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https://www.readbyqxmd.com/read/28527333/transcriptome-wide-analysis-of-jasmonate-treated-by-2-cells-reveals-new-transcriptional-regulators-associated-with-alkaloid-formation-in-tobacco
#1
Yuping Yang, Pengcheng Yan, Che Yi, Wenzheng Li, Yuhui Chai, Lingling Fei, Ping Gao, Heping Zhao, Yingdian Wang, Michael P Timko, Bingwu Wang, Shengcheng Han
Jasmonates (JAs) are well-known regulators of stress, defence, and secondary metabolism in plants, with JA perception triggering extensive transcriptional reprogramming, including both activation and/or repression of entire metabolic pathways. We performed RNA sequencing based transcriptomic profiling of tobacco BY-2 cells before and after treatment with methyl jasmonate (MeJA) to identify novel transcriptional regulators associated with alkaloid formation. A total of 107,140 unigenes were obtained through de novo assembly, and at least 33,213 transcripts (31%) encode proteins, in which 3419 transcription factors (TFs) were identified, representing 72 gene families, as well as 840 transcriptional regulators (TRs) distributed among 19 gene families...
May 4, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28526819/systematic-comparison-of-2a-peptides-for-cloning-multi-genes-in-a-polycistronic-vector
#2
Ziqing Liu, Olivia Chen, J Blake Joseph Wall, Michael Zheng, Yang Zhou, Li Wang, Haley Ruth Vaseghi, Li Qian, Jiandong Liu
Cloning of multiple genes in a single vector has greatly facilitated both basic and translational studies that require co-expression of multiple factors or multi-units of complex protein. Many strategies have been adopted, among which 2A "self-cleaving" peptides have garnered increased interest for their polycistronic nature, small size and high "cleavage" efficiency. However, broad application of 2 A peptides is limited by the lack of systematic comparison of different 2As alone or in combination. Here we characterized the effect of varying gene position and 2As on the expression of proteins encoded in bi-, tri-, or quad-cistronic constructs...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526301/mfg-e8-reprogramming-of-macrophages-promotes-wound-healing-by-increased-bfgf-production-and-fibroblast-functions
#3
Patrick Laplante, Frédéric Brillant-Marquis, Marie-Joëlle Brissette, Benjamin Joannette-Pilon, Romain Cayrol, Victor Kokta, Jean-François Cailhier
Macrophages are essential for tissue repair. They have a crucial role in cutaneous wound healing, participating actively in the inflammation phase of the process. Unregulated macrophage activation may, however, represent a source of excessive inflammation leading to abnormal wound healing and hypertrophic scars. Our research group has demonstrated that apoptotic endothelial and epithelial cells secrete Milk Fat Globule Epidermal Growth Factor-8 (MFG-E8), which has the ability to reprogram macrophages from a M1 (pro-inflammatory) to a M2 (anti-inflammatory pro-repair) phenotype...
May 16, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28526133/metabolic-reprogramming-and-oncogenesis-one-hallmark-many-organelles
#4
A S H Costa, C Frezza
The process of tumorigenesis can be described by a series of molecular features, among which alteration of cellular metabolism has recently emerged. This metabolic rewiring fulfills the energy and biosynthetic demands of fast proliferating cancer cells and amplifies their metabolic repertoire to survive and proliferate in the poorly oxygenated and nutrient-deprived tumor microenvironment. During the last decade, the complex reprogramming of cancer cell metabolism has been widely investigated, revealing cancer-specific metabolic alterations...
2017: International Review of Cell and Molecular Biology
https://www.readbyqxmd.com/read/28525376/exploiting-ros-and-metabolic-differences-to-kill-cisplatin-resistant-lung-cancer
#5
Medhi Wangpaichitr, Chunjing Wu, Ying Ying Li, Dan J M Nguyen, Hande Kandemir, Sumedh Shah, Shumei Chen, Lynn G Feun, Jeffrey S Prince, Macus T Kuo, Niramol Savaraj
Cisplatin resistance remains a major problem in the treatment of lung cancer. We have discovered that cisplatin resistant (CR) lung cancer cells, regardless of the signaling pathway status, share the common parameter which is an increase in reactive oxygen species (ROS) and undergo metabolic reprogramming. CR cells were no longer addicted to the glycolytic pathway, but rather relied on oxidative metabolism. They took up twice as much glutamine and were highly sensitive to glutamine deprivation. Glutamine is hydrolyzed to glutamate for glutathione synthesis, an essential factor to abrogate high ROS via xCT antiporter...
