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  • BioMed Central  (13)
  • Wiley-Blackwell  (10)
  • Macmillian Magazines Ltd.  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Therapeutic silencing of an endogenous gene by systemic administration of modified siRNAs (2004)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 432 (2004), S. 173-178 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] RNA interference (RNAi) holds considerable promise as a therapeutic approach to silence disease-causing genes, particularly those that encode so-called ‘non-druggable’ targets that are not amenable to conventional therapeutics such as small molecules, proteins, or monoclonal antibodies. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature03121
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    Paper (German National Licenses)
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  • 2
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    Construction and Properties of Two MOFs Based on 2-p-Bromophenyl Imidazole Dicarboxylate (2015)
    Wiley-Blackwell
    Details
    Publication Date: 2015-02-24
    Description: To further explore the coordination ability of an multi-functional ligand 2-( p -bromophenyl)-1 H -imidazole-4,5-dicarboxylic acid ( p -BrPhH 3 IDC), two metal-organic frameworks [Mn(μ 2 - p -BrPhH 2 IDC) 2 ] n ( I ) and {[Pb(μ 2 - p -BrPhH 2 IDC) 2 ] · H 2 O} n ( II ) were synthesized under hydro(solvo)thermal conditions and structurally characterized by elemental analyses, IR spectroscsopy, and single-crystal X-ray diffraction. Polymer I shows a 2D sheet structure. In polymer II , 1D octagonal channels are connected by the organic ligands to form a 3D architecture. Furthermore, the thermal characteristics of the two polymers and the coordination features of p -BrPhH 3 IDC were investigated.
    Print ISSN: 0044-2313
    Electronic ISSN: 1521-3749
    Topics: Chemistry and Pharmacology
    Published by Wiley-Blackwell
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  • 3
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    Molecular characterization and application of a novel cytoplasmic male sterility-associated mitochondrial sequence in rice (2015)
    BioMed Central
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    Publication Date: 2015-05-01
    Description: Background: Cytoplasmic male sterility (CMS) is a maternally inherited inability to produce functional pollen found in numerous flowering plant species. CMS is associated with mitochondrial DNA mutation, novel chimeric open reading frames (ORFs), and rearrangement of coding and noncoding regions of the mitochondrial genome. Results: BLAST (Basic Local Alignment Search Tool) analysis indicated that L-sp1, a new sequence-characterized amplified region, is non-homologous to atp6-orfH79 (or atp6-orf79) and WA352 cloned CMS-associated genes. L-sp1 was found in 11 of 102 wild rice accessions belonging to four AA genome species: Oryza rufipogon, Oryza nivara, Oryza glumaepatula, and Oryza meridionalis. Using L-sp1, two new CMS lines were developed, from either low natural fertility plants or sterile plants, by backcrossing BC1F1 with Yuetai B. Northern blot and RT-PCR revealed that L-sp1 was only expressed in the anthers of w1/YTB, w2/YTB, w1/YTB//YTB, and w2/YTB//YTB when in the same cytoplasm background. Conclusions: L-sp1 is a single-copy chimeric CMS-associated gene found in the mitochondrial genome. It can be expressed in anthers with the same specific cytoplasm background, and will be a useful molecular marker for the development and marker-assisted selection of new CMS lines.
    Electronic ISSN: 1471-2156
    Topics: Biology
    Published by BioMed Central
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  • 4
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    Syntheses, Crystal Structures, and Properties of a Salamo-type Tetradentate Chelating Ligand and Its Pentacoordinated Copper(II) Complex (2013)
    Wiley-Blackwell
    Details
    Publication Date: 2013-08-16
    Description: A Salamo-type ligand 6,6′-diethoxy-2,2′-[1,1′-(ethylenedioxydinitrilo)dimethylidyne]diphenol (H 2 L) and its pentacoordinate copper(II) complex [CuL(H 2 O)] were synthesized and structurally characterized. The molecule of H 2 L is located in a crystallographic inversion center and adopts E configuration with respect to the C=N bond. In the complex [CuL(H 2 O)], the Cu II atom has a tetragonally elongated square-pyramidal configuration with donor atoms N 2 O 2 forming a perfect basal plane. And an infinite 2D layer supramolecular structure is formed through intermolecular C1–H1A ··· O5 and C2–H2A ··· O3 hydrogen bonding interactions.
