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ChIP-seq OR RNA-seq

Małgorzata Dawidowska, Roman Jaksik, Monika Drobna, Bronisława Szarzyńska-Zawadzka, Maria Kosmalska, Łukasz Sędek, Ludomiła Machowska, Anna Lalik, Monika Lejman, Marek Ussowicz, Krzysztof Kałwak, Jerzy R Kowalczyk, Tomasz Szczepański, Michał Witt
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive malignancy originating from T-cell precursors. The genetic landscape of T-ALL has been largely characterized by next-generation sequencing. Yet, the transcriptome of miRNAs (miRNome) of T-ALL has been less extensively studied. Using small RNA sequencing, we characterized the miRNome of 34 pediatric T-ALL samples, including the expression of isomiRs and the identification of candidate novel miRNAs (not previously annotated in miRBase). For the first time, we show that immunophenotypic subtypes of T-ALL present different miRNA expression profiles...
February 11, 2019: Neoplasia: An International Journal for Oncology Research
Timothy A Dinh, Mark L Jewell, Matt Kanke, Adam Francisco, Ramja Sritharan, Rigney E Turnham, Seona Lee, Edward R Kastenhuber, Eliane Wauthier, Cynthia D Guy, Raymond S Yeung, Scott W Lowe, Lola M Reid, John D Scott, Anna M Diehl, Praveen Sethupathy
BACKGROUND & AIMS: Fibrolamellar carcinoma is a rare liver cancer that primarily affects adolescents and young adults. It is characterized by a heterozygous ∼400 kb deletion on chromosome 19 that results in a unique DNAJB1-PRKACA fusion. The role of microRNAs (miRNAs) in FLC remains unclear. We identified dysregulated miRNAs in FLC and investigated whether dysregulation of one key miRNA contributes to FLC pathogenesis. METHODS: We analyzed small RNA sequencing (smRNA-seq) data from The Cancer Genome Atlas (TCGA) to identified dysregulated miRNAs in primary FLC tumors and validated the findings in three independent FLC cohorts...
February 11, 2019: Cellular and Molecular Gastroenterology and Hepatology
Alexander Pearlman, Mohammed Tanjimur Rahman, Kinnari Upadhyay, Johnny Loke, Harry Ostrer
Triple negative breast cancer (TNBC) is an aggressive tumor with propensity to metastasize and poor treatment options. Improving treatment options would be impactful; thus, finding a tumor-specific cell surface protein with metastasis promoting functions that could be knocked out was the goal of this study. The Otoconin 90 gene (OC90), frequently amplified in tumors on chromosome 8q24.22, was identified as a potential therapeutic candidate. Normally OC90 is expressed in the cochlea with no known function in other normal tissues...
2019: PloS One
Brandon Monier, Adam McDermaid, Cankun Wang, Jing Zhao, Allison Miller, Anne Fennell, Qin Ma
Next-Generation Sequencing has made available substantial amounts of large-scale Omics data, providing unprecedented opportunities to understand complex biological systems. Specifically, the value of RNA-Sequencing (RNA-Seq) data has been confirmed in inferring how gene regulatory systems will respond under various conditions (bulk data) or cell types (single-cell data). RNA-Seq can generate genome-scale gene expression profiles that can be further analyzed using correlation analysis, co-expression analysis, clustering, differential gene expression (DGE), among many other studies...
February 14, 2019: PLoS Computational Biology
Veroni S Sri Theivakadadcham, Benjamin G Bergey, Emanuel Rosonina
Sequence-specific transcription factors (TFs) represent one of the largest groups of proteins that is targeted for SUMO post-translational modification, in both yeast and humans. SUMO modification can have diverse effects, but recent studies showed that sumoylation reduces the interaction of multiple TFs with DNA in living cells. Whether this relates to a general role for sumoylation in TF binding site selection, however, has not been fully explored because few genome-wide studies aimed at studying such a role have been reported...
