Objective To investigate the association of neutrophil gelatinase-associated lipocalin(NGAL)and severity of coronary stenosis in patients with stable coronary artery disease(SCAD).Methods Totally 144 patients who underwent coronary angiography firstly due to suspected coronary artery disease were enrolled.The patients were divided into SCAD group(n=101)and non-CAD group(n=43),and the clinical data were compared.The SCAD group was fuether divided into three subgroups accoding to Gensini score:mild stenosis group(Gensini<16,n=32),moderate stenosis(16≤Gensini<30,n=33)and severe stenosis group(Gensini≥36,n=35).The clinical data of each group were compared.Odinal Logistic regression was used to analysis the influencing factors of severe stenosis.The receiver operating characteristic(ROC)curve was performed to evaluated the ability of NGAL in discriminating severe stenosis.Results Serum NGAL,high sensitive C-reactive protein(hs-CRP)level in SCAD group were higher than those in non-CAD group(P<0.01).Comparing with mild and moderate stenosis groups,NGAL and hs-CRP level were more higher in severe stenosis group(P<0.01).Multivariable Logistic regression analysis showed that NGAL and hs-CRP were independent risk factors for severe coronary stenosis(both P<0.05).Receiver operating characteristic(ROC)curve analysis showed that the areas under the curve of NGAL and hs-CRP were 0.771,0.702 respectively(both P<0.01).The difference between two AUCs was 0.069 which was insignificant(P>0.05).Conclusion Serum NGAL increased is closely associated with severe coronary stenosis in patients with SCAD,which has a certain ability of discriminating severity of coronary stenosis.

Objective To investigate the relationship between the levels of soluble growth stimulation expressed gene 2 protein (sST2), myoglobin (Myo), interleukin-6 (IL-6) in peripheral blood and cardiac function in elderly patients with diastolic heart failure (DHF) complicated with sarcopenia. Methods A total of 122 patients with DHF were divided into DHF complicated with sarcopenia group (60 cases) and DHF group (62 cases) according to the presence or absence of sarcopenia. In addition, 58 healthy healthy population with physical examination and 60 patients with sarcopenia alone were included in the control group and sarcopenia alone group, respectively. The levels of sST2, Myo, IL-6 and cardiac function indexes[left ventricular ejection fraction (LVEF), cardiac output (CO), heart rate (HR), stroke volume (SV), and cardiac index (CI)]were measured in each group. Pearson correlation analysis was used to analyze the correlations between sST2, Myo, IL-6 and each cardiac function index. Receiver operating characteristic (ROC) curves were drawn to analyze the diagnostic efficacy of sST2, Myo, IL-6 alone and their combination in diagnosing DHF complicated with sarcopenia. Results Compared with the control groupand the sarcopenia alone group, the levels of sST2, Myo, IL-6 and HR were increased, while LVEF, CO, SV, and CI were decreased in the DHF group and the DHF complicated with sarcopenia group (P < 0.05). Compared with the DHF group, the levels of sST2, Myo, IL-6 and HR were increased, while LVEF, CO, SV, and CI were decreased in the DHF complicated with sarcopenia group (P < 0.05). The sST2, Myo, and IL-6 were negatively correlated with LVEF, CO, SV, and CI (P < 0.001), and positively correlated with HR (P < 0.001). The sST2, Myo, IL-6, LVEF, and SV were independent influencing factors for DHF complicated with sarcopenia (P < 0.05). The area under the curve of combined detection of sST2, Myo, and IL-6 for diagnosing DHF complicated with sarcopenia was 0.936, indicating a better diagnostic efficacy than individual tests. Conclusion The levels of sST2, Myo, and IL-6 in peripheral blood are significantly increased in elderly patients with DHF complicated with sarcopenia, and these markers are significantly correlated with cardiac function indexes. Combined detection of these three markers has a higher diagnostic efficacy for DHF complicated with sarcopenia.

