Objective To understand the effects of 17?-estradiol on MCF-7 cell proliferation and the regulation of estrogen receptor-related recepto(rERR?).Methods MCF-7 cells were treated with 17?-E2 at the doses of 10-12,10-11,10-10,10-9,10-8,10-7 and 10-6 mol/L for 24 h.Dimethyl sulfoxide were used as the solvent control.MTT method was used to determine inhibitory rate of MCF-7 proliferation,and the cells were treated with 17?-E2 at the doses of 10-10,10-9,10-8 and 10-7 mol/L for 24 h.RT-PCR method was used to detect the expression level of ERR?.Results Cell proliferation were promoted by exposure to 17?-E2 at the doses of 10-12,10-11,10-10,10-9,10-8,10-7 and 10-6 mol/L,the proliferation rate were 112.09%,122.09%,123.42%,120.46%,124.60% and 109.23% respectively,however,cell growth was inhibited at 10-6 mol/L of 17?-E2.The expression of ERR? in MCF-7 cells was upregulated at the doses of 10-10,10-9,10-8 and 10-7 mol/L when cells were treated with 17?-E2 for 24 h.Conclusion In certain dosage range,cell proliferation and expression of ERR? can be promoted by 17?-E2,which suggests that ERR? should play an important role in the process of MCF-7 cells growth.

Objective The coronary slow flow phenomenon (CSFP) is a coronary artery disease with a benign course,but its pathological mechanisms are not yet fully understood.The purpose of this controlled study was to investigate the cellular content of blood in patients diagnosed with CSFP and the relationship of this with coronary flow rates.Methods Coronary angiographies of 3368 patients were selected to assess thrombolysis in myocardial infarction (TIMI) frame count (TFC) values.Seventy eight of them had CSFP,and their demographic and laboratory findings were compared with 61 patients with normal coronary flow.Results Patients'demographic characteristics were similar in both two groups.Mean corrected TFC (cTFC) values were significantly elevated in CSFP patients (P ＜ 0.001).Furthermore,hematocrit and hemoglobin values,and eosinophil and basophil counts of the CSFP patients were significantly elevated compared with the values obtained in the control group (P =0.005,P =0.047,P =0.001 and P =0.002).The increase observed in hematocrit and eosinophil levels showed significant correlations with increased TFC values (r =0.288 and r =0.217).Conclusion Significant changes have been observed in the cellular composition of blood in patients diagnosed with CSFP as compared to the patients with normal coronary blood flow.The increases inhematocrit levels and in the eosinophil and basophil counts may have direct or indirect effects on the rate of coronary blood flow.

Objective:To assess effect of detection of plasma N terminal pro brain natriuretic peptide (NT‐proBNP) and serum cystatin C (Cys C) combined Global Registry of Acute Coronary Events (GRACE) score on heart func‐tion and prognosis in patients with acute coronary syndrome (ACS) .Methods :According to GRACE score ,a total of 136 ACS patients were divided into low risk group (n=29) ,intermediate risk group (n=39) and high risk group (n=68) .Serum Cys C level and plasma NT‐proBNP level were measured in all groups .Incidence rate of major ad‐verse cardiovascular events (MACE) within three and six months was counted .Results:Among ACS patients ,com‐pared with low risk group ,there were significant rise in levels of NT‐proBNP [ (165.80 ± 51.62) ng/L vs .(193.13 ± 74.64) ng/L vs .(985.45 ± 152.69) ng/L] and Cys C [ (0.83 ± 0.38) mg/L vs .(0.9 ± 0.25) mg/L vs .(1.23 ± 0.23) mg/L] ,left ventricular end‐diastolic diameter [six months: (50 ± 3) mm vs .(55 ± 3) mm vs .(59 ± 5) mm] ,significant reduction in left ventricular ejection fraction [LVEF ,six months: (55 ± 7)% vs .(49 ± 5)% vs . (40 ± 7)% ] ,and significant rise in incidence rate of MACE (six months:2.94% vs .9.55% vs .30.88% ) ,and a‐bove indexes in high risk group were significantly higher than those of intermediate risk group except LVEF signifi‐cantly reduced , P<0.05 or <0.01 ;Pearson correlation analysis indicated that NT‐proBNP and Cys C levels were positively correlated with GRACE score (r=0.72 , P<0.05 ; r=0.65 , P<0.05) respectively .Conclusion:NT‐proBNP and Cys C level detection combined GRACE score could exactly response heart function and prognosis .

