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https://www.readbyqxmd.com/read/28938018/genome-wide-identification-of-bacterial-plant-colonization-genes
#1
Benjamin J Cole, Meghan E Feltcher, Robert J Waters, Kelly M Wetmore, Tatiana S Mucyn, Elizabeth M Ryan, Gaoyan Wang, Sabah Ul-Hasan, Meredith McDonald, Yasuo Yoshikuni, Rex R Malmstrom, Adam M Deutschbauer, Jeffery L Dangl, Axel Visel
Diverse soil-resident bacteria can contribute to plant growth and health, but the molecular mechanisms enabling them to effectively colonize their plant hosts remain poorly understood. We used randomly barcoded transposon mutagenesis sequencing (RB-TnSeq) in Pseudomonas simiae, a model root-colonizing bacterium, to establish a genome-wide map of bacterial genes required for colonization of the Arabidopsis thaliana root system. We identified 115 genes (2% of all P. simiae genes) with functions that are required for maximal competitive colonization of the root system...
September 22, 2017: PLoS Biology
https://www.readbyqxmd.com/read/28937911/characterization-and-application-of-the-enzyme-peroxidase-to-the-degradation-of-the-mycotoxin-don
#2
Ana Carla P Feltrin, Sabrina De O Garcia, Sergiane S Caldas, Ednei G Primel, Eliana Badiale-Furlong, Jaqueline Garda-Buffon
Deoxynivalenol (DON), one of the main mycotoxins found in food matrices, has high level of toxicity. This study aimed to characterize the peroxidase enzyme extracted from rice bran to be applied to the biodegradation of DON in order to evaluate the potential peroxidase (PO) from rice bran (RB) has to degrade DON in optimal conditions. Purification and recovery factors of PO extracted from RB and purified by three-phase partitioning were 5.7% and 50%, respectively. PO had the highest level of activity in the phosphate buffer 5 mM pH 5...
September 22, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28930397/gegen%C3%A3-ber-echten-%C3%A3-rzten-sehen-diagnoseprogramme-alt-aus
#3
Rb
No abstract text is available yet for this article.
October 2016: MMW Fortschritte der Medizin
https://www.readbyqxmd.com/read/28929658/-study-on-uplc-fingerprint-of-red-ginseng-based-on-good-separation-and-good-purity-of-chromatographic-peaks
#4
Wei-Hong Feng, Chun Li, Li-Na Ji, Li-Xin Yang, Li-Xin Rong, Liang-Mian Chen, Hong Yi, Zhi-Min Wang
This study is to establish the UPLC fingerprint of red ginseng. The separation was performed on a Waters Acquity BEH C₁₈ column (2.1 mm × 50 mm,1.7 μm), with the mobile phase consisting of acetonitrile and water for gradient elution. The detection wavelength was set at 203 nm. The UPLC fingerprint of red ginseng was established by using sample chromatography of 22 different purchase areas and 26 common peaks were found. Compared with the reference substances, 11 of the common peaks were identified as ginsenosides Rg₁, ginsenoside Re, ginsenoside Rf, ginsenoside Rh₁, ginsenoside Rg₂, ginsenoside Rb₁, 20(S)-ginsenoside F₁, ginsenoside Rb₂, ginsenoside Rb3, 20(S)-ginsenoside Rg₃ and 20(R)-ginsenoside Rg₃, respectively...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28928282/dnmt1-dependent-chk1-pathway-suppression-is-protective-against-neuron-division
#5
Mio Oshikawa, Kei Okada, Hidenori Tabata, Koh-Ichi Nagata, Itsuki Ajioka
Neuronal differentiation and cell-cycle exit are tightly coordinated, even in pathological situations. When pathological neurons re-enter the cell cycle and progress through the S phase, they undergo cell death instead of division. However, the mechanisms underlying mitotic resistance are mostly unknown. Here, we have found that acute inactivation of retinoblastoma (Rb) family proteins (Rb, p107 and p130) in mouse postmitotic neurons leads to cell death after S-phase progression. Checkpoint kinase 1 (Chk1) pathway activation during the S phase prevented the cell death, and allowed the division of cortical neurons that had undergone acute Rb family inactivation, oxygen-glucose deprivation (OGD) or in vivo hypoxia-ischemia...
