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Cecilia Becattini, Francesco Dentali, Giuseppe Camporese, Agnese Sembolini, Elena Rancan, Chiara Tonello, Giorgia Manina, Seena Padayattil, Giancarlo Agnelli
BACKGROUND AND AIMS: Whether carotid atherosclerosis is associated with an increased risk for ischemic stroke in patients with atrial fibrillation (AF) on anticoagulant treatment is undefined. To explore this association, patients with AF on treatment with vitamin K antagonists were included in a multicenter, prospective study. METHODS: At inclusion in the study, patients underwent Doppler-ultrasonography for the assessment of carotid atherosclerosis and then were prospectively followed...
March 2, 2018: Atherosclerosis
Hyosun Tak, Hoin Kang, Eunbyul Ji, Youlim Hong, Wook Kim, Eun Kyung Lee
Precise and early diagnosis is critical to improve the survival rate of hepatocellular carcinoma (HCC) patients. Although several genetic and protein markers have been developed and are currently used for diagnosis, prognosis, risk stratification, and therapeutic monitoring, application of these markers still needs to be improved for better specificity and efficacy. In this study, we investigated the relative expression of mitochondrial dynamics-regulating factors including T-cell intercellular antigen protein-1 (TIA-1), mitochondrial fission factor (MFF), microRNA (miR)-200a-3p, and miR-27a/b in the liver tissues from HCC patients...
February 26, 2018: Biochemical and Biophysical Research Communications
Yu Uemura, Yasushi Isobe, Akiko Uchida, Junko Asano, Yuji Nishio, Hirotaka Sakai, Masahiro Hoshikawa, Masayuki Takagi, Naoya Nakamura, Ikuo Miura
Peripheral T- or NK-cell lymphomas are rare and difficult-to-recognize diseases. It remains arduous to distinguish between NK cell- and cytotoxic T lymphocyte-derived lymphomas through routine histologic evaluation. To clarify the cells of origin, we focused on NK-cell receptors and examined the expression using immunohistochemistry in 22 cases with T- and NK-cell neoplasms comprising of angioimmunoblastic T-cell lymphoma, ALK-positive and -negative anaplastic large cell lymphomas, extranodal NK/T-cell lymphoma, nasal type, monomorphic epitheliotropic intestinal T-cell lymphoma, aggressive NK-cell leukemia, and other peripheral T-cell lymphomas...
January 24, 2018: Cancer Science
Emanuela Palmerini, Claudio Agostinelli, Piero Picci, Stefano Pileri, Teresa Marafioti, Pier-Luigi Lollini, Katia Scotlandi, Alessandra Longhi, Maria Serena Benassi, Stefano Ferrari
Background: We hypothesized that immune-infiltrates were associated with superior survival, and examined a primary osteosarcoma tissue microarrays (TMAs) to test this hypothesis. Methods: 129 patients (pts) with localized osteosarcoma treated within protocol ISG-OS1 were included in the study. Clinical characteristics, expression of CD8, CD3, FOXP3, CD20, CD68/CD163 (tumor associated macrophage, TAM), Tia-1 (cytotoxic T cell), CD303 (plasmacytoid dendritic cells: pDC), Arginase-1 (myeloid derived suppressor cells: MDSC), PD-1 on immune-cells (IC), and PD-L1 on tumoral cells (TC) and IC were analysed and correlated with outcome...
December 19, 2017: Oncotarget
Yifan Gong, James A Hewett
Activity of neuronal cyclooxygenase-2 (COX-2), a primary source of PG synthesis in the normal brain, is enhanced by excitatory neurotransmission and this is thought to be involved in seizure suppression. Results herein showing that the incidence of pentylenetetrazole (PTZ)-induced convulsions is suppressed in transgenic mice overexpressing COX-2 in neurons supports this notion. T-cell intracellular antigen-1 (TIA-1) is an mRNA binding protein that is known to bind to COX-2 mRNA and repress its translation in non-neuronal cell types...
January 11, 2018: Neuroscience
Joseph B Rayman, Kevin A Karl, Eric R Kandel
Stress granules are non-membranous structures that transiently form in the cytoplasm during cellular stress, where they promote translational repression of non-essential RNAs and modulate cell signaling by sequestering key signal transduction proteins. These and other functions of stress granules facilitate an adaptive cellular response to environmental adversity. A key component of stress granules is the prion-related RNA-binding protein, T cell intracellular antigen-1 (TIA-1). Here, we report that recombinant TIA-1 undergoes rapid multimerization and phase separation in the presence of divalent zinc, which can be reversed by the zinc chelator, TPEN...
