Objective An analytical method for rapid screening and confirmation of multiple pesticide residues in vegetable and fruit was established according to GB 2763-2014 national food safety standard-maximum residue limits for pesticides in food,using ultra performance liquid chromatography-Q-time of flight mass spectrometry (UPLC-Q-TOF-MS).Methods Pesticide residues in vegetable and fruit were screened by comparing the accurate mass,isotope distribution and abundance in the accurate mass database,and confirmed by comparing with the spectra in the spectra library or by the spectral analysis method.Results The method was verified by spiked samples,and all pesticides were detected at the addition level of 10.0 and 50.0 μg/kg.The recovery of 90％ of the pesticides was in the range of 70％-120％,with relative standard deviation (RSD) ≤ 20％ (n =5).The method was applied to screen pesticides in 30 samples of vegetables and fruits.Twenty-seven pesticides were found and 2 samples exceeded the limit.Conclusion The method was sensitive,accurate and reproducible.Hundreds of pesticides in GB 2763-2014 could be screened and confirmed in a short period of time even without standard substance.It could provide an effective method for food safety control.

Objective To investigate the expression levels of somatostatin (SST) gene in endometrial adenocarcinoma tissues and cell lines,and the effects of over-expression of SST gene on the proliferation and invasion of endometrial cancer cell line Ishikawa in vitro.Methods Tissue sections of normal endometrium,endometrioid adenocarcinoma and uterine papillary serous carcinoma were selected to detect the expressions of SST by immunohistochemical method.The total RNA was extracted from fresh specimens that were confirmed as endometrioid adenocarcinoma.According to FIGO staging,samples included G1 (7 cases),G2 (6 cases) and G3 (5 cases) of endometrioid adenocarcinoma.The SST expression levels were detected by real-time PCR.Three endometrial cancer cell lines,Ishikawa,HEC-1A and KLE,were selected and the expression levels of SST were detected by real-time PCR and Western blot assay.Transfection was performed with pLVX-SST and pLVX.The transfection efficiency was observed by fluorescence confocal microscopy.The protein levels of SST were detected by Western blot assay.The assays of CCK-8 and transwell were applied to examine variations in cell proliferation and invasion.Results Immunohistochemical results showed that SST expression was increased in endometrioid adenocarcinoma and uterine papillary serous carcinoma compared with that of normal endometrium.Real-time PCR showed that SST expression was significantly increased in G3 compared with that of G1 and G2 in endometrioid adenocarcinoma (P ＜ 0.05).No matter mRNA or protein,SST levels were significantly increased in endometrial cancer cell line KLE compared with those of Ishikawa and HEC-1A,and the expression levels of SST mRNA and protein were significantly increased in HEC-1A group than those of Ishikawa group (P＜0.05).The expression of SST protein was significantly higher in the group of Ish-SST after 2 generations compared with that of Ish-ctr group.There were no significant differences in cell proliferation and invasive ability after over-expression of SST between Ishikawa cell group and control group (P ＞ 0.05).Conclusion SST is highly expressed in poorly differentiated endometrial cancer cells.The proliferation and invasion are not increased after the over-expression of SST in Ishikawa cell line of endometrial cancer.

Objective To test the reliability and validity of the Chinese version of Profile of Fatigue Scale (PROF)among the patients with Sjogren′s syndrome. Methods The English version of PROF was translated into Chinese according to Brislin Translation Model. 107 patients with Sjogren′s syndrome were investigated to test its reliability and validity. Results The Cronbachαcoefficient , Guttman split-half coefficient, test-retest reliability and content validity of Chinese version of PROF were 0.976, 0.953, 0.872 and 0.875. Two factors were extracted by factor analysis and the cumulated variance was 80.75%. The structure of PROF was in line with the original scale. The criterion-related validity was 0.621 measured by comparing with visual analog scale of fatigue, and was -0.707 measured by comparing with vitality domain in the MOS item Short From Health Survey (SF-36). Conclusions The Chinese version of PROF has been proved to be reliable and valid. It can be used to measure the fatigue in Chinese patients with Sjogren′s syndrome.

Objective To investigate the expression of long non - coding RNA(lncRNA)in neonatal rats with hypoxic - ischemic brain damage(HIBD). Methods SD rats of 10 postnatal days were divided into the sham -operated control and the hypoxic - ischemic(HI)group. At 24 h after HI,the animals were sacrificed. HE staining was used to assess histopathological damage. Microarray was used to detect the expression of lncRNA and mRNA in hypoxic -ischemic and sham control brain. Real - time PCR was used to verify the microarray result. The differentially expressed mRNA was analyzed by gene ontology(GO),pathway and coding - noncoding RNA co - expression(CNC)network analysis. Results HE staining showed that cells in HI brains became swollen and disordered with ambiguous cell struc-ture. Microarray data demonstrated that 322 lncRNAs and 375 mRNAs were significantly altered in the neonatal brains following hypoxic - ischemic injury compared with sham control(P ﹤ 0. 05). The real - time PCR results agreed with those of the microarray. GO analysis showed that the most enriched biological process associated with the upregulated mRNA had response to wounding,whereas the biological process mostly enriched among the downregulated mRNA was so-matic stem cell division. Pathway analysis indicated that upregulated mRNA was primarily corresponded with cytokine -cytokine receptor interaction pathway and that downregulated mRNA mainly correlated to axon guidance pathway. CNC network analysis demonstrated that 177 lncRNAs were correlated to the expression of mRNA involved in inflammation and cell death(P ﹤0. 05). Conclusions HI injury significantly influences cerebral lncRNA and mRNA expression profiles in the neonatal rat brains. Deregulated lncRNAs might contribute to the pathogenesis of HIBD via interacting with mRNA.

