Background As the main cellular constituent of corneal epithelium,corneal epithelial cells play critical roles in regulating and controlling the migration, proliferation and differentiation of cells during the repair of damage.MicroRNA (miRNA) is endogenously expressed small non-coding RNAs, which participates in a variety of biological processes.Previous studies demonstrated that miR-204 is highly expressed in normal corneal epithelium,but its function is still unclear.Objective This study was to investigate the function and mechanism of miR-204 in corneal epithelial cell proliferation.Methods Corneal epithelial tissue was collected during the corneal refractive surgery from the patients with refractive error under the informed consent, and human corneal epithelial cells(HCECs) were cultured and passaged.The relative expressing levels of miR-204 mRNA in the normal corneal epithelium and HCECs were detected by real time quantitative PCR.Cultured HCECs were evenly divided into three groups.The liposome with miR-204 mimic was transfected into the cells of the miR-204 mimic group, and blank liposome was transfected in the cells of the positive control group,and regularly cultured cells served as the normal control group.Cell proliferation capability was evaluated by colony-forming assay, and the percentage of the cells in different cell cycles was analyzed by flow cytometry.Western blot assay was employed to detect the expression levels of p-RB, E2F1 ,p27,CyclinA, CDC2, p-CDC2 and CDK2 proteins in the cells.Results The relative expression levels of miR-204 mRNA were 1.077 ±0.268 in the normal corneal epithelium and 0.041 ±0.018 in the HCECs, showing a significant difference between them (t =7.700,P＜0.001).The cloning cell number was evidently decreased in the miR-204 mimic group in comparison with the positive control group and normal control group.The percentage of cells in the G1 phase was 47.75％ in the miR-204 mimic group, which was significantly higher than 37.23％ in the positive control group and 40.72％ in the normal control group.The expression levels of E2F1 and p27 proteins in the cells were elevated (t=14.87,25.11;both at P＜0.01) and those of CDK2 and p-CDC2 proteins were decreased (t=5.39,10.65;both at P＜0.01) in the miR-204 mimic group in comparison with the positive control group.Conclusions The overexpression of miR-204 in the normal corneas probably is associated with non-proliferation status of corneal epithelial cells.Transfection of miR-204 into corneal epithelial cells can inhibit the proliferation of corneal epithelial cells probably by up-regulating the expression of E2F1 and p27 and suppressing the expression of CDK2/CyclinA and p-CDC2/CyclinA,which lead to cell arrest in G1 phase.

Objective To explore the clinical effects of calium dobesilate combined with compound thrombosis for patients with diabetic retinopathy due to visual field defect.Methods 112 cases of patients with diabetic retinopathy from February 2014 to February 2016 in our hospital were selected and randomly divided into the observation group and the control group,56 cases in each group.The control group were given compound Xueshuantong, while the observation group were treated with calcium dobesilate orally.And both the two groups were treated for five months.The hemangioma volume , macular thickness, hemorrhagic spot area, visual gray value, visual acuity, CRP, VEGF and IGF-1 levels in two groups were measured before and after treatment, as well as the clinical efficacy and adverse effects during the treatment.Results The total effective rate in the observation group was 94.6%significantly higher than that in the control group 71.4% (P<0.05).After treatment, in the two groups the hemangioma volume, macular thickness, hemorrhagic spot area, visual field gray value, visual acuity and 30°threshold sensitivity were significantly improved (P<0.05),but the improvement in the observation group was more (P<0.05).After treatment, the levels of hs-CRP, VEGF and IGF-1 were all significantly decreased (P<0.05), but the observation group decreased more significantly (P<0.05).Adverse reactions were mainly gastrointestinal reactions, and the incidence of adverse reactions in the two groups had no statistically significant difference.Couclusion Calcium dobesilate combined with compound thrombosis for patients with diabetic retinopathy due to visual field defect can improve the visual field defect of diabetic retinopathy patients.Its clinical effects is better and the safety is higher, which mechanism may be related to reducing the level of inflammatory factors in patients.

