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1.
Viruses ; 11(8)2019 Jul 31.
Artigo em Inglês | MEDLINE | ID: mdl-31370205

RESUMO

An emerging virus-like flower yellowing disease (FYD) of green Sichuan pepper (Zanthoxylum armatum v. novemfolius) has been recently reported. Four new RNA viruses were discovered in the FYD-affected plant by the virome analysis using high-throughput sequencing of transcriptome and small RNAs. The complete genomes were determined, and based on the sequence and phylogenetic analysis, they are considered to be new members of the genera Nepovirus (Secoviridae), Idaeovirus (unassigned), Enamovirus (Luteoviridae), and Nucleorhabdovirus (Rhabdoviridae), respectively. Therefore, the tentative names corresponding to these viruses are green Sichuan pepper-nepovirus (GSPNeV), -idaeovirus (GSPIV), -enamovirus (GSPEV), and -nucleorhabdovirus (GSPNuV). The viral population analysis showed that GSPNeV and GSPIV were dominant in the virome. The small RNA profiles of these viruses are in accordance with the typical virus-plant interaction model for Arabidopsis thaliana. Rapid and sensitive RT-PCR assays were developed for viral detection, and used to access the geographical distributions. The results revealed a correlation between GSPNeV and the FYD. The viruses pose potential threats to the normal production of green Sichuan pepper in the affected areas due to their natural transmission and wide spread in fields. Collectively, our results provide useful information regarding taxonomy, transmission and pathogenicity of the viruses as well as management of the FYD.

2.
Artigo em Inglês | MEDLINE | ID: mdl-31409552

RESUMO

We described a 55-year-old man, in whom the first manifestation of retroperitoneal fibrosis (RPF) was only coronary arterial involvement, which had no periaortic or peri-iliac and urinary system retroperitoneum involvement in general and other systemic clinical manifestations. Coronary manifestation was called "mistletoe sign" on the images. Here, we report a case of IgG4-related RPF remission that was only coronary arterial involvement after treatment.

3.
Arch Virol ; 2019 Jul 18.
Artigo em Inglês | MEDLINE | ID: mdl-31321586

RESUMO

A new virus with a circular double-stranded DNA genome was discovered in green Sichuan pepper with vein clearing symptoms. Its complete genome of 8,014 bp contains three open reading frames (ORF) on the plus strand, which is typical of members of the genus Badnavirus in the family Caulimoviridae. Sequence comparisons revealed that the new virus has the highest nucleotide sequence identity with grapevine vein-clearing virus (GVCV). In particular, the identity of the two viruses in the ORF3 RT-RNase H region is 71.9%, which is below the species demarcation cutoff of 80% for badnaviruses. Phylogenetic analysis also placed the new virus with GVCV in a cluster. The virus was tentatively named "green Sichuan pepper vein clearing-associated virus" (GSPVCaV). The geographical distribution and genetic diversity of GSPVCaV were studied. Another isolate was found to be highly divergent.

4.
Cell Res ; 29(8): 666-679, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31201383

RESUMO

Oriented cell divisions are controlled by a conserved molecular cascade involving Gαi, LGN, and NuMA. Here, we show that NDP52 regulates spindle orientation via remodeling the polar cortical actin cytoskeleton. siRNA-mediated NDP52 suppression surprisingly revealed a ring-like compact subcortical F-actin architecture surrounding the spindle in prophase/prometaphase cells, which resulted in severe defects of astral microtubule growth and an aberrant spindle orientation. Remarkably, NDP52 recruited the actin assembly factor N-WASP and regulated the dynamics of the subcortical F-actin ring in mitotic cells. Mechanistically, NDP52 was found to bind to phosphatidic acid-containing vesicles, which absorbed cytoplasmic N-WASP to regulate local filamentous actin growth at the polar cortex. Our TIRFM analyses revealed that NDP52-containing vesicles anchored N-WASP and shortened the length of actin filaments in vitro. Based on these results we propose that NDP52-containing vesicles regulate cortical actin dynamics through N-WASP to accomplish a spatiotemporal regulation between astral microtubules and the actin network for proper spindle orientation and precise chromosome segregation. In this way, intracellular vesicles cooperate with microtubules and actin filaments to regulate proper mitotic progression. Since NDP52 is absent from yeast, we reason that metazoans have evolved an elaborate spindle positioning machinery to ensure accurate chromosome segregation in mitosis.

