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https://www.readbyqxmd.com/read/28516569/stat4-expression-and-activation-is-increased-during-mitosis-in-vitro-and-in-vivo-in-skin-and-mucosa-derived-cell-types-implications-in-neoplastic-and-inflammatory-skin-diseases
#1
Caterina Ferreli, Chester Lai, Suzannah August, Yvonne Buggy, Pawan Kumar, Nicola Brownlow, Peter Parker, Peter S Friedmann, Michael Ardern-Jones, Chris Pickard, Eugene Healy
BACKGROUND: The signal transducer and activator of transcription-4 (STAT4/Stat4) is a transcription factor known to convey signals from interleukin-12, interleukin-23, and interferon-alpha/beta to the nucleus, resulting in activation of dendritic cells, T-helper cell differentiation and production of interferon-gamma. OBJECTIVE: To demonstrate a novel role for STAT4 in cell mitosis. RESULTS: Phosphoserine STAT4 (pSerSTAT4) is increased in cells undergoing mitosis, and is distributed throughout the cytoplasm during this stage of the cell cycle whilst phosphotyrosine STAT4 (pTyrSTAT4) is confined to the chromosomal compartment...
May 18, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28514690/genomic-characterization-of-murine-monocytes-reveals-c-ebp%C3%AE-transcription-factor-dependence-of-ly6c-cells
#2
Alexander Mildner, Jörg Schönheit, Amir Giladi, Eyal David, David Lara-Astiaso, Erika Lorenzo-Vivas, Franziska Paul, Louise Chappell-Maor, Josef Priller, Achim Leutz, Ido Amit, Steffen Jung
Monocytes are circulating, short-lived mononuclear phagocytes, which in mice and man comprise two main subpopulations. Murine Ly6C(+) monocytes display developmental plasticity and are recruited to complement tissue-resident macrophages and dendritic cells on demand. Murine vascular Ly6C(-) monocytes patrol the endothelium, act as scavengers, and support vessel wall repair. Here we characterized population and single cell transcriptomes, as well as enhancer and promoter landscapes of the murine monocyte compartment...
May 16, 2017: Immunity
https://www.readbyqxmd.com/read/28507028/rig-i-like-receptor-triggering-by-dengue-virus-drives-dendritic-cell-immune-activation-and-th1-differentiation
#3
Joris K Sprokholt, Tanja M Kaptein, John L van Hamme, Ronald J Overmars, Sonja I Gringhuis, Teunis B H Geijtenbeek
Dengue virus (DENV) causes 400 million infections annually and is one of several viruses that can cause viral hemorrhagic fever, which is characterized by uncontrolled immune activation resulting in high fever and internal bleeding. Although the underlying mechanisms are unknown, massive cytokine secretion is thought to be involved. Dendritic cells (DCs) are the main target cells of DENV, and we investigated their role in DENV-induced cytokine production and adaptive immune responses. DENV infection induced DC maturation and secretion of IL-1β, IL-6, and TNF...
May 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28504723/cx3cr1-monocytes-modulate-learning-and-learning-dependent-dendritic-spine-remodeling-via-tnf-%C3%AE
#4
Juan Mauricio Garré, Hernandez Moura Silva, Juan J Lafaille, Guang Yang
Impaired learning and cognitive function often occurs during systemic infection or inflammation. Although activation of the innate immune system has been linked to the behavioral and cognitive effects that are associated with infection, the underlying mechanisms remain poorly understood. Here we mimicked viral immune activation with poly(I:C), a synthetic analog of double-stranded RNA, and longitudinally imaged postsynaptic dendritic spines of layer V pyramidal neurons in the mouse primary motor cortex using two-photon microscopy...
May 15, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28502041/glucose-can-epigenetically-alter-the-gene-expression-of-neurotrophic-factors-in-the-murine-brain-cells
#5
Md Shamim Hossain, Yutaka Oomura, Toshihiko Katafuchi
Glucose is believed to improve the memory in both human and mice, but the detailed insights were mostly elusive. In this study, we focused on two major neurotrophic factors, brain-derived neurotrophic factor (BDNF) and fibroblast growth factor 1 (FGF1), which are believed to be associated with the memory enhancement and assessed their expressional regulation among the murine neuronal and glial cells. Our findings showed that the glucose administration increased phosphorylated Akt, phosphorylated CREB, exon 1- and exon 4-specific BDNF transcripts, and FGF1 transcripts that are associated with the epigenetic changes expected to open the chromatin and a reduction in histone deacetylase 2 (HDAC2) in neurons and astrocytes of the murine hippocampus...