Objective: To investigate the determinants affecting the heart rate deceleration capacity (DC) in patients with dilated cardiomyopathy (DCM). Methods: One hundred patients with DCM (DCM group) and 202 healthy subjects (control group) were respectively enrolled. Echocardiography and 24 hours electrocardiogram were performed in all subjects. DC value was compared between the two groups. Multiple regression analysis was made to evaluate the related determinants of DC ((age, sex, echocardiographic parameters including the left atrial diameter (LAD) and left ventricular ejection fraction (LVEF)). Results: (1) DC value was significantly lower in DCM group than in control group( (4.40±2.03) ms vs. (7.30±1.81) ms, P<0.01), prevalence of DC value≤4.5 ms was significantly higher in DCM group than in control group (62% vs. 6%, P<0.01). (2) DC value in the DCM group decreased in proportion to increasing LAD dimension, DC value was (5.60±2.04) ms, (4.50±2.07) ms and (3.60±1.62) ms (P<0.05) in DCM patients with LAD≤40 mm, 40 mm50 mm, respectively. (3) DC value in the DCM group was negatively related to the LAD (r=-0.366, P<0.01), positively related to the LVEF (r= 0.241, P<0.01), but not related with age and sex. Multiple factors regression analysis showed that increased LAD was related to the reduced DC values independtly. Conclusion DC value of the patients in the DCM group is decreased, which indicate the decrease of the vagus nerve tension, and increased LAD is related to the reduced DC value independtly in DCM patients.

Objective To compare the differences of optic nerve head (ONH) parameters and the thickness of circumpapillary retinal nerve fiber layer (CP-RNFL) between acute Vogt-Koyanagi-Harada syndrome (VKH) and acute central serous chorioretinopathy (CSC) patients.Methods Retrospective clinical case control analysis.This study included 38 eyes of 20 acute VKH patients (VKH group) and 37 eyes of 37 acute CSC patients (CSC group).Seventy five eyes of 57 normal healthy subjects,matching patients with age and gender,were collected as control group.The disc RPE angle,the thickness of average CP-RNFL,the nasal,superior,temporal and inferior quadrant CP-RNFL thickness,and ONH parameters including optic disc area,cup area,rim area,C/D area ratio,linear CD ratio (CDR),vertical CDR were measured by 3D-OCT.Analysis of variance was performed for comparison among three groups.Minimum significant difference t test was performed for comparison between two groups.Results The differences of ONH parameters between VKH group and CSC group:29 eyes of VKH group appeared retinal detachment next to disc,only 12 eyes appeared in CSC group.Twenty one eyes of VKH group appeared optic disc hyperemia while none in CSC group.The three groups' disc RPE angles were (138.62± 11.96)°,(154.09±5.85)° and (153.41 ±5.77)°.VKH group were significantly smaller than CSC group (t=-2.05,P=0.00) and control group (t=-1.68,P=0.00),while there was no significant difference between CSC group and control group (t=-1.88,P=0.72).The optic cup area and rim area were significantly bigger in VKH group than in CSC group (t=4.61,2.71;P=0.00,0.01),and the thickness of mean CP-RNFL,all quadrants of CP-RNFL were significantly thicker in VKH group than in CSC group (t=6.25,4.40,3.53,5.48,2.69;P=0.00,0.00,0.00,0.00,0.01).Conclusion Compared with the acute CSC,VKH patients are likely to appear retinal detachment next to disc,their disc RPE angles are smaller,their optic cup area and rim area are bigger,and their CP-RNFL thickness are thicker.

The initiative and enthusiasm of medical staff in teaching work are the sources of improving the quality of clin-ical teaching.Stimulating the teaching enthusiasm of clinical teachers is an important connotation of the sustainable and high-quality development of teaching hospital.This article aims to establish a point-based teaching performance evaluation system to evaluate clinical teachers,stimulate the enthusiasm of medical staff to participate in clinical teaching activities,and promote clin-ical standardization through teaching.

