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Single cell RNA seq

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https://www.readbyqxmd.com/read/27923070/macrophage-colony-stimulating-factor-derived-from-cd4-t-cells-contributes-to-control-of-a-blood-borne-infection
#1
Mary F Fontana, Gabrielly L de Melo, Chioma Anidi, Rebecca Hamburger, Chris Y Kim, So Youn Lee, Jennifer Pham, Charles C Kim
Dynamic regulation of leukocyte population size and activation state is crucial for an effective immune response. In malaria, Plasmodium parasites elicit robust host expansion of macrophages and monocytes, but the underlying mechanisms remain unclear. Here we show that myeloid expansion during P. chabaudi infection is dependent upon both CD4+ T cells and the cytokine Macrophage Colony Stimulating Factor (MCSF). Single-cell RNA-Seq analysis on antigen-experienced T cells revealed robust expression of Csf1, the gene encoding MCSF, in a sub-population of CD4+ T cells with distinct transcriptional and surface phenotypes...
December 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27909575/a-step-by-step-workflow-for-low-level-analysis-of-single-cell-rna-seq-data
#2
Aaron T L Lun, Davis J McCarthy, John C Marioni
Single-cell RNA sequencing (scRNA-seq) is widely used to profile the transcriptome of individual cells. This provides biological resolution that cannot be matched by bulk RNA sequencing, at the cost of increased technical noise and data complexity. The differences between scRNA-seq and bulk RNA-seq data mean that the analysis of the former cannot be performed by recycling bioinformatics pipelines for the latter. Rather, dedicated single-cell methods are required at various steps to exploit the cellular resolution while accounting for technical noise...
2016: F1000Research
https://www.readbyqxmd.com/read/27904804/mining-snps-in-extracellular-vesicular-transcriptome-of-trypanosoma-cruzi-a-step-closer-to-early-diagnosis-of-neglected-chagas-disease
#3
Pallavi Gaur, Anoop Chaturvedi
One of the newest and strongest members of intercellular communicators, the Extracellular vesicles (EVs) and their enclosed RNAs; Extracellular RNAs (exRNAs) have been acknowledged as putative biomarkers and therapeutic targets for various diseases. Although a very deep insight has not been possible into the physiology of these vesicles, they are believed to be involved in cell-to-cell communication and host-pathogen interactions. EVs might be significantly helpful in discovering biomarkers for possible target identification as well as prognostics, diagnostics and developing vaccines...
2016: PeerJ
https://www.readbyqxmd.com/read/27903987/mapping-heterogeneity-in-patient-derived-melanoma-cultures-by-single-cell-rna-seq
#4
Tobias Gerber, Edith Willscher, Henry Loeffler-Wirth, Lydia Hopp, Dirk Schadendorf, Manfred Schartl, Ulf Anderegg, Gray Camp, Barbara Treutlein, Hans Binder, Manfred Kunz
Recent technological advances in single-cell genomics make it possible to analyze cellular heterogeneity of tumor samples. Here, we applied single-cell RNA-seq to measure the transcriptomes of 307 single cells cultured from three biopsies of three different patients with a BRAF/NRAS wild type, BRAF mutant/NRAS wild type and BRAF wild type/NRAS mutant melanoma metastasis, respectively. Analysis based on self-organizing maps identified sub-populations defined by multiple gene expression modules involved in proliferation, oxidative phosphorylation, pigmentation and cellular stroma...
November 26, 2016: Oncotarget
https://www.readbyqxmd.com/read/27900322/patterns-of-transposable-element-expression-and-insertion-in-cancer
#5
Evan A Clayton, Lu Wang, Lavanya Rishishwar, Jianrong Wang, John F McDonald, I King Jordan
Human transposable element (TE) activity in somatic tissues causes mutations that can contribute to tumorigenesis. Indeed, TE insertion mutations have been implicated in the etiology of a number of different cancer types. Nevertheless, the full extent of somatic TE activity, along with its relationship to tumorigenesis, have yet to be fully explored. Recent developments in bioinformatics software make it possible to analyze TE expression levels and TE insertional activity directly from transcriptome (RNA-seq) and whole genome (DNA-seq) next-generation sequence data...