May 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28523547/dna-methylation-in-major-depressive-disorder
#6
Ehsan Pishva, Bart P F Rutten, Daniel van den Hove
Epigenetic mechanisms regulate gene expression, influencing protein levels and ultimately shaping phenotypes during life. However, both stochastic epigenetic variations and environmental reprogramming of the epigenome might influence neurodevelopment and ageing, and this may contribute to the origins of mental ill-health. Studying the role of epigenetic mechanisms is challenging, as genotype-, tissue- and cell type-dependent epigenetic changes have to be taken into account, while the nature of mental disorders also poses significant challenges for linking them with biological profiles...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28523248/the-keap1-nrf2-system-in-cancer
#7
REVIEW
Keiko Taguchi, Masayuki Yamamoto
Cancer cells first adapt to the microenvironment and then propagate. Mutations in tumor suppressor genes or oncogenes are frequently found in cancer cells. Comprehensive genomic analyses have identified somatic mutations and other alterations in the KEAP1 or NRF2 genes and in well-known tumor suppressor genes or oncogenes, such as TP53, CDKN2A, PTEN, and PIK3CA, in various types of cancer. Aberrant NRF2 activation in cancer cells occurs through somatic mutations in the KEAP1 or NRF2 gene as well as through other mechanisms that disrupt the binding of KEAP1 to NRF2...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28522693/histone-h3-3k27m-represses-p16-to-accelerate-gliomagenesis-in-a-murine-model-of-dipg
#8
Francisco J Cordero, Zhiqing Huang, Carole Grenier, Xingyao He, Guo Hu, Roger E McLendon, Susan K Murphy, Rintaro Hashizume, Oren J Becher
Diffuse Intrinsic Pontine Glioma (DIPG) is a highly aggressive pediatric brainstem tumor genetically distinguished from adult GBM by the high prevalence of the K27M mutation in the histone H3 variant H3.3 (H3F3A). This mutation reprograms the H3K27me3 epigenetic landscape of DIPG by inhibiting the H3K27-specific histone methyltransferase EZH2. This globally reduces H3K27me2/3, critical repressive marks responsible for cell fate decisions, and also causes focal gain of H3K27me3 throughout the epigenome. To date the tumor-driving effects of H3...
May 18, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28522596/lysyl-oxidase-overexpression-accelerates-cardiac-remodeling-and-aggravates-angiotensin-ii-induced-hypertrophy
#9
María Galán, Saray Varona, Anna Guadall, Mar Orriols, Miquel Navas, Silvia Aguiló, Alicia de Diego, María A Navarro, David García-Dorado, Antonio Rodríguez-Sinovas, José Martínez-González, Cristina Rodriguez
Lysyl oxidase (LOX) controls matrix remodeling, a key process that underlies cardiovascular diseases and heart failure; however, a lack of suitable animal models has limited our knowledge with regard to the contribution of LOX to cardiac dysfunction. Here, we assessed the impact of LOX overexpression on ventricular function and cardiac hypertrophy in a transgenic mouse model with a strong cardiac expression of human LOX (TgLOX). TgLOX mice exhibited high expression of the transgene in cardiomyocytes and cardiofibroblasts, which are associated with enhanced LOX activity and H2O2 production and with cardiofibroblast reprogramming...
May 18, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28521626/experimental-evolution-of-resistance-against-bacillus-thuringiensis-in-the-insect-model-host-galleria-mellonella-results-in-epigenetic-modifications
#10
Krishnendu Mukherjee, Ekaterina Grizanova, Ekaterina Chertkova, Ruediger Lehmann, Ivan Dubovskiy, Andreas Vilcinskas
Epigenetic mechanisms have been proposed to translate environmental stimuli into heritable transgenerational phenotypic variations that can significantly influence natural selection. An intriguing example is exposure to pathogens, which imposes selection for host resistance. To test this hypothesis, we used larvae of the greater wax moth Galleria mellonella as model host to experimentally select for resistance to Bacillus thuringiensis (Bt), the most widely used bacterial agent for the biological control of pest insects...