Objective : To investigate the mechanism of miRNAs in glycyrrhizic acid treatment of alcohol⁃induced liver injury in rats . Methods : 45 male SD rats were randomly divided into glycyrrhizin group , model group and control group . The rats in glycyrrhizin group were given 56% liquor and glycyrrhizin , the rats in model group were given 56% liquor , and the rats in control group were given distilled water for 8 weeks . The blood was collected and the serum was separated by centrifugation to detect the levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) . RNA were extracted from liver tissues , miRNAs were detected by rat miRNA microarray , and their expression levels were analyzed . The miRNA target genes of differential miRNA were predicted . Gene Ontology (GO) and KEGG Pathway enrichment analysis were used to understand the function of differential miRNA , and the differential miRNA⁃mRNA⁃Pathway regulatory network was constructed using Cytoscape to further screen the regulatory key miRNA and key pathways . qRT⁃PCR was used to verify the expression of selected miRNA . Results : Compared with the model group , the glycyrrhizin group could significantly improve the liver tissue lesions , and reduce the liver serum AST and ALT levels (P < 0. 05) . Compared the microarray data of glycyrrhizin group and model group , a total of 13 differentially expressed miRNA were screened ( P < 0. 05 , fold change ≥ 1 . 5) , of which 10 were up⁃regulated and 3 were down⁃regulated . The GO classification annotation of differential miRNA target genes showed that differential miRNA were related to cell adhesion , antioxidant activity , metabolic process , biological process regulation , cell killing , immune system and other functions . The KEGG Pathway analyling pathway , Hippo signaling pathway , PI3K⁃Akt signaling pathway , wnt signaling pathway , apoptosis and other signaling pathways might play an important regulatory role in the improvement of alcoholic liver injury by glycyrrhic acid . Conclusion This study established the miRNA expression profile of glycyrrhizin in the treatment of alcoholic liver injury in rats , suggested that miR⁃615 , miR⁃107 ⁃3p and miR⁃292⁃5p might play an important role in the treatment of alcoholic liver injury by glycyrrhizin .

OBJECTIVES: To explore the application of random forest algorithm in screening the risk factors and predictive values for postpartum depression. METHODS: We recruited the participants from a tertiary hospital between June 2017 and June 2018 in Changsha City, and followed up from pregnancy up to 4-6 weeks postpartum.Demographic economics, psychosocial, biological, obstetric, and other factors were assessed at first trimesters with self-designed obstetric information questionnaire and the Chinese version of Edinburgh Postnatal Depression Scale (EPDS). During 4-6 weeks after delivery, the Chinese version of EPDS was used to score depression and self-designed questionnaire to collect data of delivery and postpartum. The data of subjects were randomly divided into the training data set and the verification data set according to the ratio of 3꞉1. The training data set was used to establish the random forest model of postpartum depression, and the verification data set was used to verify the predictive effects via the accuracy, sensitivity, specificity, positive predictive value, negative predictive value, and AUC index. RESULTS: A total of 406 participants were in final analysis. Among them, 150 of whom had EPDS score ≥9, and the incidence of postpartum depression was 36.9%. The predictive effects of random forest model in the verification data set were at accuracy of 80.10%, sensitivity of 61.40%, specificity of 89.10%, positive predictive value of 73.00%, negative predictive value of 82.80%, and AUC index of 0.833. The top 10 predictive influential factors that screening by the variable importance measure in random forest model was antenatal depression, economic worries after delivery, work worries after delivery, free triiodothyronine in first trimesters, high-density lipoprotein in third trimester, venting temper to infants, total serum cholesterol and serum triglyceride in first trimester, hematocrit and serum triglyceride in third trimester. CONCLUSIONS Random forest has a great advantage in risk prediction for postpartum depression. Through comprehensive evaluation mechanism, it can identify the important influential factors for postpartum depression from complex multi-factors and conduct quantitative analysis, which is of great significance to identify the key factors for postpartum depression and carry out timely and effective intervention.
Depression, Postpartum/epidemiology* ; Female ; Humans ; Postpartum Period ; Pregnancy ; Pregnancy Trimester, Third ; Psychiatric Status Rating Scales ; Risk Factors ; Sensitivity and Specificity

On January 22, 2020, China National Center for Bioinformation (CNCB) released the 2019 Novel Coronavirus Resource (2019nCoVR), an open-access information resource for the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). 2019nCoVR features a comprehensive integra-tion of sequence and clinical information for all publicly available SARS-CoV-2 isolates, which are manually curated with value-added annotations and quality evaluated by an automated in-house pipeline. Of particular note, 2019nCoVR offers systematic analyses to generate a dynamic landscape of SARS-CoV-2 genomic variations at a global scale. It provides all identified variants and their detailed statistics for each virus isolate, and congregates the quality score, functional annotation,and population frequency for each variant. Spatiotemporal change for each variant can be visualized and historical viral haplotype network maps for the course of the outbreak are also generated based on all complete and high-quality genomes available. Moreover, 2019nCoVR provides a full collection of SARS-CoV-2 relevant literature on the coronavirus disease 2019 (COVID-19), including published papers from PubMed as well as preprints from services such as bioRxiv and medRxiv through Europe PMC. Furthermore, by linking with relevant databases in CNCB, 2019nCoVR offers data submission services for raw sequence reads and assembled genomes, and data sharing with NCBI. Collectively, SARS-CoV-2 is updated daily to collect the latest information on genome sequences, variants, hap-lotypes, and literature for a timely reflection, making 2019nCoVR a valuable resource for the global research community. 2019nCoVR is accessible at https://bigd.big.ac.cn/ncov/.

