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https://www.readbyqxmd.com/read/28079253/epithelial-mesenchymal-transition-emt-a-biological-process-in-the-development-stem-cell-differentiation-and-tumorigenesis
#1
REVIEW
Tong Chen, Yanan You, Hua Jiang, Zack Z Wang
The lineage transition between epithelium and mesenchyme is a process known as epithelial-mesenchymal transition (EMT), by which polarized epithelial cells lose their adhesion property and obtain mesenchymal cell phenotypes. EMT is a biological process that is often involved in embryogenesis and diseases, such as cancer invasion and metastasis. The EMT and the reverse process, mesenchymal-epithelial transition (MET), also play important roles in stem cell differentiation and de-differentiation (or reprogramming)...
January 12, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28075486/highly-expandable-human-ips-cell-derived-neural-progenitor-cells-npc-and-neurons-for-central-nervous-system-disease-modeling-and-high-throughput-screening
#2
Chialin Cheng, Daniel M Fass, Kat Folz-Donahue, Marcy E MacDonald, Stephen J Haggarty
Reprogramming of human somatic cells into induced pluripotent stem (iPS) cells has greatly expanded the set of research tools available to investigate the molecular and cellular mechanisms underlying central nervous system (CNS) disorders. Realizing the promise of iPS cell technology for the identification of novel therapeutic targets and for high-throughput drug screening requires implementation of methods for the large-scale production of defined CNS cell types. Here we describe a protocol for generating stable, highly expandable, iPS cell-derived CNS neural progenitor cells (NPC) using multi-dimensional fluorescence activated cell sorting (FACS) to purify NPC defined by cell surface markers...
January 11, 2017: Current Protocols in Human Genetics
https://www.readbyqxmd.com/read/28068482/metabolic-reprogramming-in-brain-tumors
#3
Sriram Venneti, Craig B Thompson
Next-generation sequencing has substantially enhanced our understanding of the genetics of primary brain tumors by uncovering several novel driver genetic alterations. How many of these genetic modifications contribute to the pathogenesis of brain tumors is not well understood. An exciting paradigm emerging in cancer biology is that oncogenes actively reprogram cellular metabolism to enable tumors to survive and proliferate. We discuss how some of these genetic alterations in brain tumors rewire metabolism...
December 21, 2016: Annual Review of Pathology
https://www.readbyqxmd.com/read/28060321/imaging-of-cell-shape-alteration-and-cell-movement-in-drosophila-gastrulation-using-de-cadherin-reporter-transgenic-flies
#4
M Rezaul Karim, Tomohiro Haruta, Taro Matsumoto, Hiroki Oda, Hiroaki Taniguchi
Gastrulation is the first set of morphologically dynamic events that occur during the embryonic development of multicellular animals such as Drosophila. This morphological alteration is also recognized as epithelial to mesenchymal transition (EMT). Dysregulation of EMT is associated with fibrosis and cancer metastasis. There is emerging evidence that EMT is controlled by a number of molecular mechanisms. As such, many key genes that control apical constriction are also known to be important factors in the EMT observed in cancer metastasis...
December 29, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28059768/sox2-promotes-lineage-plasticity-and-antiandrogen-resistance-in-tp53-and-rb1-deficient-prostate-cancer
#5
Ping Mu, Zeda Zhang, Matteo Benelli, Wouter R Karthaus, Elizabeth Hoover, Chi-Chao Chen, John Wongvipat, Sheng-Yu Ku, Dong Gao, Zhen Cao, Neel Shah, Elizabeth J Adams, Wassim Abida, Philip A Watson, Davide Prandi, Chun-Hao Huang, Elisa de Stanchina, Scott W Lowe, Leigh Ellis, Himisha Beltran, Mark A Rubin, David W Goodrich, Francesca Demichelis, Charles L Sawyers
Some cancers evade targeted therapies through a mechanism known as lineage plasticity, whereby tumor cells acquire phenotypic characteristics of a cell lineage whose survival no longer depends on the drug target. We use in vitro and in vivo human prostate cancer models to show that these tumors can develop resistance to the antiandrogen drug enzalutamide by a phenotypic shift from androgen receptor (AR)-dependent luminal epithelial cells to AR-independent basal-like cells. This lineage plasticity is enabled by the loss of TP53 and RB1 function, is mediated by increased expression of the reprogramming transcription factor SOX2, and can be reversed by restoring TP53 and RB1 function or by inhibiting SOX2 expression...
