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https://www.readbyqxmd.com/read/28845890/long-term-aspirin-does-not-lower-risk-of-stroke-and-increases-bleeding-risk-in-low-risk-atrial-fibrillation-ablation-patients
#1
Victoria Jacobs, Heidi T May, Tami L Bair, Brian G Crandall, Michael J Cutler DO, John D Day, Charles Mallender, Jeffrey S Osborn, J Peter Weiss, T Jared Bunch
BACKGROUND: Stroke risk is a significant concern in patients with atrial fibrillation (AF). Low stroke risk patients (CHADS2 VASc 0-2) are often treated long-term with aspirin after catheter ablation. Defining the long-term risks versus benefits of aspirin therapy, after an ablation, is essential to validate this common clinical approach. METHODS: A total of 4,124 AF ablation patients undergoing their index ablation were included in this retrospective observational study...
August 28, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28800179/short-term-outcomes-of-atrial-flutter-ablation
#2
Byomesh Tripathi, Shilpkumar Arora, Abhishek Mishra, Vishwa Reddy Kundoor, Sopan Lahewala, Varun Kumar, Mahek Shah, Dhairya Lakhani, Harshil Shah, Nilay V Patel, Nileshkumar J Patel, Mihir Dave, Abhishek Deshmukh, Sattur Sudhakar, Radha Gopalan
BACKGROUND: Understanding the factors associated with early readmissions following atrial flutter (AFL) ablation is critical to reduce the cost and improving the quality of life in AFL patients. METHOD: The study cohort was derived from the National readmission database 2013-14. International Classification of Diseases, 9th Revision (ICD-9-CM) diagnosis code 427.32 and procedure code 37.34 were used to identify AFL and catheter ablation respectively. The primary and secondary outcomes were 90-day readmission and complications including in-hospital mortality...
August 11, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28693298/chicken-rna-binding-protein-tia-1-contributes-to-stress-granule-formation-in-chicken-cells-and-tissues
#3
Yingjie Sun, Pin Zhang, Hang Zheng, Luna Dong, Lei Tan, Cuiping Song, Xusheng Qiu, Ying Liao, Chunchun Meng, Shengqing Yu, Chan Ding
T-cell internal antigen-1 (TIA-1) plays roles in regulating alternative pre-mRNA splicing, mRNA translation, and stress granule (SG) formation in human cells. As an evolutionarily conserved response to environmental stress, SG has been reported to exist in various species. However, SG formation in chicken cells and the role of chicken TIA-1 (cTIA-1) in SG assembly has not been elucidated. In the present study, we cloned cTIA-1 and showed that cTIA-1 facilitates in the assembly of canonical SGs in both human and chicken cells...
July 10, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/28636238/segmental-domain-selective-perdeuteration-and-small-angle-neutron-scattering-for-structural-analysis-of-multi-domain-proteins
#4
Miriam Sonntag, Pravin Kumar Ankush Jagtap, Bernd Simon, Marie-Sousai Appavou, Arie Geerlof, Ralf Stehle, Frank Gabel, Janosch Hennig, Michael Sattler
Multi-domain proteins play critical roles in fine-tuning essential processes in cellular signaling and gene regulation. Typically, multiple globular domains that are connected by flexible linkers undergo dynamic rearrangements upon binding to protein, DNA or RNA ligands. RNA binding proteins (RBPs) represent an important class of multi-domain proteins, which regulate gene expression by recognizing linear or structured RNA sequence motifs. Here, we employ segmental perdeuteration of the three RNA recognition motif (RRM) domains in the RBP TIA-1 using Sortase A mediated protein ligation...
August 1, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28592527/zika-virus-hijacks-stress-granule-proteins-and-modulates-the-host-stress-response
#5
Shangmei Hou, Anil Kumar, Zaikun Xu, Adriana M Airo, Iryna Stryapunina, Cheung Pang Wong, William Branton, Egor Tchesnokov, Matthias Götte, Christopher Power, Tom C Hobman
Zika virus (ZIKV), a member of the Flaviviridae family, has recently emerged as an important human pathogen with increasing economic and health impact worldwide. Because of its teratogenic nature and association with the serious neurological condition Guillain-Barré syndrome, a tremendous amount of effort has focused on understanding ZIKV pathogenesis. To gain further insights into ZIKV interaction with host cells, we investigated how this pathogen affects stress response pathways. While ZIKV infection induces stress signaling that leads to phosphorylation of eIF2α and cellular translational arrest, stress granule (SG) formation was inhibited...
