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Artificial transcriptional factor

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https://www.readbyqxmd.com/read/29652888/sialome-diversity-of-ticks-revealed-by-rnaseq-of-single-tick-salivary-glands
#1
Jan Perner, Sára Kropáčková, Petr Kopáček, José M C Ribeiro
Ticks salivate while feeding on their hosts. Saliva helps blood feeding through host anti-hemostatic and immunomodulatory components. Previous transcriptomic and proteomic studies revealed the complexity of tick saliva, comprising hundreds of polypeptides grouped in several multi-genic families such as lipocalins, Kunitz-domain containing peptides, metalloproteases, basic tail secreted proteins, and several other families uniquely found in ticks. These studies also revealed that the composition of saliva changes with time; expression of transcripts from the same family wax and wane as a function of feeding time...
April 13, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29624006/intrinsic-and-extrinsic-molecular-determinants-or-modulators-for-epigenetic-remodeling-and-reprogramming-of-somatic-cell-derived-genome-in-mammalian-nuclear-transferred-oocytes-and-resultant-embryos
#2
M Samiec, M Skrzyszowska
The efficiency of somatic cell cloning in mammals remains disappointingly low. Incomplete and aberrant reprogramming of epigenetic memory of somatic cell nuclei in preimplantation nuclear- transferred (NT) embryos is one of the most important factors that limit the cloning effectiveness. The extent of epigenetic genome-wide alterations, involving histone or DNA methylation and histone deacetylation, that are mediated by histone-lysine methyltransferases (HMTs) or DNA methyltransferases (DNMTs) and histone deacetylases (HDACs) can be modulated/reversed via exogenous inhibitors of these enzymes throughout in vitro culture of nuclear donor cells, nuclear recipient oocytes and/or cloned embryos...
March 2018: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/29618455/juvenile-hormone-reveals-mosaic-developmental-programs-in-the-metamorphosing-optic-lobe-of-drosophila-melanogaster
#3
Lynn M Riddiford, James W Truman, Aljoscha Nern
The development of the adult optic lobe (OL) of Drosophila melanogaster is directed by a wave of ingrowth of the photoreceptors over a two day period at the outset of metamorphosis which is accompanied by the appearance of the pupal-specific transcription factor Broad-Z3 (Br-Z3) and expression of early drivers in OL neurons. During this time, there are pulses of ecdysteroids that time the metamorphic events. At the outset, the transient appearance of juvenile hormone (JH) prevents precocious development of the OL caused by the ecdysteroid peak that initiates pupariation, but the artificial maintenance of JH after this time misdirects subsequent development...
April 4, 2018: Biology Open
https://www.readbyqxmd.com/read/29617192/optical-clearing-of-the-pancreas-for-visualization-of-mature-%C3%AE-cells-and-vessels-in-mice
#4
Wataru Nishimura, Asako Sakaue-Sawano, Satoru Takahashi, Atsushi Miyawaki, Kazuki Yasuda, Yasuko Noda
Glucose metabolism is regulated by insulin, which is produced from β-cells in the pancreas. Because insulin is secreted into vessels in response to blood glucose, vascular structures of the pancreas, especially the relationship between vessels and β-cells, are important for physiological and pathological glucose metabolism. Here, we developed a system to visualize vessels surrounding mature β-cells expressing transcription factor MafA in a three-dimensional manner. Optical clearing of the pancreas prevented light scattering of fluorescence driven by the bacterial artificial chromosome (BAC)-mafA promoter in β-cells...
April 4, 2018: Islets
https://www.readbyqxmd.com/read/29577601/the-effects-of-cobalt-and-chromium-ions-on-tgf-%C3%AE-patterns-and-mineralization-in-human-osteoblast-like-mg63-and-saos-2-cells
#5
Susanne Drynda, Andreas Drynda, Bernd Feuerstein, Jörn Kekow, Christoph H Lohmann, Jessica Bertrand
Bone homeostasis, the balance of bone formation and resorption is affected by numerous influences, such as, hormones, inflammation, mechanical load, and external stimuli. The Transforming Growth Factor-beta (TGF-β), which exists in three isoforms in humans, is a major factor in the maintenance of this balance by regulating osteoblast and osteoclast maturation, development, and function. In artificial joint replacements, release of particles or ions from arthroplasties may exert local effects on the periprosthetic tissue and modulate the expression of bone specific genes and functions...