5.
Biochem Biophys Res Commun ; 515(1): 37-43, 2019 Jul 12.
Artigo em Inglês | MEDLINE | ID: mdl-31122697

RESUMO

miR-613 has been demonstrated to play critical roles in tumorigenesis and progression of a various type of cancers. However, its role and expression significance remain unclear in gastric cancer (GC). We detected the expression of miR-613 in 176 paired GC tissues and adjacent normal tissues, and found that miR-613 was significantly downregulated in GC tissues and its downregulation was correlated with T stage, lymph node invasion and advanced AJCC stages. Moreover, miR-613 expression could be an independent prognostic factor of GC. Biological function analysis indicated that miR-613 inhibited cell proliferation and invasion. Further analysis suggested that miR-613 inhibited Warburg effect of GC cells. Mechanically, we identified that miR-613 could directly bind to the 3'UTR of PFKFB2, thereby suppressing the expression of PFKFB2, which in turn, regulating glycolysis metabolism and cell growth. In conclusion, miR-613 served as a tumor suppressor by targeting PFKFB2, indicating that detecting miR-613 and modulation of miR-613 expression could be potential marker and clinical approach in GC patients.

6.
ACS Appl Mater Interfaces ; 11(24): 22015-22020, 2019 Jun 19.
Artigo em Inglês | MEDLINE | ID: mdl-31132240

RESUMO

Symmetric continuously tunable three-dimensional (3D) liquid photonic crystals have been investigated using self-organized blue-phase liquid crystal films. The photonic band gap in the overall visible spectrum can be tuned continuously, reversibly, and rapidly as the applied electric field changes. After driven by the applied field, four-time enhancement of the reflectivity results in more vivid reflection colors. A lasing emission of tuning working wavelength has been demonstrated by using the dye-doped blue-phase liquid crystal film. With the advantages of fast response speed, no alignment layer, large-scale electrically shift of the photonic band gap, and macro optical isotropy, this self-assembled soft material has many potential applications in high-performance reflective full-color display, 3D tunable lasers, and nonlinear optics.

7.
FEBS Lett ; 593(10): 1040-1049, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-31002393

RESUMO

Transcriptional regulation involves a series of sophisticated protein-protein and protein-DNA interactions (PPI and PDI). Some transcriptional complexes, such as c-Fos/c-Jun and their binding DNA fragments, have been conserved over the past one billion years. Considering the thermodynamic principle for transcriptional complex formation, we hypothesized that the c-Fos/c-Jun complex may represent a thermodynamic summit in the evolutionary space. To test this, we invented a new method, termed One-Pot-seq, which combines cDNA display and proximity ligation to analyse PPI/PDI complexes simultaneously. We found that the wild-type c-Fos/c-Jun complex is indeed the most thermodynamically stable relative to various mutants of c-Fos/c-Jun and binding DNA fragments. Our method also provides a universal approach to detect transcriptional complexes and explore transcriptional regulation mechanisms.

8.
J Nanosci Nanotechnol ; 19(9): 5900-5905, 2019 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-30961756

RESUMO

A simple and efficient method is proposed for the synthesis of bimetallic AuPd nanowire networks (NWs) with tunable compositions by using KBr as a structure-directing agent and NaBH4 as a reducing agent. TEM, XRD and XPS results show that the AuPd NWs have a unique one-dimensional network structure. Electrochemical tests indicate that the AuPd NWs catalysts have excellent electrocatalytic activity and durability for methanol oxidation due to the special one-dimensional nanostructure and many structural defects at the junction. The Au1Pd1 NWs show better catalytic activity, which is 2.03 times higher than that of the commercial Pd/C catalyst.

