Objective To analyze malaria situation and evaluate the effect of control program in Henan Province during 1990-2005. Methods Data were collected and analyzed on the measures and effects of malaria control, vector surveillance, blood examination for cases with fever and serological surveillance in the province during 1990-2005. Results In the 16 years, a total of 802 700 people were given pre-transmission season treatment with chloroquine and primaquine for a radical cure of vivax malaria, chemoprophylaxis was given to 764 300 people at high risk during the transmission season, treatment or presumptive treatment was given to 43 891 cases. 11 216 100 cases with fever were tested and 11 213 (0.10%) were found positive accounting for 29.01% (11 213/338 654) of all malaria cases. A total of 1 332 800 bed nets were treated with insecticide and 1 999 300 people were protected in 1990-1992 and 1996-1999. 34 846 residents including pupils were tested with IFAT in 1990-2000 and 1149 (3.30%) were positive. The parasite rate amongst 71 234 local residents including pupils was 0.40% (286/71 234). The principal transmitting vectors were Anopheles sinensis and An.anthropophagus. The man-biting habit for An. sinensis and An.anthropophagus was 0.060 8 and 0.314 3 respectively, and the vectorial capacity of An.anthropophagus was 22.4 times higher than that of An.sinensis. In this period, 38 654 malaria cases were reported in the province and the annual malaria incidence was 2.62 per hundred thousand, the lowest annual incidence was in 1992 (0.37 per hundred thousand). 70.05% (27 076/38 654) of these malaria cases were from areas where An. anthropophagus was present. Conclusions In general, the malaria control activities have been effective and the epidemiological situation kept stable in Henan Province, although in some areas the situation is unstable and outbreak spots or focal epidemics occur.

China's prevention and control of parasitic diseases has made remarkable achievements. However,the prevalence and transmission of parasitic diseases is impacted by the complicated natural and social factors of environment ,natural disas-ters,population movements,and so on. Therefore,there are still the risks of the outbreak of emergency parasitic diseases af-fairs,which may affect the control effectiveness of parasitic diseases and endanger the social stability seriously. In this article , we aim at the analysis of typical cases of emergency parasitic disease affairs and their impacts on public health security in China in recently years,and we also elaborate the disposal characteristics of emergency parasitic disease affairs,and propose the estab-lishment of response system to emergency parasitic disease affairs in China,including the organizational structure and response flow path,and in addition,point out that,in the future,we should strengthen the system construction and measures of the re-sponse system to emergency parasitic disease affairs,so as to control the risk and harm of parasitic disease spread as much as possible and to realize the early intervention and proper disposal of emergency parasitic disease affairs.

Objective To develop and validate a method for detecting factor 8 gene (F8) mutations in hemophilia A patients by Ion Torrent semiconductor sequencing .Methods Intron 22 and intron 1 inversions of F8 gene were identified by long distance PCR (LD-PCR), other mutations in the F8 gene were identified by Ion Torrent sequencing.Candidate variants were validated by Sanger sequencing .Sanger sequencing was applied to screen HA carriers from 11 female family members in the 8 pedigrees.One pregnant woman was offered prenatal diagnosis via analyzing the fetal DNA obtained through amniocentesis . Results Four missense mutations ( c.1331A >C, 1648C >T, c.6506G >A, c.6544C >T), two frameshift mutations ( c.2393 _2394insT, c.6320delG), one splicing mutation ( IVS5 +5G >A), one nonsense mutation (c.43C >T) and one Inv22 mutation were identified in all nine probands respectively . Among 11 female family members, 10 females were identified to be HA carriers, and one didn′t carry the maternal pathogenic mutation.Prenatal diagnosis result showed that the fetus inherited the wild -type maternal allele and was predicted to be unaffected by HA .Conclusion The targeted Ion Torrent sequencing is a reliable and efficient method to detect F8 mutations in patients with Hemophilia A disease .

OBJECTIVETo compare the efficacy of telbivudine monotherapy and telbivudine combination therapy with adefovir in patients with nucleos(t)ide-naive chronic hepatitis B, high-level hepatitis B virus (HBV) load and hepatitis B e antigen (HBeAg)-positivity, and to explore the relationship between treatment regimen adherence and treatment outcomes.

METODSA retrospective study was performed with 123 HBeAg-positive, high-level viral load (HBV DNA≥10(7) copies/ml), nucleos(t)ide-naive chronic hepatitis B patients. Fifty-three of the patients received combination therapy with telbivudine and adefovir dipivoxil,while 70 patients received the telbivudine monotherapy. All patients were tested for rates of conversion to HBV DNA-negative status,alanine aminotransferase (ALT) normalization, HBeAg seroconversion, drug resistance, and side effects at treatment weeks 12, 24, and 48. Treatment regimen adherence was assessed through self-reporting, and interviews were used to explore the relationships to treatment outcomes. The chisquare test, t test and Fisher's exact test were used for statistical analyses.