March 25, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29557633/nanochip-induced-epithelial-to-mesenchymal-transition-impact-of-physical-microenvironment-on-cancer-metastasis
#6
Udesh Dhawan, Ming-Wen Sue, Kuan Chun Lan, Waradee Buddhakosai, Pao Hui Huang, Yi Cheng Chen, Po-Chun Chen, Wen-Liang Chen
Epithelial to Mesenchymal transition (EMT) is a highly orchestrated process motivated by the nature of physical, chemical composition of Tumor Microenvironment (TME). The role of physical framework of the tumor microenvironment in guiding cells towards EMT is poorly understood. To investigate this, breast cancer MDA-MB-231 and MCF-7 cells were cultured on nanochips comprising of Tantalum oxide nanodots ranging in diameter from 10 to 200nm, fabricated through electrochemical approach and collectively referred to as artificial microenvironments...
March 20, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29544542/blockade-of-tgf-%C3%AE-smad-signaling-by-the-small-compound-hph-15-ameliorates-experimental-skin-fibrosis
#7
Vu Huy Luong, Takenao Chino, Noritaka Oyama, Takashi Matsushita, Yoko Sasaki, Dai Ogura, Shin-Ichiro Niwa, Tanima Biswas, Akiyuki Hamasaki, Mikako Fujita, Yoshinari Okamoto, Masami Otsuka, Hironobu Ihn, Minoru Hasegawa
BACKGROUND: Transforming growth factor-β (TGF-β)/Smad signaling is well known to play a critical role in the pathogenesis of systemic sclerosis (SSc). We previously developed an artificial molecule, the histidine-pyridine-histidine ligand derivative HPH-15, which may have an antifibrotic effect. The purpose of the present study was to clarify the effects of this drug in human skin fibroblasts and in a preclinical model of SSc. METHODS: The effects of HPH-15 on expression of extracellular matrix components and TGF-β signaling in human dermal fibroblasts were analyzed...
March 15, 2018: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/29538450/dknac7-a-novel-high-co2-hypoxia-induced-nac-transcription-factor-regulates-persimmon-fruit-de-astringency
#8
Rong Jin, Qing-Gang Zhu, Xin-Yue Shen, Miao-Miao Wang, Wajeeha Jamil, Donald Grierson, Xue-Ren Yin, Kun-Song Chen
Artificial high-CO2 atmosphere (AHCA, 95% CO2 and 1% O2) has been widely applied as a postharvest de-astringency treatment for persimmon fruit. AHCA increases expression of transcription factors, including ethylene response factors (DkERF), that target de-astringency genes. Here, the promoter of DkERF9, a previously characterized AHCA-inducible and de-astringency regulator, was utilized to screen a cDNA library by yeast one hybrid assay. A novel NAC transcription factor, named DkNAC7, was identified. Dual-luciferase assay indicated that DkNAC7 could not only trans-activate the promoter of DkERF9, but also activated the previously identified deastringency-related gene DkPDC2...
2018: PloS One
https://www.readbyqxmd.com/read/29537884/current-status-of-sperm-functional-genomics-and-its-diagnostic-potential-of-fertility-in-bovine-bos-taurus
#9
Sellappan Selvaraju, Sivashanmugam Parthipan, Lakshminarayana Somashekar, B Krishnan Binsila, Atul P Kolte, Arunachalam Arangasamy, Janivara Parameshwaraiah Ravindra, Stephen A Krawetz
With artificial insemination (AI) and other precision dependent assisted reproductive technologies (ART) being followed in large scale in human and animal reproduction, assessing semen quality and fertilizability is under continuous scrutiny. Various tests have been developed to predict semen quality, but so far no single, highly reliable test is available. In this regard, transcriptomic profiling of spermatozoa assumes significance as it carries the information about spermatogenesis, sperm function, and paternal roles in post-fertilization events...
