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https://www.readbyqxmd.com/read/28817840/nuciferine-relaxes-tracheal-rings-via-the-blockade-of-vdlcc-and-nscc-channels
#1
Xiao Yang, Meng-Fei Yu, Jun Lei, Yong-Bo Peng, Ping Zhao, Lu Xue, Weiwei Chen, Li-Qun Ma, Qing-Hua Liu, Jinhua Shen
This study aimed to elucidate the mechanisms of nuciferine (a main aporphine alkaloid of lotus leaf extract), which can induce relaxation in contracted tracheal rings. Under Ca(2+)-free and 2 mM Ca(2+) conditions, we found that nuciferine had no effect on the resting muscle tone of tracheal rings. In contrast, nuciferine relaxed high K(+)-contracted mouse tracheal rings in a dose-dependent manner and inhibited both Ca(2+) influx and voltage-dependent L-type Ca(2+) channel currents induced by high K(+). Similarly, nuciferine also inhibited acetylcholine-induced contractions in mouse tracheal rings in a dose-dependent manner...
August 17, 2017: Planta Medica
https://www.readbyqxmd.com/read/28817839/evaluating-the-effect-of-immune-cells-on-the-outcome-of-patients-with-mesothelioma
#2
Serena J Chee, Maria Lopez, Toby Mellows, Sharmali Gankande, Karwan A Moutasim, Scott Harris, James Clarke, Pandurangan Vijayanand, Gareth J Thomas, Christian H Ottensmeier
BACKGROUND: We systematically assessed the prognostic and predictive value of infiltrating adaptive and innate immune cells in a large cohort of patients with advanced mesothelioma. METHODS: A tissue microarray from 302 samples was constructed. Markers of adaptive immune response in T-cells (CD8(+), FOXP3(+), CD4(+), CD45RO(+), CD3(+)) and B-cells (CD20(+)), and of innate immune response; neutrophils (NP57(+)), natural killer cells (CD56(+)) and macrophages (CD68(+)) were evaluated...
August 17, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28817838/pharmacogenetic-determinants-of-outcomes-on-triplet-hepatic-artery-infusion-and-intravenous-cetuximab-for-liver-metastases-from-colorectal-cancer-european-trial-optiliv-nct00852228
#3
Francis Lévi, Abdoulaye Karaboué, Raphaël Saffroy, Christophe Desterke, Valerie Boige, Denis Smith, Mohamed Hebbar, Pasquale Innominato, Julien Taieb, Carlos Carvalho, Rosine Guimbaud, Christian Focan, Mohamed Bouchahda, René Adam, Michel Ducreux, Gérard Milano, Antoinette Lemoine
BACKGROUND: The hepatic artery infusion (HAI) of irinotecan, oxaliplatin and 5-fluorouracil with intravenous cetuximab achieved outstanding efficacy in previously treated patients with initially unresectable liver metastases from colorectal cancer. This planned study aimed at the identification of pharmacogenetic predictors of outcomes. METHODS: Circulating mononuclear cells were analysed for 207 single-nucleotide polymorphisms (SNPs) from 34 pharmacology genes...
August 17, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28817834/mdm2-promotes-epithelial-mesenchymal-transition-and-metastasis-of-ovarian-cancer-skov3-cells
#4
Ying Chen, Dan-Dan Wang, Ye-Ping Wu, Dan Su, Tian-Yi Zhou, Ren-Hua Gai, Ying-Ying Fu, Lin Zheng, Qiao-Jun He, Hong Zhu, Bo Yang
BACKGROUND: Metastasis accounts for the most lethal reason for the death of ovarian cancer patients, but remains largely untreated. Epithelial-mesenchymal transition (EMT) is critical for the conversion of early-stage ovarian tumours into metastatic malignancies. Thus the exploration of the signalling pathways promoting EMT would open potential opportunities for the treatment of metastatic ovarian cancer. Herein, the putative role of MDM2 in regulating EMT and metastasis of ovarian cancer SKOV3 cells was investigated...
August 17, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28817833/fmnl2-destabilises-commd10-to-activate-nf-%C3%AE%C2%BAb-pathway-in-invasion-and-metastasis-of-colorectal-cancer
#5
S S Yang, X M Li, M Yang, X L Ren, J L Hu, X H Zhu, F F Wang, Z C Zeng, J Y Li, Z Q Cheng, W T Liao, Y Q Ding, J Guan, L Liang
BACKGROUND: Diaphanous-related formins (DRFs), actin necleator, have been known to participate in the progression of cancer cells. We previously reported that FMNL2 (Formin-like2), a member of DRFs, was a positive regulator in colorectal cancer (CRC) metastasis, yet proteins and pathways required for the function of this pro-invasive DRFs remain to be identified. METHODS: The relationship between FMNL2 and COMMD10 was examined using Co-IP, GST pull-down, immunofluorescence and in vitro ubiquitination assay...
