Objective To study the effects of Danggui-Chuanxiong herb pair medicine on vasoactive substances,adhesion factors,inflammatory factors,and VEGF-PI3K-AKT/NF-κB signaling pathways,in order to elucidate the mechanism of Danggui-Chuanxiong herb pair on the treatment of ischemic stroke(IS).Methods The oxygen glucose deprivation/reoxygenation(OGD/R)model of human umbilical vein endothelial cells(HUVEC)was constructed,and the cell viability was detected by cell proliferation kit(CCK-8 method)to explore the optimal modeling time of seven components;The release of lactate dehydrogenase(LDH)was detected by cytotoxicity kit;The expression of related cytokines was detected by enzyme-linked immunosorbent assay(ELISA);The mRNA expression of key proteins in the signaling pathway was detected by reverse transcription-polymerase chain reaction(RT-PCR).Results Reoxygenation after 6 h of oxygen-glucose deprivation of HUVEC is the best modeling time.High-dose chlorogenic acid group,ferulic acid group,senkyunolide H,low-dose and medium-dose butylidenephthalide group,medium-dose and high-dose senkyunolide A and ligustilide groups significantly decreased LDH leakage rate(P<0.05,P<0.01);The expression of IL-6 in the cells of the partial dose group of chlorogenic acid,caffeic acid,butenylphthalide,senkyunolide H and senkyunolide A was significantly increased,the expression of IL-1 in the cells of the partial dose group of chlorogenic acid,ferulic acid and senkyunolide A was significantly decreased,the expression of VEGF,ICAM-1 and VCAM-1 in the cells of the partial dose group of chlorogenic acid,ferulic acid and senkyunolide H was significantly decreased,the expression of NF-κB in the cells of the partial dose group of chlorogenic acid,ferulic acid,senkyunolide H and ligustilide was significantly decreased,the expression of PAI-1 in the cells of ferulic acid and senkyunolide H partial dose group decreased significantly(P<0.05,P<0.01);The mRNA relative expression levels of ERK,VEGF,NF-κB,VEGFR2 and MMP9 were significantly down-regulated in the cells of chlorogenic acid,ferulic acid,caffeic acid,butylidenephthalide and senkyunolide A partial dose group,while the mRNA relative expression levels of AKT were significantly up-regulated in the cells of senkyunolide H and senkyunolide A partial dose groups(P<0.05,P<0.01).Conclusion The medicinal components of Danggui-Chuanxiong herb pair may play a role in IS by inhibiting the mRNA expression of adhesion factor,inflammatory factor and key protein of VEGF-PI3K-AKT/NF-κB signaling pathway in HUVEC.

Objective To investigate the clinical effect of respiratory trainer in the patients with acute exacerbation of chronic obstructive pulmonary disease (COPD) undergoing non-invasive positive pressure ven-tilation.Methods A total of 85 patients with COPD undergoing non-invasive positive pressure ventilation ad-mitted and treated in the Affiliated Minda Hospital of Hubei Nationalities University during 2019-2023 were selected as the study subjects and divided into the experiment group and the control group through random number table method.The control group adopted the symptomatic and supportive treatment such as routine non-invasive positive pressure ventilation,anti-infection,preparation aspiration for spasmolysis and eliminating phlegm,while on the base of the control group,the experiment group adopted respiratory trainer (K5) for re-spiratory training each once in the morning and at night.The differences in the related indexes were compared between the two groups.Results The percentage of forced expiratory volume in the first second (FEV1％),forced expiratory volume in 1 second/forced lung capacity (FEV1/FVC),COPD assessment test (CAT) score,modified Medical Research Council Dyspnea Scale (mMRC) score,6-min walking distance (6MWD),SGRQ score,maximum inspiratory pressure (MIP),maximum expiratory pressure (MEP),partial pressure of carbon dioxide (PaCO2) and PaO2 on 3,7 d after treatment in both groups had statistically significant differ-ence compared with before treatment (P<0.05),and the improvement of the above indicators in the experi-ment group was more significant compared with the control group (P<0.05).Conclusion Respiratory train-er could improve the clinical effect and pulmonary ventilation function in the patients with acute exacerbation of COPD undergoing non-invasive positive pressure ventilation.

Abstract During the yellow fever epidemic in Angola in 2016, cases of yellow fever were reported in China for the first time. The 11 cases, all Chinese nationals returning from Angola, were identified in March and April 2016, one to two weeks after the peak of the Angolan epidemic. One patient died; the other 10 cases recovered after treatment. This paper reviews the epidemiological characteristics of the 11 yellow fever cases imported into China. It examines case detection and disease control and surveillance, and presents recommendations for further action to prevent additional importation of yellow fever into China.