Objective:To investigate the knowledge and practice of intravenous therapy by pediatric nurses in a province, and analyze the factors influencing the knowledge level of pediatric nurses.Methods:Convenience sampling was used to organize 695 pediatric nurses participated in the academic conference on intravenous therapy safety in a province in May 2019. The self-designed Nursing Practice Standards for Intravenous Therapy Knowledge and Practice Questionnaire was used to investigate. A total of 698 questionnaires were collected including 695 valid questionnaires. Results:Among 695 pediatric nurses, the score of knowledge of intravenous therapy was (51.74±12.90) . There were statistical differences in the score of knowledge of intravenous therapy among pediatric nurses with different education levels, professional titles, positions, ages and working years ( P<0.05) . Multiple linear regression analysis showed that the professional title and position were influencing factors of intravenous therapy knowledge of pediatric nurses in a province ( P<0.05) . The practice standard for intravenous therapy was generally good, but there were still cases of poor education and communication, accounting for 1.73% (12/695) and 2.30% (16/695) respectively. Conclusions:Pediatric nurses in a province lack knowledge of intravenous therapy and are affected by multiple factors. Nursing managers should regularly carry out relevant training for pediatric nurses, especially nurses with low seniority and low professional title. The training should focus on the safety of nursing staff, the assessment of patients' blood vessels and the protection of puncture sites, in order to improve the knowledge of pediatric nursing staff in intravenous therapy.

Hyper-osmotic stress is one of the key factors that decrease the efficiency of biological succinic acid production. To increase the osmotic stress tolerance of succinate-producing Escherichia coli, we studied the influence of IrrE, an exogenous global regulator, on cell osmotic stress resistance. Fermentation results showed that cell growth and succinic acid production by the recombinant increased under different Na+ concentrations. Meanwhile, the maximum dry cell mass, glucose consumption and succinic acid concentration increased 15.6%, 22% and 23%, respectively, when fermented in a 5-L bioreactor. Expressing IrrE improved cell resistance to hyper-osmotic stress. Further comparison of intracellular osmoprotectants (trehalose and glycerol) concentrations showed that trehalose and glycerol concentrations in the recombinant increased. This suggested that introduction of IrrE could enhance intracellular osmoprotectants accumulation which conferred cell with improved resistance to osmotic stress.

Objective: To analyze the information of patients with acute myocardial infarction (AMI) in a single center during last 6 years, and to distinguish the clinical differences of patients between TakoSTubo cardiomyopathy (TTC) and ST-segment elevation myocardial infarction (STEMI). Methods: A total of 1042 consecutive patients with primarily diagnosed acute anterior ST-segment elevation (STEMI) admitted in our hospital from 2008-01 to 2014-04 were retrospectively enrolled. The relevant patients were studied in 2 groups:TTC group, the patients with coronary angiography (CAG) and the contrast study of left ventricle corrected TTC diagnosis, n=10, and STEMI group, the patients received CAG within 6 hours of on set with conifrmed left anterior descending singlevessel disease at the same period of time as TTC patients,n=32. The basic clinical characteristics, levels of blood lipids, MI related biomarkers, the incidence rate of pathological Q wave, QTc interval and negative T wave in 12-lead ECG were compared between 2 groups. Results: The percentage of corrected TTC diagnosis in patients with primarily diagnosed STEMI was 1.06%. The female gender in TTC group and STEMI group was 100% vs 9%,P<0.01, TTC group had more patients with stress history before on set than that in STEMI group (70% vs 22%,P=0.02), lower levels of MI related biomarkers as CK (486 ± 249) U/L vs (716 ± 132) U/L, CK-MB (13.5 ± 17.1) mg/L vs (47.5 ± 21.9) mg/L, cTnI (22.8 ± 16.3) ng/mL vs (56.4 ± 24.0) ng/mL, allP<0.01. The age of morbidity, the ratios of hypertension, diabetes mellitus and blood lipids were similar between 2 groups. The frequency of abnormal Q-wave in ECG was similar between 2 groups, while the QTc interval was different in TTC group and STEMI group (630 ± 117) ms vs (540 ± 62) ms,P=0.001, the negative T waves in ECG leads II, III, aVF, aVR and V6 were as (100.00% vs 3.13%), (60.00% vs 6.25%), (90.00% vs 3.13%), (100.00% vs 21.88%), (100.00% vs 46.88%), allP<0.05. Conclusion: TTC patients with the main presentation as ST-segment elevation are usually having emotional or physical stress before on set, with obviously prolonged QTc interval and more frequency of negative T waves in ECG.