Objective To investigate the inhibitory effect of ethosuximide,an antiepileptic drug,on sevoflurane-induced emergence delirium in neonatal rats.Methods Twelve SD rats (17-23 g) at postnatal day 9-11 were randomly divided into ethosuximide group (4 mg/100 μl,intraperitoneal injection,n=6) and saline group (100 μ1,intraperitoneal injection,n =6).Then the pups were treated with 1％ sevoflurane for 10 minutes and agitated behaviors was observed using PAHBs scoring method for every 2 minutes.Ten more pups were randomly divided into two groups as previously described.Then the pups were treated with 1％ sevoflurane for 10 minutes and EEG power spectrum of frontal lobe was monitored for every 2 minutes.Results Both PAHBs scores and EEG power spectrum at 2 min,4 min,6 min,8 min and 10 min were significantly decreased in ethosuximide group when comparing with saline group under 1％ sevoflurane inhalation (P ＜ 0.05).Conclusion Ethosuximide can decrease frontal lobe EEG power spectrum in sevoflurane-induced agitated rats and inhibit sevoflurane-induced emergence delirium in neonatal rats.

Objective To investigate the bacterial resistance in nationwide and understand the distribution of bacterial and resistance trend.MethodsThe 6507 clinical isolates were collected from 19 hospitals in 17 cities.The susceptibility tests were performed using agar dilution method recommended by Clinical and Laboratory Standards Institute (CLSI) in central laboratory.The values of MIC50,MIC90 and MICrange were calculated by SPSS 17.0 and the susceptibilities of isolates to antimicrobial agents were determined by using CLSI (2010) guideline.Of all 6507 isolates,4691 strains were collected from target wards and 1816 were isolated from others wards.ResultsAmong 4691 strains,1156 were Gram-positive (24.6％ ) and 3535 were Gram-negative (75.4％).Based on the minimum inhibitory concentration results,the prevalence of methicillin resistant Stapylococcus aureus and methicillin resistant Stapylococcus epidermidis are 51.6％ ( 325/630 ) and 87.0％ ( 228/262 ) respectively.Staphylococci showing intermediate or full resistance to vancomycin were not observed. Coagulase negative Staphylococci showed 2.5％ (16/642)intermediate rate and 1.6％ ( 10/642 ) full resistance rate to teicoplanin,and showed 0.5％ ( 3/642 )resistance rate to linezolid.Antibiotic resistance rate of Enterococcus faecalis to ampicillin was 17.1％(19/111),while the resistance rate of Enterococcus faecium to ampicillin reached up to 85.0％(164/193).Three Enterococcus faecium were resistant to glycopeptides.The prevalence of penicillin resistance Streptococcus pneumoniae and penicillin intermediate Streptococcus pneumoniae were 41.2％ ( 145/352) and 37.2％ (131/352) respectively based on oral penicillin criterion,while the prevalence were 0.0％ (0/352) and 6.0％(21/352) based on vein to non-meningitis criterion.A vast majority of Enterobacteriaceae maintained high susceptibility to carbapenems,with resistance rate less than 2.0％.In addition,tigecycline,moxalactam,fosfomycin and amikacin displayed desirable antibacterial activity against Enterbacteriaceae,and resistance rates to these drugs were all less than 10.0％.For non-fermenting Gramnegative isolates,resistance rate of Pseudomonas aeruginosa and Acinetobacter baumannii to imipenem were 23.1％ ( 139/601 ) and 53.5％ (419/784) respectively.Resistance rate of Acinetobacter baumannii was much higher than that during the period 2007 - 2008.Colistin,tigecycline,minocycline and fosfomycin demonstrated good antibacterial activity against Acinetobacter baumannii in vitro.Conclusions Compared with MOHNARIN 2007 -2008year surveillance results, significant increase in resistance rate of Acinetobacter baumannii was demonstrated.Resistant strains to linezolid and tigecycline were found.Bacterial resistance has been a widespread problem in our country,which requires much more attention.

Objective To comapre and analyze the differences and commonalities of expression profiles of serum exosomal microRNA between patients with thyroid nodules and healthy persons at different iodine levels,and then provide evidence for screening early diag-nostic markers of thyroid nodules at different iodine levels.Methods The peripheral blood samples from 10 patients with thyroid nod-ules and healthy volunteers at different iodine levels were collected.Their serum iodine levels were measured by the arsenic cerium cat-alytic spectrophotometry.Serum exosomal microRNA were extracted and the expression levels of microRNA were determined by the high-throughput sequencing technology.The differential target genes were predicted and further performed Gene ontology(GO)analysis and Kyoto Encyclopedia of Genes and Genomes(KEGG)analysis.Results Compared with healthy volunteers,there were 6 downreg-ulated miRNAs in the patients with thyroid nodules at different iodine levels,namely miR-324-5p,miR-6511b-3p,miR-9903,miR-550a-3p,miR-5001-3p,and miR-3688-3p.Differentially expressed exosomal microRNA could regulate the MAPK signaling path-way,PI3K-AKT signaling pathway,VEGF signaling pathway,and NF-κB signaling pathway.Conclusion Six differentially expressed microRNAs is identified,which may serve as biological markers for the early diagnosis of thyroid nodules at different iodine levels.