RESULTSThe rates of HBV DNA negative conversion in the combination group at treatment weeks 12, 24 and 48 were 62.3% (33/53), 88.7% (47/53) and 94.3% (50/53) and were significantly different from those in the monotherapy group at weeks 12 and 24.The rates of ALT normalization were significantly different between the two groups at treatment week 12 (94.3% vs. 77.1%). The rate of HBeAg seroconversion in the combination group at treatment week 48 was 39.6%, and significantly different than that of the monotherapy group. The rates of drug-resistance in the combination and monotherapy groups at treatment week 48 were 3.8% and 11.4%, and the proportion of non-adherence to the treatment regimen was 53.3%, which significantly affected treatment outcome. No side effects occurred in either treatment group.

CONCLUSIONTelbivudine combination treatment with adefovir was more effective than telbivudine monotherapy and elicited a low drug resistance rate in nucleos(t)idenaive chronic hepatitis B patients with high-level HBV load and HBeAg-positivity. Adherence to the therapy regimen was a key factor influencing treatment outcomes.

Adenine ; analogs & derivatives ; Alanine Transaminase ; Drug Therapy, Combination ; Hepatitis B e Antigens ; Hepatitis B virus ; Hepatitis B, Chronic ; Humans ; Organophosphonates ; Retrospective Studies ; Thymidine ; analogs & derivatives ; Treatment Outcome ; Viral Load

OBJECTIVETo investigate the inhibitory effects of curcumin against HeLa cell invasion and migration and explore the underlying mechanisms.

METHODSHeLa cells were exposed to curcumin treatment at the concentrations of 0, 10, 25, 50, 100, 150 and 200 µmol/L for 24 h. MTT and TUNEL assays were used to assess the cell proliferation inhibition and apoptosis, respectively. Transwell assay was used to evaluate the invasiveness and migration of the treated cells, and RT-PCR and Western blotting were employed to detect the changes in the expression of inducible nitric oxide synthase (iNOS), and MMP-9 and E-cad, the 2 markers of cell invasion and migration, were detected by Western blotting. The capacity of NO production in HeLa cells was measured by Griess method.

RESULTSCurcumin inhibited the proliferation of HeLa cells by inducing cell apoptosis in a concentration-dependent manner. Curcumin inhibited the invasion and migration of HeLa cells by increasing E-cad expression and decreasing MMP-9 expression, and also decreased the expression level of iNOS and NO production in the cells.

CONCLUSIONCurcumin inhibits the invasion and migration of HeLa cells by decreasing the expression of iNOS.

Apoptosis ; Cell Movement ; drug effects ; Cell Proliferation ; Curcumin ; pharmacology ; HeLa Cells ; Humans ; Matrix Metalloproteinase 9 ; metabolism ; Nitric Oxide Synthase Type II ; metabolism

Objective: To isolate and identify Prevotella nigrescens (P.nigrescens) in gingival crevicular fluid of patients with chronic periodontitis and to analyze its tumor-promoting role in esophageal squamous cell carcinoma (ESCC). Methods: Samples of gingival crevicular fluid were collected from patients with chronic periodontitis and cultured on GAM agar medium under anaerobic conditions. Black colonies on GAM agar plates were picked for subculture, and then the bacteria were isolated and purified. Bacterial identification was conducted using Gram staining and 16S rDNA sequencing analysis. The isolated bacterial species was used to infect ESCC NE6-T cells and the changes in biological characteristics of the infected cells were evaluated. Results: Multiple bacterial colonies were observed after anaerobic culturing of gingival crevicular fluid samples for 120 h on GAM agar plates. A single bacterial colony with pure black and smooth appearance was obtained from grey black bacterial colonies with streak method. It was a Gram-negative bacterium with bead-like shape. It showed 99.78% 16S rDNA sequence identity with P. nigrescens F0103 and was named P. nigrescens LY01. P. nigrescens LY01 infection promoted the in vitro proliferation, migration and invasion of NE6-T cells and the growth of subcutaneous xenograft in nude mice. In addition, it could also induce the upregulation of Ki67 and activation of p-STAT3. Conclusions P. nigrescens inhabiting in gingival sulcus might promote the progression of ESCC in human with chronic periodontitis.

Objective To investigate the inhibitory effects of curcumin against HeLa cell invasion and migration and explore the underlying mechanisms. Methods HeLa cells were exposed to curcumin treatment at the concentrations of 0, 10, 25, 50, 100, 150 and 200 μmol/L for 24 h. MTT and TUNEL assays were used to assess the cell proliferation inhibition and apoptosis, respectively. Transwell assay was used to evaluate the invasiveness and migration of the treated cells, and RT-PCR and Western blotting were employed to detect the changes in the expression of inducible nitric oxide synthase (iNOS), and MMP-9 and E-cad, the 2 markers of cell invasion and migration, were detected by Western blotting. The capacity of NO production in HeLa cells was measured by Griess method. Results Curcumin inhibited the proliferation of HeLa cells by inducing cell apoptosis in a concentration-dependent manner. Curcumin inhibited the invasion and migration of HeLa cells by increasing E-cad expression and decreasing MMP-9 expression, and also decreased the expression level of iNOS and NO production in the cells. Conclusions Curcumin inhibits the invasion and migration of HeLa cells by decreasing the expression of iNOS.