2016: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/27897007/production-of-a-preliminary-quality-control-pipeline-for-single-nuclei-rna-seq-and-its-application-in-the-analysis-of-cell-type-diversity-of-post-mortem-human-brain-neocortex
#6
Brian Aevermann, Jamison McCorrison, Pratap Venepally, Rebecca Hodge, Trygve Bakken, Jeremy Miller, Mark Novotny, Danny N Tran, Francisco Diezfuertes, Lena Christiansen, Fan Zhang, Frank Steemers, Roger S Lasken, E D Lein, Nicholas Schork, Richard H Scheuermann
Next generation sequencing of the RNA content of single cells or single nuclei (sc/nRNA-seq) has become a powerful approach to understand the cellular complexity and diversity of multicellular organisms and environmental ecosystems. However, the fact that the procedure begins with a relatively small amount of starting material, thereby pushing the limits of the laboratory procedures required, dictates that careful approaches for sample quality control (QC) are essential to reduce the impact of technical noise and sample bias in downstream analysis applications...
2016: Pacific Symposium on Biocomputing
https://www.readbyqxmd.com/read/27890926/cancer-genomics-single-cell-rna-seq-to-decipher-tumour-architecture
#7
Ross Cloney
No abstract text is available yet for this article.
November 28, 2016: Nature Reviews. Genetics
https://www.readbyqxmd.com/read/27888678/cerebral-cortical-neuron-diversity-and-development-at-single-cell-resolution
#8
REVIEW
Matthew B Johnson, Christopher A Walsh
Over a century of efforts to categorize the astonishing diversity of cortical neurons has relied on criteria of morphology, electrophysiology, ontology, and the expression of a few transcripts and proteins. The rapid development of single-cell RNA sequencing (scRNA-seq) adds genome-wide gene expression patterns to this list of criteria, and promises to reveal new insights into the transitions that establish neuronal identity during development, differentiation, activity, and disease. Comparing single neuron data to reference atlases constructed from hundreds of thousands of single-cell transcriptomes will be critical to understanding these transitions and the molecular mechanisms that drive them...
November 23, 2016: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/27883053/measuring-intratumor-heterogeneity-by-network-entropy-using-rna-seq-data
#9
Youngjune Park, Sangsoo Lim, Jin-Wu Nam, Sun Kim
Intratumor heterogeneity (ITH) is observed at different stages of tumor progression, metastasis and reouccurence, which can be important for clinical applications. We used RNA-sequencing data from tumor samples, and measured the level of ITH in terms of biological network states. To model complex relationships among genes, we used a protein interaction network to consider gene-gene dependency. ITH was measured by using an entropy-based distance metric between two networks, nJSD, with Jensen-Shannon Divergence (JSD)...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27881084/assessing-characteristics-of-rna-amplification-methods-for-single-cell-rna-sequencing
#10
Hannah R Dueck, Rizi Ai, Adrian Camarena, Bo Ding, Reymundo Dominguez, Oleg V Evgrafov, Jian-Bing Fan, Stephen A Fisher, Jennifer S Herstein, Tae Kyung Kim, Jae Mun Hugo Kim, Ming-Yi Lin, Rui Liu, William J Mack, Sean McGroty, Joseph D Nguyen, Neeraj Salathia, Jamie Shallcross, Tade Souaiaia, Jennifer M Spaethling, Christopher P Walker, Jinhui Wang, Kai Wang, Wei Wang, Andre Wildberg, Lina Zheng, Robert H Chow, James Eberwine, James A Knowles, Kun Zhang, Junhyong Kim
BACKGROUND: Recently, measurement of RNA at single cell resolution has yielded surprising insights. Methods for single-cell RNA sequencing (scRNA-seq) have received considerable attention, but the broad reliability of single cell methods and the factors governing their performance are still poorly known. RESULTS: Here, we conducted a large-scale control experiment to assess the transfer function of three scRNA-seq methods and factors modulating the function. All three methods detected greater than 70% of the expected number of genes and had a 50% probability of detecting genes with abundance greater than 2 to 4 molecules...
November 24, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27878653/single-cell-rna-seq-reveals-lincrna-expression-differences-in-hela-s3-cells
#11
Jie Wang, Bhaskar Roy
OBJECTIVE: To characterize transcriptome-wide lincRNAs of Hela-S3 cell line by analyzing RNA sequencing data to provide a foundation for further functional verification and clinical application of cervical carcinoma development. RESULTS: Single-cell RNA sequencing data of 37 Hela-S3 cells were analysed. On average, 511 lincRNAs were expressed in each cell. Comparing the expression difference of the lincRNAs and protein-coding genes, we found that lincRNAs expression displayed more cell specificity than that of protein-coding genes (t-test, P<2...
