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Adenosine deaminase

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https://www.readbyqxmd.com/read/29781767/activities-of-purine-converting-enzymes-in-heart-liver-and-kidney-mice-ldlr-and-apo-e
#1
I M Rybakowska, B Kutryb-Zając, R Milczarek, B Łukasz, E M Slominska, R T Smolenski
Nucleotide metabolism plays a major role in a number of vital cellular processes such as energetics. This, in turn, is important in pathologies such as atherosclerosis. Three month old atherosclerotic mice with knock outs for LDLR and apolipoprotein E (ApoE) were used for the experiments. Activities of AMP-deaminase (AMPD), ecto5'-nucleotidase (e5NT), adenosine deaminase (ADA), purine nucleoside phosphorylase (PNP) were measured in heart, liver and kidney cortex and medulla by analysing conversion of substrates into products using HPLC...
May 21, 2018: Nucleosides, Nucleotides & Nucleic Acids
https://www.readbyqxmd.com/read/29779484/genetics-and-epigenetics-pathogenesis-of-beh%C3%A3-et-s-syndrome
#2
Jibran Sualeh Muhammad, Muhammad Ishaq, Khalid Ahmed
Behçet's syndrome (BS) is characterized numerous systemic manifestations, is known for its ability to affect both, arteries and the veins. However, the etiology of BS is only partially understood, and previous studies have demonstrated a role of genetic and epigenetic factors contributes to disease pathophysiology. Several studies have implicated the T cells and monocytes, especially when stimulated by seat shock proteins and streptococcal antigen. Furthermore, during disease exacerbations adenosine deaminase has an important role in lymphocyte proliferation, maturation, and differentiation, is activated in Behçet's syndrome...
May 20, 2018: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/29770436/all-i-s-on-the-radar-role-of-adar-in-gene-regulation
#3
REVIEW
Galina Shevchenko, Kevin V Morris
Adenosine to inosine (A-to-I) editing is the most abundant form of RNA modification in mammalian cells, which is catalyzed by adenosine deaminase acting on the double-stranded RNA (ADAR) protein family. A-to-I editing is currently known to be involved in the regulation of the immune system, RNA splicing, protein recoding, microRNA biogenesis, and formation of heterochromatin. Editing occurs within regions of double-stranded RNA, particularly within inverted Alu repeats, and is associated with many diseases including cancer, neurological disorders, and metabolic syndromes...
May 16, 2018: FEBS Letters
https://www.readbyqxmd.com/read/29768381/tuberculous-pleurisy-mimicking-mycoplasma-pneumoniae-infection-in-a-previously-healthy-young-adult-a-case-report
#4
Daizo Yaguchi, Motoshi Ichikawa, Masato Shizu, Noriko Inoue, Daisuke Kobayashi, Naoyuki Imai, Masao Ito
RATONALE: Sometimes, pleural effusion accompanying an acute Mycoplasma pneumoniae infection or tuberculous pleurisy has similar analysis results. We report a case of tuberculous pleurisy which was initially diagnosed as acute M pneumoniae infection, which is of special interest because anti-Mycoplasma antibody results were positive, which served as a red herring. PATIENT CONCERNS: A 20-year-old woman visited the outpatient emergency romm of our hospital for chief complaints of high fever, dry cough, and pleuralgia persiting for 2 days...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29761620/polyserositis-a-diagnostic-challenge
#5
Inés Losada, Juan González Moreno, Nuria Roda, Lola Ventayol, Yolanda Borjas, Francisco Javier Domínguez, Victoria Fernández Vaca, Mercedes García Gasalla, Antoni Payeras
Polyserositis (PS) is the inflammation, with effusion, of different serous membranes. It has been associated with different aetiologiesbut the aetiology of PS remains unknown in a high percentage of patients. The general objective of this retrospective study was to analyse the aetiology of PS cases seen at Son Llàtzer Hospital in an eleven-year period. Other objectives were to determine epidemiological, clinical, and analytical characteristics of these patients. Ninety-two patients were included in the study...