    Print ISSN: 0044-2313
    Electronic ISSN: 1521-3749
    Topics: Chemistry and Pharmacology
    Published by Wiley-Blackwell
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  • 5
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    Exploration of microRNAs in porcine milk exosomes (2014)
    BioMed Central
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    Publication Date: 2014-02-06
    Description: Background: Breast milk contains complex nutrients and facilitates the maturation of various biological systems in infants. Exosomes, membranous vesicles of endocytic origin found in different body fluids such as milk, can mediate intercellular communication. We hypothesized that microRNAs (miRNAs), a class of non-coding small RNAs of 18-25 nt which are known to be packaged in exosomes of human, bovine and porcine milk, may play important roles in the development of piglets. Results: In this study, exosomes of approximately 100 nm in diameter were isolated from porcine milk through serial centrifugation and ultracentrifugation procedures. Total RNA was extracted from exosomes, and 5S ribosomal RNA was found to be the major RNA component. Solexa sequencing showed a total of 491 miRNAs, including 176 known miRNAs and 315 novel mature miRNAs (representing 366 pre-miRNAs), which were distributed among 30 clusters and 35 families, and two predicted novel miRNAs were verified targeting 3'UTR of IGF-1R by luciferase assay. Interestingly, we observed that three miRNAs (ssc-let-7e, ssc-miR-27a, and ssc-miR-30a) could be generated from miRNA-offset RNAs (moRNAs). The top 10 miRNAs accounted for 74.5% (67,154 counts) of total counts, which were predicted to target 2,333 genes by RNAhybrid software. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses using DAVID bioinformatics resources indicated that the identified miRNAs targeted genes enriched in transcription, immunity and metabolism processes, and 14 of the top 20 miRNAs possibly participate in regulation of the IgA immune network. Conclusions: Our findings suggest that porcine milk exosomes contain a large number of miRNAs, which potentially play an important role in information transfer from sow milk to piglets. The predicted miRNAs of porcine milk exosomes in this study provide a basis for future biochemical and biophysical function studies.
    Electronic ISSN: 1471-2164
    Topics: Biology
    Published by BioMed Central
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  • 6
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    The role of IFITM3 in the growth and migration of human glioma cells (2013)
    BioMed Central
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    Publication Date: 2013-12-28
    Description: Background: Interferon induced transmembrane protein 3 (IFITM3) is transcribed in most tissues and highly interferon-inducible. However, the role of IFITM3 in cancer is still poorly understood. Methods: Expression levels ofIFITM3were analyzed in 60 glioma patients by immunohistochemistry (IHC). Following closely, we investigated the phenotype of IFITM3 knockdown on glioma cell growth and tumorigenesis in vitro using lentivirus-mediated loss-of-function strategy. Results: Depletion of IFITM3in U251 cells dramatically inhibited cell proliferation and colony formation, which demonstrated that reduced IFITM3 protein levels could cause inhibition of tumorigenesis. Knockdown of IFITM3 also induced cell cycle arrest in G0/G1 phase, especially in the sub-G1 phase representing apoptotic cells. In addition, the migration of U251 cells was visibly weakened after IFITM3 knockdown, as determined by Transwell assay. Conclusions: Our findings provide new evidence that IFITM3 plays an important role in glioma cell growth and migration, suggesting that silencing of IFITM3 by RNA interference (RNAi) may be a potential approach to suppress glioma growth.
