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ObjectiveTo determine the human papillomavirus (HPV) infection status and possible influencing factors among healthy women aged 18‒45 years, and to provide a scientific evidence for the prevention of HPV infection and cervical cancer.MethodsA total of 23 HPV types were examined by PCR-reverse dot blot hybridization in 1 210 healthy women who voluntarily participated in the study. Infection status of each HPV genotype and possible factors associated with the infection were determined, including age, ethnicity, marital history, pregnancy history, number of sexual partners, and age at first sexual intercourse.ResultsA total of 1 210 healthy women were examined, of which 267 tested positive for HPV, with a prevalence of 22.07%. The prevalence did not differ significantly across age groups or ethnicities (all P>0.05). Moreover, the highest prevalence was found in the divorced/widowed participants (53.57%), compared with other marital status (χ2=35.16, P

Abstract Background The purpose of this study was to analyze myopic regression after corneal refractive surgery (CRS) in civilian pilots and to explore the factors that may cause long-term myopic regression. Methods We included civilian pilots who had undergone CRS to correct their myopia and who had at least 5 years of follow-up. We collected retrospective data and completed eye examinations and a questionnaire to assess their eye habits. Results A total of 236 eyes were evaluated in this study. 211 eyes had Intrastromal ablations (167 eyes had laser in situ keratomileusis, LASIK, 44 eyes had small incision lenticule extraction, SMILE) and 25 eyes had subepithelial ablations (15 eyes had laser epithelial keratomileusis, LASEK and 10 eyes had photorefractive keratectomy, PRK). The mean preoperative spherical equivalent (SE) was − 2.92 ± 1.11 D (range from − 1.00 to -5.00 D). A total of 56 eyes (23.6%) suffered from myopic regression after CRS. Comparisons of individual and eye characteristics between the regression and non-regression groups revealed statistically significant differences in age, cumulative flight time, postoperative SE (at 6 months and current), uncorrected visual acuity (UCVA), accommodative amplitude (AA), positive relative accommodation (PRA), postoperative period, types of CRS and eye habits. Generalized propensity score weighting (GPSW) was used to balance the distribution of covariates among different age levels, types of CRS, cumulative flying time, postoperative period and continuous near-work time. The results of GPS weighted logistic regression demonstrated that the associations between age and myopic regression, types of CRS and myopic regression, continuous near-work time and myopic regression were significant. Cumulative flying time and myopic regression, postoperative period and myopic regression were no significant. Specifically, the odds ratio (OR) for age was 1.151 (P = 0.022), and the OR for type of CRS was 2.769 (P 45 min and poor accommodative function may be related factors in this specific population.

Objective To explore the regulative mechanism of hypoxia/reoxygen (H/R) for invasion ability of extravillous trophoblast (EVT). Methods Immortalized human EVT cell line HTR-8/SVneo in early pregnancy, primary EVT cells isolated from the villi of placenta in early pregnancy, and villi explants were cultured respectively. A simulation model of H/R environment in EVT cells invading the uterus was established under the conversion conditions of 1% O2 for 24 h to 20% O2 for another 24 h. Western blotting and immunofluorescence assay were used to detect the expression of key factors such as cell invasion, and Transwell chamber test was employed to observe cell migration and invasion. Results After H/R induction, the migration and invasion abilities of HTR-8/SVneo cells were weakened, and the epitaxial ability of cultured villi explants and the migration and invasion abilities of isolated primary EVT cells were also weakened. Under H/R conditions, the expression levels of MMP-2 and MMP-9, integrin-β1 and integrin-α5 were decreased in HTR-8/SVneo cells (P < 0.05), and the protein expression of DNA methyltransferase (DNMTs) was also down-regulated (P < 0.01). In the primary EVT cells under H/R condition, the expression levels of epithelial-mesenchymal transition (EMT) positive regulatory factors, Slug and Snails, were inhibited (P < 0.05), that of epithelial cell marker E-cadherin was increased (P < 0.01), protein levels of MMP-2 and MMP-9, integrin-β1 and integrin-α5 were decreased (P < 0.05), and cell invasion ability was reduced along with decreased DNMT1 and DNMT3A expression (P < 0.05). However, overexpression of DNMT1, DNMT3A and DNMT3B in HTR-8/SVneo cells promoted the up-regulation of interstitial markers N-cadherin, and MMP-2 and MMP-9 (P < 0.05). Conclusion H/R regulates the expression of EMT-related factors such as MMP-2/-9 through DNMTs, and thereby reduces the migration and invasion abilities of EVT cells.