March 14, 2018: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29524138/purified-protein-delivery-to-activate-an-epigenetically-silenced-allele-in-mouse-brain
#10
Benjamin Pyles, Barbara J Bailus, Henriette O'Geen, David J Segal
The ability to activate or repress specific genes in the brain could have a tremendous impact for understanding and treating neurological disorders. Artificial transcription factors based on zinc finger, TALE, and CRISPR/Cas9 programmable DNA-binding platforms have been widely used to regulate the expression of specific genes in cultured cells, but their delivery into the brain represents a critical challenge to apply such tools in live animals. In previous work, we developed a purified, zinc finger-based artificial transcription factor that could be injected systemically, cross the blood-brain barrier, and alter expression of a specific gene in the brain of an adult mouse model of Angelman syndrome...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29523820/zfp226-is-a-novel-artificial-transcription-factor-for-selective-activation-of-tumor-suppressor-kibra
#11
Katrin Schelleckes, Boris Schmitz, Malte Lenders, Mirja Mewes, Stefan-Martin Brand, Eva Brand
KIBRA has been suggested as a key regulator of the hippo pathway, regulating organ size, cell contact inhibition as well as tissue regeneration and tumorigenesis. Recently, alterations of KIBRA expression caused by promotor methylation have been reported for several types of cancer. Our current study aimed to design an artificial transcription factor capable of re-activating expression of the tumor suppressor KIBRA and the hippo pathway. We engineered a new gene named 'ZFP226' encoding for a ~23 kDa fusion protein...
March 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29518046/analysis-of-gene-regulatory-networks-of-maize-in-response-to-nitrogen
#12
Lu Jiang, Graham Ball, Charlie Hodgman, Anne Coules, Han Zhao, Chungui Lu
Nitrogen (N) fertilizer has a major influence on the yield and quality. Understanding and optimising the response of crop plants to nitrogen fertilizer usage is of central importance in enhancing food security and agricultural sustainability. In this study, the analysis of gene regulatory networks reveals multiple genes and biological processes in response to N. Two microarray studies have been used to infer components of the nitrogen-response network. Since they used different array technologies, a map linking the two probe sets to the maize B73 reference genome has been generated to allow comparison...
March 8, 2018: Genes
https://www.readbyqxmd.com/read/29504919/computational-master-regulator-search-reveals-mtor-and-pi3k-pathways-responsible-for-low-sensitivity-of-nci-h292-and-a427-lung-cancer-cell-lines-to-cytotoxic-action-of-p53-activator-nutlin-3
#13
Ulyana Boyarskikh, Sergey Pintus, Nikita Mandrik, Daria Stelmashenko, Ilya Kiselev, Ivan Evshin, Ruslan Sharipov, Philip Stegmaier, Fedor Kolpakov, Maxim Filipenko, Alexander Kel
BACKGROUND: Small molecule Nutlin-3 reactivates p53 in cancer cells by interacting with the complex between p53 and its repressor Mdm-2 and causing an increase in cancer cell apoptosis. Therefore, Nutlin-3 has potent anticancer properties. Clinical and experimental studies of Nutlin-3 showed that some cancer cells may lose sensitivity to this compound. Here we analyze possible mechanisms for insensitivity of cancer cells to Nutlin-3. METHODS: We applied upstream analysis approach implemented in geneXplain platform ( genexplain...
February 13, 2018: BMC Medical Genomics
https://www.readbyqxmd.com/read/29501702/synthetic-artificial-long-non-coding-rnas-targeting-oncogenic-micrornas-and-transcriptional-factors-inhibit-malignant-phenotypes-of-bladder-cancer-cells
#14
Haibiao Xie, Hengji Zhan, Qunjun Gao, Jianfa Li, Qun Zhou, Zhicong Chen, Yuhan Liu, Mengting Ding, Huizhong Xiao, Yuchen Liu, Weiren Huang, Zhiming Cai
Both oncogenic transcription factors (TFs) and microRNAs (miRNAs) play important roles in human cancers, acting as transcriptional and post-transcriptional regulators, respectively. These phenomena raise questions about the ability of an artificial device to simultaneously regulate miRNAs and TFs. In this study, we aimed to construct artificial long non-coding RNAs, "alncRNAs", and to investigate their therapeutic effects on bladder cancer cell lines. Based on engineering principles of synthetic biology, we combined tandem arrayed aptamer cDNA sequences for TFs with tandem arrayed cDNA copies of binding sites for the miRNAs to construct alncRNAs...
March 1, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29496966/c3g-dynamically-associates-with-nuclear-speckles-and-regulates-mrna-splicing
#15
Dhruv Kumar Shakyawar, Bhattiprolu Muralikrishna, Vegesna Radha
C3G (RapGEF1), essential for mammalian embryonic development, is ubiquitously expressed and undergoes regulated nucleo-cytoplasmic exchange. Here we show that C3G localizes to SC35 positive nuclear speckles, and regulates splicing activity. Reversible association of C3G with speckles was seen upon inhibition of transcription and splicing. C3G shows partial colocalization with SC35, and is recruited to a chromatin and RNase sensitive fraction of speckles. Its presence in speckles is dependent on intact cellular actin cytoskeleton, and is lost upon expression of the kinase, Clk1...