Objective To investigate the characteristics and mechanisms of attentional bias in anxiety sensitivity individuals.Methods By using Anxiety Sensitivity Index (ASI),23 participants were included in the high score group and 20 participants were included in the low score group.Then,2 (between-subject factor:the high and low score group) ×2 (within-subject factor:the positive and negative picture) mixed design experiments were adopted.Emotional faces picture pairs were chosen as stimuli.Picture pairs were presented 100 ms in experiment 1 and 1 250 ms in experiment 2.Dot-probe task was adopted to inspect the attentional bias and the response time and correct rate were recorded.Results Experiment 1 implied the main effect of type of pictures was found in mixed design experiments(F(1,41)=4.40,P＜0.05).The reaction time of two groups in positive pictures was greater than zero((12.22±30.24) ms vs (10.07±21.55) ms).It showed input effect to positive pictures.An input effect due to the reaction time of the high score group was greater than zero to negative pictures((4.81± 17.88)ms),while the low score group tended to avoid the negative pictures ((-6.81 ±21.33) ms).Experiment 2 implied positive score was not significant between two groups (F(1,41) =0.29,P＞0.05).And positive score showed the attentional bias to some certain extent.Significant outcome was found by negative score between two groups (F(1,41) =6.41,P＜0.05).It implied that the high score group tended to avoid the negative pictures and the low score group had the tendency of input effect.Conclusion At the initial stage of attention,anxiety sensitivity individuals had the attentional bias to negative emotional faces and avoidance in the late stage of attention.It suggests that the attentional bias of anxiety sensitivity individuals may have an important effect on the development of the mental disorders.

OBJECTIVE:To evaluate the rational use of antimicrobials in 160 cases undergoing orthopaedic operations.MET_HODS:To analyse and evaluate the use of antimicrobials in 160 cases undergoing orthopaedic operations in 1999 in respect to the cost of antimicrobials related cost ratio,usage,clinical efficacy,and adverse drug reactions.RESULTS:The cost of antimicrobials per person()was 1 676.55 yuans and average day of treatment()was (7.3?3.4)d.151 patients healed by first intension.9 patients recovered in delayed healing.The ratio of the total cost,cost of drugs and cost of antimicrobials was 1∶0.38∶0.14.CONCLUSION:The use of the antimicrobials in 160 cases undergoing orthopaedic operations was reasonable.

Objectives To detect the clinical significance of high sensitive C-reactive protein (hs-CRP) and immune function in children with Mycoplasma pneumoniae pneumonia (MPP). Methods 103 children with MPP, 47 cases of systemic inflammatory response syndrome (SIRS group), 56 cases of non-systemic inflammatory response syndrome (non-SIRS group) were recruited. 26 healthy children served as the control group. ELISA was used to detect the level of serum hs-CRP, immune in-dexes, IgG, IgA, and IgM, Cellular immune CD3+, CD4+, CD8+, CD4+/CD8+. Results The level of serum hs-CRP、IgG、IgM and CD8+in control group were significantly lower than those in non-SIRS group and SIRS group (P<0.05). The level of IgA、CD3+, CD4+, CD4+/CD8+in control group were significantly higher than those in non-SIRS group and SIRS group (P<0.05). The level of serum hs-CRP、IgG in SIRS group were significantly higher than those in non-SIRS group (P<0.05). The level of IgA、CD3+、CD4+、CD4+/CD8+in SIRS group were significantly lower than those in non-SIRS group. There was no significant difference in non-SIRS group and SIRS group of IgM and CD8+(P>0.05). The level change of serum hs-CRP were positively related with IgG (r=0.66,P=0.001) and were negatively related with IgA、CD4+、CD4+/CD8+(r=0.79, 0.67, 0.82, P all were<0.05) in chil-dren with MPP. Conclusion Children with MPP have Immunity function( including humoral immunity and cellular immunity) disorder which is related to the disease status. The level of hs-CRP could be an anpation index for the severity and immune func-tion of the children with MPP.

