Eleven flavonol glycosides were isolated from the ethanol extract of Lysimachia clethroides by a combination of various chromatographic techniques including column chromatography over silica gel, Sephadex LH-20, and reversed-phase HPLC. Their structures were identified as astragalin (1), isoquercitrin (2), isorhamnetin-3-O-β-D-glucopyranoside (3), quercetin-3-O-β-D-6"-acetylglucopyranoside (4), quercetin-7-O-β-D-glucopyranoside (5), prunin (6), 2-hydroxynaringin-5-O-β-D-glucopyranoside (7), kaempferol-3-O-rutinonoside (8), kaempferol-3-O-robinobioside (9), rutin (10) and kaempferol-3,7-di-O-β-D-glucopyranoside (11). Among them, compounds 4, 7 and 11 were obtained from the Lysimachia genus for the first time, while compounds 3, 5 and 9 were firstly reported from this plant. In the preliminary assays, compounds 2, 6 and 8 possessed significant inhibition against aldose reduc- tase, with IC50 values of 2.69, 1.00, 1.80 μmol · L(-1), respectively; none of compounds 1-11 exhibited obvious cytotoxic activity (IC50 > 10 μmol · L(-1)).
Drugs, Chinese Herbal ; chemistry ; Flavonols ; chemistry ; Glycosides ; chemistry ; Molecular Structure ; Primulaceae ; chemistry ; Spectrometry, Mass, Electrospray Ionization

To compare the molecular characteristics of the Capsid gene and 3' untranslation region (3'UTR) of Getah viruses (GETV) isolated in Hainan Province and Hebei Province of China,the viral RNAs were extracted from M1(Hainan), HB0215-3 and HB0234(Hebei) virus stocks. Capsid gene segments and 3' UTR segments from three strains of Chinese GETV were obtained by RT-PCR and then sequenced. The obtained nucleotide sequences were analyzed using the Clustal X(1.8), DNASTAR, MAGA3.1 programs. The full-length Capsid gene of the 3 strains of Chinese GETV were comprised of 801, 804 and 804 nucleotides each, encoding the protein of 267,268 and 268 amino acids each. Sequencing of Capsid gene fragments showed that two strains of Hebei isolates were identical and had homology of 97.6% at nucleotide level and 97.8% at amino acids level with M1. Their homologies when compared with strains isolated from other countries were also high at nucleotide levels (95.4%-99.6%). The 3'UTR from the three strains were comprised of 411, 401 and 401 nucleotides each, and had found specific deletion of 10 nt at position 44-54 and two specific nucleotide sites that was T at position 64 and C at position 148. GETV isolated in China presented relation of the year of virus isolation with the phylogenesis distance when compared with the other GETV strains and comprised a genetically highly conserved group.
3' Untranslated Regions ; genetics ; Alphavirus ; classification ; genetics ; isolation & purification ; Base Sequence ; Capsid Proteins ; genetics ; China ; Molecular Sequence Data ; Phylogeny ; Sequence Homology, Nucleic Acid

OBJECTIVETo study the predictive value of ALT, HBeAg and HBV DNA levels at baseline and HBV DNA levels at week 12 adefovir dipivoxil (ADV) treatment to the efficacy of it at week 52 in patients with HBeAg-positive chronic hepatitis B (CHB).

METHODSNinety-eight HBeAg-positive CHB patients with serum HBV DNA>or=1x10(6) copies/ml and ALT levels between 1.5 to 10 times of upper limits of normal (ULN) were enrolled in the study. Ten mg/d of ADV was administered for 52 weeks. Line serum samples were collected for measuring HBV DNA and HBV markers. The efficacy of the treatment at week 52 was evaluated in patients with different ALT, HBeAg and HBV DNA levels at baseline and HBV DNA levels at week 12 after treatment.

