Objective Enterovirus 71(EV71) is one of the important etiologic agent for young children,which can cause various kind of diseases.EV71 can cause HFMD outbreak in a large scale and encephalmeningitis to death.This review introduced the research method and status of EV71 molecular epidemiology,examined and analyzed the evolution of EV71,summerized all genotype/subgenotype for EV71.the geographic and time distribution.

Enterovirus ; Enterovirus A, Human ; Humans ; Vaccination ; Vaccines

AIM:To observe the contents of ursolic acid and oleanolic acid in Liuwei Dihuang Pill(Radix Rehmanniae praeparata,Rhizoma Dioscoreae,Fructus Corni,Rhizoma Alismatis,etc.) from different manufacturers and explore their effects on quality of Liuwei Dihuang Pill.METHODS:Ursolic acid and oleanolic acid in Liuwei Dihuang Pill were determined by HPLC-PAD method using Kromasil C_ 18 column(4.6 mm?250 mm,5 ?m) as chromatographic column,methanol-water-phosphate(88∶12∶0.02) as the mobile phase at the rate of 1.0 mL/min.RESULTS:6.462-0.718 ?g of ursolic acid and 3.132-0.348 ?g of oleanolic acid presented a good linear relationship.The average recoveres were 99.73% and 97.59%,RSD were 1.5% and 1.7%,respectively.There were significant differences in the contents of ursolic acid and oleanolic acid in Liuwei Dihuang Pill from four different manufacturers.CONCLUSION:The method is simple,rapid and feasible to set up determination of ursolic acid and oleanolic acid in Liuwei Dihuang Pill by HPLC-PAD.Although the contents of ursolic acid and oleanolic acid have significant differences in different manufactures,the results show good consistency in the content variation of the two acids.

Objective To comparatively analyze the differences of contraceptive situation of artificial abortion women between urban area and districts and counties in Chongqing City to provide a theoretical basis for optimizing the family planning service strategy.Methods The Women Baseline Qestionnaire of Family Planning Service Survey and Study after Abortion provided by the Scientific and Technical Institute of National Population and Family Planning Commission was adopted to survey the contraceptive situation among women receiving artificial abortion in the outpatient department of our hospital and distric and county hopstials during 2015.Results (1)The age and marital status had no statistical difference between the two groups(P＞0.05);(2)no contraceptive measures adopted and confraceptive failure were main reasons causing artificial abortion,and there was no statistic difference between the two groups(P＞0.05);(3)the contraceptive measures adopted after artificial abortion were dominated by IUD,short acting oral contraceptive and condom,in which the women selecting the long termcontraceptive measures such as IUD and subdermal implant in the distric and county group was larger than that in the urban group,while the number of the women selecting the short term contraceptive measures such as condom and short term contraceptive drugs in the distric and county group were higher than those in the urban area group,the difference was statistically significant(P＜0.05).Conclusion The main reasons causing ar tificial abortion are low use rate of contraception measures,low efficiency of contraceptive modes,fluke minds existence or lack of understanding of contraceptive methods.But in general,the population selecting high efficiency contraceptive measures in the urban group is lower than that in the distric and county group.

Objective : To investigate the effect of aluminum exposure on expression of miR-497-5p, wingless murine breast cancer virus integration site family member 3a (Wnt3a), β-catenin protein, glycogen synthase kinase-3β (GSK-3β) protein and tau protein in rat adrenal pheochromocytoma PC12 cells, so as to provide insight into unraveling the mechanisms underlying aluminum exposure-induced abnormal phosphorylation of tau protein. Methods: PC12 cells were exposed to Al(mal)3 at concentrations of 0, 100, 200, 400 μmol/L for 24 h. The viability of PC12 cells was measured using cell counting kit-8 (CCK-8) assay. The relative expression of miR-497-5p and Wnt3a was detected using a real-time fluorescent quantitative PCR (RT-qPCR) assay, and the expression of Wnt3a, β-catenin, GSK-3β, P-GSK-3β (Ser9), tau and p-tau (Ser396) proteins were determined using Western blotting. Results : The viability of PC12 cells appeared a tendency towards a decline with the increase of aluminum dose (Ftrend=323.473, P=0.001). RT-qPCR assay detected that the relative miR-497-5p expression appeared a tendency towards a rise with the increase of aluminum dose (Ftrend=14.888, P=0.031), and the relative Wnt3a expression appeared a tendency towards a decline with the increase of aluminum dose (Ftrend=165.934, P<0.001). The miR-497-5p expression negatively correlated with the relative Wnt3a expression (r=-0.693, P=0.012). The expression of Wnt3a (Ftrend=357.656, P=0.001), β-catenin (Ftrend=208.750, P=0.001) and p-GSK-3β (Ser9) proteins (Ftrend=512.583, P<0.001) appeared a tendency towards a decline with the increase of aluminum dose, and the expression of GSK-3β (Ftrend=39.965, P<0.001), tau (Ftrend=277.929, P=0.006) and p-tau (Ser396) proteins (Ftrend=96.247, P=0.002) appeared a tendency towards a rise with the increase of aluminum dose. Conclusion Up-regulation of miR-497-5p and GSK-3β expression and down-regulation of Wnt3a and β-catenin expression may be a mechanism underlying aluminum exposure-induced abnormal phosphorylation of tau protein.