    Electronic ISSN: 1471-2377
    Topics: Medicine
    Published by BioMed Central
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  • 7
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    Genome-wide identification and transcriptional profiling analysis of auxin response-related gene families in cucumber (2014)
    BioMed Central
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    Publication Date: 2014-04-09
    Description: Background: Auxin signaling has a vital function in the regulation of plant growth and development, both which are known to be mediated by auxin-responsive genes. So far, significant progress has been made toward the identification and characterization of auxin-response genes in several model plants, while no systematic analysis for these families was reported in cucumber (Cucumis sativus L.), a reference species for Cucurbitaceae crops. The comprehensive analyses will help design experiments for functional validation of their precise roles in plant development and stress responses. Results: A genome-wide search for auxin-response gene homologues identified 16 auxin-response factors (ARFs), 27 auxin/indole acetic acids (Aux/IAAs), 10 Gretchen Hagen 3 (GH3s), 61 small auxin-up mRNAs (SAURs), and 39 lateral organ boundaries (LBDs) in cucumber. Sequence analysis together with the organization of putative motifs indicated the potential diverse functions of these five auxin-related family members. The distribution and density of auxin response-related genes on chromosomes were not uniform. Evolutionary analysis showed that the chromosomal segment duplications mainly contributed to the expansion of the CsARF, CsIAA, CsGH3, and CsLBD gene families. Quantitative real-time RT-PCR analysis demonstrated that many ARFs, AUX/IAAs, GH3s, SAURs, and LBD genes were expressed in diverse patterns within different organs/tissues and during different development stages. They were also implicated in IAA, methyl jasmonic acid, or salicylic acid response, which is consistent with the finding that a great number of diverse cis-elements are present in their promoter regions involving a variety of signaling transduction pathways. Conclusion: Genome-wide comparative analysis of auxin response-related family genes and their expression analysis provide new evidence for the potential role of auxin in development and hormone response of plants. Our data imply that the auxin response genes may be involved in various vegetative and reproductive developmental processes. Furthermore, they will be involved in different signal pathways and may mediate the crosstalk between various hormone responses.
    Electronic ISSN: 1756-0500
    Topics: Biology , Medicine
    Published by BioMed Central
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  • 8
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    Upregulation of Klotho Potentially Inhibits Pulmonary Vascular Remodeling by Blocking the Activation of the Wnt Signaling Pathway in Rats with PM2.5-Induced Pulmonary Arterial Hypertension (2018)
    Wiley-Blackwell
    Details
    Publication Date: 2018-01-31
    Description: ABSTRACT We evaluated the effects of Klotho on pulmonary vascular remodeling and cell proliferation and apoptosis in rat models with PM2.5-induced pulmonary arterial hypertension (PAH) via the Wnt signaling pathway. After establishing rat models of PM2.5-induced PAH, these Sprague-Dawley male rats were randomized into control and model groups. Cells extracted from the model rats were sub-categorized into different groups. Activation of Wnt/β-catenin signaling transcription factor was detected by a TOPFlash/FOPFlash assay. A serial of experiment was conducted to identify the mechanism of Klotho on PHA via the Wnt signaling pathway. VEGF levels and PaCO 2 content were higher in the model group, while PaO 2, NO 2 - /NO 3 - content and Klotho level was lower compared to the control group. In comparison to the control group, the model group had decreased Klotho and Bax levels, and elevated Wnt-1, β-catenin, bcl-2, survivin and PCNA expression, VEGF, IL-6, TNF-α, TNF-β1 and bFGF levels, as well as the percentage of pulmonary artery ring contraction. The Klotho vector, DKK-1 and DKK-1 + Klotho vector groups exhibited reduced cell proliferation, luciferase activity, and the expression of Wnt-1, β-catenin, bcl-2, survivin and PCNA, as well as shortened S phase compared with the blank and NC groups. Compared with the Klotho vector and DKK-1 groups, the DKK-1 + Klotho vector groups had reduced cell proliferation, luciferase activity, and the expression of Wnt-1, β-catenin, bcl-2, survivin and PCNA, as well as a shortened S phase. Conclusively, Klotho inhibits pulmonary vascular remodeling by inactivation of Wnt signaling pathway. This article is protected by copyright. All rights reserved