Objective To evaluate masticatory performance and life quality of children with ectodermal dysplasia(ED) after prosthetic rehabilitation.Methods Six children with ED received denture restoration and 18 healthy children were involved in this study.The surface electromyography(EMG) of masseter(MM) and anterior temporalis(TA) during clenching and chewing movement were recorded.The EMG amplitude,area,asymmetry index of total and activity index of MM/TA were compared at each stage.The masticatory efficiency was measured with spectrophotometer.The life quality was assessed using visual analogue scale questionnaire.Results The EMG amplitude of MM and TA during chewing in ED Group were 41.7％ and 45.6％ of the control group respectively,the area were 35.9％ and 36.0％ respectively.Significant difference in asymmetry index of total during clenching was observed between the two groups (P＜0.05) but not during chewing(P＞0.05).The differences of activity index of MM/TA during clenching and chewing between the two groups were not detected(P＞0.05).The masticatory efficiency of ED group was 67.2％ of the control group.The score of chewing function in children with ED after prosthetic rehabilitation was three times higher than before,and no difference was present between the two groups (P＞0.05).Conclusions Early prosthetic rehabilitation can significantly improve the masticatory performance and life quality of children with ED.

Background Measurement of corneal thickness is important for the early diagnosis and treatment of some eye disorders,including corneal diseases and refractive errors.However,the corneal parameters from schoolage population are rarely reported.Objective The aim of this survey was to characterize the central corneal thickness (CCT),minimum corneal thickness (MCT) and paracentral corneal thickness in healthy Chinese schoolage population.Methods A cross-sectional study was designed in this study.Children aged 7 to 15 years with the diopter of-3.00 D to +3.00 D were recruited from two primary schools in Baoshan district in Shanghai based on random cluster sampling under the approval of Shanghai First People's Hospital and informed consent of child custodian.Routine examinations were firstly performed to determine the healthy participants.CCT (within 2 mm range away the corneal vertex),MCT and paracentral corneal thicknesses (2 to 5 mm zone away the cornea vertex in superior,inferior,nasal and temporal quadrants) were then measured by RTVue Fourier optical coherence tomography (OCT) for the comparison between both eyes and different gender.The subjects were grouped into the 7-9,10-12 and 13-15 years groups,and the correlations between age and CCT,MCT and paracental corneal thicknesses were analyzed.The coordinate position of the thinnest cornea was determined.Results A total of 147 children were enrolled in the study.The mean CCT value of the right eyes was (537.77±29.33) μm,and that of the left eyes was (539.22±29.16) μm,showing a significant difference between them (t =-3.21,P =0.00).The paracentral corneal thicknesses of the right and left eyes were (565.52±30.11) μm and (568.42±31.07) pm in the superior quadrant,and those in the temporal quadrant were (549.01 ±30.46) μm and (547.24±30.23) μm,with significant differences between them (t =-2.47,P =0.01 ; t =2.12,P =0.04).No significant difference was found in the CCT,MCT,paracentral corneal thicknesses from various quadrants (all at P＞0.05).In addition,no considerably correlation was seen between age and CCT,MCT and paracentral corneal thickness (all at P＞0.05).The thinnest cornea area was located in the inferotemporal region in 40.82％ right eyes and 57.82％ left eyes.The distance of thinnest cornea area away corneal vertex was (0.62±0.33)mm in the right eyes and (0.91±0.63)mm in the left eyes,with a significant difference between them (t =-5.17,P =0.00).Conclusions The central,superior and temporal corneal thicknesses are significantly different between the right and the left eyes among healthy Chinese school-age children,but corneal thickness change is not associated with age or gender.The thinnest corneal area does not locate at the vertex.