9.
Zhongguo Dang Dai Er Ke Za Zhi ; 21(2): 144-149, 2019 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-30782276

RESUMO

OBJECTIVE: To study the features of pathogens in children with lower respiratory tract infection. METHODS: A total of 108 children who were hospitalized due to lower respiratory tract infection and underwent fiber bronchoscopy between January 2017 and June 2018 were enrolled. Bronchoalveolar lavage fluid samples were collected. Multiple quantitative real-time PCR was performed to detect pathogens. RESULTS: Of the108 children, 85 (78.7%) were found to have pathogens, among whom 52 (48.1%) had single pathogen infection and 33 (30.6%) had multiple pathogen infections. Mycoplasma pneumoniae was detected in 38 children (35.2%), and was the most common pathogen. The children aged 36 - <72 months had the highest detection rate of Mycoplasma pneumoniae. Both Streptococcus pneumoniae and Haemophilus influenzae were detected in 29 children (26.9%) and Streptococcus pneumoniae was mainly detected in children aged <24 months. Each of Acinetobacter baumannii, Candida albicans and Klebsiella pneumoniae was detected in 3 children. Among the 31 children with bronchopneumonia, 9 were found to have Haemophilus influenza, with the highest detection rate of 29%. Among the 34 children with lobar pneumonia, 22 were found to have Mycoplasma pneumoniae, with the highest detection rate of 65%. Among the 22 children with bronchial foreign bodies and bronchopneumonia, 10 were found to have Streptococcus pneumoniae, with the highest detection rate of 45%. CONCLUSIONS: In children with lower respiratory tract infection, Mycoplasma pneumoniae is the most common pathogen, followed by Streptococcus pneumoniae and Haemophilus influenzae. There are differences in the detection rates of pathogens between children with different ages and different types of lower respiratory tract infection.


Assuntos
Infecções Respiratórias , Líquido da Lavagem Broncoalveolar , Criança , Pré-Escolar , Haemophilus influenzae , Humanos , Lactente , Mycoplasma pneumoniae , Streptococcus pneumoniae
10.
Dalton Trans ; 48(3): 1051-1059, 2019 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-30601501

RESUMO

A covalent organic framework (COF) featuring a unique light porous structure and silver nanoparticles shows high efficiency in the degradation of environmental pollutants. However, the combination of a COF with silver nanoparticles has never been reported until now. Toward this end, 2,4,6-tris-(4-formylphenoxy)-1,3,5-triazine (TPT-CHO) and hydrazine hydrate were selected as the construction units of the COF material (TPHH-COF), which possesses rich nitrogen and oxygen sites. Then a new type of composite catalyst (Ag@TPHH-COF) was successfully obtained by solution infiltration. The obtained materials were also fully characterized by standard methods. The results showed that the silver nanoparticles (with diameters of 5 ± 3 nm) were uniformly dispersed on the surface and in the interlayer gaps of the TPHH-COF substrate. Catalytic studies showed that Ag@TPHH-COF could catalyze the reduction of the various nitroaromatic compounds (NACs) with high efficiency, such as 4-nitrophenol, 2-nitrophenol, 4-nitroaniline, nitrobenzene, 4-nitrotoluene and 1-butyl-4-nitrobenzene. Ag@TPHH-COF could also catalyze the reduction of organic dyes such as Rhodamine B (RhB), Methylene Blue (MB), Methyl Orange (MO) and Congo Red (CR). Moreover, Ag@TPHH-COF has good reusability and high recovery.

11.
J Cell Mol Med ; 23(3): 1698-1713, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30637920

RESUMO

Tumour necrosis factor-α-induced protein 8-like 2 (TIPE2) is a tumour suppressor in many types of cancer. However, the mechanism of action of TIPE2 on the growth of rectal adenocarcinoma is unknown. Our results showed that the expression levels of TIPE2 in human rectal adenocarcinoma tissues were higher than those in adjacent non-tumour tissues. Overexpression of TIPE2 reduced the proliferation, migration, and invasion of human rectal adenocarcinoma cells and down-regulation of TIPE2 showed reverse effects. TIPE2 overexpression increased apoptosis through down-regulating the expression levels of Wnt3a, phospho (p)-ß-Catenin, and p-glycogen synthase kinase-3ß in rectal adenocarcinoma cells, however, TIPE2 knockdown exhibited reverse trends. TIPE2 overexpression decreased autophagy by reducing the expression levels of p-Smad2, p-Smad3, and transforming growth factor-beta (TGF-ß) in rectal adenocarcinoma cells, however, TIPE2 knockdown showed opposite effects. Furthermore, TIPE2 overexpression reduced the growth of xenografted human rectal adenocarcinoma, whereas TIPE2 knockdown promoted the growth of rectal adenocarcinoma tumours by modulating angiogenesis. In conclusion, TIPE2 could regulate the proliferation, migration, and invasion of human rectal adenocarcinoma cells through Wnt/ß-Catenin and TGF-ß/Smad2/3 signalling pathways. TIPE2 is a potential therapeutic target for the treatment of rectal adenocarcinoma.