September 15, 2017: Development
https://www.readbyqxmd.com/read/28927616/functionalization-of-cotton-fabrics-with-plasmonic-photo-active-nanostructured-au-tio2-layer
#6
M Abid, S Bouattour, A M Ferraria, D S Conceição, A P Carapeto, L F Vieira Ferreira, A M Botelho do Rego, M Rei Vilar, S Boufi
A simple approach to functionalize cotton fabrics with Au and TiO2 nanostructured layer is presented. Hybrid fabrics (Cot-Au-TiO2) are prepared through reduction of AuCl4(-) on cotton, followed by a non-aqueous sol-gel procedure using tetrabutyltitanate and a hydrothermal treatment at 110°C. The generation of crystalline TiO2 is confirmed by Raman spectroscopy. The fibres morphology and their roughness are characterized by AFM and FE-SEM. XPS shows how the concentration of the NPs precursors (Au and TiO2) affects the layer composition...
November 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28927086/quercetin-inhibits-angiogenesis-mediated-human-retinoblastoma-growth-by-targeting-vascular-endothelial-growth-factor-receptor
#7
Wei Song, Xiaofei Zhao, Jiarui Xu, Han Zhang
Retinoblastoma (RB) is the most common malignant intraocular cancer in teenagers, occurrence of which depends on the mutation of multiple genes. Among all the signaling pathways involved in the oncogenesis of RB, the process of angiogenesis has been demonstrated to be associated with the local invasive growth and metastasis of this cancer type. Quercetin (Que) is a typical flavonoid and has been reported to inhibit angiogenesis in various types of tumors. In the present study, the effect of Que on RB cells and angiogenesis of RB was evaluated...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927044/isolation-and-characterization-of-adult-mammary-stem-cells-from-breast-cancer-adjacent-tissues
#8
Ai-Ping Shi, Zhi-Min Fan, Ke-Wei Ma, Yan-Fang Jiang, Lei Wang, Ke-Wei Zhang, Shi-Bo Fu, Ning Xu, Zhi-Ru Zhang
Normal adult mammary stem cells (AMSCs) are promising sources for breast reconstruction, particularly following the resection of breast tumors. However, carcinogenic events can potentially convert normal AMSCs to cancer stem cells, posing a safety concern for the use of AMSCs for clinical tissue regeneration. In the present study, AMSCs and autologous primary breast cancer cells were isolated and compared for their ability to differentiate, their gene expression profile, and their potential to form tumors in vivo...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28926231/resonance-emission-enhancement-ree-for-narrow-band-red-emitting-a2gef6-mn-4-a-na-k-rb-cs-phosphors-synthesized-via-a-precipitation-cation-exchange-route
#9
Hongzhou Lian, Qingming Huang, Yeqing Chen, Kai Li, Sisi Liang, Mengmeng Shang, Manman Liu, Jun Lin
Narrow band red-emitting A2GeF6:Mn(4+) (A = Na, K, Rb, Cs) phosphors were prepared through a two-step precipitation-cation exchange route using a K2MnF6 precursor as the Mn(4+) source. The phase purity, morphology, and constituent were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectric spectroscopy (XPS), and electron paramagnetic resonance (EPR) examination. Optical properties were investigated by photoluminescence spectra (PL and PLE) and high-resolution PL. A temperature-dependent PL examination was performed to investigate the electron-phonon coupling emission mechanism of Mn(4+) in these alkali fluorogermanates...
September 19, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28923602/cell-wall-mannoprotein-of-candida-albicans-induces-cell-cycle-alternation-and-inhibits-apoptosis-of-hacat-cells-via-nf-%C3%AE%C2%BAb-signal-pathway
#10
Yang Han, Hang-Hang Jiang, Yu-Jing Zhang, Xing-Jia Hao, Yu-Zhe Sun, Rui-Qun Qi, Hong-Duo Chen, Xing-Hua Gao
Candida albicans (C. albicans) is a commensal organism in human and a well-known dimorphic opportunistic pathogenic fungus. Though plenty of researches on the pathogenesis of C. albicans have been performed, the mechanism is not fully understood. The cell wall components of C. albicans have been documented to play important roles in its pathogenic processes. To further study the infectious mechanism of C. albicans, we investigated the potential functional role of its cell wall mannoprotein in cell cycle and apoptosis of HaCaT cells...