January 2, 2018: Cell Reports
Juan Zhang, MaoJuan Wang, XiaoDong Yang, Chang Liu, Xin He
RATIONALE: Primary pulmonary NK/T cell lymphoma is extremely rare, and only a few cases have reported so far. Its diagnosis is mainly dependent on open-lung biopsy. PATIENT CONCERNS: Here, we report a 44-year-old male who was initially misdiagnosed as having pneumonia according to the clinical characteristics and computed tomography (CT) findings. DIAGNOSIS: The first lung biopsy indicated a large number of coagulative necrotic lesions, and definite diagnosis was made after the second lung biopsy following non-response to 6-day wide spectrum antibiotic therapy...
December 2017: Medicine (Baltimore)
Sofía M García-Mauriño, Francisco Rivero-Rodríguez, Alejandro Velázquez-Cruz, Marian Hernández-Vellisca, Antonio Díaz-Quintana, Miguel A De la Rosa, Irene Díaz-Moreno
mRNA metabolism is tightly orchestrated by highly-regulated RNA Binding Proteins (RBPs) that determine mRNA fate, thereby influencing multiple cellular functions across biological contexts. Here, we review the interplay between six well-known RBPs (TTP, AUF-1, KSRP, HuR, TIA-1, and TIAR) that recognize AU-rich elements (AREs) at the 3' untranslated regions of mRNAs, namely ARE-RBPs. Examples of the links between their cross-regulations and modulation of their targets are analyzed during mRNA processing, turnover, localization, and translational control...
2017: Frontiers in Molecular Biosciences
Nishi R Sharma, Vladimir Majerciak, Michael J Kruhlak, Zhi-Ming Zheng
TIA-1 positive stress granules (SG) represent the storage sites of stalled mRNAs and are often associated with the cellular antiviral response. In this report, we provide evidence that Kaposi's sarcoma-associated herpesvirus (KSHV) overcomes the host antiviral response by inhibition of SG formation via a viral lytic protein ORF57. By immunofluorescence analysis, we found that B lymphocytes with KSHV lytic infection are refractory to SG induction. KSHV ORF57, an essential post-transcriptional regulator of viral gene expression and the production of new viral progeny, inhibits SG formation induced experimentally by arsenite and poly I:C, but not by heat stress...
October 2017: PLoS Pathogens
Yasuo Sugita, Takuya Furuta, Koichi Ohshima, Satoru Komaki, Junko Miyoshi, Motohiro Morioka, Hideyuki Abe, Takanori Nozawa, Yukihiko Fujii, Hitoshi Takahashi, Akiyoshi Kakita
It has been shown that high expression of certain immune checkpoint molecules, including those of the programmed death protein 1/programmed death ligand 1 (PD-1/PD-L1) axis, can be utilized to regulate immunosuppression in the microenvironment of malignant neoplasms. For the purpose of clarifying the immune-escape mechanism of primary central nervous system lymphomas (PCNSLs), particularly in Epstein-Barr virus (EBV)-positive cases, markers for PD-1, PD-L1, tumor-associated macrophages (TAMs), and tumor-infiltrating lymphocytes (TILs) in 39 surgical specimens of PCNSLs (17 EBV-positive, 22 EBV-negative) were investigated by immunohistochemistry...
October 24, 2017: Neuropathology: Official Journal of the Japanese Society of Neuropathology
Dujuan Li, Fangfang Fu, Lifei Lian
We report a unique case of primary CNS extranodal natural killer/T-cell lymphoma (PCNS ENKTCL) with CD20 expression and the monoclonal rearrangement of Ig heavey chain (IgH) gene. Resection specimens were evaluated using HE-stained sections, immunohistochemistry, in situ hybridization and PCR. Histopathologic examination, immunohistochemistry and molecular studies showed the intermediate-sized lymphoma cells expressing CD2, CD3ε, granzyme B, TIA-1, CD20 and Epstein-Barr virus-encoded RNA, with germline T-cell receptor gene and the monoclonal rearrangement of IgH gene...
October 24, 2017: Neuropathology: Official Journal of the Japanese Society of Neuropathology
Sung-Min Cho, Abhishek Deshpande, Vinay Pasupuleti, Adrian V Hernandez, Ken Uchino
OBJECTIVE: In a systematic review, we compared ratio of new periprocedural radiographic brain ischemia (RBI) to the number of strokes and TIAs among patients undergoing carotid endarterectomy (CEA) and carotid artery stenting (CAS). METHODS: We searched 5 databases for entries related to brain ischemia in CEA or CAS from inception through September 2015. We included articles with CEA or CAS and systematic performance of preprocedural and postprocedural brain MRI and reporting of RBI and stroke incidence...
November 7, 2017: Neurology
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...
November 2017: Journal of Cardiovascular Electrophysiology
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 2013-2014. 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...
November 2017: Journal of Cardiovascular Electrophysiology
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
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
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
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
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)
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
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