12.
Bioorg Chem ; 85: 325-336, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30658232

RESUMO

In the scientific field, nanotechnology has offered multipurpose and designated functional nanoparticles (NPs) for the development of applications in nano-medicine. This present review focuses on cutting edge of nanotechnology in biomedical applications as drug carries in cancer treatment. The nanotechnology overcomes several limitations of drug delivery systems used in distinct therapeutic approaches of cancer treatment. The serious effect of conventional chemotherapeutics by nonspecific targeting, the lack of solubility, and the inability of chemotherapeutics entry to cancer cells which, offers a great opportunity for nanotechnology to play significant roles in cancer biology. The selective delivery of nano-drugs to the targeted cancer cells by the programmed way and avoiding nonspecific interactions to the healthy cells. The present review focuses on the methods of improving the size, shape and characteristics of nanomaterials which can be exploited for cancer therapy. The successful designing of nanocarriers can be tailored for cancer treatment for upcoming future as nano-medicines.

13.
Artigo em Inglês | MEDLINE | ID: mdl-30503343

RESUMO

PROBLEM: Recurrent spontaneous abortion (RSA) is associated with immune imbalance at the maternal-fetal interface. Decidual immune cells and cytokines expressed at this interface regulate the response of the maternal immune system to the fetus. However, the populations and cytokine expression levels of these lymphocytes in miscarriage with normal and abnormal chromosome karyotypes remain unclear. METHODS: We assessed the populations and cytokine expression levels of Natural Killer (NK), Natural Killer T (NKT), Helper T (Th) and Cytotoxic T (Tc) cells in the decidua of RSA by flow cytometry and simultaneously analyzed the fetal chromosome karyotypes of these miscarriages. RESULTS: Flow cytometry showed no significant difference between RSA and normal pregnancy in the percentages of Th, Tc, NK, and NKT cells. Type-1 cells decreased significantly in the decidua of normal pregnancy, and NK2 and NKT2 cells increased significantly in the normal pregnancy group. We also found no difference in the lymphocyte composition and the proportion of types 1 and 2 subsets of the four lymphocytes in the decidua between RSA with abnormal chromosome karyotypes of villous trophoblasts (RSA-A) and RSA with normal chromosome karyotypes of villous trophoblasts (RSA-N), but the proportion of type-1 cells in both groups was significantly higher than that in normal pregnancy. CONCLUSION: No difference existed between the type-1 immune response of RSA in normal and abnormal chromosome karyotypes of villous trophoblasts.

14.
Front Immunol ; 9: 2812, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30564234

RESUMO

Given the high mortality rate (>50%) and potential danger of intrapersonal transmission, highly pathogenic avian influenza (HPAI) H5N1 epidemics still pose a significant threat to humans. γδ T cells, which participate on the front line of the host immune defense, demonstrate both innate, and adaptive characteristics in their immune response and have potent antiviral activity against various viruses. However, the roles of γδ T cells in HPAI H5N1 viral infection remain unclear. In this study, we found that γδ T cells provided a crucial protective function in the defense against HPAI H5N1 viral infection. HPAI H5N1 viruses could directly activate γδ T cells, leading to enhanced CD69 expression and IFN-γ secretion. Importantly, we found that the trimer but not the monomer of HPAI H5N1 virus hemagglutinin (HA) proteins could directly activate γδ T cells. HA-induced γδ T cell activation was dependent on both sialic acid receptors and HA glycosylation, and this activation could be inhibited by the phosphatase calcineurin inhibitor cyclosporin A but not by the phosphatidylinositol 3-kinase (PI3-K) inhibitors wortmannin and LY294002. Our findings provide a further understanding the mechanism underlying γδ T cell-mediated innate and adoptive immune responses against HPAI H5N1 viral infection, which helps to develop novel therapeutic strategies for the treatment of H5N1 infection in the future.