September 15, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28923149/you-re-the-flight-surgeon
#11
(no author information available yet)
Woolley RB. You're the flight surgeon: hypertension. Aerosp Med Hum Perform. 2017; 88(10):967-970.
October 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28920576/the-dream-complex-through-its-subunit-lin37-cooperates-with-rb-to-initiate-quiescence
#12
Christina Fs Mages, Axel Wintsche, Stephan H Bernhart, Gerd A Müller
The retinoblastoma Rb protein is an important factor controlling the cell cycle. Yet, mammalian cells carrying Rb deletions are still able to arrest under growth-limiting conditions. The Rb-related proteins p107 and p130, which are components of the DREAM complex, had been suggested to be responsible for a continued ability to arrest by inhibiting E2f activity and by recruiting chromatin-modifying enzymes. Here, we show that p130 and p107 are not sufficient for DREAM-dependent repression. We identify the MuvB protein Lin37 as an essential factor for DREAM function...
September 18, 2017: ELife
https://www.readbyqxmd.com/read/28919969/karyotypic-differentiation-of-populations-of-the-common-shrew-sorex-araneus-l-mammalia-in-belarus
#13
Yury M Borisov, Iryna A Kryshchuk, Helen S Gaiduchenko, Elena V Cherepanova, Svetlana V Zadyra, Elena S Levenkova, Dmitriy V Lukashov, Victor N Orlov
The common shrews, Sorex araneus Linnaeus, 1758, inhabiting the territory of Belarus, are characterized by a significant variation in the frequency of Robertsonian (Rb) translocations. The frequency clines for translocations specific of three chromosome races: the West Dvina (gm, hk, ip, no, qr), Kiev (g/m, hi, k/o, n, p, q, r), and Białowieża (g/r, hn, ik, m/p, o, q) have already been studied in this territory. In this communication we report new data on polymorphic populations with Rb metacentrics specific of the Neroosa race (go, hi, kr, mn, p/q) in south-eastern Belarus, analyse the distribution of karyotypes in southern and central Belarus and draw particular attention to the fixation of the acrocentric variants of chromosomes in this area...
2017: Comparative Cytogenetics
https://www.readbyqxmd.com/read/28919133/transfer-parameters-for-icrp-s-reference-animals-and-plants-in-a-terrestrial-mediterranean-ecosystem
#14
J Guillén, N A Beresford, A Baeza, M Izquierdo, M D Wood, A Salas, A Muñoz-Serrano, J M Corrales-Vázquez, J G Muñoz-Muñoz
A system for the radiological protection of the environment (or wildlife) based on Reference Animals and Plants (RAPs) has been suggested by the International Commission on Radiological Protection (ICRP). To assess whole-body activity concentrations for RAPs and the resultant internal dose rates, transfer parameters are required. However, transfer values specifically for the taxonomic families defined for the RAPs are often sparse and furthermore can be extremely site dependent. There is also a considerable geographical bias within available transfer data, with few data for Mediterranean ecosystems...