February 14, 2019: PLoS Genetics
Yan Geng, Xue Liu, Jiurong Liang, David M Habiel, Kulur Vrishika, Ana Lucia Coelho, Nan Deng, Ting Xie, Yizhou Wang, Ningshan Liu, Guanling Huang, Adrianne Kurkciyan, Zhenqiu Liu, Jie Tang, Cory M Hogaboam, Dianhua Jiang, Paul W Noble
Idiopathic pulmonary fibrosis (IPF) is a progressive disease with unremitting extracellular matrix deposition, leading to a distortion of pulmonary architecture and impaired gas exchange. Fibroblasts from IPF patients acquire an invasive phenotype that is essential for progressive fibrosis. Here, we performed RNA-seq analysis on invasive and non-invasive fibroblasts and found that the immune checkpoint ligand CD274 (PD-L1) was up-regulated on invasive lung fibroblasts and was required for the invasive phenotype of lung fibroblasts, is regulated by P53 and FAK, and drives lung fibrosis in a humanized IPF model in mice...
February 14, 2019: JCI Insight
Ludan Zhao, Yinhua Jin, Katie Donahue, Margaret Tsui, Matt Fish, Catriona Y Logan, Bruce Wang, Roel Nusse
In the liver, Wnt/β-catenin signaling is involved in regulating zonation and hepatocyte proliferation during homeostasis. We have examined Wnt gene expression and signaling after injury and we show by in situ hybridization that Wnts are activated by acute carbon tetrachloride (CCl4 ) toxicity. Following injury, peri-injury hepatocytes become Wnt-responsive, expressing the Wnt target gene Axin2. Lineage tracing of peri-injury Axin2+ hepatocytes shows that during recovery, the injured parenchyma becomes repopulated and repaired by Axin2+ descendants...
February 14, 2019: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
Yao Xiong, Kenneth C Bedi, Simon Berritt, Thomas G Brooks, Bennette K Attipoe, Kevin Wang, Kenneth B Margulies, Jeffrey Field
About one-third of dilated cardiomyopathy (DCM) cases are caused by mutations in sarcomere or cytoskeletal proteins. Yet treating the cytoskeleton directly is not possible because drugs that bind to actin are not well tolerated. Mutations in the actin binding protein CAP2 can cause DCM and knockout mice, either whole body (CAP2 KO) or cardiomyocyte-specific knockouts (CAP2 CKO), develop DCM with cardiac conduction disease. RNA-seq analysis of CAP2 KO hearts and isolated cardiomyocytes revealed over-activation of fetal genes including serum response factor (SRF) regulated genes such as Myl9 and Acta2 prior to the emergence of cardiac disease...
February 14, 2019: JCI Insight
Peng Gao, Daoquan Xiang, Teagen D Quilichini, Prakash Venglat, Prashant K Pandey, Edwin Wang, C Stewart Gillmor, Raju Datla
Embryogenesis represents a critical phase in the life cycle of flowering plants. Here, we characterize transcriptome landscapes associated with key stages of embryogenesis by combining an optimized method for the isolation of developing Arabidopsis embryos with high-throughput RNA-seq. The resulting RNA-seq datasets identify distinct overlapping patterns of gene expression, as well as temporal shifts in gene activity across embryogenesis. Network analysis revealed stage-specific and multi-stage gene expression clusters and biological functions associated with key stages of embryo development...
February 14, 2019: Plant Reproduction
Xianping Li, Liqiong Song, Siyi Zhu, Yuchun Xiao, Yuanming Huang, Yuting Hua, Qiongfang Chu, Zhihong Ren
Vancomycin-resistant Enterococcus (VRE) infection is a serious challenge for clinical management and there is no effective treatment at present. Fecal microbiota transplantation (FMT) and probiotic intervention have been shown to be promising approaches for reducing the colonization of certain pathogenic bacteria in the gastrointestinal tract, however, no such studies have been done on VRE. In this study, we evaluated the effect of FMT and two Lactobacillus strains (Y74 and HT121) on the colonization of VRE in a VRE-infection mouse model...