November 23, 2016: Biotechnology Letters
https://www.readbyqxmd.com/read/27873472/perfect-timing-splicing-and-transcription-rates-in-living-cells
#12
REVIEW
Tara Alpert, Lydia Herzel, Karla M Neugebauer
An important step toward understanding gene regulation is the elucidation of the time necessary for the completion of individual steps. Measurement of reaction rates can reveal potential nodes for regulation. For example, measurements of in vivo transcription elongation rates reveal regulation by DNA sequence, gene architecture, and chromatin. Pre-mRNA splicing is regulated by transcription elongation rates and vice versa, yet the rates of RNA processing reactions remain largely elusive. Since the 1980s, numerous model systems and approaches have been used to determine the precise timing of splicing in vivo...
November 21, 2016: Wiley Interdisciplinary Reviews. RNA
https://www.readbyqxmd.com/read/27848892/single-cell-sequencing-for-drug-discovery-and-drug-development
#13
Hongjin Wu, Charles Wang, Shixiu Wu
Next-generation sequencing (NGS), particularly single-cell sequencing, has revolutionized the scale and scope of genomic and biomedical research. Recent technological advances in NGS and single-cell studies have made the deep whole-genome (DNA-seq), whole epigenome and whole-transcriptome sequencing (RNA-seq) at single-cell level feasible. NGS at the single-cell level expands our view of genome, epigenome and transcriptome and allows the genome, epigenome and transcriptome of any organism to be explored without a priori assumptions and with unprecedented throughput...
November 16, 2016: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/27835649/human-oocyte-derived-methylation-differences-persist-in-the-placenta-revealing-widespread-transient-imprinting
#14
Marta Sanchez-Delgado, Franck Court, Enrique Vidal, Jose Medrano, Ana Monteagudo-Sánchez, Alex Martin-Trujillo, Chiharu Tayama, Isabel Iglesias-Platas, Ivanela Kondova, Ronald Bontrop, Maria Eugenia Poo-Llanillo, Tomas Marques-Bonet, Kazuhiko Nakabayashi, Carlos Simón, David Monk
Thousands of regions in gametes have opposing methylation profiles that are largely resolved during the post-fertilization epigenetic reprogramming. However some specific sequences associated with imprinted loci survive this demethylation process. Here we present the data describing the fate of germline-derived methylation in humans. With the exception of a few known paternally methylated germline differentially methylated regions (DMRs) associated with known imprinted domains, we demonstrate that sperm-derived methylation is reprogrammed by the blastocyst stage of development...
November 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27829232/circular-rnas-and-their-associations-with-breast-cancer-subtypes
#15
Asha A Nair, Nifang Niu, Xiaojia Tang, Kevin J Thompson, Liewei Wang, Jean-Pierre Kocher, Subbaya Subramanian, Krishna R Kalari
Circular RNAs (circRNAs) are highly stable forms of non-coding RNAs with diverse biological functions. They are implicated in modulation of gene expression thus affecting various cellular and disease processes. Based on existing bioinformatics approaches, we developed a comprehensive workflow called Circ-Seq to identify and report expressed circRNAs. Circ-Seq also provides informative genomic annotation along circRNA fused junctions thus allowing prioritization of circRNA candidates. We applied Circ-Seq first to RNA-sequence data from breast cancer cell lines and validated one of the large circRNAs identified...
November 5, 2016: Oncotarget
https://www.readbyqxmd.com/read/27824854/revealing-the-vectors-of-cellular-identity-with-single-cell-genomics
#16
Allon Wagner, Aviv Regev, Nir Yosef
Single-cell genomics has now made it possible to create a comprehensive atlas of human cells. At the same time, it has reopened definitions of a cell's identity and of the ways in which identity is regulated by the cell's molecular circuitry. Emerging computational analysis methods, especially in single-cell RNA sequencing (scRNA-seq), have already begun to reveal, in a data-driven way, the diverse simultaneous facets of a cell's identity, from discrete cell types to continuous dynamic transitions and spatial locations...