August 17, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28817830/microrna-200a-inhibits-transforming-growth-factor-%C3%AE-1-induced-proximal-tubular-epithelial-mesenchymal-transition-by-targeting-%C3%AE-catenin
#6
Yi Gong, Zhexue Qin, Baoshang Zhou, Hua Chen, Zhengmin Shi, Jing Zhang
BACKGROUND: The epithelial-mesenchymal transition (EMT) is a crucial event in the development of renal interstitial fibrosis (RIF). A growing body of evidence indicates that β-catenin plays an important role in various types of fibrosis. Although members of the microRNA (miRNA)-200 family have been suggested to suppress EMT in cancer and fibrosis, the function of miRNA-200a in regulating the progression of RIF is unknown. We speculate that miRNA-200a may hinder this progression through the suppression of β-catenin...
August 18, 2017: Nephron
https://www.readbyqxmd.com/read/28817824/parametric-linkage-analysis-identifies-five-novel-genome-wide-significant-loci-for-familial-lung-cancer
#7
Anthony M Musolf, Claire L Simpson, Mariza de Andrade, Diptasri Mandal, Colette Gaba, Ping Yang, Yafang Li, Ming You, Elena Y Kupert, Marshall W Anderson, Ann G Schwartz, Susan M Pinney, Christopher I Amos, Joan E Bailey-Wilson
OBJECTIVE: One of four American cancer patients dies of lung cancer. Environmental factors such as tobacco smoking are known to affect lung cancer risk. However, there is a genetic factor to lung cancer risk as well. Here, we perform parametric linkage analysis on family-based genotype data in an effort to find genetic loci linked to the disease. METHODS: 197 individuals from families with a high-risk history of lung cancer were recruited and genotyped using an Illumina array...
August 18, 2017: Human Heredity
https://www.readbyqxmd.com/read/28817816/exosomes-derived-from-human-bone-marrow-mesenchymal-stem-cells-promote-tumor-growth-through-hedgehog-signaling-pathway
#8
Jin Qi, Yali Zhou, Zuoyi Jiao, Xu Wang, Yang Zhao, Yangbin Li, Huijuan Chen, Luxi Yang, Hongwen Zhu, Yumin Li
BACKGROUND/AIMS: Mesenchymal stem/stromal cells (MSCs) are known to home to sites of tumor microenvironments where they participate in the formation of the tumor microenvironment and to interplay with tumor cells. However, the potential functional effects of MSCs on tumor cell growth are controversial. Here, we, from the view of bone marrow MSC-derived exosomes, study the molecular mechanism of MSCs on the growth of human osteosarcoma and human gastric cancer cells. METHODS: MSCs derived from human bone marrow (hBMSCs) were isolated and cultured in complete DMEM/F12 supplemented with 10% exosome-depleted fetal bovine serum and 1% penicillin-streptomycin, cell culture supernatants containing exosomes were harvested and exosome purification was performed by ultracentrifugation...
August 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28817810/tgf-%C3%AE-1-is-involved-in-vitamin-d-induced-chondrogenic-differentiation-of-bone-marrow-derived-mesenchymal-stem-cells-by-regulating-the-erk-jnk-pathway
#9
Xiaorui Jiang, Botao Huang, Huiying Yang, Guishi Li, Chunlei Zhang, Guangshi Yang, Feng Lin, Guodong Lin
BACKGROUND/AIMS: Osteoarthritis (OA) is characterized by degradation of cartilage, sole cell type of which is chondrocytes. Bone marrow-derived mesenchymal stem cells (BMSCs) possess multipotency and can be directionally differentiated into chondrocytes under stimulation. This study was aimed to explore the possible roles of vitamin D and transforming growth factor-β1 (TGF-β1) in the chondrogenic differentiation of BMSCs. METHODS: BMSCs were isolated from femurs and tibias of rats and characterized by flow cytometry...
August 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28817808/ppar%C3%AE-agonist-stimulated-angiogenesis-by-improving-endothelial-precursor-cell-function-via-a-nlrp3-inflammasome-pathway
#10
Yaping Deng, Xue Han, Zheng Yao, Yuannan Sun, Jiawen Yu, Jian Cai, Guofei Ren, Guojun Jiang, Feng Han
BACKGROUND: Impaired wound healing is a common complication of diabetes and is the leading cause of lower extremity amputation. Treatment with fenofibrate, a peroxisome proliferators-activated receptor α (PPARα) agonist, was associated with a lower risk of amputations, particularly minor amputations without known large-vessel diseases, probably through non-lipid mechanisms. The current study aimed to test our hypothesis that fenofibrate stimulates angiogenesis and restores endothelial precursor cell (EPC) function via inhibiting Nod-like receptor protein 3 (NLRP3) inflammasome in streptozotocin (STZ)-induced diabetic mice...
