. Conclusion Morusin can inhibit HCT116 cell cycle and the proliferation of colorectal cancer cells. Its mechanism might be realized by suppressing the activity ofβ-catenin pathway and reducing the protein expressions of cyclinD1 and cyclinB1.

Effect of Xiaotan Sanjie Recipe on Proliferation and Apoptosis of HCT116 Cell and Expression of Caspase3 Protein / 中国中医药信息杂志

Objective To investigate the effects of Xiaotan Sanjie Recipe (XTSJR) on the proliferation and apoptosis of colorectal cancer cell;To study its relevant mechanism. Methods The original XTSJR aqueous solution was lyophilized, weighted, and dissolved in cell culture and stored. HCT116 cell line was treated with different concentrations of XTSJR for 72 h, and the cell proliferation was detected by CCK-8 assay. XTSJR treated HCT116 cell line with the concentration of 0.94 mg/mL and 1.88 mg/mL for 24 h, 48 h, 72 h, and the cell proliferation was detected by CCK-8 assay. HCT116 cell line was treated with different concentrations (0.24, 0.47, 0.94, 1.88 mg/mL) of XTSJR for 72 h. The cell apoptosis was detected by TUNEL assay under the fluorescence microscope, and the post-intervention expression of Caspase3 protein was detected by Western blot. Results The inhibitory effects of XTSJR on the proliferation of HCT116 cell line was concentration-time dependent. The IC50 value at 72 h-time point was 0.94 mg/mL. Medicine concentration and the treated time have interactive contribution to the inhibitory effect. XTSJR induced the cell apoptosis. The apoptosis rate increased with the increasing medicine concentration. There was statistically significant difference compared with the control group ( P<0.01). After treatment the expression of Pro-Caspase3 decreased, while the expression Cleaved Caspase3 protein increased. Conclusion XTSJR inhibits the proliferation of HCT116 cell line and induce apoptosis. Its mechanism might be related to the activity of Caspase3 protein.

Combination therapy with single inhaler of long-acting β2-adrenoceptor agonists/inlaled corticosteroids compared with higher dose of inhaled corticosteroids in asthmatic patients / 中国基层医药

Objective To provide a quantitative summary estimate on the efficacy and safety measures of the combination therapy.Methods We searched databases(Medline and Embase)from January 1997 to December 2009 using‘ Fluticasone and salmerterol' or‘ Seretide' or‘ Advair' or‘ budesonide/formoterol' or‘ Symbicort Turbuhaler' in combination with ‘ Randomised controlled trial'.The databases of GlaxoSmithKline Clinical Trial Register and Cochrane Controlled Trials Register,or relevant original studies and review articles were approached for additional studies or details of all relevant studies.Results Morning peak expiratory flow(PEF),evening PEF and clinic FEV1 were 17.59L/min,14.95L/min and 0.08L/min higher with combination therpy than with increasing ICSs by two fold or more at endpoint,respectively.The risk of asthmatic exacerbation was reduced in the combination therpy group compared with the increased doses of ICS groups,with OR being 0.61(95 ％ CI 0.53 ～ 0.70,P ＜ 0.01).Significantly increases in the percent of symptom-free days 6.30(95％ CI 3.52 ～9.10),asthma-control days 9.49(95％ CI 4.74 ～14.25)and relieve-free days 6.59(95％ CI 6.10 ～ 7.08)were observed in patients treated with ICS/LABA compared with increased doses of ICSs at endpoint.Reduction in reliever medication use(inhalations/day)0.22(95 ％ CI 0.11 ～0.33)with significant difference was also observed at endpoint.Conclusion Combination products of ICS/LABA were more effective than a high dose of ICSs in improving lung function,reducing asthmatic exacerbation and use of reliever medication and improving control of asthma.