Objective To investigate the inhibitory effects of curcumin against HeLa cell invasion and migration and explore the underlying mechanisms. Methods HeLa cells were exposed to curcumin treatment at the concentrations of 0, 10, 25, 50, 100, 150 and 200 μmol/L for 24 h. MTT and TUNEL assays were used to assess the cell proliferation inhibition and apoptosis, respectively. Transwell assay was used to evaluate the invasiveness and migration of the treated cells, and RT-PCR and Western blotting were employed to detect the changes in the expression of inducible nitric oxide synthase (iNOS), and MMP-9 and E-cad, the 2 markers of cell invasion and migration, were detected by Western blotting. The capacity of NO production in HeLa cells was measured by Griess method. Results Curcumin inhibited the proliferation of HeLa cells by inducing cell apoptosis in a concentration-dependent manner. Curcumin inhibited the invasion and migration of HeLa cells by increasing E-cad expression and decreasing MMP-9 expression, and also decreased the expression level of iNOS and NO production in the cells. Conclusions Curcumin inhibits the invasion and migration of HeLa cells by decreasing the expression of iNOS.

OBJECTIVETo clone and express the recombinant capsid protein VP2 of enterovirus type 71 (EV71) and to identify the immune activity of expressed protein in order to build a basis for the investigation work of vaccine and diagnostic antigen.

METHODSVP2 gene of EV71 was amplified by PCR, and then was cut by restriction enzyme and inserted into expression vector pMAL-c2X. The positive recombinants were transferred into E.coli TB1, the genetically engineered bacteria including pMAL-c2X-VP2 plasmids were induced by isopropyl thiogalactoside ( IPTG) , and the expression products were analyzed by SDS-PAGE and western blotting method. EV71 IgM antibody detection method by ELISA was set up, and the sensitivity and specificity of this method was assessed; 60 neutralizing antibody positive serum samples from hand foot and mouth disease (HFMD) patients were determined, of which 52 samples were positive and 8 samples were negative; a total of 88 acute phase serum samples of HFMD patients diagnosed in clinical were also detected.

RESULTSVP2 gene of 762 bp was obtained by PCR, the gene segment inserted into the recombinant vector was identified using restriction enzyme digestion. The recombinant vector could express a specific about 71 500 fusion protein in E.coli by SDS-PAGE. The purified recombinant protein of EV71-VP2 can react with the serum of HFMD patients to produce a specific band by western blotting. The sensitivity and specificity of ELISA was 87% and 83%, respectively. Of the 88 acute phase serum samples from children with HFMD, 48 samples (55%) were positive by the ELISA assay.

CONCLUSIONSVP2 gene of EV71 has been cloned and a prokaryotic high expression system for VP2 gene was successfully constructed in the present study. The recombination EV71-VP2 has well antigenicity, which could be useful for developing diagnose reagent or vaccine of EV71.

Antibodies, Neutralizing ; blood ; Antibodies, Viral ; blood ; Capsid Proteins ; genetics ; immunology ; Enterovirus A, Human ; genetics ; immunology ; isolation & purification ; Enzyme-Linked Immunosorbent Assay ; Genetic Vectors ; Hand, Foot and Mouth Disease ; immunology ; Humans ; Immunoglobulin M ; blood ; Recombinant Proteins ; genetics ; immunology

Objective:To analyze the effects of multidisciplinary cooperative nutrition management model in acute stroke patients with dysphagia.Methods:From February 2019 to February 2020, 69 acute stroke patients with dysphagia were enrolled in this study. After exclusion of those unable to complete the trial, patients were randomized into control group ( n=30) and experimental group ( n=30). Patients in the control group were given routine nutrition management, while patients in the experimental group were treated under multidisciplinary cooperative nutrition management model. Nutritional indicators were compared between the two groups on Day 1, 7 and 14 after admission, including levels of albumin (ALB), pre-albumin (PALB), hemoglobin (HB), triceps skin-fold (TSF) thickness on the uninjured side, upper arm muscle circumference etc. Incidence of gastrointestinal complications and infectious complications was also recorded. Results:There was no difference between two groups in the levels of HB, TSF thickness and upper arm muscle circumference on the uninjured side (all P>0.05). However, the serum levels of ALB and PALB on Day 7 and 14 in the experimental group were higher than that in the control group(all P<0.05), The incidence of gastrointestinal complications ( P=0.015)and infectious complications ( P=0.016) in the experimental group was lower than that in the control group. Conclusion:Multidisciplinary collaborative nutrition management improved nutritional indicators, reduced the incidence of gastrointestinal complications and infectious complications in acute stroke patients with dysphagia, making multidisciplinary collaborative nutrition management model worthy of clinical promotion and application.