May 14, 2018: Internal Medicine Journal
https://www.readbyqxmd.com/read/29760157/methyl-cpg-binding-protein-2-mediates-antifibrotic-effects-in-scleroderma-fibroblasts
#6
Ye He, Pei-Suen Tsou, Dinesh Khanna, Amr H Sawalha
OBJECTIVE: Emerging evidence supports a role for epigenetic regulation in the pathogenesis of scleroderma (SSc). We aimed to assess the role of methyl-CpG-binding protein 2 (MeCP2), a key epigenetic regulator, in fibroblast activation and fibrosis in SSc. METHODS: Dermal fibroblasts were isolated from patients with diffuse cutaneous SSc (dcSSc) and from healthy controls. MeCP2 expression was measured by qPCR and western blot. Myofibroblast differentiation was evaluated by gel contraction assay in vitro...
May 14, 2018: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/29753815/neutropenia-among-patients-with-adenosine-deaminase-deficiency
#7
Vy Hong-Diep Kim, Anne Pham-Huy, Eyal Grunebaum
Neutropenia occurs frequently among adenosine deaminase-deficient patients, independent of infections, medications or chemotherapy, and might be among the presenting manifestations of the disease. Adenosine deaminase deficiency might directly affect myeloid development.
May 10, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29747747/tiger-nut-and-walnut-extracts-modulate-extracellular-metabolism-of-atp-and-adenosine-through-the-nos-cgmp-pkg-signalling-pathway-in-kidney-slices
#8
Ayodeji A Olabiyi, Fabiano B Carvalho, Nathieli B Bottari, Vera M Morsch, Ademir F Morel, Ganiyu Oboh, Maria Rosa Schetinger
BACKGROUND: Tiger nut (Cyperus esculentus L.) and walnut (Tetracarpidium conophorum Müll. Arg.) have been reportedly used in the treatment of inflammatory diseases such as atherosclerosis, prevent heart attack and improve blood circulation, reduce serum cholesterol level as well as inhibit oxidation reactions. PURPOSE: This study investigated the effect of tiger nut and walnut hydro-alcoholic extracts on extracellular metabolism of ATP through the NOS/cGMP/PKG signaling pathway induced by Nω-nitro-L-arginine methyl ester hydrochloride (L-NAME) in kidney slices...
April 1, 2018: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/29745882/the-adenosinergic-system-a-potential-player-in-the-pathogenesis-of-anca-associated-vasculitis
#9
REVIEW
Lovis Kling, Bernhard K Krämer, Benito A Yard, Anna-Isabelle Kälsch
Antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) is a potentially lethal autoimmune disease whose pathology comprises disturbed T cell differentiation and functionality accompanied by dysfunctional autoreactive immunoglobulin development, culminating in destructive innate immune response as well. Purines, adenine nucleotides and adenosine in particular, have been elucidated as potent extracellular mediators for fine adjustment of these pivotal processes establishing human immunity. Therefore, the extracellular purinergic microenvironment is under control of ectonucleotidases CD39 and CD73 degrading pro-inflammatory adenosine triphosphate (ATP) to anti-inflammatory adenosine as well as adenosine deaminase bound to CD26 deactivating adenosine...
May 3, 2018: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29744787/ada-deficiency-evaluation-of-the-clinical-and-laboratory-features-and-the-outcome
#10
Deniz Cagdas, Pınar Gur Cetinkaya, Betül Karaatmaca, Saliha Esenboga, Cagman Tan, Togay Yılmaz, Ersin Gümüş, Safa Barış, Barış Kuşkonmaz, Tuba Turul Ozgur, Pawan Bali, Ines Santisteban, Diclehan Orhan, Aysel Yüce, Duygu Cetinkaya, Kaan Boztug, Michael Hershfield, Ozden Sanal, İlhan Tezcan
INTRODUCTION: Adenosine deaminase (ADA) deficiency is an autosomal recessive primary immunodeficiency. It results in the intracellular accumulation of toxic metabolites which have effects particularly on lymphocytes and the brain. The aim of this study was to evaluate the outcome of 13 ADA-deficient patients. We planned to evaluate their clinical and laboratory findings before and after enzyme replacement therapy (ERT), allogeneic hematopoietic stem cell transplantation (aHSCT), and hematopoietic stem cell gene therapy (HSCGT)...