Objective:To evaluate the effects of magnetic attachment keepers on MRI images.Me-thods:In in vitro part,keepers of MAGFIT EX 400,MAGFIT EX 600 and MAGNEDISC 800 magnetic attachment systems were cast into standard root-caps with different alloy respectively,including nickel-chromium alloy and gold-palladium alloy,or not be cast for contrast.In in vivo part,volunteers with keepers in different position and amount were included.All the specimens and volunteers were imaged by a Siemens SONATA 1.5-T MRI scanner.Extent of the artifacts in every slice was measured.The magnitude of the artifacts and the distortion of the anatomic structures were compared.Results:All kinds of keepers being studied produced obvious MRI artifacts.The extent of MRI artifacts induced by MAGFIT EX 400 keepers,MAGFIT EX 600 keepers and MAGNEDISC 800 keepers are 158.94 mm,168.52 mm and 173.00 mm,respectively.The images of mental region,tongue,palate,jawbone and sinus were evidently obscured by artifacts in all cases.When keeper was put in the molar region,the keeper-related MRI artifact may obscure the imaging of brain,spinal cord.SE sequence with right-left frequency-encoding direction was more desirable in MRI for the patients with magnetic attachment keepers.Conclusion:Keepers of magnetic attachment system did induce obvious artifacts in MRI examination.

BACKGROUND:Studies have shown that the number of osteoblasts is often decreased after osteoporosis, and osteoblast replacement therapy becomes a new target for the treatment of osteoporosis. OBJECTIVE:To observe the osteogenic differentiation of human bone marrow mesenchymal stem cels cultured in dexamethasone, vitamin C and beta-glycerophosphate. METHODS:Mesenchymal stem cels were isolated and purified from adult bone marrow using human lymphocyte separation medium. The expression of cel surface markers was detected by flow cytometry. Cel ultrastructure was observed by transmission electron microscope. Then, the bone marrow mesenchymal stem cels were cultured in osteogenic induction medium containing dexamethasone, vitamin C andβ-glycerophosphate, and RT-PCR was used to detect the bone morphogenetic protein-2 mRNA expression after osteogenic induction. RESULTS AND CONCLUSION:A large number of adherent cels were visible as fibrous growth at 2 weeks after culture and strongly expressed CD44, CD29, but did not express CD34, CD45. These cels could be induced to differentiate into osteoblasts, and express bone morphogenetic protein-2 mRNA. Alizarin red staining and alkaline phosphatase staining were positive for the cels. These findings suggest that human bone marrow mesenchymal stem cels cultured in dexamethasone, vitamin C and beta-glycerophosphate can differentiate into osteoblasts, and has a potential for the treatment of osteoporosis.

Objective To Summarize experiences in the treatment of serious injury of pancreas using damage control laparotomy. Methods Retrospectively analyze the choice of surgical method and follow-up treatments on 38 patients cured by DCL,who were in serious injury of pancreas. Results 12 cases(32%) were stanched, surgical debrided and drainage quickly,6 cases(16%) were treated with improved Cogbill operation,and 20 cases(S3% ) were treated with pancreateduodenectomy without reconstruction of enteron. After recovery in SICU, all patients were treated with deterministic operation again. Totally 4 cases(11%) died,with no relation with surgical operation,and 34 cases (89%) were cured. Pancreatic fistula occurred in 4 patients(11% ) ,all of which have been cured with conservative treatment. Conclusion Patients with serious injury of pancreas in accordance with DCL, should choose proper method and take fractionated operation,based on different places and extent of the injury of pancreas.

Objective To investigate strain and strain rate of right ventricular(RV)based on twodimensional image by velocity vector imaging in normal subjects.Methods Thirty-two healthy adults were rolled in this study.Echocardiographic images in 4 chamber view were analyzed by conventional manual tracing for volumes and ejection fractions,which were also measured by velocity vector imaging.Myocardial velocity,strain rate,and strain were determined at the basal,mid,and apical segments of the RV free wall and ventricular septum by velocity vector imaging.Results RV ejection fractions obtained with manual tracing correlated strongly with the same indexes obtained by velocity vector imaging method in all subjects(r=0.91,P＜0.01).The strain and strain rate value of middle segment and basal segment in RV free wall were higher than those of apical segment.There were same trend in ventricular septal.The strain and strain rate of middle segment and basal segment in RV free wall were higher than those of homologous segments in ventricular septal,but the indexes of apical segment in free wail and septal had no difference.The strain and strain rate in RV were not correlated with age.Conclusions Velocity vector imaging could accurately and quantitatively assess the strain and strain rate of RV.

Objective To study the expressions of metadherin (MTDH) and cyclinD1 in esophageal squamous cell carcinoma (ESCC) and their clinical significances. Methods The protein expressions of MTDH and cyclinD1 were detected by immunohistochemistry in 78 cases of ESCC. Results The positive expression rate of MTDH in ESCC was 71.79%(56/78) and the positive expression rate of cyclinD1 in ESCC was 74.36%(58/78). The expressions of MTDH and cyclinD1 were significantly correlated with the degree of differentiation and lymph node metastasis (both P< 0.05), but not with the age, gender of patients and depth of tumor invasion (all P> 0.05). Conclusion The over expressions of MTDH and cyclinD1 protein may involve in the occurrence and development of esophageal carcinoma, which play important roles in the invasion and metastasis of esophageal cancer.