RESULTSAt week 52 of ADV treatment, the rates of HBV DNA<10(3) were 72.7%, 66.7% and 53.0% respectively in patients with ALT>5xULN, HBeAg350 s/co (30.2%, P<0.01) and HBV DNA>10(8) copies/ml (34.4%, P<0.05) at baseline. HBeAg seroconversion rates were 42.2% and 7.5% (P<0.01) in patients with HBeAg titer350 S/co at baseline. In patients with HBV DNA<10(3), 10(3)-10(5) and >10(5) copies/ml at week 12, the ratios of them with HBV DNA<10(3) less than 1000 copies/ml at week 52 were 82.6%, 57.1% and 17.5% and significant differences were found between these groups (P<0.05); HBeAg seroconversion rates were 52.2%, 25.7% and 5.0% (P<0.05); ALT normalization rates were 100%, 83% and 75%, significantly higher in patients with HBV DNA<10(3) copies/ml than those with HBV DNA>10(5) copies/ml (P<0.05) at week 12. HBV DNA and HBeAg seroconversion at week 52 correlated with HBV DNA levels at week 12 (r=0.6 and r=0.5 respectively, P<0.01).

CONCLUSIONSIn HBeAg-positive CHB patients treated with adefovir dipivoxil, HBV DNA levels at week 12 can be used to predict the efficacy at week 52. HBV DNA<10(3) copies/ml at week 12 predict a better treatment result at week 52.

Adenine ; analogs & derivatives ; therapeutic use ; Adult ; Antiviral Agents ; therapeutic use ; DNA, Viral ; blood ; Female ; Hepatitis B e Antigens ; blood ; Hepatitis B, Chronic ; blood ; drug therapy ; Humans ; Male ; Organophosphonates ; therapeutic use ; Predictive Value of Tests ; Treatment Outcome ; Young Adult

OBJECTIVETo probe the primary characteristic of 0507JS11 virus isolated from Culex sp. and determine the classification of 0507JS11 virus in taxonomy.

METHODS0507JS11 virus was cultured in Aedes albopictus C6/36 cells and cytopathic effects (CPEs) were recorded. Electro-microscopic morphology of 0507JS11 virus was observed. Total DNA extract of 0507JS11 virus was detected by 1% Agarose Gel Electrophoresis. Complete genomic sequence of 0507JS11 virus was sequenced and then made phylogenetic analysis.

RESULTS0507JS11 virus could cause CPEs in Aedes albopictus C6/36 cells. Viral particles have no envelope and appear icosahedron symmetry with diameter of 20 nm. The genome of 0507JS11 virus was positive single strand DNA (ssDNA) with full length of 3977 nt. However, a DNA band about 4 kbp was observed in the electrophoresis of total DNA extract of 0507JS11 virus. The coding region of the genome included three ORFs, ORF1 and ORF2 code NSP1 and NSP2, ORF3 codes VP. Phylogenetic analysis of the complete genomic sequence of 0507JS11 virus indicated an independent linear in Brevidensovirus.

CONCLUSION0507JS11 virus is a new member in Brevidensovirus.

Animals ; Culex ; virology ; DNA, Viral ; genetics ; Densovirinae ; classification ; genetics ; isolation & purification ; Genome, Viral ; Sequence Analysis, DNA

OBJECTIVETo explore the effect of DNAX-associated protein 12 (DAP12) pathway on the transformation from mouse monocytes RAW264.7 to osteoclasts induced by tensile strain.

METHODSDAP12shRNA plasmid was constructed and introduced to RAW264.7 cells. Then we supplied tensile strain to RAW264.7 cells by four-point bending system. The mRNA or protein expression of DAP12, tartrate-resistant acid phosphatase (TRAP), tyrosine kinases Btk and Tec and nuclear facior of activated T cells 1 (NFATc1) was measured by reverse transcription PCR (RT-PCR) and Western blotting respectively.