The impact of Pan3CSK4 on the platelet activation and the expression of TLR2 on it / 中华微生物学和免疫学杂志

Objective To investgate role of TLR2 in the activation, the innate immune and inflammation of human platelets. Methods Human washed platelets were separated from healthy people(n=5) and were stimulated with different concentrations(1μg/ml, 5μg/ml, 10μg/ml) of TLR2 agonistPam3CSK4(a synthetic bacterial lipoproteins). Then the platelet aggregation rate, the expression of CD62p and TLR2 on the platelet surface were measured. Results The platelet aggregation rate were (28.32±5.67)%, (52.56±8.54)% and (76.24±11.23)%, respectively, at concentration of 1μg/ml, 5μg/mland 10μg/ml of Pam3CSK4, more than (12.83±2.43)% at 0μg/ml of it. In addition, the expression of CD62p were (18.45±2.66)%, (22.45±2.04)%, (29.53±4.08)%, respectively at above concentration of Pam3 CSK4, more than (11.20±1.67)% of CD62p at control group(P<0.01). The expression of TLR2 was not significantly increased at a lower concentration of Pam3CSK4(1μg/ml) with (16.85±6.10)% compared with(10.81±3.99)% at the control group. However, it were (21.15±9.90)% and (22.52±9.26)%, respectively, at a higher concentration(5μg/ml, 10μg/ml)more than(10.81±3.99)% at the control group(P<0.05). Conclusion Pam3CSK4 induce aggregation, activation and the up-regulation of TLR2 of platelet by stimulating TLR2 receptor of it. Thereafter, TLR2 play an important role in the innate immune of platelet.

Predication of Wells and Revised Geneva Scores for Pulmonary Embolism / 中山大学学报(医学科学版)

[Objective] To reduce misdiagnosis and underdiagnosis rate of pulmonary embolism,the prediction of the revised Geneva score and Wells score for pulmonary embolism were compared and analyzed by receiver operating characteristic curves.[Methods] Sixty-five cases with suspected pulmonary embolism (PE) were collected in the Third Affiliated Hospital of SUN Yat-sen University from January 1998 to October 2008.Of which 44 cases with PE were clinically confirmed.Relevant clinical data were recorded,summarized and the analysis variables were input to SPSS11.0 for statistical analysis.ROC curves was used to evaluate the probability of PE predicted by the Wells and the revised Geneva scores.[Results] Twenty-four patients had a low clinical probability of PE (Wells score ＜ 2 points ),of which 8 (33.3%) had proven PE.The prevalence of PE was 87.2% in the 39 patients with intermediate probability (2-6 points) and 100% in the 2 patients with high probability (＞ 6 points) (P ＝ 0.000).The confirmed PE was 22.2% in the 18 patients with a low probability (Geneva score 0-3 points),82.1% (32/39) in intermediate probability (4-10 points),100% (8/8) in high probability (score ≥11 points) (P ＝ 0.000).The area under curve (AUC) of the ROC curve in the Wells and Geneva scores was 0.785 ± 0.060 and 0.900 ± 0.038,respectively (P ＝ 0.000).The optimal cutoff value was 2 points in the Wells score and 6.5 points in the Geneva score.The Wells score more than 2 points predicted PE with a sensitivity of 81.8% and specificity of 76.2%.The Geneva score more than 6 points predicted PE with a sensitivity of 72.7% and specificity of 100%.The comparison of the area under curve between the Wells and the Geneva score had a significant difference statistically (P ＜ 0.05).[Conclusion] The Wells score and the revised Geneva score are beneficial to predict pulmonary embolism.The revised Geneva score is roughly superior to the Wells score both in sensitivity and specificity.

Prokaryotie expression of Staphylococcus aureus Panton-Valentine leukocidin and its cytolytic activities to human polymorphonuclear neutrophils' / 中国病理生理杂志