May 13, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28500298/zbp1-phosphorylation-at-serine-181-regulates-its-dendritic-transport-and-the-development-of-dendritic-trees-of-hippocampal-neurons
#6
Anna S Urbanska, Aleksandra Janusz-Kaminska, Katarzyna Switon, Alicia L Hawthorne, Malgorzata Perycz, Malgorzata Urbanska, Gary J Bassell, Jacek Jaworski
Local protein synthesis occurs in axons and dendrites of neurons, enabling fast and spatially restricted responses to a dynamically changing extracellular environment. Prior to local translation, mRNA that is to be translated is packed into ribonucleoprotein particles (RNPs) where RNA binding proteins ensure mRNA silencing and provide a link to molecular motors. ZBP1 is a component of RNP transport particles and is known for its role in the local translation of β-actin mRNA. Its binding to mRNA is regulated by tyrosine 396 phosphorylation, and this particular modification was shown to be vital for axonal growth and dendritic branching...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28498840/a-third-generation-vaccine-for-human-visceral-leishmaniasis-and-post-kala-azar-dermal-leishmaniasis-first-in-human-trial-of-chad63-kh
#7
Mohamed Osman, Anoop Mistry, Ada Keding, Rhian Gabe, Elizabeth Cook, Sarah Forrester, Rebecca Wiggins, Stefania Di Marco, Stefano Colloca, Loredana Siani, Riccardo Cortese, Deborah F Smith, Toni Aebischer, Paul M Kaye, Charles J Lacey
BACKGROUND: Visceral leishmaniasis (VL or kala azar) is the most serious form of human leishmaniasis, responsible for over 20,000 deaths annually, and post kala azar dermal leishmaniasis (PKDL) is a stigmatizing skin condition that often occurs in patients after successful treatment for VL. Lack of effective or appropriately targeted cell mediated immunity, including CD8+ T cell responses, underlies the progression of VL and progression to PKDL, and can limit the therapeutic efficacy of anti-leishmanial drugs...
May 12, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28471403/pathogenesis-and-inhibition-of-flaviviruses-from-a-carbohydrate-perspective
#8
REVIEW
So Young Kim, Bing Li, Robert J Linhardt
Flaviviruses are enveloped, positive single stranded ribonucleic acid (RNA) viruses with various routes of transmission. While the type and severity of symptoms caused by pathogenic flaviviruses vary from hemorrhagic fever to fetal abnormalities, their general mechanism of host cell entry is similar. All pathogenic flaviviruses, such as dengue virus, yellow fever virus, West Nile virus, Japanese encephalitis virus, and Zika virus, bind to glycosaminglycans (GAGs) through the putative GAG binding sites within their envelope proteins to gain access to the surface of host cells...
May 4, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28465674/lncrnas-and-immunity-watchdogs-for-host-pathogen-interactions
#9
REVIEW
Peerzada Tajamul Mumtaz, Shakil Ahmad Bhat, Syed Mudasir Ahmad, Mashooq Ahmad Dar, Raashid Ahmed, Uneeb Urwat, Aadil Ayaz, Divya Shrivastava, Riaz Ahmad Shah, Nazir Ahmad Ganai
Immune responses combat various infectious agents by inducing inflammatory responses, antimicrobial pathways and adaptive immunity. The polygenic responses to these external stimuli are temporally and coordinately regulated. Specific lncRNAs are induced to modulate innate and adaptive immune responses which can function through various target interactions like RNA-DNA, RNA-RNA, and RNA-protein interaction and hence affect the immunogenic regulation at various stages of gene expression. LncRNA are found to be present in various immune cells like monocytes, macrophages, dendritic cells, neutrophils, T cells and B cells...
2017: Biological Procedures Online
https://www.readbyqxmd.com/read/28465541/transcriptional-landscape-of-epithelial-and-immune-cell-populations-revealed-through-facs-seq-of-healthy-human-skin
#10
Richard S Ahn, Keyon Taravati, Kevin Lai, Kristina M Lee, Joanne Nititham, Rashmi Gupta, David S Chang, Sarah T Arron, Michael Rosenblum, Wilson Liao
Human skin consists of multiple cell types, including epithelial, immune, and stromal cells. Transcriptomic analyses have previously been performed from bulk skin samples or from epithelial and immune cells expanded in cell culture. However, transcriptomic analysis of bulk skin tends to drown out expression signals from relatively rare cells while cell culture methods may significantly alter cellular phenotypes and gene expression profiles. To identify distinct transcriptomic profiles of multiple cell populations without substantially altering cell phenotypes, we employed a fluorescence activated cell sorting method to isolate keratinocytes, dendritic cells, CD4+ T effector cells, and CD8+ T effector cells from healthy skin samples, followed by RNA-seq of each cell population...