2019: Frontiers in Cellular and Infection Microbiology
Aanchal Mongia, Debarka Sengupta, Angshul Majumdar
Motivation: Single-cell RNA sequencing has been proved to be revolutionary for its potential of zooming into complex biological systems. Genome-wide expression analysis at single-cell resolution provides a window into dynamics of cellular phenotypes. This facilitates the characterization of transcriptional heterogeneity in normal and diseased tissues under various conditions. It also sheds light on the development or emergence of specific cell populations and phenotypes. However, owing to the paucity of input RNA, a typical single cell RNA sequencing data features a high number of dropout events where transcripts fail to get amplified...
2019: Frontiers in Genetics
Xin Wang, Changfu Li, Zilin Zhou, Yansheng Zhang
(Iso)flavonoids are one of the largest groups of natural phenolic products conferring great value to the health of plants and humans. Pueraria lobata , a legume, has long been used in Chinese traditional medicine. (Iso)flavonoids mainly present as glycosyl-conjugates and accumulate in P. lobata roots. However, the molecular mechanism underlying the glycosylation processes in (iso)flavonoid biosynthesis are not fully understood. In the current study, three novel UDP-glycosyltransferases (PlUGT4, PlUGT15, and PlUGT57) were identified in P...
2019: Frontiers in Plant Science
Shengnan Jia, Xiaodong Xu, Senhao Zhou, Yan Chen, Guoping Ding, Liping Cao
Pancreatic cancer is one of the most aggressive tumors and patients have poor survival rates. Fisetin, a natural flavonoid, was recently reported to have antitumor effects in various cancer models. Autophagy is a conserved catabolic process that maintains cellular homoeostasis in response to stress, and together with apoptosis, determines cell fate. Herein, we examined the effect of fisetin on pancreatic cancer. We reveal that fisetin inhibits PANC-1 cell proliferation using a real-time cell analysis system...
February 13, 2019: Cell Death & Disease
Xiaozhen Huang, Xiujuan Zhou, Ben Jia, Nuo Li, Jingya Jia, Mu He, Yichen He, Xiaojie Qin, Yan Cui, Chunlei Shi, Yanhong Liu, Xianming Shi
The survival mechanism of Salmonella enterica serovar Enteritidis in antibacterial egg white is not fully understood. In our lab, an egg white-resistant strain, S. Enteritidis SJTUF 10978, was identified. Cell envelope damage and osmotic stress response (separation of cell wall and inner membrane as well as cytoplasmic shrinkage) of this strain surviving in egg white were identified through microscopic observation. RNA-Seq analysis of the transcriptome of Salmonella survival in egg white showed that a considerable number of genes involved in DNA damage repair, alkaline pH adaptation, osmotic stress adaptation, envelope damage repair, Salmonella pathogenicity island 2 (SPI-2), iron absorption, and biotin synthesis were significantly upregulated (fold change ≥ 2) in egg white, indicating that these pathways or genes might be critical for bacterial survival...
February 13, 2019: MSphere
Karsten B Sieber, Anna Batorsky, Kyle Siebenthall, Kelly L Hudkins, Jeff D Vierstra, Shawn Sullivan, Aakash Sur, Michelle McNulty, Richard Sandstrom, Alex Reynolds, Daniel Bates, Morgan Diegel, Douglass Dunn, Jemma Nelson, Michael Buckley, Rajinder Kaul, Matthew G Sampson, Jonathan Himmelfarb, Charles E Alpers, Dawn Waterworth, Shreeram Akilesh
BACKGROUND: Linking genetic risk loci identified by genome-wide association studies (GWAS) to their causal genes remains a major challenge. Disease-associated genetic variants are concentrated in regions containing regulatory DNA elements, such as promoters and enhancers. Although researchers have previously published DNA maps of these regulatory regions for kidney tubule cells and glomerular endothelial cells, maps for podocytes and mesangial cells have not been available. METHODS: We generated regulatory DNA maps (DNase-seq) and paired gene expression profiles (RNA-seq) from primary outgrowth cultures of human glomeruli that were composed mainly of podocytes and mesangial cells...