August 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28817805/ltp-at-hilar-mossy-cell-dentate-granule-cell-synapses-modulates-dentate-gyrus-output-by-increasing-excitation-inhibition-balance
#11
Yuki Hashimotodani, Kaoutsar Nasrallah, Kyle R Jensen, Andrés E Chávez, Daniel Carrera, Pablo E Castillo
Excitatory hilar mossy cells (MCs) in the dentate gyrus receive inputs from dentate granule cells (GCs) and project back to GCs locally, contralaterally, and along the longitudinal axis of the hippocampus, thereby establishing an associative positive-feedback loop and connecting functionally diverse hippocampal areas. MCs also synapse with GABAergic interneurons that mediate feed-forward inhibition onto GCs. Surprisingly, although these circuits have been implicated in both memory formation (e.g., pattern separation) and temporal lobe epilepsy, little is known about activity-dependent plasticity of their synaptic connections...
August 16, 2017: Neuron
https://www.readbyqxmd.com/read/28817802/molecular-memory-of-morphologies-by-septins-during-neuron-generation-allows-early-polarity-inheritance
#12
Leila Boubakar, Julien Falk, Hugo Ducuing, Karine Thoinet, Florie Reynaud, Edmund Derrington, Valérie Castellani
Transmission of polarity established early during cell lineage history is emerging as a key process guiding cell differentiation. Highly polarized neurons provide a fascinating model to study inheritance of polarity over cell generations and across morphological transitions. Neural crest cells (NCCs) migrate to the dorsal root ganglia to generate neurons directly or after cell divisions in situ. Using live imaging of vertebrate embryo slices, we found that bipolar NCC progenitors lose their polarity, retracting their processes to round for division, but generate neurons with bipolar morphology by emitting processes from the same locations as the progenitor...
August 16, 2017: Neuron
https://www.readbyqxmd.com/read/28817800/tia1-mutations-in-amyotrophic-lateral-sclerosis-and-frontotemporal-dementia-promote-phase-separation-and-alter-stress-granule-dynamics
#13
Ian R Mackenzie, Alexandra M Nicholson, Mohona Sarkar, James Messing, Maria D Purice, Cyril Pottier, Kavya Annu, Matt Baker, Ralph B Perkerson, Aishe Kurti, Billie J Matchett, Tanja Mittag, Jamshid Temirov, Ging-Yuek R Hsiung, Charles Krieger, Melissa E Murray, Masato Kato, John D Fryer, Leonard Petrucelli, Lorne Zinman, Sandra Weintraub, Marsel Mesulam, Julia Keith, Sasha A Zivkovic, Veronica Hirsch-Reinshagen, Raymond P Roos, Stephan Züchner, Neill R Graff-Radford, Ronald C Petersen, Richard J Caselli, Zbigniew K Wszolek, Elizabeth Finger, Carol Lippa, David Lacomis, Heather Stewart, Dennis W Dickson, Hong Joo Kim, Ekaterina Rogaeva, Eileen Bigio, Kevin B Boylan, J Paul Taylor, Rosa Rademakers
Amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) are age-related neurodegenerative disorders with shared genetic etiologies and overlapping clinical and pathological features. Here we studied a novel ALS/FTD family and identified the P362L mutation in the low-complexity domain (LCD) of T cell-restricted intracellular antigen-1 (TIA1). Subsequent genetic association analyses showed an increased burden of TIA1 LCD mutations in ALS patients compared to controls (p = 8.7 × 10(-6)). Postmortem neuropathology of five TIA1 mutations carriers showed a consistent pathological signature with numerous round, hyaline, TAR DNA-binding protein 43 (TDP-43)-positive inclusions...
August 16, 2017: Neuron
https://www.readbyqxmd.com/read/28817799/human-astrocyte-maturation-captured-in-3d-cerebral-cortical-spheroids-derived-from-pluripotent-stem-cells
#14
Steven A Sloan, Spyros Darmanis, Nina Huber, Themasap A Khan, Fikri Birey, Christine Caneda, Richard Reimer, Stephen R Quake, Ben A Barres, Sergiu P Paşca
There is significant need to develop physiologically relevant models for investigating human astrocytes in health and disease. Here, we present an approach for generating astrocyte lineage cells in a three-dimensional (3D) cytoarchitecture using human cerebral cortical spheroids (hCSs) derived from pluripotent stem cells. We acutely purified astrocyte-lineage cells from hCSs at varying stages up to 20 months in vitro using immunopanning and cell sorting and performed high-depth bulk and single-cell RNA sequencing to directly compare them to purified primary human brain cells...