May 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28463240/incorrect-dosage-of-iqsec2-a-known-intellectual-disability-and-epilepsy-gene-disrupts-dendritic-spine-morphogenesis
#11
S J Hinze, M R Jackson, S Lie, L Jolly, M Field, S C Barry, R J Harvey, C Shoubridge
There is considerable genetic and phenotypic heterogeneity associated with intellectual disability (ID), specific learning disabilities, attention-deficit hyperactivity disorder, autism and epilepsy. The intelligence quotient (IQ) motif and SEC7 domain containing protein 2 gene (IQSEC2) is located on the X-chromosome and harbors mutations that contribute to non-syndromic ID with and without early-onset seizure phenotypes in both sexes. Although IQ and Sec7 domain mutations lead to partial loss of IQSEC2 enzymatic activity, the in vivo pathogenesis resulting from these mutations is not known...
May 2, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28459443/regulated-ire1-dependent-mrna-decay-sets-the-threshold-for-dendritic-cell-survival
#12
Simon J Tavernier, Fabiola Osorio, Lana Vandersarren, Jessica Vetters, Nele Vanlangenakker, Gert Van Isterdael, Karl Vergote, Riet De Rycke, Eef Parthoens, Lianne van de Laar, Takao Iwawaki, Juan R Del Valle, Chih-Chi Andrew Hu, Bart N Lambrecht, Sophie Janssens
The IRE1-XBP1 signalling pathway is part of a cellular programme that protects against endoplasmic reticulum (ER) stress, but also controls development and survival of immune cells. Loss of XBP1 in splenic type 1 conventional dendritic cells (cDC1s) results in functional alterations without affecting cell survival. However, in mucosal cDC1s, loss of XBP1 impaired survival in a tissue-specific manner-while lung cDC1s die, intestinal cDC1s survive. This was not caused by differential activation of ER stress cell-death regulators CHOP or JNK...
May 1, 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28442991/a-novel-long-non-coding-rna-durga-modulates-dendrite-density-and-expression-of-kalirin-in-zebrafish
#13
Mayuresh A Sarangdhar, Divya Chaubey, Abhishek Bhatt, Monisha Km, Manish Kumar, Shashi Ranjan, Beena Pillai
Kalirin, a key player in axonal development, nerve growth and synaptic re-modeling, is implicated in many pathological conditions like schizophrenia and autism-spectrum disorders. Alternative promoters and splicing lead to functionally distinct isoforms, but the post-transcriptional regulation of Kalirin has not been studied. Here, we report a novel non-coding RNA, which we name durga, arising from the first exon of kalirin a (kalrna) in the antisense orientation in zebrafish. The kalrna and durga transcripts are barely detectable during early development, but steadily increase by 24 hours post-fertilization (hpf) as the brain develops...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28440496/pu-1-serves-a-critical-role-in-the-innate-defense-against-aspergillus%C3%A2-fumigatus-via-dendritic-cell-associated-c-type-lectin-receptor-1-and-toll-like-receptors-2-and-4-in-thp-1-derived-macrophages
#14
Chenyang Liu, Min Wang, Wenkui Sun, Feng Cai, Shen Geng, Xin Su, Yi Shi
Aspergillus fumigatus (A. fumigatus) is one of the most common fungal pathogens of invasive pulmonary aspergillosis (IPA), which may be life threatening in immunocompromised individuals. The dendritic cell-associated C-type lectin receptor (Dectin-1), toll‑like receptor (TLR)-2 and TLR-4 are major pattern recognition receptors in alveolar macrophages that recognize A. fumigatus components. The PU.1 transcription factor is known to be important for the transcriptional control of these three receptors in mature macrophages...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28439401/long-non-coding-rna-malat1-contributes-to-cell-apoptosis-by-sponging-mir-124-in-parkinson-disease
#15
Wei Liu, Qishun Zhang, Jianlei Zhang, Wujun Pan, Jingya Zhao, Yuming Xu
BACKGROUND: Parkinson disease (PD) is the most common movement disturbance characterized by the loss of dopaminergic (DA) neurons in midbrain. Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is aberrantly expressed in neurons and is involved in the dendritic and synapse development. However, the role of MALAT1 and its underlying mechanism in PD remain to be defined. METHODS: The expressions of MALAT1 and miR-124 were evaluated by qRT-PCR. N-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced PD mice and SH-SY5Y cells subjected to N-methyl-4-phenylpyridinium (MPP(+)) were utilized to investigate the effect of MALAT1 on PD...