15.
Int J Mol Sci ; 19(12)2018 Dec 14.
Artigo em Inglês | MEDLINE | ID: mdl-30558106

RESUMO

Plant plastomes play crucial roles in species evolution and phylogenetic reconstruction studies due to being maternally inherited and due to the moderate evolutionary rate of genomes. However, patterns of sequence divergence and molecular evolution of the plastid genomes in the horticulturally- and economically-important Lonicera L. species are poorly understood. In this study, we collected the complete plastomes of seven Lonicera species and determined the various repeat sequence variations and protein sequence evolution by comparative genomic analysis. A total of 498 repeats were identified in plastid genomes, which included tandem (130), dispersed (277), and palindromic (91) types of repeat variations. Simple sequence repeat (SSR) elements analysis indicated the enriched SSRs in seven genomes to be mononucleotides, followed by tetra-nucleotides, dinucleotides, tri-nucleotides, hex-nucleotides, and penta-nucleotides. We identified 18 divergence hotspot regions (rps15, rps16, rps18, rpl23, psaJ, infA, ycf1, trnN-GUU-ndhF, rpoC2-rpoC1, rbcL-psaI, trnI-CAU-ycf2, psbZ-trnG-UCC, trnK-UUU-rps16, infA-rps8, rpl14-rpl16, trnV-GAC-rrn16, trnL-UAA intron, and rps12-clpP) that could be used as the potential molecular genetic markers for the further study of population genetics and phylogenetic evolution of Lonicera species. We found that a large number of repeat sequences were distributed in the divergence hotspots of plastid genomes. Interestingly, 16 genes were determined under positive selection, which included four genes for the subunits of ribosome proteins (rps7, rpl2, rpl16, and rpl22), three genes for the subunits of photosystem proteins (psaJ, psbC, and ycf4), three NADH oxidoreductase genes (ndhB, ndhH, and ndhK), two subunits of ATP genes (atpA and atpB), and four other genes (infA, rbcL, ycf1, and ycf2). Phylogenetic analysis based on the whole plastome demonstrated that the seven Lonicera species form a highly-supported monophyletic clade. The availability of these plastid genomes provides important genetic information for further species identification and biological research on Lonicera.


Assuntos
Genomas de Plastídeos , Sequenciamento de Nucleotídeos em Larga Escala/métodos , Lonicera/genética , Análise de Sequência de DNA/métodos , Evolução Molecular , Variação Genética , Tamanho do Genoma , Repetições de Microssatélites , Fotossíntese , Filogenia , Seleção Genética
16.
Artigo em Inglês | MEDLINE | ID: mdl-30461257

RESUMO

Sodium ions batteries (SIBs) was regarded as one of the most promising energy storage systems, but the choice of anode material was still facing great challenges. Biomass carbon materials were explored for their low cost and wide range of sources. Here, a hard carbon material with a "honeycomb" structure using pine pollen as a precursor was successfully prepared and applied as an anode. The initial discharge capacity can reach to 370 mA h g-1 at a current density of 0.1 A g-1. After cycling 200 times, the reversible capacity also stabled at 203.3 mA h g-1 with the retention rate of 98%. We further studied the sodium storage mechanism by different methods, especially the Na+ diffusivity coefficient (DNa+) calculated by galvanostatic intermittent titration technique (GITT), it was more accurate. Interestingly, the trend of DNa+ coincides with cyclic voltammetry (CV) curves. Carbonized pine pollen (CPP) exhibited excellent electrochemical properties due to its three-dimensional structure and larger layer spacing (~ 0.41 nm), which reduces the resistance of sodium ions to intercalation and deintercalation.