May 9, 2018: Journal of Clinical Immunology
https://www.readbyqxmd.com/read/29743394/-cerebrospinal-fluid-findings-in-chronic-active-epstein-barr-virus-infection-with-central-nervous-system-involvement
#11
Mayumi Yoshimori, Ken-Ichi Imadome, Shohei Tomii, Kouhei Yamamoto, Osamu Miura, Ayako Arai
As chronic active Epstein-Barr virus (EBV) infection (CAEBV) progresses, EBV-infected tumor cells invade the central nervous system (CNS). To establish a diagnostic procedure for CNS invasion, we retrospectively analyzed cerebrospinal fluid (CSF) obtained from eight patients. Two patients presented with consciousness disturbance and were diagnosed with CNS invasion based on scan and autopsy results, respectively. The remaining six patients were diagnosed without CNS invasion by clinical findings and scans. In the two patients with CNS invasion, the number of mononuclear cells and the protein concentration were increased, whereas the CSF to serum glucose ratio and the adenosine deaminase concentration were raised...
2018: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/29736678/-juvenile-familial-vertebrobasilar-brain-infarctions-due-to-adenosine-deaminase-2-deficiency
#12
T Etgen, T Kiefer, M Luther, R Haberl
No abstract text is available yet for this article.
May 7, 2018: Der Nervenarzt
https://www.readbyqxmd.com/read/29733375/tissue-selective-restriction-of-rna-editing-of-cav1-3-by-splicing-factor-srsf9
#13
Hua Huang, Katannya Kapeli, Wenhao Jin, Yuk Peng Wong, Thiruma Valavan Arumugam, Joanne Huifen Koh, Sumitra Srimasorn, Karthik Mallilankaraman, John Jia En Chua, Gene W Yeo, Tuck Wah Soong
Adenosine DeAminases acting on RNA (ADAR) catalyzes adenosine-to-inosine (A-to-I) conversion within RNA duplex structures. While A-to-I editing is often dynamically regulated in a spatial-temporal manner, the mechanisms underlying its tissue-selective restriction remain elusive. We have previously reported that transcripts of voltage-gated calcium channel CaV1.3 are subject to brain-selective A-to-I RNA editing by ADAR2. Here, we show that editing of CaV1.3 mRNA is dependent on a 40 bp RNA duplex formed between exon 41 and an evolutionarily conserved editing site complementary sequence (ECS) located within the preceding intron...
May 4, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29732155/misdiagnosis-of-primary-pleural-dlbcl-as-tuberculosis-a-case-report-and-literature-review
#14
Xinmei Yang, Xiaofang Xu, Binbin Song, Qiang Zhou, Ying Zheng
Diffuse large B-cell lymphoma (DLBCL) is the most common type of non-Hodgkin lymphoma (NHL). DLBCL presents with pleural involvement at an advanced stage; however, primary pleural lymphomas without any other site of involvement are rare, and the possibility of misdiagnosis is high, particularly in developing countries, where tuberculosis or other severe pulmonary infections remain a major health concern. Furthermore, lymphoma and tuberculosis share a number of common clinical characteristics, such as fever, night sweats, feeling of satiety after a small meal, fatigue and unexplained weight loss, among others...
June 2018: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/29714445/pooled-analysis-of-163-published-tuberculous-peritonitis-cases-from-turkey
#15
Bedia Mutay Suntur, Ferit Kuşçu
Background/aim: Tuberculous peritonitis may be difficult to diagnose due to its insidious and variable clinical manifestations as well as characteristics similar to malignancy. In this study, case reports from Turkey over the last 10 years were reviewed systematically using pooled analysis. Materials and methods: Thirty-four suitable articles were found and 163 tuberculous peritonitis cases were included in the study. Results: The mean age was 34.1 years (17–79 years), and 146 (98.6%) of the patients were female and 17 (10...
April 30, 2018: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29705393/diagnostic-scoring-system-for-tuberculous-meningitis-among-adult-patients-with-non-suppurative-and-non-bacterial-meningitis
#16
Sarunyou Chusri, Thanaporn Hortiwakul, Natthaka Sathaporn, Boonsri Charernmak, Manthana Phengmak, Walailuk Jitpiboon, Alan Frederick Geater
Tuberculous meningitis (TBM) is the most severe form of extra-pulmonary tuberculosis. The definite diagnosis of this disease is difficult and can result in delayed treatment. Conventional culture yields low sensitivity while high-sensitivity diagnostic techniques are costly and unpractical. Adenosine deaminase (ADA) is used to diagnose several settings of extra-pulmonary tuberculosis but it is limited in TBM especially among HIV-infected patients. We retrospectively reviewed the data of patients with non-suppurative meningitis and compared the patient data with TBM and other causes including carcinomatous, lymphomatous, lymphocytic and fungal meningitis...