RESULTSThe expression of DAP12 mRNA (0.112 ± 0.025) and protein (0.193 ± 0.015) both declined sharply after plasmid being introduced into monocytes RAW264.7 (P < 0.05). After silencing DAP12 expression in RAW264.7 cells by RNA interference, tensile strain-induced TRAP mRNA expression of RAW264.7 cells increased at 6 h (0.671 ± 0.031) and 12 h (0.800 ± 0.043) (P < 0.05), but it was weaker than non-RNA-interference-groups at each time point (P < 0.05). After silencing DAP12 expression in RAW264.7 cells by RNA interference, the expressions of Btk, Tec, NFATc1 increased as time passed (6, 12 h) (P < 0.05), but the expressions on corresponding time decreased sharply compared with those in control groups (P < 0.05).

CONCLUSIONSDAP12 pathway play an important role in regulating osteoclast differentiation induced by tensile strain.

Acid Phosphatase ; genetics ; metabolism ; Adaptor Proteins, Signal Transducing ; genetics ; metabolism ; Animals ; Cell Differentiation ; Cell Line ; Gene Expression Regulation ; Gene Silencing ; Isoenzymes ; genetics ; metabolism ; Mice ; Monocytes ; cytology ; metabolism ; NFATC Transcription Factors ; metabolism ; Osteoclasts ; cytology ; Plasmids ; Protein-Tyrosine Kinases ; metabolism ; RNA, Messenger ; metabolism ; RNA, Small Interfering ; Signal Transduction ; Tartrate-Resistant Acid Phosphatase ; Tensile Strength

BACKGROUNDEnamel demineralization occurs frequently during orthodontic treatment. In this study, we evaluated the changes of the density of mutans streptococcus (MS) in plaque after bracket bonding and using fluoride adhesive on maxillary incisors by real time fluorescence-quantitative polymerase chain reaction (RT-FQ PCR).

METHODSThe study was designed as a self-paired test. Brackets were bonded with fluoride adhesive on the left side, while non-fluoride adhesive on the right side for each patient. Plaque samples were taken from the surfaces around the brackets of four maxillary incisors before brackets bonding and after the bonding 4 weeks later. The amount of MS was measured by RT-FQ PCR. The data obtained were analyzed statistically using the SPSS 11.5 version and the alpha level was set at 0.05 (2-tailed).

RESULTSThe amount of MS in plaque increased significantly after bracket bonding (P < 0.01), whereas no significant differences were observed among four maxillary incisors both before and after brackets bonding (P > 0.05), and among the incisors using and not using fluoride adhesive (P > 0.05).

CONCLUSIONSThe increase of the density of MS in plaque after bracket bonding is one of the etiological factors for enamel demineralization in orthodontic patients. The result of this study did not support what we observed clinically that the incidence of enamel demineralization for lateral incisors was higher than that for central incisors. Using fluoride adhesive for bonding did not affect the amount of MS in plaque in our study. Further study is needed.

Adhesives ; Adolescent ; Dental Bonding ; Dental Plaque ; microbiology ; Female ; Fluorescence ; Fluorides ; administration & dosage ; Humans ; Male ; Orthodontic Brackets ; Polymerase Chain Reaction ; methods ; Streptococcus mutans ; genetics ; isolation & purification ; Tooth Demineralization

BACKGROUNDMechanical stress plays an important role in the maintenance of bone homeostasis. Current hypotheses suggest that interstitial fluid flow is an important component of the system by which tissue level strains are amplified in bone. This study aimed to test the hypothesis that the short-term and appropriate fluid shear stress (FSS) is expected to promote the terminal differentiation of pre-osteoblasts and detect the expression profile of microRNAs in the FSS-induced osteogenic differentiation in MC3T3-E1 cells.

METHODSMC3T3-E1 cells were subjected to 1 hour of FSS at 12 dyn/cm(2) using a parallel plate flow system. After FSS treatment, cytoskeleton immunohistochemical staining and microRNAs (miRNAs) were detected immediately. Osteogenic gene expression and immunohistochemical staining for collagen type I were tested at the 24th hour after treatment, alkaline phosphatase (ALP) activity assay was performed at 24th, 48th, and 72 th hours after FSS treatment, and Alizarin Red Staining was checked at day 12.