There are a variety of inherited metabolic diseases (IMD), the incidence is low and clinical manifestations are not char-acteristic. IMD primarily affect not only the nervous system, but also the blood system, which characterized by the abnormalities of blood cells and bone marrow. Because of some clinician's lack of this knowledge, some patients are prone to be misdiagnosed. To pro-mote early diagnosis, this article reviews five groups of IMD (lysosomal storage disease, vitaminopathies, organic aciduria, amino-acidopathies and others) and different hematological abnormal manifestations.

Objective To confirm the structure validity of questionnaire through a probe into latent factorial structure of the rear service personnel′s job satisfaction from polyclinics hospitals .Methods The questionnaire′s construct validity was estimated by ex‐ploratory factor analysis (EFA) and confirmatory factor analysis(CFA) .Results Exploratory factor analysis made the question‐naire including six factors which belonged to job satisfaction and occupation loyalty .Every factor had reasonable explanation and six factors remained 70 .306% information .Exploratory factor analysis of job satisfaction showed five factors ,explaining 70 .514% in‐formation .The confirmatory factor analysis model 1 and model 2 were conducted by LISREL8 .70 software .The results showed that X2 freedom degree was less than 5 .In addition to adjust the goodness of fit index was less than 0 .9 ,all other fit indices were greater than 0 .9 .At the same time ,SRMR and RMSEA were less than 0 .08 .Conclusion The results of exploratory factor analysis(EFA) and confirmatory factor analysis(CFA) both reveal that the questionnaire′s construct validity was good .

The management of emerging infectious diseases has always been given a high priority in public health. Identification of the epidemiological characteristics and transmission patterns of emerging infectious diseases is of great significance to contain the disease transmission and reduce the damages to public health and socioeconomic developments. Currently, infectious disease dynamics models are mainly established based on infectious disease surveillance data to predict the epidemiological patterns and trends of emerging infectious diseases; however, many model-based predictions fail to achieve the expected results due to the presence of multiple uncertain factors during the integrated management of infectious diseases. This review describes the basic principles and variables of common infectious disease dynamics models, including the susceptible-infected-recovered ( SIR ) model, susceptible-infected-removed-susceptible ( SIRS ) model, susceptible-exposed-infected-removed ( SEIR ) model and improved SEIR model, compares the advantages and disadvantages of these models, and summarizes the advances of the infectious disease dynamics models in the prediction of trends in incidence of emerging infectious diseases, so as to provide insights into the effective application of infectious disease dynamics models in the management of infectious diseases.

Objective:To investigate and analysis the distribution situations of Rh blood group system from voluntary blood donors in Foshan area.Methods:Anti-D,anti-C,anti-c,anti-E and anti-e reagents were used to identify Rh blood group system and the RhD(-) was confirmed.The phenotypes,haplotypes and corresponding genotypes frequencies were calculated and the datas were analyzed based on Hardy-Weinberg law.Results:The characteristics of phenotype frequencies in the voluntary blood donors in Foshan area was CCDee＞CcDEe＞CcDee＞ccDEE＞ccDEe＞CCDEe＞CcDEE＞ccdee＞ccDee,Ccdee＞CCdee,ccdEe＞CCDEE,CCdEE,CCdEe,CcdEE,CcdEe and ccdEE.The characteristics of haplotypes frequencies was CDe＞cDE＞cDe＞CDE,de＞Cde＞cdE＞CdE.The characteristics of genes frequencies was D＞d,C＞c,e＞E.The frequency of RhD(-)phenotype was 0.379%.The gene frequency of d was 0.061.The observed value and desired value of the haplotypes and corresponding genotypes were not statistically significant(P>0.05).The data were analyzed well based on Hardy-Weinberg law.Conclusion:The result is reliable according to Hardy-Weinberg law.The distribution of Rh blood group system from voluntary blood donors in Foshan area has geographic and general characteristics.The result is important in guiding the recruitment of voluntary blood donors and banking blood reasonably and enhancing the abilitiy of offering blood for the recipients of rare blood group.