March 1, 2018: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/29489822/ligand-induced-perturbation-of-the-hif-2%C3%AE-arnt-dimer-dynamics
#16
Stefano Motta, Claudia Minici, Dario Corrada, Laura Bonati, Alessandro Pandini
Hypoxia inducible factors (HIFs) are transcription factors belonging to the basic helix-loop-helix PER-ARNT-SIM (bHLH-PAS) protein family with a role in sensing oxygen levels in the cell. Under hypoxia, the HIF-α degradation pathway is blocked and dimerization with the aryl hydrocarbon receptor nuclear translocator (ARNT) makes HIF-α transcriptionally active. Due to the common hypoxic environment of tumors, inhibition of this mechanism by destabilization of HIF-α:ARNT dimerization has been proposed as a promising therapeutic strategy...
February 28, 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29479793/alternative-splicing-of-oslg3b-controls-grain-length-and-yield-in-japonica-rice
#17
Jianping Yu, Jinli Miao, Zhanying Zhang, Haiyan Xiong, Xiaoyang Zhu, Xingming Sun, Yinghua Pan, Yuntao Liang, Qiang Zhang, M A R Rashid, Jinjie Li, Hongliang Zhang, Zichao Li
Grain size, one of the important components determining grain yield in rice, is controlled by the multiple quantitative trait loci (QTLs). Intensive artificial selection for grain size during domestication is evidenced in modern cultivars compared to their wild relatives. Here, we report the molecular cloning and characterization of OsLG3b, a QTL for grain length in tropical japonica rice that encodes MADS-box transcription factor 1 (OsMADS1). Six SNPs in the OsLG3b region led to alternative splicing, which were associated with grain length in an association analysis of candidate region...
February 25, 2018: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/29451902/an-artificial-mirna-system-reveals-that-relative-contribution-of-translational-inhibition-to-mirna-mediated-regulation-depends-on-environmental-and-developmental-factors-in-arabidopsis-thaliana
#18
Patrick von Born, Marti Bernardo-Faura, Ignacio Rubio-Somoza
Development and fitness of any organism rely on properly controlled gene expression. This is especially true for plants, as their development is determined by both internal and external cues. MicroRNAs (miRNAs) are embedded in the genetic cascades that integrate and translate those cues into developmental programs. miRNAs negatively regulate their target genes mainly post-transcriptionally through two co-existing mechanisms; mRNA cleavage and translational inhibition. Despite our increasing knowledge about the genetic and biochemical processes involved in those concurrent mechanisms, little is known about their relative contributions to the overall miRNA-mediated regulation...
2018: PloS One
https://www.readbyqxmd.com/read/29448919/jasmonic-acid-facilitates-flower-opening-and-floral-organ-development-through-the-upregulated-expression-of-slmyb21-transcription-factor-in-tomato
#19
Tomoko Niwa, Takamasa Suzuki, Yumiko Takebayashi, Rie Ishiguro, Tetsuya Higashiyama, Hitoshi Sakakibara, Sumie Ishiguro
Plants coordinate the timing of flower opening with pollen and gynoecium maturation to achieve successful pollination. However, little is known about how the coordination is executed. We found that flower bud development was paused immediately before flower opening in a jasmonic acid (JA)-insensitive tomato mutant, jai1-1. Phytohormone measurement and RNA analysis in flower buds revealed that newly synthesised JA peaked at two days before flower opening and the expression of a transcription factor gene SlMYB21 delayed in jai1-1...
February 2018: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/29444635/diel-pattern-of-circadian-clock-and-storage-protein-gene-expression-in-leaves-and-during-seed-filling-in-cowpea-vigna-unguiculata
#20
Julia Weiss, Marta I Terry, Marina Martos-Fuentes, Lisa Letourneux, Victoria Ruiz-Hernández, Juan A Fernández, Marcos Egea-Cortines
BACKGROUND: Cowpea (Vigna unguiculata) is an important source of protein supply for animal and human nutrition. The major storage globulins VICILIN and LEGUMIN (LEG) are synthesized from several genes including LEGA, LEGB, LEGJ and CVC (CONVICILIN). The current hypothesis is that the plant circadian core clock genes are conserved in a wide array of species and that primary metabolism is to a large extent controlled by the plant circadian clock. Our aim was to investigate a possible link between gene expression of storage proteins and the circadian clock...
February 14, 2018: BMC Plant Biology
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