November 8, 2016: Nature Biotechnology
https://www.readbyqxmd.com/read/27821074/a-quantitative-transcriptomic-analysis-of-the-physiological-significance-of-mtor-signaling-in-goat-fetal-fibroblasts
#17
Yuting Fu, Xu Zheng, Xiaoyang Jia, Uyanga Binderiya, Yanfeng Wang, Wenlei Bao, Lili Bao, Keyu Zhao, Yu Fu, Huifang Hao, Zhigang Wang
BACKGROUND: Mammalian target of rapamycin (mTOR) is an evolutionarily conserved serine/threonine kinase that is a central regulator of cell growth and metabolism. CCI-779 is a specific inhibitor of the mTORC1 signaling pathway. RESULTS: We performed comparative transcriptome profiling on Inner Mongolia Cashmere goat fetal fibroblasts (GFbs) that were treated with CCI-779 and untreated cells. A total of 365 differentially expressed genes (DEGs) appeared between untreated and CCI-779-treated GFbs, with an FDR ≤0...
November 7, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27806689/functional-variants-of-human-papillomavirus-type-16-demonstrate-host-genome-integration-and-transcriptional-alterations-corresponding-to-their-unique-cancer-epidemiology
#18
Robert Jackson, Bruce A Rosa, Sonia Lameiras, Sean Cuninghame, Josee Bernard, Wely B Floriano, Paul F Lambert, Alain Nicolas, Ingeborg Zehbe
BACKGROUND: Human papillomaviruses (HPVs) are a worldwide burden as they are a widespread group of tumour viruses in humans. Having a tropism for mucosal tissues, high-risk HPVs are detected in nearly all cervical cancers. HPV16 is the most common high-risk type but not all women infected with high-risk HPV develop a malignant tumour. Likely relevant, HPV genomes are polymorphic and some HPV16 single nucleotide polymorphisms (SNPs) are under evolutionary constraint instigating variable oncogenicity and immunogenicity in the infected host...
November 2, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27806376/single-cell-rna-seq-supports-a-developmental-hierarchy-in-human-oligodendroglioma
#19
Itay Tirosh, Andrew S Venteicher, Christine Hebert, Leah E Escalante, Anoop P Patel, Keren Yizhak, Jonathan M Fisher, Christopher Rodman, Christopher Mount, Mariella G Filbin, Cyril Neftel, Niyati Desai, Jackson Nyman, Benjamin Izar, Christina C Luo, Joshua M Francis, Aanand A Patel, Maristela L Onozato, Nicolo Riggi, Kenneth J Livak, Dave Gennert, Rahul Satija, Brian V Nahed, William T Curry, Robert L Martuza, Ravindra Mylvaganam, A John Iafrate, Matthew P Frosch, Todd R Golub, Miguel N Rivera, Gad Getz, Orit Rozenblatt-Rosen, Daniel P Cahill, Michelle Monje, Bradley E Bernstein, David N Louis, Aviv Regev, Mario L Suvà
Although human tumours are shaped by the genetic evolution of cancer cells, evidence also suggests that they display hierarchies related to developmental pathways and epigenetic programs in which cancer stem cells (CSCs) can drive tumour growth and give rise to differentiated progeny. Yet, unbiased evidence for CSCs in solid human malignancies remains elusive. Here we profile 4,347 single cells from six IDH1 or IDH2 mutant human oligodendrogliomas by RNA sequencing (RNA-seq) and reconstruct their developmental programs from genome-wide expression signatures...
November 2, 2016: Nature
https://www.readbyqxmd.com/read/27805251/in-silico-rna-seq-and-experimental-analyses-reveal-the-differential-expression-and-splicing-of-epdr1-and-znf518b-genes-in-relation-to-kras-mutations-in-colorectal-cancer-cells
#20
Ángela L Riffo-Campos, Josefa Castillo, Azahara Vallet-Sánchez, Guillermo Ayala, Andrés Cervantes, Gerardo López-Rodas, Luis Franco
Several drugs used for the treatment of colorectal cancer (CRC) are targeted at the epidermal growth factor receptor, but mutations in genes of the RAS family cause resistance to these drugs. Thus, extensive research is being carried out to counterbalance this resistance. The G13D mutation of KRAS is common in humans, and we previously reported that this mutation results in the epigenetic modification of hnRNP proteins, involved in RNA splicing. As aberrant splicing often results in oncogenicity, the present study aimed to identify the genes which show altered splicing patterns in connection with the G13D KRAS mutation...
October 27, 2016: Oncology Reports
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