Listeriamonocytogenes is a facultative intracellular bacterium that enters professional antigen presenting cells , presents passenger antigens to the major histocompatibility complex class I and II pathways ,then elicits CD+4 and CD+8 T-cell-mediated immune responses .It was demonstrated that attenuated Listeriamonocytogenes as a novel live vaccine vector in deliv-ering tumor antigens of cervical cancer and melanoma etc .,could induce strong protective immune response ,and shows effec-tive antitumor immunotherapeutics .This review discussed the characteristics of immune responses elicited by Listeria monocy-togenes ,and the progress of its antitumor immunotherapeutics as delivery vaccine vector .

The prevalence of human and animal listeriosis for nearly 11 years in China was investigated in this study . The literature information about listeriosis in China from 2002 to 2012 was collected through retrieval system to make clinical and epidemiological statistical analysis of listeriosis .Cases of listeriosis were reported in 27 (79% ) provinces of China .The re-sult showed that animal listeriosis was reported for 123 times ,among these reports ,most were from pigs (39% ) ,and the sheep was in second place .Central nervous system infection was the main clinical manifestation of listeriosis in animals (72% ) . For human listeriosis ,84 clinical cases of listeriosis were reported ,including 35% cases in non-perinatal stage and 65% cases in perinatal stage .The main clinical manifestation of listeriosis was septicemia (51% ) .According to the result of investigation about listeriosis based on literatures information ,Listeriamonocytogenes caused humans and animals listeriosis annually ,which were reported in most provinces of China .The epidemic characteristics for listeriosis suggested that it was essential to strength-en the prevention and control of listeriosis .

Objective To study the therapeutic effects of Xileisan Pessary on rats with cervicitis based on the idea of treating different diseases with the same therapy. Methods Vagina perfusion of hydroxybenzene mucilage was used to establish rat cervicitis models. Rats were randomly divided into normal group, model group, positive medicine group, low-, medium-, and high-dose Xileisan Pessary groups. Rats with cervicitis were treated with Xileisan Pessary from the next day after modeling for 10 days. The amount of neutrophilic granulocytes and leukocytes were detected by blood routine analysis meter; cervial histopathologic examination was conducted by HE staining. Results Compared with normal group, the numbers of granulocyte and leucocyte increased significantly in the model group (P<0.01). Compared with the model group, the numbers of granulocyte and leucocyte in the low-dose Xileisan Pessary group showed a decreasing trend (P<0.05, P<0.01); cervical inflammation mucosal epithelium and tissue necrosis were signally alleviated; granulocyte in the medium-dose Xileisan Pessary group showed a decreasing trend (P>0.05);the content of leucocyte hardly changed;granulocyte in the high-dose Xileisan Pessary group increased observably (P<0.01); the number of leucocyte showed an increasing trend (P>0.05), and the numbers of granulocyte and leucocyte in positive medicine group decreased observably (P<0.01), and cervical inflammation mucosal epithelium and tissue necrosis were also signally alleviated. Conclusion Xileisan Perssary can relieve the inflammation of cervix and repair injured mucosa. It has the function of treating different diseases with the same therapy.

Objective: To explore the feasibility with the safety at peri-operative and early post-operative periods for left atrial appendage occlusion in patients with non-valvular atrial ifbrillation (AF).
Methods: A total of 17 non-valvular AF patients with transesophageal echocardiography (TEE) and CAHDS2 evaluation who received left atrial appendage occlusion in our hospital were summarized. The effect and complications during peri-operative and 1 month post-operative periods were analyzed.
Results: All 17 patients had successful operation without severe complications. There were 8 patients having small amount residual shunt by TEE examination, 2 having ecchymosis near the puncture point at peri-operative period and 3 having small amount of hydropericardium by peri-cardio ultrasound examination. At the average of 45 days follow-up study, only 3 patients had small amount residual shunt, no left atrium thrombus and hydropericardium were observed.
Conclusion: Left atrial appendage occlusion has the high success rate, it is safe during peri-operative and early post-operative periods in non-valvular AF patients.