In view of problem that traditional wire temperature measurement method cannot be applied in high-voltage switchgear because of high-voltage insulation, a wireless temperature measurement system of high-voltage switchgear was designed. Designs of hardware and software of the system were introduced in details, existing problems of the system in test process were analyzed and corresponding optimal measures were given. The test result showed that the system can steadily run in working environment and meet requirement of free maintenance in 2 a with once installation.

In order to access IED which do not support IEC61850 standard into integrated automation system of substation with IEC61850 communication system, the paper introduced overall design schemes of software and hardware of a communication manager of substation based on analysis of function requirements and application mode in communication system of substation of the communication manager. The communication manager is designed by use of Atom 230 microprocessor and Linux embedded operation system, which has multi network ports and multi serial ports for accessing all kinds of IEDs, and has function of converting traditional communication protocols into IEC61850 protocol.

Abstract Background Rabies virus (RV), the agent of rabies, can cause a severe encephalomyelitis in several species of mammals, including humans. As a human rabies vaccine strain employed in China, the genetic knowledge of the aG strain has not been fully studied. The main goal of the present study is to amplify the whole genome of aG strain, and genetic relationships between other vaccine strains and wild strains were analyzed. Results The entire genome of human rabies virus vaccine strain aG employed in China was sequenced; this is the second rabies virus vaccine strain from China to be fully characterized. The overall organization and the length of the genome were similar to that of other lyssaviruses. The length of aG strain was 11925nt, comprising a leader sequence of 58nt, nucleoprotein (N) gene of 1353nt, phosphoprotein (P) gene of 894 nt, matrix protein (M) gene of 609nt, glycoprotein (G) gene of 1575nt, RNA-dependent RNA polymerase (RdRp,L) gene of 6384nt, and a trailer region of 70 nt. There was TGAAAAAAA (TGA7) consensus sequence in the end of each gene, except AGA7 at the end of G gene. There was AACAYYYCT consensus start signal at the beginning of each gene. Conclusions In this report, we analyzed the full genome of China human rabies vaccine strain aG. Our studies indicated that the genome of aG retained the basic characteristics of RV. At gene level, N was the most conserved among the five coding genes, indicating this gene is the most appropriate for quantitative genotype definition. The phylogenetic analysis of the N indicated the aG strain clustered most closely with Japanese and Russian rabies vaccine strains, suggesting that they may share the same ancestor; also, the aG strain did not share high homology with wild strains isolated from China, making it may not be the best vaccine strain, more research is needed to elucidate the genetic relationship among the RV circulating in China.

Abstract Background Neuroinflammation has been known to play a critical role in the pathogenesis of Alzheimer's disease (AD). Activation of microglia and astrocytes is a characteristic of brain inflammation. Epidemiological studies have shown that long-term use of non-steroidal anti-inflammatory drugs (NSAIDs) delays the onset of AD and suppresses its progression. Methyl salicylate-2-O-β-D-lactoside (DL0309) is a new molecule chemically related to salicylic acid. The present study aimed to evaluate the anti-inflammatory effects of DL0309. Findings Our studies show that DL0309 significantly inhibits lipopolysaccharide (LPS)-induced release of the pro-inflammatory cytokines IL-6, IL-1β, and TNF-α; and the expression of the inflammation-related proteins iNOS, COX-1, and COX-2 by microglia and astrocytes. At a concentration of 10 μM, DL0309 prominently inhibited LPS-induced activation of NF-κB in glial cells by blocking phosphorylation of IKK and p65, and by blocking IκB degradation. Conclusions We demonstrate here for the first time that DL0309 exerts anti-inflammatory effects in glial cells by suppressing different pro-inflammatory cytokines and iNOS/NO. Furthermore, it also regulates the NF-κB signaling pathway by blocking IKK and p65 activation and IκB degradation. DL0309 also acts as a non-selective COX inhibitor in glial cells. These studies suggest that DL0309 may be effective in the treatment of neuroinflammatory disorders, including AD.