Objective: To evaluate diagnostic value of three noninvasive examinations for coronary heart disease (CHD).Methods:A total of 500 subjects, who were suspected of CHD, first received diagnostic coronary angiography (CAG) and hospitalized in our department from May 2014 to May 2015, were selected.According to CAG results, they were divided into non-CHD control group (n=106), single vessel coronary disease group (n=199), double-vessel coronary disease group (n=95) and multi-vessel coronary disease group (n=100, ≥three vessel disease).Besides CAG, all subjects accomplished one of following examinations at least: (1) 24h dynamic ECG (Holter);(2) real-time three-dimensional echocardiography(RT-3DE);(3) radionuclide myocardial perfusion imaging (RMPI).Sensitivity, specificity and accuracy of these three examinations in diagnosing CHD were evaluated.Results: With CAG as the gold standard, compared with Holter and RT-3DE, there were significant rise in sensitivity(68.4%, 69.0% vs.92.9%), specificity (62.9%, 81.4% vs.88.5%) and accuracy (67.1%, 71.2% vs.91.9%) of RMPI (P<0.01 all), only specificity of RT-3DE was significantly higher than that of Holter, P=0.019.Conclusion:Noninvasive examination can be used as important method diagnosing CHD, which are important measures for noninvasive diagnosing and assessing CHD.Accuracy, sensitivity and specificity of RMPI are high, which is worth extending.

New Chemical Entities (NCEs) development is a systematic long-term project that involves multiple disciplines. The translation research will help to build an advanced R&D system from the basic laboratory research, preclinical studies and clinical evaluation to clinical application of drug, for the purpose of shortening the R&D cycle and accelerate the launch of new drugs. In new drug R&D and its clinical application, drug disposition (absorption, distribution, metabolism, excretion, ADME) properties are important criteria for assessing drug-likeness of candidates. ADME evaluation of NCEs plays an important role in the translation research throughout innovative drug R&D process. Therefore, ADME evaluation at the early stage of drug design and development will be helpful to improve the success rate and reduce costs, and further access to safe, effective drugs.

Objective:To explore the expectations of different groups, including the vice president in charge of hospital infection, hospital infection management professionals, nursing managers, and department directors, on the core competence of head nurses in hospital infection prevention and control.Methods:Using the phenomenological research method, purposive sampling method was used to conduct in-depth semi-structured interviews with 25 interviewees from 5 tertiary general hospitals in Hangzhou City, Zhejiang Province, including vice presidents in charge of hospital infection, hospital infection management professionals, nursing managers, department directors, clinical staff and logistics supervisors. A total of 25 interviewers conducted in-depth semi-structured interviews, and the collected data were analyzed by Colaizzi′s 7-step analysis method.Results:Four themes were extracted, including the expectation of the head nurse′s infection control target management ability, the expectation of the head nurse′s infection control professional knowledge ability, the expectation of the head nurse′s infection control clinical practice ability, and the expectation of the head nurse′s infection control influence.Conclusions:In the sensory control management of the department, head nurses should have strong infection control target management ability, continue to learn and update the infection control knowledge and concepts, improve the clinical infection control practice ability, properly authorize, reasonably motivate and improve the infection control management. Team execution ability, create a good atmosphere of department sense control, and promote the development of infection control work.

Objective: To explore perceived social support levels of vocational school students and associated factors, so as to provide a basis for the fine tuned construction of social support networks for vocational school students. Methods: Adopting a combination of multi stage cluster sampling and convenience sampling method, a sample of 11 767 vocational school students in Shanghai City and Jiangsu Province were selected to conduct two surveys (November 2021 and November 2022) by using a self administered electronic questionnaire regarding personal, family, school information and the Child and Adolescent Social Support Scale (CASSS). Correlates were analyzed by generalized linear estimating equations (GEE). Results: The total perceived social support scores in percentage at baseline and follow up survey were (66.13±20.46) and (67.65±21.18). The results of GEE showed that in terms of personal characteristics, girls had higher emotional support and evaluative support scores than boys ( B=0.60, 0.68, P < 0.05 ); extraversion, non-smoking, non-drinking, exercising ≥1 time per week, and better quality of sleep were positively correlated with the total score and the different types scores of precieved social support, and time spent on the Internet >2 h/d was negatively correlated with the total score and the different types scores of precieved social support ( B=1.03-4.49, -4.04--0.58, P < 0.05 ). In terms of family characteristics, parents not in marriage and living with (external) grandparents were negatively correlated with the total score and different types scores of percieved social support, while family characteristics such as satisfaction with family income (average, satisfactory, very satisfactory) and parents education level of junior high school and above were positively correlated with the total score and the different types scores of precieved social support ( B=-1.34--0.37, 0.57-2.37, P <0.05). In terms of school characteristics, without experience of bullying in school and the number of same sex or opposite sex friends >1 were positively correlated with the total score and different types scores of perceptual social support, and without serving as an officer of a student organization was negatively correlated with the total score and the different types scores of precieved social support ( B= 1.21- 5.04, -2.00--0.76, P <0.05). Conclusions The levels of overall and different types of precieved social support among vocational school students need to be improved. According to individual, family, and school related factors of precieved social support can help to target the improvement of students precieved social support level.