    Electronic ISSN: 0091-7419
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Published by Wiley-Blackwell
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  • 9
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    18F-FDG-PET evaluation of treatment response to neo-adjuvant therapy in patients with locally advanced rectal cancer: A meta-analysis (2012)
    Wiley-Blackwell
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    Publication Date: 2012-04-16
    Description: The purpose of this meta-analysis was to evaluate the utility of positron emission tomography (PET) using fluor-18-deoxyglucose (FDG) to predict the response of rectal cancer to neo-adjuvant therapy. All previously published studies on the role of FDG-PET in predicting the response of rectal cancer to neo-adjuvant therapy were collected. Pooled sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were calculated using statistical software. A total of 28 studies, comprising 1204 patients with rectal cancer, were included in the meta-analysis. Pooled sensitivity, specificity, PPV and NPV for FDG-PET predicting the response to therapy was 78% (95%CI, 75%-82%), 66% (95%CI, 62%-69%), 70% (95%CI, 66%-73%) and 75% (95%CI, 71%-0.79%), respectively. The included studies were of a relatively high methodological quality according to the QUADAS (Quality Assessment of Studies of Diagnostic Accuracy Included in Systematic Reviews) criteria. Based on the subgroup analyses, there was no significant difference between the response index (RI), the standardised uptake value (SUV) and the visual response score (VRS) in predicting the therapy response. However, the accuracy of the group that underwent PET scanning during therapy showed significantly higher values (sensitivity 86% and specificity 80%) than the group that was scanned after completion of the therapy. Therefore, FDG- PET is valuable for predicting the response of rectal carcinoma to neo-adjuvant therapy, and early evaluation of response during the therapy may be more promising. However, additional studies using prospective clinical trials will be required to assess the clinical benefit of this strategy. © 2012 Wiley-Liss, Inc.
    Print ISSN: 0020-7136
    Electronic ISSN: 1097-0215
    Topics: Biology , Medicine
    Published by Wiley-Blackwell
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  • 10
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    TRAF6 participates in early brain injury after subarachnoid hemorrhage in rats through inhibiting autophagy and promoting oxidative stress (2017)
    Wiley-Blackwell
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    Publication Date: 2017-05-26
    Description: Tumor necrosis factor receptor-associated factor 6 (TRAF6) is a member of the TRAF family and an important multifunctional intracellular adaptin of the tumor necrosis factor (TNF) superfamily and toll/IL-1 receptor (TIR) superfamily. TRAF6 has been studied in several central nervous system (CNS) diseases, including ischemic stroke, traumatic brain injury and neurodegenerative diseases, but its role in subarachnoid hemorrhage (SAH) has not been fully illustrated. This study was designed to explore changes of expression level and potential roles and mechanisms of TRAF6 in early brain injury (EBI) after SAH by using a Sprague–Dawley rat model of SAH induced in 0.3 ml non-heparinized autologous arterial blood injected into the prechiasmatic cistern. First, compared with the sham group, we found that the expression levels of TRAF6 increased gradually and peaked at 24 h after SAH. Second, the results showed that application of TRAF6 overexpression plasmid and genetic silencing siRNA could increase or decrease expression of TRAF6, respectively, and severely exacerbate or relieve EBI after SAH, including neuronal death, brain edema, and blood brain barrier (BBB) injury. Meanwhile, the levels of autophagy and oxidative stress were reduced and increased separately. Finally, GFP-TRAF6-C70A, which is a TRAF6 mutant that lacks E3 ubiquitin ligase activity, was used to explore the mechanism of TRAF6 in SAH, and the results showed that EBI and oxidative stress were reduced, but the levels of autophagy were increased under this condition. Collectively, these results indicated that TRAF6 affected the degree of EBI after SAH by inhibiting autophagy and promoting oxidative stress. This article is protected by copyright. All rights reserved.
    Print ISSN: 0022-3042
    Electronic ISSN: 1471-4159
    Topics: Medicine
    Published by Wiley-Blackwell on behalf of The International Society for Neurochemistry.
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