February 13, 2019: Journal of the American Society of Nephrology: JASN
Yatong Han, Xiufen Ye, Jun Cheng, Siyuan Zhang, Weixing Feng, Zhi Han, Jie Zhang, Kun Huang
BACKGROUND: More than 90% of neuroblastoma patients are cured in the low-risk group while only less than 50% for those with high-risk disease can be cured. Since the high-risk patients still have poor outcomes, we need more accurate stratification to establish an individualized precise treatment plan for the patients to improve the long-term survival rate. RESULTS: We focus on extracting features and providing a workflow to improve survival prediction for neuroblastoma patients...
February 13, 2019: Biology Direct
Muzaffer A Bhat, Jai B Sharma, Kallol K Roy, Jayasree Sengupta, Debabrata Ghosh
BACKGROUND: Previous studies, which were primarily based on the fluorescent in-situ hybridisation (FISH) technique, revealed conflicting evidence regarding male foetal microchimerism in endometriosis. FISH is a relatively less sensitive technique, as it is performed on a small portion of the sample. Additionally, the probes used in the previous studies specifically detected centromeric and telomeric regions of Y chromosome, which are gene-sparse heterochromatised regions. In the present study, a panel of molecular biology tools such as qPCR, expression microarray, RNA-seq and qRT-PCR were employed to examine the Y chromosome microchimerism in the endometrium using secretory phase samples from fertile and infertile patients with severe (stage IV) ovarian endometriosis (OE) and without endometriosis...
February 13, 2019: Reproductive Biology and Endocrinology: RB&E
Dongliang Yu, Ying Wan, Hidetaka Ito, Xiaoxia Ma, Tian Xie, Tingzhang Wang, Chaogang Shao, Yijun Meng
BACKGROUND: MicroRNAs (miRNAs) constitute a well-known small RNA (sRNA) species with important regulatory roles. To date, several bioinformatics tools have been developed for large-scale prediction of miRNAs based on high-throughput sequencing data. However, some of these tools become invalid without reference genomes, while some tools cannot supply user-friendly outputs. Besides, most of the current tools focus on the importance of secondary structures and sRNA expression patterns for miRNA prediction, while they do not pay attention to miRNA processing for reliability check...
February 13, 2019: BMC Genomics
Leif E Peterson
Natural and synthetic small molecules from the NCI Developmental Therapeutics Program (DTP) were employed in molecular dynamics-based docking with DNA repair proteins whose RNA-Seq based expression was associated with overall cancer survival (OS) after adjustment for the PCNA metagene. The compounds employed were required to elicit a sensitive response (vs. resistance) in more than half of the cell lines tested for each cancer. Methodological approaches included peptide sequence alignments and homology modeling for 3D protein structure determination, ligand preparation, docking, toxicity and ADME prediction...
February 12, 2019: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Tomer Israely, Nir Paran, Noam Erez, Lilach Cherry, Hadas Tamir, Hagit Achdout, Boaz Politi, Ofir Israeli, Galia Zaide, Inbar Cohen-Gihon, Einat B Vitner, Shlomo Lustig, Sharon Melamed
Viral infections of the central nervous system (CNS) lead to a broad range of pathologies. CNS infections with Orthopox viruses have been mainly documented as an adverse reaction to smallpox vaccination with vaccinia virus. To date, there is insufficient data regarding the mechanisms underlying pathological viral replication or viral clearance. Therefore, informed risk assessment of vaccine adverse reactions or outcome prediction is limited. This work applied a model of viral infection of the CNS, comparing neurovirulent with attenuated strains...
February 12, 2019: Vaccines
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