September 14, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28915637/btk-suppresses-myeloma-cellular-senescence-through-activating-akt-p27-rb-signaling
#15
Chunyan Gu, Hailin Peng, Yue Lu, Hongbao Yang, Zhidan Tian, Gang Yin, Wen Zhang, Sicheng Lu, Yi Zhang, Ye Yang
We previously explored the role of BTK in maintaining multiple myeloma stem cells (MMSCs) self-renewal and drug-resistance. Here we investigated the elevation of BTK suppressing MM cellular senescence, a state of irreversible cellular growth arrest. We firstly discovered that an increased expression of BTK in MM samples compared to normal controls by immunohistochemistry (IHC), and significant chromosomal gain in primary samples. In addition, BTK high-expressing MM patients are associated with poor outcome in both Total Therapy 2 (TT2) and TT3 cohorts...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915588/foxr2-promotes-glioma-proliferation-by-suppression-of-the-p27-pathway
#16
Xuejiao Liu, Ning Liu, Chenglong Yue, Dacheng Wang, Zhenglei Qi, Yiming Tu, Guokun Zhuang, Di Zhou, Shangfeng Gao, Mingshan Niu, Rutong Yu
FoxR2 plays an important role in the development of many human tumors. However, the effects of FoxR2 on tumorigenicity of human glioma remain unclear. In this study, we investigated the roles of FoxR2 in cell proliferation and invasion of glioma. We found that overexpression of FoxR2 promoted the proliferation, migration and invasion of glioma cells. Knockout of FoxR2 induced G1 arrest by decreasing the expression levels of cyclin D1, cyclin E and p-Rb. Mechanistically, upregulation of FoxR2 increased the level and activity of MMP-2 and decreased the expression of p27...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915557/loss-of-p16-ink4a-stimulates-aberrant-mitochondrial-biogenesis-through-a-cdk4-rb-independent-pathway
#17
Ethika Tyagi, Bin Liu, Chelsea Li, Tong Liu, Jared Rutter, Douglas Grossman
The tumor suppressor p16INK4A (p16) inhibits cell cycle progression through the CDK4/Rb pathway. We have previously shown that p16 regulates cellular oxidative stress, independent of its role in cell cycle control. We investigated whether loss of p16 had a direct impact on the mitochondria. We found that p16-null primary mouse fibroblasts (PMFs) displayed increased mitochondrial mass and expression of mitochondrial respiratory subunit proteins compared to wild-type (WT) PMFs. These findings in p16-null PMFs were associated with increased expression of the mitochondrial biogenesis transcription factors PRC and TFAM...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915482/nickel-nanoparticles-encapsulated-in-porous-carbon-and-carbon-nanotube-hybrids-from-bimetallic-metal-organic-frameworks-for-highly-efficient-adsorption-of-dyes
#18
Lina Jin, Xiaoshuang Zhao, Xinye Qian, Mingdong Dong
Nickel nanoparticles encapsulated in porous carbon/carbon nanotube hybrids (Ni/PC-CNT) were successfully prepared by a facile carbonization process using Ni/Zn-MOF as the precursor. Distinct from previous studies, Ni/Zn-MOF precursors were prepared via a direct precipitation method at room temperature for only 5min. After the carbonization, magnetic Ni nanoparticles were well embedded in the porous carbon and carbon nanotube. The obtained Ni/PC-CNT composites had a high surface area (999m(2) g(-1)), large pore volume (0...
September 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28915459/relationships-of-co2-assimilation-rates-with-exposure-and-flux-based-o3-metrics-in-three-urban-tree-species
#19
Yansen Xu, Bo Shang, Xiangyang Yuan, Zhaozhong Feng, Vicent Calatayud
The relationships of CO2 assimilation under saturated-light conditions (Asat) with exposure- (AOTX, Accumulated Ozone exposure over a hourly Threshold of X ppb) and flux-based (PODY, Phytotoxic Ozone Dose over a hourly threshold Y nmol·m(-2)·s(-1)) O3 metrics was studied on three common urban trees, Fraxinus chinensis (FC), Platanus orientalis (PO) and Robinia pseudoacacia (RP). Parameterizations for a stomatal multiplicative model were proposed for the three species. RP was the species showing lower species-specific maximum stomatal conductance (gmax) and experiencing lower cumulative O3 uptake along the experiment, but in contrast it was the most sensitive to O3...
September 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28912944/photodynamic-therapy-with-bengal-rose-and-derivatives-against-leishmania-amazonensis
#20
Taisa Rocha Navasconi, Vanessa Nesi Dos Reis, Camila Fabiano Freitas, Paulo Cesar de Souza Pereira, Wilker Caetano, Noboru Hioka, Maria Valdrinez Campana Lonardoni, Sandra Mara Alessi Aristides, Thaís Gomes Verzignassi Silveira
Introduction: The treatment of cutaneous leishmaniasis (CL) is based primarily on the use of pentavalent antimonials, which may lead to many side effects limiting their use. Photodynamic therapy (PDT) is an alternative for the treatment of CL, and some xanthene dyes have the potential for use in PDT. Methods: The xanthenes rose bengal B (RB) and its derivatives rose bengal methyl ester (RBMET), and butyl ester (RBBUT) were analyzed for leishmanicidal activity against promastigotes and intracellular amastigotes of Leishmania amazonensis...
2017: Journal of Lasers in Medical Sciences
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