Objective: To explore the efficacy of tenofovir disoproxil and adefovir dipivoxil treatment in patients with hepatitis B virus e antigen (HBeAg) negative was analyzed through the comparison of highly sensitive HBV viral load monitoring with HBV genotyping and drug resistance mutations. Methods: The clinical data of newly diagnosed chronic hepatitis B patients from January 2015 to June 2017 in outpatients and inpatients were randomly divided into tenofovir and adefovir group. Quantitative detection of HBV DNA levels before therapy and at 12, 24, 48, 96, and 120 weeks after therapy were determined for HBV genotypes and drug-resistant mutations in HBeAg-negative patients. Student’s t-test was used to compare the measurement data between groups. The data of comparison between groups were tested by χ ². Results: A total of 106 cases of HBeAg-negative patients were collected. Tenofovir disoproxil had a higher rate of HBV DNA suppression (54%) than adefovir dipivoxil treatment (42%), but the difference was not statistically significant (P = 0.19). After 120 weeks of treatment, a total of 46 patients (93.9%) were enrolled in the tenofovir disoproxil group with HBV DNA quantitation < 2 000 IU / ml. Adefovir dipivoxil group of patients with HBV DNA < 2 000 IU / ml a total of 40 cases, accounting for 75.5%. The difference between the two groups was statistically significant (P < 0.05). For 49 cases of HBeAg-negative patients, HBV B, C, B and C were mixed before tenofovir dipivoxil treatment, and C1653T, A1762T and G1764A mutation sites were detected in patients with D genotype. Patients C, B, C, B, and C were examined for C1673T, G1896, G1858, G1899A. After treatment, the detection rate of the above mutation sites decreased, but C1653T, C1673T and G1899A were not detected. New mutation sites such as G1915A / C, L180M, M204V, V207I / L, T184A and V173L were detected, Low resistance rate (25%). Conclusion Tenofovir disoproxil can be recommended as a treatment for HBeAg-negative patients. For HBeAg-negative patients, the choice of high-sensitivity detection of HBV DNA levels, better monitoring of anti-HBV efficacy.

Objective To investigate the roles and mechanisms of hepatocyte nuclear factor 4α (HNF4α) in chenodeoxycholic acid (CDCA) induced gastric intestinal metaplasia (IM).Methods After the immortalized gastric mucosal epithelial cells GES-1 were stimulated with CDCA at different concentration,the changes of HNF4α,caudal-related homeobox 2 (CDX2) and trefoil factor family 3 (TFF3) expressions at mRNA and protein levels in GES-1 cells and gastric cancer cell lines (AGS,SGC7901 and BGC823) were detected by real time-polymerase chain reaction (RT-PCR) and Western blotting.After GES-1 were transfected with HNF4α short hairpin RNA (shRNA) or control shRNA,and followed by CDCA stimulation,the expressions of HNF4α,CDX2 and TFF3 at protein level were determined by Western blotting.HNF4α was overexpressed in GES-1 cells and SGC7901 cells,and HNF4α was silenced in BGC823 cell line and AGS by lentiviral vector system.The expressions of HNF4α,CDX2 and TFF3 at mRNA and protein levels were tested by RT-PCR and Western blotting.Luciferase reporter assay was used to analyze the regulation role of HNF4α on CDX2.T test was performed for statistical analysis.Results The expressions of HNF4α in GES-1,SGC7901,BGC823 and AGS cells at mRNA level were 1.00 ± 0.12,263.01±10.23,848.01±18.13 and 3 049.86±91.75,respectively.The mRNAlevels of HNF4α in AGS,BGC823 and SGC7901 cells were all higher than that of GES-1 cells,and the differences were statistically significant (t=33.23,46.72 and 25.62,all P＜0.01).The expressions of HNF4α in GES-1,SGC7901,BGC823 and AGS at protein level were consistent with mRNA level.The expressions of CDX2 and TFF3 at protein level of HNF4α shRNA transfected group were lower than those of non-HNF4α shRNA transfected group.In GES-1 cells,the expressions of HNF4α,CDX2 and TFF3 of HNF4α overexpressed group at mRNA level were 16 281.839 ± 1 843.017,6.275 ± 0.137 and 17.310± 1.533,respectively;which were all higher than those of overexpressed control group (1.000 ± 0.048,1.000 ± 0.012 and 1.000±0.108,respectively),and the differences were statistically significant (t =8.83,38.29 and 10.61,all P＜0.01).In AGS cells,the expressions of HNF4α,CDX2 and TFF3 of HNF4α silenced group at mRNA level were 0.021 ± 0.001,0.088 ± 0.007 and 0.074 ± 0.002,respectively,which were lower than those of silenced control group (1.000 ± 0.108,1.000 ± 0.131 and 1.000 ± 0.122),and the differences were statistically significant (t=9.09,6.93 and 7.57,all P＜0.01).In GES-1 overexpressed cells and AGS silenced cells,the expressions of HNF4α,CDX2,TFF3 at protein level were consistent with mRNA level.In double reporter plasmid containing the CDX2 promoter CDX2 1 (-2 000～-1 bp) and CDX2-2 (-1 510～1 bp),after transfected with HNF4α shRNA,the activities were 0.387 ± 0.013 and 0.533 ± 0.040,respectively,which were lower than those of HNF4α shRNA transfected control group (0.605 ± 0.012 and 0.882 ± 0.019),and the differences were statistically significant (t =21.49 and 13.53,both P＜0.01).Conclusion HNF4α may be involved in bile acid induced intestinal metaplasia by upregulating the expression of CDX2.