AIM:Panton-Valentine leukocidin(PVL)is a pore-forming toxin secreted by Staphylococcus aureus epidemiologieally associated with the often-lethal necrotizing pneumonia.Until now,the mechanisms of pathogene-sis of PVL leading to the fatal pulmonia remains undefined and also acquired plenty of the toxins is difficult.In the present study，we obtain recombinant staphylococcal F and S components of the Panton-Valentine leukocidin by gene engineering and evaluate its biological activity in vitro,which provides an experimental basis for the further studies of its biological func-tion and its toxicity in pneumonia.METHODS:The full-length of F and S components of PVL gene amplified from the strain of Staphylococcus aureus DNA by hiSh-fidelity PCR was cloned into prokaryotic expression vector pET22b(+),and the vector was transformed into BL21(DE3)plysS to construct a prokaryotie expression system.The integrity of the opening-reading frame of each construct was verified by DNA sequencing.The recombinant PVL(rPVL)was induced by1.0 mmol/L IPTG.The expressed products were identified by SDS-PAGE and the fusion proteins(6His-LukS-PV and 6His-LukF-PV)were purified from lysates of transfeeted E.coli cells by affinity chromatography on nitrilotriacetic acid columns.The eytolytie activity was tested by incubation of rPVL with human polymorphonuclear neutrophils(PMNs)in vitro.RESULTS:The nueleotide sequence of the cloned PVL gene was the same as that of reported in GenBank.E coli BL21(DE3)plysS containing recombinant vectors grow at 37℃causes some proteins to accumulate as inclusion bodies.while incubation at 30℃led to a significant amount of soluble active proteins which accounted for about 31.7％ of the total bacterial protein.The relative molecular weight showed on SDS-PAGE profile was consistent with the expected value which the LukS-PV protein was about 34 kD.and the LukF-PV protein was about 35 kD.The purified rPVL was obtained and its cytolytic activity to PMNs was demonstrated.CONCLUSION:The genes of 1ukS-PV and lukF-PV are successfully cloned into plasmid pET22b(+)and expressed in E coli respectively.which provide a basis for analyzing the toxicity related to the diseases and further studies about the pathogenesis of PVL.

Influencing factor of mechanical ventilation time in patients with chronic obstructive pulmonary disease / 中华急诊医学杂志

Objective To study influencing factor of mechanical ventilation (MV) time in patients withchronic obstructive pulmonary disease (COPD). Method Totally 128 patients with COPD and respiratory failurerequiting ventilation support were retrespectively investigated. The clinical characteristics of patients before and af-ter intuhation during the respiratory intensive care unit (RICU) stay were recorded and analyzed, t- test, X2 testand stepwise logistic regression analysis were used for statistical analysis. Results In the 128 patients, 61%,20%, and 9% of the patients required MV longer than 7, 14 and 21 days, respectively. There were no significantdifferences in the history of COPD, smoking, lung function, and complications between patients with MV>7 d, 14d, 21 d and patients with MV<7 d, 14 d, 21 d. Multiple regression analysis showed APACHE Ⅱ score (OR:2.3; 95% Ca: 1.2-5.7, P = 0.02) was an independent factor for MV > 7 days, while shock (OR: 0.7;95% CI: 1.0-1.9, P = 0.04) and decreased serum albumin (OR: 0.4, 95% CI: 0.2-0.8, P = 0.003)were an independent factors for MV > 21 days. The ventilator-associated pneumonia (VAP) was the most impor-rant risk factor for the time of MV. Conclusions APACHE Ⅱ score, serum albumin levels, hock and VAP arethe main factors affecting MV time in patients with COPD.

Comparison of different HPV DNA extraction methods with serum samples from cervical cancer patients / 中国癌症杂志

Background and purpose:For the past few years, HPV DNA has been detected in the peripheral blood in the patients with cervical cancer and believed to be a promising tumor marker, but because the concentration in the patients' serum was extremely low, it made it difficult to detect the circulating HPV DNA. In order to find a way to improve the sensitivity of the assay, this study compared and evaluated three methods that are currently being used to measure HPV DNA in the extraction from serum of cervical cancer patients. Methods:51 patients were pathologically proved to be cervical cancer and enrolled into the study. DNA from their sera was extracted by three methods:(1) Phenol-chloroform extraction, (2) UNIQ-10 collumn virus DNA kit(SANGON,Shanghai), (3) QIAamp MinElute Virus spin kit(QIAGEN,Germany). Then the HPV DNA was quantitated by PCR using GP5+/GP6+ primers.Results:Either fresh or short-term storage sera has been used The positive rates were 14.3%, 5.7%, and 57.1% with three assays, respectively. But when long-term storage samples were used to quantitate, the positive rates were low regardless of the methods being used.Conclusions:QIAamp MinElute Virus spin kit was the most sensitive for the content of serum HPV DNA, it could improve the positive rate for the assay if the serum was not stored for long time.