RESULTSOne hour of FSS at 12 dyn/cm(2) induced actin stress fiber formation and rearrangement, up-regulated osteogenic gene expression, increased ALP activity, promoted synthesis and secretion of type I collagen, enhanced nodule formation, and promoted terminal differentiation in MC3T3-E1 cells. During osteogenic differentiation, expression levels of miR-20a, -21, -19b, -34a, -34c, -140, and -200b in FSS-induced cells were significantly down-regulated.

CONCLUSIONThe short-term and appropriate FSS is sufficient to promote terminal differentiation of pre-osteoblasts and a group of miRNAs may be involved in FSS-induced pre-osteoblast differentiation.

Actins ; chemistry ; Alkaline Phosphatase ; metabolism ; Animals ; Cell Differentiation ; Cells, Cultured ; Collagen Type I ; biosynthesis ; Core Binding Factor Alpha 1 Subunit ; genetics ; Cyclooxygenase 2 ; genetics ; Gene Expression Profiling ; Mice ; MicroRNAs ; physiology ; Osteoblasts ; cytology ; Osteogenesis ; Stress, Mechanical ; Stress, Physiological

Objective To analyze the prognosis of pediatric burns and its influencing factors. Methods Clinical data of 1 737 children with burns from January 2013 to December 2017 in the First Affiliated Hospital of Anhui Medical University was analyzed by retrospective method. The demographic, clinical features, and related factors affecting prognosis . Results Log-binominal regression model showed that the care rate was higher in children aged 1- and 3- compared with children aged 7-12 (all P<0.05); Boiling water burns had a higher care rate than electric shock and flame burns (including chemical burn) (all P<0.05); Moderate and severe burns had a higher care rate than heavy severe burns (all P<0.05); The unhealed rate of pediatric burns in summer was higher than burned in winter (RR=0.861,95% CI:0.690-1.074); Children without complications had a higher care rate (P<0.05); Children lived in rural areas have a higher unhealed rate than lived in urban areas (RR=0.713，95% CI:0.618-0.824). Conclusions The care rate of pediatric burns was 51.1%. Major influencing factors included children aged 7-12, burned by electric and flame (including chemical burns), burned severe extraordinarily, burned in summer, and with complications, lived in rural.

OBJECTIVETo isolate Japanese encephalitis virus (JEV) from mosquitoes collected in Liaoning province and analysis the genotype of new isolated JEV strains and the characters of nucleotide and amino acid in the E gene.

METHODSCollected mosquitoes in Dandong Liaoning Province in August, 2006. Virus isolation was using issue culture cells. Isolated viruses were identified by using serological and molecular methods.

RESULTSTwo new JEV strains, LNDG07-02 and LNDG07-16, were isolated from 1500 mosquitoes were belonging to genotype 1. The identity of nucleotide and amino acid of E gene between new JEV strains and live attenuated vaccine strain SA14-14-2 were 87.8-88% and 97.2%, respectively. Total 11 amino acid sites were differences in E gene between new isolates and SA14-14-2. However, there were no differentiation between the new JEV strains and the isolates in Donggang 2002.

CONCLUSIONGenotype 1 JEV was isolated again from Donggang, since the first isolation of this genotype in 2002. Genotype 1 JEV continues in existence in Donggang Liaoning Province.

Amino Acid Sequence ; Animals ; Brain ; pathology ; virology ; Cell Line ; China ; epidemiology ; Culicidae ; virology ; Encephalitis Virus, Japanese ; classification ; genetics ; isolation & purification ; Encephalitis, Japanese ; epidemiology ; virology ; Female ; Genotype ; Insect Vectors ; virology ; Male ; Mice ; Molecular Sequence Data ; Phylogeny ; RNA, Viral ; genetics ; Sequence Analysis, DNA

China ; epidemiology ; Encephalitis, Japanese ; epidemiology ; Laboratories ; standards