May 19, 2017: Virulence
https://www.readbyqxmd.com/read/28521236/targeting-t-cell-metabolism-to-regulate-t-cell-activation-differentiation-and-function-in-disease
#11
REVIEW
Chirag H Patel, Jonathan D Powell
It is becoming increasingly clear that metabolic reprogramming plays a critical role in T cell activation, differentiation and function. To this end, cellular metabolism not only meets the energetic demands of T cells but also provides critical substrates for their growth and function. Furthermore, metabolites themselves are emerging as key regulators of immune responses. As the details of how metabolic reprogramming regulates immune function are revealed, new potential targets for modulating immune responses have emerged...
May 15, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28520800/transcriptome-profiling-revealed-novel-transcriptional-regulators-in-maize-responses-to-ostrinia-furnacalis-and-jasmonic-acid
#12
Hai Wang, Shengyan Li, Shouzhen Teng, Haisheng Liang, Hongjia Xin, Hongjiang Gao, Dafang Huang, Zhihong Lang
Chewing insects cause severe yield losses in crop production worldwide. Crop plants counteract chewing insects by transcriptionally promoting a repertoire of defense gene products that are either toxic to, or attractive to the natural enemies of, pest insects. However, the complexity of the transcriptional reprogramming in plant defense response against chewing insects is still not well understood. In this study, the genome-wide early responses in maize seedlings to Asian corn borer (ACB, Ostrinia furnacalis) and also to jasmonic acid(JA), the pivotal phytohormone controlling plant defense response against herbivory, were transcriptionally profiled by RNA-Seq...
2017: PloS One
https://www.readbyqxmd.com/read/28516914/adenylate-kinase-hcinap-determines-self-renewal-of-colorectal-cancer-stem-cells-by-facilitating-ldha-phosphorylation
#13
Yapeng Ji, Chuanzhen Yang, Zefang Tang, Yongfeng Yang, Yonglu Tian, Hongwei Yao, Xi Zhu, Zeming Zhang, Jiafu Ji, Xiaofeng Zheng
Targeting the specific metabolic phenotypes of colorectal cancer stem cells (CRCSCs) is an innovative therapeutic strategy for colorectal cancer (CRC) patients with poor prognosis and relapse. However, the context-dependent metabolic traits of CRCSCs remain poorly elucidated. Here we report that adenylate kinase hCINAP is overexpressed in CRC tissues. Depletion of hCINAP inhibits invasion, self-renewal, tumorigenesis and chemoresistance of CRCSCs with a loss of mesenchymal signature. Mechanistically, hCINAP binds to the C-terminal domain of LDHA, the key regulator of glycolysis, and depends on its adenylate kinase activity to promote LDHA phosphorylation at tyrosine 10, resulting in the hyperactive Warburg effect and the lower cellular ROS level and conferring metabolic advantage to CRCSC invasion...
May 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28516428/cerebrovascular-angiogenic-reprogramming-upon-lrp1-repression-impact-on-sphingosine-1-phosphate-mediated-signaling-in-brain-endothelial-cell-chemotactism
#14
Amélie Vézina, Cyndia Charfi, Alain Zgheib, Borhane Annabi
Switches in sphingolipid metabolism have recently been associated with oncogenic transformation, and a role for the low-density lipoprotein receptor-related protein 1 (LRP1) in sphingosine-1-phosphate (S1P) proangiogenic signaling inferred. S1P signaling crosstalk with LRP1 in brain microvascular endothelial cells (HBMEC) is however unclear. Transient in vitro siLRP1 gene silencing was compared to stable shLRP1 knockdown. We observed decreased expression of CCAAT/enhancer binding protein β (C/EBPβ), a transcription factor for which multiple binding sites are found within the promoter sequences of all five S1P receptor members, upon stable but not transient LRP1 repression...