June 7, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28495450/rho-guanine-nucleotide-exchange-factor-rgnef-is-a-prosurvival-factor-under-stress-conditions
#6
Kevin Cheung, Cristian A Droppelmann, Adam MacLellan, Ian Cameron, Benjamin Withers, Danae Campos-Melo, Kathryn Volkening, Michael J Strong
Rho guanine nucleotide exchange factor (RGNEF) is a 190kDa RNA binding protein (RBP) that also contains a Dbl/PH domain capable of RhoA activation. Consistent with a key role in the pathogenesis of amyotrophic lateral sclerosis (ALS), RGNEF forms pathological neuronal cytoplasmic inclusions in degenerating spinal motor neurons. To further understand the role of RGNEF in the stress response, we first observed that the expression of RGNEF is upregulated in murine spinal motor neurons following distal sciatic nerve injury...
May 8, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28383438/safety-and-efficacy-of-cardi-o-fix-occluder-for-percutaneous-closure-of-a-patent-foramen-ovale-a-single-center-prospective-study
#7
Enfa Zhao, Wenjuan Liu, Yushun Zhang, Gesheng Cheng, Yajuan Du, Lu He, Xingye Wang, Xumei He
BACKGROUND: Amplatzer occluder and Cardio-O-fix occluder are currently used in percutaneous closure of patent foramen ovale. However, there is still a lack of relevant reports comparison the differences between them. The aim of this study was to evaluate the short-term and mid-term safety and efficacy of the Cardi-O-fix occluder in preventing recurrent cerebrovascular events in patients with a patent foramen ovale (PFO). METHODS: We enrolled 246 patients (105 men) with a PFO from May 30, 2013 to March 30, 2015 in this single-center prospective study...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28298474/tumor-protein-d52-expression-is-post-transcriptionally-regulated-by-t-cell-intercellular-antigen-tia-1-and-tia-related-protein-via-mrna-stability
#8
COMPARATIVE STUDY
Hiromi Motohashi, Yoshiki Mukudai, Chihiro Ito, Kosuke Kato, Toshikazu Shimane, Seiji Kondo, Tatsuo Shirota
Although tumor protein D52 (TPD52) family proteins were first identified nearly 20 years ago, their molecular regulatory mechanisms remain unclear. Therefore, we investigated the post-transcriptional regulation of TPD52 family genes. An RNA immunoprecipitation (RIP) assay showed the potential binding ability of TPD52 family mRNAs to several RNA-binding proteins, and an RNA degradation assay revealed that TPD52 is subject to more prominent post-transcriptional regulation than are TPD53 and TPD54. We subsequently focused on the 3'-untranslated region (3'-UTR) of TPD52 as a cis-acting element in post-transcriptional gene regulation...
May 4, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28221306/whole-exome-sequencing-identifies-atypical-welander-distal-myopathy-in-patient
#9
Jennifer Gass, Patrick Blackburn, Jessica Jackson, Kimberly Harris, Duygu Selcen, Elliot Dimberg, Paldeep Atwal
Welander distal myopathy is a rare autosomal dominant disorder characterized by muscle weakness in the hands and feet. Exome sequencing of affected families discovered a segregating p.Glu384Lys pathogenic variant in TIA-1 as the main genetic cause of Welander distal myopathy. TIA-1 encodes an RNA-binding protein which serves as a key component of stress granules. This protein also regulates splicing and translation of mRNA. Our patient developed progressive weakness in his hands and feet during his late 40s that was misdiagnosed as a neuropathy that caused muscle atrophy...
March 2017: Journal of Clinical Neuromuscular Disease
https://www.readbyqxmd.com/read/28193996/a-case-report-of-primary-nasal-natural-killer-nk-t-cell-lymphoma-in-an-african-american-patient-presenting-with-hemophagocytic-syndrome
#10
Bowei Tan, Cherif Abdelmalek, James E O'Donnell, Thomas Toltaku, Rashid Chaudhry, Jen C Wang, Vladimir Gotlieb
BACKGROUND Extranodal natural killer/T-cell lymphoma, nasal type (ENKTCL) is generally an aggressive and rare non-Hodgkin lymphoma. It is most common in East Asians, Native Americans, and South Americans, but is rarely reported in blacks. CASE REPORT A 55-year-old African American male born in Grenada presented with a left nostril mass with facial swelling and biopsy subsequently confirmed a diagnosis of extranodal NK/T-cell lymphoma, nasal type (ENKTCL). Immunochemistry was positive for CD2, cytoplasmic CD3, CD7, CD 43, CD 56, granzyme B, and TIA-1...