2017: Cell & Bioscience
https://www.readbyqxmd.com/read/28428369/single-cell-rna-seq-reveals-new-types-of-human-blood-dendritic-cells-monocytes-and-progenitors
#16
Alexandra-Chloé Villani, Rahul Satija, Gary Reynolds, Siranush Sarkizova, Karthik Shekhar, James Fletcher, Morgane Griesbeck, Andrew Butler, Shiwei Zheng, Suzan Lazo, Laura Jardine, David Dixon, Emily Stephenson, Emil Nilsson, Ida Grundberg, David McDonald, Andrew Filby, Weibo Li, Philip L De Jager, Orit Rozenblatt-Rosen, Andrew A Lane, Muzlifah Haniffa, Aviv Regev, Nir Hacohen
Dendritic cells (DCs) and monocytes play a central role in pathogen sensing, phagocytosis, and antigen presentation and consist of multiple specialized subtypes. However, their identities and interrelationships are not fully understood. Using unbiased single-cell RNA sequencing (RNA-seq) of ~2400 cells, we identified six human DCs and four monocyte subtypes in human blood. Our study reveals a new DC subset that shares properties with plasmacytoid DCs (pDCs) but potently activates T cells, thus redefining pDCs; a new subdivision within the CD1C(+) subset of DCs; the relationship between blastic plasmacytoid DC neoplasia cells and healthy DCs; and circulating progenitor of conventional DCs (cDCs)...
April 21, 2017: Science
https://www.readbyqxmd.com/read/28424693/human-melanoma-derived-extracellular-vesicles-regulate-dendritic-cell-maturation
#17
Rachel L G Maus, James W Jakub, Wendy K Nevala, Trace A Christensen, Klara Noble-Orcutt, Zohar Sachs, Tina J Hieken, Svetomir N Markovic
Evolution of melanoma from a primary tumor to widespread metastasis is crucially dependent on lymphatic spread. The mechanisms regulating the initial step in metastatic dissemination via regional lymph nodes remain largely unknown; however, evidence supporting the establishment of a pre-metastatic niche is evolving. We have previously described a dysfunctional immune profile including reduced expression of dendritic cell (DC) maturation markers in the first node draining from the primary tumor, the sentinel lymph node (SLN)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28424285/equine-arteritis-virus-has-specific-tropism-for-stromal-cells-and-cd8-t-and-cd21-b-lymphocytes-but-not-glandular-epithelium-at-the-primary-site-of-persistent-infection-in-the-stallion-reproductive-tract
#18
Mariano Carossino, Alan T Loynachan, Igor F Canisso, R Frank Cook, Juliana R Campos, Bora Nam, Yun Young Go, Edward L Squires, Mats H T Troedsson, Thomas Swerczek, Fabio Del Piero, Ernest Bailey, Peter J Timoney, Udeni B R Balasuriya
Equine arteritis virus (EAV) has a global impact on the equine industry being the causative agent of equine viral arteritis (EVA), a respiratory, systemic, and reproductive disease of equids. A distinctive feature of EAV infection is that it establishes long-term persistent infection in 10 to 70% of infected stallions (carriers). In these stallions, EAV is only detectable in the reproductive tract and viral persistence occurs despite the presence of high serum neutralizing antibodies. Carrier stallions constitute the natural reservoir of the virus as they continuously shed EAV in their semen...
April 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28421997/laser-microdissection-coupled-with-rna-seq-reveal-cell-type-and-disease-specific-markers-in-the-salivary-gland-of-sj%C3%A3-gren-s-syndrome-patients
#19
Mayank Tandon, Paola Perez, Peter D Burbelo, Catherine Calkins, Ilias Alevizos
OBJECTIVES: Little is known about the molecular details regarding the contribution of different cell types of the salivary gland to the altered gene expression profile seen in Sjögren's syndrome (SS). METHODS: Using laser microdissection, tissue samples enriched in acini, ducts and inflammatory foci in subjects with and without SS were isolated for RNA-seq analysis. Gene expression profiles were analysed and selected enriched genes were further examined using real time PCR and by immunofluorescence...
April 18, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28408410/decreased-cohesin-in-the-brain-leads-to-defective-synapse-development-and-anxiety-related-behavior
#20
Yuki Fujita, Koji Masuda, Masashige Bando, Ryuichiro Nakato, Yuki Katou, Takashi Tanaka, Masahiro Nakayama, Keizo Takao, Tsuyoshi Miyakawa, Tatsunori Tanaka, Yukio Ago, Hitoshi Hashimoto, Katsuhiko Shirahige, Toshihide Yamashita
Abnormal epigenetic regulation can cause the nervous system to develop abnormally. Here, we sought to understand the mechanism by which this occurs by investigating the protein complex cohesin, which is considered to regulate gene expression and, when defective, is associated with higher-level brain dysfunction and the developmental disorder Cornelia de Lange syndrome (CdLS). We generated conditional Smc3-knockout mice and observed greater dendritic complexity and larger numbers of immature synapses in the cerebral cortex of Smc3(+/-) mice...
May 1, 2017: Journal of Experimental Medicine
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