January 6, 2017: Science
https://www.readbyqxmd.com/read/28057861/cellular-context-dependent-consequences-of-apc-mutations-on-gene-regulation-and-cellular-behavior
#6
Kyoichi Hashimoto, Yosuke Yamada, Katsunori Semi, Masaki Yagi, Akito Tanaka, Fumiaki Itakura, Hitomi Aoki, Takahiro Kunisada, Knut Woltjen, Hironori Haga, Yoshiharu Sakai, Takuya Yamamoto, Yasuhiro Yamada
The spectrum of genetic mutations differs among cancers in different organs, implying a cellular context-dependent effect for genetic aberrations. However, the extent to which the cellular context affects the consequences of oncogenic mutations remains to be fully elucidated. We reprogrammed colon tumor cells in an Apc(Min/+) (adenomatous polyposis coli) mouse model, in which the loss of the Apc gene plays a critical role in tumor development and subsequently, established reprogrammed tumor cells (RTCs) that exhibit pluripotent stem cell (PSC)-like signatures of gene expression...
January 5, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28054643/network-based-approach-to-identify-potential-targets-and-drugs-that-promote-neuroprotection-and-neurorepair-in-acute-ischemic-stroke
#7
Yiwei Wang, Hailong Liu, Yongzhong Lin, Guangming Liu, Hongwei Chu, Pengyao Zhao, Xiaohan Yang, Tiezheng Zheng, Ming Fan, Xuezhong Zhou, Jun Meng, Changkai Sun
Acute ischemic stroke (AIS) accounts for more than 80% of the approximately 610,000 new stroke cases worldwide every year. Both ischemia and reperfusion can cause death, damage, and functional changes of affected nerve cells, and these alterations can result in high rates of disability and mortality. Therefore, therapies aimed at increasing neuroprotection and neurorepair would make significant contributions to AIS management. However, with regard to AIS therapies, there is currently a large gap between experimental achievements and practical clinical solutions (EC-GAP-AIS)...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28053954/targeting-lipid-metabolic-reprogramming-as-anticancer-therapeutics
#8
REVIEW
Ji-Young Cha, Ho-Jae Lee
Cancer cells rewire their metabolism to satisfy the demands of growth and survival, and this metabolic reprogramming has been recognized as an emerging hallmark of cancer. Lipid metabolism is pivotal in cellular process that converts nutrients into energy, building blocks for membrane biogenesis and the generation of signaling molecules. Accumulating evidence suggests that cancer cells show alterations in different aspects of lipid metabolism. The changes in lipid metabolism of cancer cells can affect numerous cellular processes, including cell growth, proliferation, differentiation, and survival...
December 2016: Journal of Cancer Prevention
https://www.readbyqxmd.com/read/28053233/dual-specificity-phosphatase-5-controls-the-localized-inhibition-propagation-and-transforming-potential-of-erk-signaling
#9
Andrew M Kidger, Linda K Rushworth, Julia Stellzig, Jane Davidson, Christopher J Bryant, Cassidy Bayley, Edward Caddye, Tim Rogers, Stephen M Keyse, Christopher J Caunt
Deregulated extracellular signal-regulated kinase (ERK) signaling drives cancer growth. Normally, ERK activity is self-limiting by the rapid inactivation of upstream kinases and delayed induction of dual-specificity MAP kinase phosphatases (MKPs/DUSPs). However, interactions between these feedback mechanisms are unclear. Here we show that, although the MKP DUSP5 both inactivates and anchors ERK in the nucleus, it paradoxically increases and prolongs cytoplasmic ERK activity. The latter effect is caused, at least in part, by the relief of ERK-mediated RAF inhibition...
January 4, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28052084/linking-hematopoietic-differentiation-to-co-expressed-sets-of-pluripotency-associated-and-imprinted-genes-and-to-regulatory-microrna-transcription-factor-motifs
#10
Mohamed Hamed, Johannes Trumm, Christian Spaniol, Riccha Sethi, Mohammad R Irhimeh, Georg Fuellen, Martina Paulsen, Volkhard Helms
Maintenance of cell pluripotency, differentiation, and reprogramming are regulated by complex gene regulatory networks (GRNs) including monoallelically-expressed imprinted genes. Besides transcriptional control, epigenetic modifications and microRNAs contribute to cellular differentiation. As a model system for studying the capacity of cells to preserve their pluripotency state and the onset of differentiation and subsequent specialization, murine hematopoiesis was used and compared to embryonic stem cells (ESCs) as a control...