February 14, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28191697/composite-lymphoma-of-peripheral-t-cell-lymphoma-and-hodgkin-lymphoma-mixed-cellularity-type-pathological-and-molecular-analysis
#11
Ayako Ichikawa, Hiroaki Miyoshi, Takuji Yamauchi, Fumiko Arakawa, Riko Kawano, Hiroko Muta, Yasuo Sugita, Koichi Akashi, Koichi Ohshima
Composite lymphomas (CLs) are defined as two unrelated lymphomas occurring at the same time within the same tissue. The incidence of these tumors is low. Of all possible combinations between lymphomas, the least frequent are the ones combining peripheral T-cell lymphoma (PTCL) and Hodgkin lymphoma (HL). We recently identified five cases of CL composed of PTCL and classical HL, mixed cellularity type. We investigated histological and clinical features of these cases. Immunostaining was performed on paraffin sections...
April 2017: Pathology International
https://www.readbyqxmd.com/read/28184449/tia-1-rrm23-binding-and-recognition-of-target-oligonucleotides
#12
Saboora Waris, Sofía M García-Mauriño, Andrew Sivakumaran, Simone A Beckham, Fionna E Loughlin, Myriam Gorospe, Irene Díaz-Moreno, Matthew C J Wilce, Jacqueline A Wilce
TIA-1 (T-cell restricted intracellular antigen-1) is an RNA-binding protein involved in splicing and translational repression. It mainly interacts with RNA via its second and third RNA recognition motifs (RRMs), with specificity for U-rich sequences directed by RRM2. It has recently been shown that RRM3 also contributes to binding, with preferential binding for C-rich sequences. Here we designed UC-rich and CU-rich 10-nt sequences for engagement of both RRM2 and RRM3 and demonstrated that the TIA-1 RRM23 construct preferentially binds the UC-rich RNA ligand (5΄-UUUUUACUCC-3΄)...
May 5, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28049644/functional-prions-in-the-brain
#13
REVIEW
Joseph B Rayman, Eric R Kandel
Prions are proteins that can adopt self-perpetuating conformations and are traditionally regarded as etiological agents of infectious neurodegenerative diseases in humans, such as Creutzfeldt-Jakob disease, kuru, and transmissible encephalopathies. More recently, a growing consensus has emerged that prion-like, self-templating mechanisms also underlie a variety of neurodegenerative disorders, including amyotrophic lateral sclerosis, Alzheimer's disease, and Huntington's disease. Perhaps most surprising, not all prion-like aggregates are associated with pathological changes...
January 3, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28011649/newcastle-disease-virus-induces-stable-formation-of-bona-fide-stress-granules-to-facilitate-viral-replication-through-manipulating-host-protein-translation
#14
Yingjie Sun, Luna Dong, Shengqing Yu, Xiaoxu Wang, Hang Zheng, Pin Zhang, Chunchun Meng, Yuan Zhan, Lei Tan, Cuiping Song, Xusheng Qiu, Guijun Wang, Ying Liao, Chan Ding
Mammalian cells respond to various environmental stressors to form stress granules (SGs) by arresting cytoplasmic mRNA, protein translation element, and RNA binding proteins. Virus-induced SGs function in different ways, depending on the species of virus; however, the mechanism of SG regulation of virus replication is not well understood. In this study, Newcastle disease virus (NDV) triggered stable formation of bona fide SGs on HeLa cells through activating the protein kinase R (PKR)/eIF2α pathway. NDV-induced SGs contained classic SG markers T-cell internal antigen (TIA)-1, Ras GTPase-activating protein-binding protein (G3BP)-1, eukaryotic initiation factors, and small ribosomal subunit, which could be disassembled in the presence of cycloheximide...
April 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28003185/tia-1-is-a-functional-prion-like-protein
#15
Joseph B Rayman, Eric R Kandel
Prions are self-propagating protein conformations that are traditionally regarded as agents of neurodegenerative disease in animals. However, it has become evident that prion-like aggregation of endogenous proteins can also occur under normal physiological conditions (e.g., during memory storage or activation of the immune response). In this review, we focus on the functional prion-related protein TIA-1, an RNA-binding protein that is involved in multiple aspects of RNA metabolism but is best understood in terms of its role in stress granule assembly during the cellular stress response...