Since the first outbreak of avian influenza A(H7N9) virus in humans was identified in 2013, there have been five seasonal epidemics observed in China. An earlier start and a steep increase in the number of humans infected with H7N9 virus was observed between September and December 2016, raising great public concern in domestic and international societies. The epidemiological characteristics of the recently reported confirmed H7N9 cases were analysed. The results suggested that although more cases were reported recently, most cases in the fifth epidemic were still highly sporadically distributed without any epidemiology links; the main characteristics remained unchanged and the genetic characteristics of virus strains that were isolated in this epidemic remained similar to earlier epidemics. Interventions included live poultry market closures in several cities that reported more H7N9 cases recently.

Objective To describe the epidemic of imported infectious diseases in China between 2013 and 2016, including the kinds of infectious diseases, affected provinces, source countries and the epidemiological characteristics, and provide scientific information for the prevention and control of imported infectious diseases. Methods Data of cases of imported infectious diseases in China from 2013 to 2016 were collected from national information reporting system of infectious diseases, Microsoft Excel 2010 and SPSS 18.0 were used to conduct data cleaning and analysis. Results From 2013 to 2016, a total of 16206 imported cases of infectious diseases were reported in China. Of all the cases, 83.12%(13471 cases) were malaria cases, followed by dengue fever (2628 cases,16.22%). The majority of the imported cases were males (14522 cases, 89.61%). Most cases were aged 20-50 years. Except Zika virus disease and yellow fever, which were mainly reported before and after spring festival, other imported infectious diseases mainly occurred in summer and autumn. The epidemic in affected provinces varied with the types of infectious diseases, and Yunnan reported the largest case number of imported infectious diseases, followed by Jiangsu, Guangxi and Guangdong. The imported cases were mainly from Asian countries, such as Burma, and African countries, such as Angola, Equatorial Guinea and Ghana, which also varied with the types of infectious diseases. Conclusions We should pay more attention to imported infectious diseases and strengthen the prevention and control measures in our country. In order to reduce the incidence of imported infectious diseases, the health education should be enforced for persons who plan to travel abroad and the active surveillance should be strengthened for returned travelers.

Objective To establish an infection model using Caenorhabditis elegans (C.elegans)-extensively drug-resistant Klebsiella pneumoniae (XDRKP)system.Methods Clinically isolated XDRKP strains were used to infect C.elegans in the liquid killing assay,the nematode survival and the number of bacteria in C.elegans digestive tract was observed.Results C.elegans was significantly retarded after being infected by XDRKP,different concentra-tions of XDRKP led to different patterns of the worm death.Log-rank test showed that survival curves of C. elegans infected with 1 .5×106 CFU/mL of XDRKP and E.coli OP50 (control)were not significantly different (χ2 =0.08,P >0.05);survival curves of C.elegans infected with 1 .5 ×107 CFU/mL,1 .5 ×108 CFU/mL of XDRKP and E.coli OP50 were significantly different(χ2 =229.37,275.98,respectively,both P <0.001).The survival rates of 1 .5×108 and 1 .5 ×107 CFU/mL XDRKP groups were both lower than that of the control group.Supernatant suspension obtained from test was performed bacterial culture,identification and antimicrobial susceptibility testing, XDRKP was determined.After being infected with XDRKP 4,6,12,and 24 hours,the total number of bacteria in C.elegans were(0.28±0.02)×105 CFU/mL,(0.50 ±0.38)×105 CFU/mL,(1 .73 ±0.56)×105 CFU/mL,and (2.62±0.53)×105 CFU/mL,respectively,the number of bacteria in C.elegans digestive tract was significantly different at different time points (F =1 363.39,P <0.001).Conclusion The infection model of C.elegans-XDRKP is established successfully.

OBJECTIVETo investigate the associations of occupational, educational and residential factors with the outcomes of in vitro fertilization -embryo transfer (IVF-ET).

METHODSA retrospective analysis was conducted among 3998 patients undergoing the first treatment with IVF-ET and 3064 perinatal infants in our center between January, 2010 and June, 2014. The relation of the patients' occupation, educational background, and residence registry with IVF-ET outcomes was analyzed.

RESULTSThe risk of abortion in the first trimester was significantly higher in female patients engaged in agriculture (OR=4.319, P=0.047). Occupation and educational background of the patients and their spouse were related with the incidence of ectopic pregnancy following IVF-ET. The total incidence rate of perinatal birth defects was 2.1% in this cohort, and was the highest in Shenzhen (5.5%) but this difference was not statistically significant (P>0.05).

CONCLUSIONThe patients' occupation and educational background are related with the outcomes of IVF-ET, suggesting the importance of health education and prenatal examination.

Abortion, Spontaneous ; Educational Status ; Embryo Transfer ; Female ; Fertilization in Vitro ; Humans ; Incidence ; Infant ; Occupations ; Pregnancy ; Pregnancy Outcome ; Pregnancy, Ectopic ; Residence Characteristics ; Retrospective Studies