August 16, 2017: Neuron
https://www.readbyqxmd.com/read/28817797/wrapped-to-adapt-experience-dependent-myelination
#15
REVIEW
Christopher W Mount, Michelle Monje
Activity of the nervous system has long been recognized as a critical modulator of brain structure and function. Influences of experience on the cytoarchitecture and functional connectivity of neurons have been appreciated since the classic work of Hubel and Wiesel (1963; Wiesel and Hubel, 1963a, 1963b). In recent years, a similar structural plasticity has come to light for the myelinated infrastructure of the nervous system. While an innate program of myelin development proceeds independently of nervous system activity, increasing evidence supports a role for activity-dependent, plastic changes in myelin-forming cells that influence myelin structure and neurological function...
August 16, 2017: Neuron
https://www.readbyqxmd.com/read/28817795/hippocampal-dentate-mossy-cells-improve-their-cv-and-trk-into-the-limelight
#16
Aaron D Milstein, Ivan Soltesz
The impact of dentate mossy cells on hippocampal activity remained uncertain despite a long history of investigation. In this issue of Neuron, Hashimotodani et al. (2017) discover a presynaptically expressed form of long-term potentiation at mossy cell outputs, shedding light on their mysterious function.
August 16, 2017: Neuron
https://www.readbyqxmd.com/read/28817787/evaluation-of-the-electron-transfer-flavoprotein-etf-as-an-antibacterial-target-in-burkholderia-cenocepacia
#17
Maria S Stietz, Christina Lopez, Osasumwen Osifo, Marcelo Tolmasky, Silvia T Cardona
There are hundreds of essential genes in multidrug resistant bacterial genomes, but only a few of their products are exploited as antibacterial targets. An example is the electron flavoprotein (ETF) which is required for growth and viability in <i>Burkholderia cenocepacia</i>. Here, we evaluated ETF as an antibiotic target for <i>Burkholderia cepacia</i> complex (Bcc). Depletion of the bacterial ETF during infection of <i>Caenorhabditis elegans</i> significantly extended survival of the nematodes, proving that ETF is essential for survival of <i>B...
August 17, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28817786/propofol-attenuates-bv2-microglia-inflammation-via-nmda-receptor-inhibition
#18
Qichao Wu, Yanjun Zhao, Xiangyuan Chen, Minmin Zhu, Changhong Miao
Activated microglia, involved in the occurrence and improvement of sepsis-associated encephalopathy, can induce the expression of pro-inflammatory cytokines and pro-inflammatory enzymes, resulting in inflammation-mediated neuronal cell death. It was reported that propofol could inhibit lipopolysaccharide (LPS)-induced pro-inflammatory cytokines and pro-inflammatory enzymes expression in BV2 and primary microglial cells. However, the underlying mechanism is not well known. In the present study, we investigated whether and how propofol inhibited LPS-induced the expression of pro-inflammatory cytokines and pro-inflammatory enzymes in BV2 cells...
August 17, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28817784/hydrogen-peroxide-regulates-angiogenesis-related-factors-in-tumor-cells
#19
Ana Jerónimo, Gonçalo Rodrigues, Filipe Vilas-Boas, Gabriel G Martins, Ana Bagulho, Carla Real
Tumor angiogenesis is required for tumor development and growth and is regulated by several factors including reactive oxygen species (ROS). Hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) is a ROS with an important role in cell signaling but how H<sub>2</sub>O<sub>2</sub> regulates tumor angiogenesis is still poorly understood. We have xenografted tumor cells with altered levels of H<sub>2</sub>O<sub>2</sub> by catalase overexpression into zebrafish embryos to study redox-induced tumor neovascularization...
August 17, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28817772/quantifying-elucidating-thermally-enhanced-minority-carrier-diffusion-length-using-radius-controlled-rutile-nanowires
#20
Liming Zhang, Litianqi Sun, Zixuan Guan, Sang Chul Lee, Yingzhou Li, Haitao Dean Deng, Yiyang Li, Nadia Ahlborg, Madhur Boloor, Nicholas A Melosh, William C Chueh
Minority carrier diffusion length (LD) is a crucial property that determines the performance of light absorbers in photoelectrochemical (PEC) cells. Many transition-metal oxides are stable photoanodes for solar water splitting but exhibit a small to moderate LD, ranging from a few nanometers (such as α-Fe2O3 and TiO2) to a few tens of nanometers (such as BiVO4). Under operating conditions, temperature of PEC cells can deviate substantially from ambient, yet the temperature-dependence of LD has not been quantified...
August 17, 2017: Nano Letters
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