2017: PloS One
https://www.readbyqxmd.com/read/28049629/integrated-metabolomics-and-proteomics-highlight-altered-nicotinamide-and-polyamine-pathways-in-lung-adenocarcinoma
#11
REVIEW
Johannes F Fahrmann, Dmitry D Grapov, Kwanjeera Wanichthanarak, Brian C DeFelice, Michelle R Salemi, William N Rom, David R Gandara, Brett S Phinney, Oliver Fiehn, Harvey Pass, Suzanne Miyamoto
Lung cancer is the leading cause of cancer mortality in the United States with non-small cell lung cancer (NSCLC) adenocarcinoma being the most common histological type. Early perturbations in cellular metabolism are a hallmark of cancer, but the extent of these changes in early stage lung adenocarcinoma remains largely unknown. In the current study, an integrated metabolomics and proteomics approach was utilized to characterize the biochemical and molecular alterations between malignant and matched control tissue from 27 subjects diagnosed with early stage lung adenocarcinoma...
January 3, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28049151/modulation-of-microrna-mrna-target-pairs-by-human-papillomavirus-16-oncoproteins
#12
Mallory E Harden, Nripesh Prasad, Anthony Griffiths, Karl Munger
: The E6 and E7 proteins are the major oncogenic drivers encoded by high-risk human papillomaviruses (HPVs). While many aspects of the transforming activities of these proteins have been extensively studied, there are fewer studies that have investigated how HPV E6/E7 expression affects the expression of cellular noncoding RNAs. The goal of our study was to investigate HPV16 E6/E7 modulation of cellular microRNA (miR) levels and to determine the potential consequences for cellular gene expression...
January 3, 2017: MBio
https://www.readbyqxmd.com/read/28040634/insights-on-germinability-and-desiccation-tolerance-in-developing-neem-seeds-azadirachta-indica-role-of-aos-antioxidative-enzymes-and-dehydrin-like-protein
#13
Balram Sahu, Alok Kumar Sahu, Srinivasa Rao Chennareddy, Avinash Soni, Subhash Chandra Naithani
The germinability and desiccation tolerance (DT) in developing seed are regulated by cellular metabolism involving active oxygen species (AOS) and protective proteins during maturation drying. The aim of the present investigation was to unravel the functions of AOS (superoxide, H2O2 and OH-radical), antioxidative enzymes (SOD, CAT and APX) and dehydrin-like proteins in regulating the germinability and DT in undried and artificially desiccated developing neem seeds. Germination was first observed in seeds of 8 weeks after anthesis (waa) whereas DT was noticed from 9 waa...
December 25, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28025745/microrna-98-suppress-warburg-effect-by-targeting-hk2-in-colon-cancer-cells
#14
Weimin Zhu, Yijiao Huang, Qi Pan, Pei Xiang, Nanlan Xie, Hao Yu
BACKGROUND: Warburg effect is a hallmark of cancer cells. Accumulating evidence suggests that microRNAs (miRs) could regulate such metabolic reprograming. Aberrant expression of miR-98 has been observed in many types of cancers. However, its functions and significance in colon cancer remain largely elusive. AIMS: To investigate miR-98 expression and the biological functions in colon cancer progression. METHODS: miR-98 expression levels were determined by quantitative RT-PCR in 215 cases of colon cancer samples...
December 26, 2016: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28017795/injury-induced-senescence-enables-in%C3%A2-vivo-reprogramming-in-skeletal-muscle
#15
Aurélie Chiche, Isabelle Le Roux, Mathieu von Joest, Hiroshi Sakai, Sabela Búa Aguín, Coralie Cazin, Rana Salam, Laurence Fiette, Olinda Alegria, Patricia Flamant, Shahragim Tajbakhsh, Han Li
In vivo reprogramming is a promising approach for tissue regeneration in response to injury. Several examples of in vivo reprogramming have been reported in a variety of lineages, but some including skeletal muscle have so far proven refractory. Here, we show that acute and chronic injury enables transcription-factor-mediated reprogramming in skeletal muscle. Lineage tracing indicates that this response frequently originates from Pax7+ muscle stem cells. Injury is associated with accumulation of senescent cells, and advanced aging or local irradiation further enhanced in vivo reprogramming, while selective elimination of senescent cells reduced reprogramming efficiency...
December 22, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/28013396/transcriptomic-analysis-displays-the-effect-of-roemerine-on-the-motility-and-nutrient-uptake-in-escherichia-coli
#16
Dilara Ayyildiz, Kazim Yalcin Arga, Fatma Gizem Avci, Fatma Ece Altinisik, Caglayan Gurer, Gizem Gulsoy Toplan, Dilek Kazan, Katharina Wozny, Britta Brügger, Bulent Mertoglu, Berna Sariyar Akbulut
Among the different families of plant alkaloids, (-)-roemerine, an aporphine type, was recently shown to possess significant antibacterial activity in Escherichia coli. Based on the increasing demand for antibacterials with novel mechanisms of action, the present work investigates the potential of the plant-derived alkaloid (-)-roemerine as an antibacterial in E. coli cells using microarray technology. Analysis of the genome-wide transcriptional reprogramming in cells after 60 min treatment with 100 μg/mL (-)-roemerine showed significant changes in the expression of 241 genes (p value <0...