December 21, 2016: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/27965113/dissecting-the-molecular-mechanisms-that-impair-stress-granule-formation-in-aging-cells
#16
Ossama Moujaber, Hicham Mahboubi, Mohamed Kodiha, Manuella Bouttier, Klaudia Bednarz, Ragini Bakshi, John White, Louise Larose, Inés Colmegna, Ursula Stochaj
Aging affects numerous aspects of cell biology, but the senescence-associated changes in the stress response are only beginning to emerge. To obtain mechanistic insights into these events, we examined the formation of canonical and non-canonical stress granules (SGs) in the cytoplasm. SG generation is a key event after exposure to physiological or environmental stressors. It requires the SG-nucleating proteins G3BP1 and TIA-1/TIAR and stress-related signaling events. To analyze SG formation, we used two independent models of somatic cell aging...
March 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27900092/primary-orbital-precursor-t-cell-lymphoblastic-lymphoma-report-of-a-unique-case
#17
Lisa Stenman, Marta Persson, Fredrik Enlund, Erik Clasen-Linde, Göran Stenman, Steffen Heegaard
Primary T-cell lymphoblastic lymphoma (T-LBL) in the eye region is very rare. The present study described a unique case of T-LBL involving the extraocular muscles. A 22-year-old male patient presented with a 3-week history of headache, reduced visual acuity and edema of the left eye. Clinical examination revealed left-sided exophthalmus, periorbital edema, chemosis, and reduced motility of the left eye. A magnetic resonance imaging scan revealed thickening of the left orbital muscles and a positron emission tomography-computed tomography scan also demonstrated activity in a subclavicular lymph node...
November 2016: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/27881629/risk-of-fractures-after-stroke-results-from-the-ontario-stroke-registry
#18
MULTICENTER STUDY
Moira K Kapral, Jiming Fang, Shabbir M H Alibhai, Peter Cram, Angela M Cheung, Leanne K Casaubon, Marla Prager, Melissa Stamplecoski, Brennan Rashkovan, Peter C Austin
OBJECTIVE: To determine the risk of fractures after stroke. METHODS: Using the Ontario Stroke Registry, we identified a population-based sample of consecutive patients seen in the emergency department or hospitalized with stroke (n = 23,751) or TIA (n = 11,240) at any of 11 stroke centers in Ontario, Canada, and discharged alive between July 1, 2003, and March 31, 2012. We compared the risk of low-trauma fractures in patients with stroke vs those with TIA using propensity score methods to adjust for differences in baseline factors...
January 3, 2017: Neurology
https://www.readbyqxmd.com/read/27879514/primary-cutaneous-t-cell-lymphomas-showing-gamma-delta-%C3%AE-%C3%AE-phenotype-and-predominantly-epidermotropic-pattern-are-clinicopathologically-distinct-from-classic-primary-cutaneous-%C3%AE-%C3%AE-t-cell-lymphomas
#19
E Dean Merrill, Rose Agbay, Roberto N Miranda, Phyu P Aung, Michael T Tetzlaff, Ken H Young, Jonathan L Curry, Priyadharsini Nagarajan, Doina Ivan, Victor G Prieto, L Jeffrey Medeiros, Madeleine Duvic, Carlos A Torres-Cabala
Primary cutaneous gamma-delta (γδ) T-cell lymphoma is a rare disease that typically involves the dermis and subcutis. Cases of primary cutaneous T-cell lymphomas showing γδ phenotype and predominantly epidermotropic pattern (EγδTCL) are not well defined. In this series, cases of primary cutaneous T-cell lymphomas showing γδ phenotype were reviewed and classified as predominantly epidermotropic (EγδTCL) when >75% of lymphoma cells resided in the epidermis or predominantly dermal and/or subcutaneous (DSγδTCL)...
February 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/27836976/stress-granule-induction-after-brain-ischemia-is-independent-of-eukaryotic-translation-initiation-factor-eif-2%C3%AE-phosphorylation-and-is-correlated-with-a-decrease-in-eif4b-and-eif4e-proteins
#20
María I Ayuso, Emma Martínez-Alonso, Ignacio Regidor, Alberto Alcázar
Stress granules (SGs) are cytoplasmic ribonucleoprotein aggregates that are directly connected with the translation initiation arrest response to cellular stresses. Translation inhibition (TI) is observed in transient brain ischemia, a condition that induces persistent TI even after reperfusion, i.e. when blood flow is restored, and causes delayed neuronal death (DND) in selective vulnerable regions. We previously described a connection between TI and DND in the hippocampal cornu ammonis 1 (CA1) in an animal model of transient brain ischemia...
December 30, 2016: Journal of Biological Chemistry
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