April 25, 2018: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29702691/extracellular-adenosine-modulates-host-pathogen-interactions-through-regulation-of-systemic-metabolism-during-immune-response-in-drosophila
#17
Adam Bajgar, Tomas Dolezal
Phagocytosis by hemocytes, Drosophila macrophages, is essential for resistance to Streptococcus pneumoniae in adult flies. Activated macrophages require an increased supply of energy and we show here that a systemic metabolic switch, involving the release of glucose from glycogen, is required for effective resistance to S. pneumoniae. This metabolic switch is mediated by extracellular adenosine, as evidenced by the fact that blocking adenosine signaling in the adoR mutant suppresses the systemic metabolic switch and decreases resistance to infection, while enhancing adenosine effects by lowering adenosine deaminase ADGF-A increases resistance to S...
April 27, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29694248/adar1-attenuates-allogeneic-graft-rejection-by-suppressing-mir-21-biogenesis-in-macrophages-and-promoting-m2-polarization
#18
Junjie Li, Jiangang Xie, Shanshou Liu, Xiao Li, Dongliang Zhang, Xianqi Wang, Jinquan Jiang, Wei Hu, Yuan Zhang, Boquan Jin, Ran Zhuang, Wen Yin
ADAR1 (adenosine deaminase acting on double-stranded RNA 1) is an RNA-editing enzyme that mediates adenosine-to-inosine RNA editing events, an important post-transcriptional modification mechanism that can alter the coding properties of mRNA or regulate microRNA biogenesis. ADAR1 also regulates the innate immune response. Here, we have demonstrated that ADAR1 expression increased in LPS-stimulated macrophages. Silencing ADAR1 by using small interfering RNA in macrophages resulted in the pronounced polarization of macrophages to M1, whereas ADAR1 overexpression promoted M2 polarization, which indicated that ADAR1 can inhibit macrophage hyperpolarization and prevent immune hyperactivity...
April 25, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29692414/a-to-i-rna-editing-immune-protector-and-transcriptome-diversifier
#19
REVIEW
Eli Eisenberg, Erez Y Levanon
Modifications of RNA affect its function and stability. RNA editing is unique among these modifications because it not only alters the cellular fate of RNA molecules but also alters their sequence relative to the genome. The most common type of RNA editing is A-to-I editing by double-stranded RNA-specific adenosine deaminase (ADAR) enzymes. Recent transcriptomic studies have identified a number of 'recoding' sites at which A-to-I editing results in non-synonymous substitutions in protein-coding sequences. Many of these recoding sites are conserved within (but not usually across) lineages, are under positive selection and have functional and evolutionary importance...
April 24, 2018: Nature Reviews. Genetics
https://www.readbyqxmd.com/read/29691780/combinatory-rna-sequencing-analyses-reveal-a-dual-mode-of-gene-regulation-by-adar1-in-gastric-cancer
#20
Charles J Cho, Jaeeun Jung, Lushang Jiang, Eun Ji Lee, Dae-Soo Kim, Byung Sik Kim, Hee Sung Kim, Hwoon-Yong Jung, Ho-June Song, Sung Wook Hwang, Yangsoon Park, Min Kyo Jung, Chan Gi Pack, Seung-Jae Myung, Suhwan Chang
BACKGROUND: Adenosine deaminase acting on RNA 1 (ADAR1) is known to mediate deamination of adenosine-to-inosine through binding to double-stranded RNA, the phenomenon known as RNA editing. Currently, the function of ADAR1 in gastric cancer is unclear. AIMS: This study was aimed at investigating RNA editing-dependent and editing-independent functions of ADAR1 in gastric cancer, especially focusing on its influence on editing of 3' untranslated regions (UTRs) and subsequent changes in expression of messenger RNAs (mRNAs) as well as microRNAs (miRNAs)...
April 25, 2018: Digestive Diseases and Sciences
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