December 24, 2016: Current Genetics
https://www.readbyqxmd.com/read/28011833/human-induced-pluripotent-stem-cell-derived-cardiomyocytes-from-cardiac-progenitor-cells-effects-of-selective-ion-channel-blockade
#17
Claudia Altomare, Enea Pianezzi, Elisabetta Cervio, Sara Bolis, Vanessa Biemmi, Patrizia Benzoni, Giovanni G Camici, Tiziano Moccetti, Lucio Barile, Giuseppe Vassalli
AIM: Human-induced pluripotent stem cell (hiPSC)-derived cardiomyocytes are likely to revolutionize electrophysiological approaches to arrhythmias. Recent evidence suggests the somatic cell origin of hiPSCs may influence their differentiation potential. Owing to their cardiomyogenic potential, cardiac-stromal progenitor cells (CPCs) are an interesting cellular source for generation of hiPSC-derived cardiomyocytes. The effect of ionic current blockade in hiPSC-derived cardiomyocytes generated from CPCs has not been characterized yet...
December 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28011694/wind1-promotes-shoot-regeneration-through-transcriptional-activation-of-enhancer-of-shoot-regeneration1-in-arabidopsis
#18
Akira Iwase, Hirofumi Harashima, Momoko Ikeuchi, Bart Rymen, Mariko Ohnuma, Shinichiro Komaki, Kengo Morohashi, Tetsuya Kurata, Masaru Nakata, Masaru Ohme-Takagi, Erich Grotewold, Keiko Sugimoto
Many plant species display remarkable developmental plasticity and regenerate new organs after injury. Local signals produced by wounding are thought to trigger organ regeneration but molecular mechanisms underlying this control remain largely unknown. We previously identified an AP2/ERF transcription factor WOUND INDUCED DEDIFFERENTIATION 1 (WIND1) as a central regulator of wound-induced cellular reprogramming in plants. In this study, we demonstrate that WIND1 promotes callus formation and shoot regeneration by up-regulating the expression of the ENHANCER OF SHOOT REGENERATION1 (ESR1) gene, which encodes another AP2/ERF transcription factor in Arabidopsis...
December 23, 2016: Plant Cell
https://www.readbyqxmd.com/read/28009968/the-dielectrophoretic-disassociation-of-chloride-ions-and-the-influence-on-diamagnetic-anisotropy-in-cell-membranes
#19
Marcy C Purnell, Terence J Skrinjar
Chloride channels represent ubiquitously expressed proteins that regulate fundamental cellular processes including membrane potential, maintenance of intracellular pH, and regulation of cell volume. However, mechanisms to modulate this large family of ion channels have remained elusive to date. This large chloride channel family does not appear to operate with selectivity similar to the sodium and potassium channels. These unique channels appear to be bi-directional cotransporters of two or more different molecules or ions across a bilayer phospholipid membrane...
November 2016: Discovery Medicine
https://www.readbyqxmd.com/read/28009074/new-monoclonal-antibodies-to-defined-cell-surface-proteins-on-human-pluripotent-stem-cells
#20
Carmel M O'Brien, Hun S Chy, Qi Zhou, Shiri Blumenfeld, Jack W Lambshead, Xiaodong Liu, Joshua Kie, Bianca D Capaldo, Tung-Liang Chung, Timothy E Adams, Tram Phan, John D Bentley, William J Mckinstry, Karen Oliva, Paul J Mcmurrick, Yu-Chieh Wang, Fernando J Rossello, Geoffrey J Lindeman, Di Chen, Thierry Jarde, Amander T Clark, Helen E Abud, Jane E Visvader, Christian M Nefzger, Jose M Polo, Jeanne F Loring, Andrew L Laslett
The study and application of human pluripotent stem cells (hPSCs) will be enhanced by the availability of well-characterised monoclonal antibodies (mAbs) detecting cell-surface epitopes. Here we report generation of seven new mAbs that detect cell surface proteins present on live and fixed human ES cells (hESCs) and human iPS cells (hiPSCs), confirming our previous prediction that these proteins were present on the cell surface of hPSCs. The mAbs all show a high correlation with POU5F1 (OCT4) expression and other hPSC surface markers (TRA-160 and SSEA-4) in hPSC cultures and detect rare OCT4 positive cells in differentiated cell cultures...
December 23, 2016: Stem Cells
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