17.
Nat Commun ; 9(1): 4766, 2018 11 13.
Artigo em Inglês | MEDLINE | ID: mdl-30425246

RESUMO

This Article contains errors in Supplementary Table 3, which are described in the Author Correction associated with this Article. The simulation results in the Article were based on the correct formula and thus the results are not affected by this correction. The errors have not been fixed in the original Article.

18.
Sensors (Basel) ; 18(11)2018 Oct 29.
Artigo em Inglês | MEDLINE | ID: mdl-30380677

RESUMO

Consensus filtering is an effective method for distributed state estimation of distributed sensor networks and the assumption of white measurement noise is widely used. However, when the measurement noise is colored, the traditional consensus filter cannot work well. In this paper, we first propose a consensus-based distributed filter for colored measurement noise by augmenting the state to include the colored measurement noise. To improve the efficiency of the filter, only local colored measurement noise is integrated into the augmented state for each local filter. Furthermore, another consensus-based distributed filter based on measurement differencing scheme is developed to eliminate the ill-conditioned computations of the augmented state approach. In addition, this method does not need to augment the state and thus has lower dimension than the augmented state filter. Simulation results demonstrate the superiority of the proposed methods.

19.
Dalton Trans ; 47(35): 12406-12413, 2018 Sep 11.
Artigo em Inglês | MEDLINE | ID: mdl-30128445

RESUMO

Crystalline materials with multi-catalytic applications are of great value to both fundamental research and practical applications. The platform of metal-organic frameworks (MOFs) is utilized to fabricate a microporous versatile catalyst with high stability. Self-assembly of a flexible ligand, 4-(4-carboxybenzylamino)benzoic acid (H2CBBA), with Co(ii) resulted in a 3D framework, CBBA-Co, with Co3O clusters exposed in the zigzag channels. Upon in situ activation, CBBA-Co exhibited multiple heterogeneous catalytic activities. Theoretical calculations were carried out to give insights into the catalytic process. In addition, CBBA-Co also showed promising potential in optical sensing by virtue of its catalytic activity. The luminol chemiluminescence was greatly enhanced by CBBA-Co, and linear determination of the concentration of H2O2 in the range of 0-30% was established. The successful implementation of CBBA-Co indicates the feasibility and promising future of employing MOFs as an efficient platform for the fabrication and study of multifunctional catalysts, both experimentally and theoretically.

20.
J Med Econ ; 21(12): 1150-1158, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30134758

RESUMO

PURPOSE: Targeted therapies, including sunitinib, sorafenib, axitinib, and everolimus, have recently become the mainstay for the treatment of metastatic renal cell carcinoma (mRCC). The objective of this study was to estimate the costs of sequential treatment regimens for mRCC and associated adverse events (AEs) from the Chinese payers' perspective. METHODS: Key inputs included in the calculation were patient population, dosing information, incidence rates and associated costs of Grade 3/4 AEs, treatment costs (including drug discount programs), and patients' progression-free survival (PFS) as a proxy for length of treatment. To calculate PFS, this study identified pivotal clinical trials and generated a reconstructed individual patient data set from the published Kaplan-Meier survival curves. The median PFS from the pooled estimates were used in the calculation. In the base-case scenario, sunitinib was used as first line and the other three therapies were used as second line. Sensitivity analyses were conducted where (1) sorafenib was used as first line, or (2) a third-line therapy was added to the base-case scenario. RESULTS: In the base case, the cost per patient per treatment month (PPPM) cost was the lowest for sunitinib + axitinib among all sequential regimens (¥14,898) and was the highest for sunitinib + sorafenib (¥20,103). If sorafenib is used as first line, everolimus had lower per patient per months (PPPM) cost than axitinib (¥17,046 vs ¥23,337), but also had shorter PFS (13.5 months vs 15 months). Second sensitivity analysis with an additional third-line therapy showed consistent results with the base-case scenario; axitinib as second line was the least costly. CONCLUSIONS: This study demonstrates that, for mRCC sequential treatment, sunitinib followed by axitinib generates the highest cost savings from the Chinese payers' perspective. Future studies are warranted to examine the cost-effectiveness of various mRCC treatment regimens in Chinese populations.

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