May 17, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28515784/improving-saccharomyces-cerevisiae-ethanol-production-and-tolerance-via-rna-polymerase-ii-subunit-rpb7
#15
Zilong Qiu, Rongrong Jiang
BACKGROUND: Classical strain engineering methods often have limitations in altering multigenetic cellular phenotypes. Here we try to improve Saccharomyces cerevisiae ethanol tolerance and productivity by reprogramming its transcription profile through rewiring its key transcription component RNA polymerase II (RNAP II), which plays a central role in synthesizing mRNAs. This is the first report on using directed evolution method to engineer RNAP II to alter S. cerevisiae strain phenotypes...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28515690/brain-renin-angiotensin-system-and-microglial-polarization-implications-for-aging-and-neurodegeneration
#16
REVIEW
Jose L Labandeira-Garcia, Ana I Rodríguez-Perez, Pablo Garrido-Gil, Jannette Rodriguez-Pallares, Jose L Lanciego, Maria J Guerra
Microglia can transform into proinflammatory/classically activated (M1) or anti-inflammatory/alternatively activated (M2) phenotypes following environmental signals related to physiological conditions or brain lesions. An adequate transition from the M1 (proinflammatory) to M2 (immunoregulatory) phenotype is necessary to counteract brain damage. Several factors involved in microglial polarization have already been identified. However, the effects of the brain renin-angiotensin system (RAS) on microglial polarization are less known...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28515464/systems-immunology-of-diabetes-tuberculosis-comorbidity-reveals-signatures-of-disease-complications
#17
Cesar A Prada-Medina, Kiyoshi F Fukutani, Nathella Pavan Kumar, Leonardo Gil-Santana, Subash Babu, Flávio Lichtenstein, Kim West, Shanmugam Sivakumar, Pradeep A Menon, Vijay Viswanathan, Bruno B Andrade, Helder I Nakaya, Hardy Kornfeld
Comorbid diabetes mellitus (DM) increases tuberculosis (TB) risk and adverse outcomes but the pathological interactions between DM and TB remain incompletely understood. We performed an integrative analysis of whole blood gene expression and plasma analytes, comparing South Indian TB patients with and without DM to diabetic and non-diabetic controls without TB. Luminex assay of plasma cytokines and growth factors delineated a distinct biosignature in comorbid TBDM in this cohort. Transcriptional profiling revealed elements in common with published TB signatures from cohorts that excluded DM...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28515448/involvement-of-vascular-aldosterone-synthase-in-phosphate-induced-osteogenic-transformation-of-vascular-smooth-muscle-cells
#18
Ioana Alesutan, Jakob Voelkl, Martina Feger, Denise V Kratschmar, Tatsiana Castor, Sobuj Mia, Michael Sacherer, Robert Viereck, Oliver Borst, Christina Leibrock, Meinrad Gawaz, Makoto Kuro-O, Stefan Pilz, Andreas Tomaschitz, Alex Odermatt, Burkert Pieske, Carsten A Wagner, Florian Lang
Vascular calcification resulting from hyperphosphatemia is a major determinant of mortality in chronic kidney disease (CKD). Vascular calcification is driven by aldosterone-sensitive osteogenic transformation of vascular smooth muscle cells (VSMCs). We show that even in absence of exogenous aldosterone, silencing and pharmacological inhibition (spironolactone, eplerenone) of the mineralocorticoid receptor (MR) ameliorated phosphate-induced osteo-/chondrogenic transformation of primary human aortic smooth muscle cells (HAoSMCs)...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28515438/mitochondrial-retrograde-signaling-connects-respiratory-capacity-to-thermogenic-gene-expression
#19
Minwoo Nam, Thomas E Akie, Masato Sanosaka, Siobhan M Craige, Shashi Kant, John F Keaney, Marcus P Cooper
Mitochondrial respiration plays a crucial role in determining the metabolic state of brown adipose tissue (BAT), due to its direct roles in thermogenesis, as well as through additional mechanisms. Here, we show that respiration-dependent retrograde signaling from mitochondria to nucleus contributes to genetic and metabolic reprogramming of BAT. In mouse BAT, ablation of LRPPRC (LRP130), a potent regulator of mitochondrial transcription and respiratory capacity, triggers down-regulation of thermogenic genes, promoting a storage phenotype in BAT...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28515364/nicotinamide-metabolism-regulates-glioblastoma-stem-cell-maintenance
#20
Jinkyu Jung, Leo J Y Kim, Xiuxing Wang, Qiulian Wu, Tanwarat Sanvoranart, Christopher G Hubert, Briana C Prager, Lisa C Wallace, Xun Jin, Stephen C Mack, Jeremy N Rich
Metabolic dysregulation promotes cancer growth through not only energy production, but also epigenetic reprogramming. Here, we report that a critical node in methyl donor metabolism, nicotinamide N-methyltransferase (NNMT), ranked among the most consistently overexpressed metabolism genes in glioblastoma relative to normal brain. NNMT was preferentially expressed by mesenchymal glioblastoma stem cells (GSCs). NNMT depletes S-adenosyl methionine (SAM), a methyl donor generated from methionine. GSCs contained lower levels of methionine, SAM, and nicotinamide, but they contained higher levels of oxidized nicotinamide adenine dinucleotide (NAD+) than differentiated tumor cells...
May 18, 2017: JCI Insight
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