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Serum citrulline

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https://www.readbyqxmd.com/read/28215033/anti-mutated-citrullinated-vimentin-antibodies-in-antiphospholipid-syndrome-diagnostic-value-and-relationship-with-clinical-features
#1
Cristiano Alessandri, Nancy Agmon-Levin, Fabrizio Conti, Carlo Perricone, Elena Ortona, Monica Pendolino, Antonella Capozzi, Federica Delunardo, Riccardo Mancini, Simona Truglia, Francesca Romana Spinelli, Fulvia Ceccarelli, Maurizio Sorice, Yehuda Shoenfeld, Guido Valesini
: Antiphospholipid antibodies (aPLs) are a heterogeneous group of autoantibodies essential for the diagnosis of antiphospholipid syndrome (APS) but do not predict clinical manifestations or disease progression. Hence, the co-presence of other antibodies may prove useful. Autoimmunity directed toward vimentin and other citrullinated peptides was established in rheumatoid arthritis (RA) and in other autoimmune conditions including systemic lupus erythematosus (SLE). We have previously described the presence of autoantibodies directed against vimentin/cardiolipin complex in patients with antiphospholipid syndrome (APS), but there are no data on the role of citrullinated vimentin in APS...
February 18, 2017: Immunologic Research
https://www.readbyqxmd.com/read/28182854/anti-citrullinated-protein-antibodies-are-associated-with-neutrophil-extracellular-traps-in-the-sputum-in-relatives-of-rheumatoid-arthritis-patients
#2
M Kristen Demoruelle, Kylie K Harrall, Linh Ho, Monica M Purmalek, Nickie L Seto, Heather M Rothfuss, Michael H Weisman, Joshua J Solomon, Aryeh Fischer, Yuko Okamoto, Lindsay B Kelmenson, Mark C Parish, Marie Feser, Chelsie Fleischer, Courtney Anderson, Michael Mahler, Jill M Norris, Mariana J Kaplan, Brian D Cherrington, V Michael Holers, Kevin D Deane
OBJECTIVES: Studies suggest that rheumatoid arthritis (RA)-related autoimmunity is initiated at a mucosal site. However, the factors associated with the mucosal generation of this autoimmunity are unknown, especially in individuals who are at-risk for future RA. Therefore, we tested anti-cyclic citrullinated peptide (anti-CCP) antibodies in the sputum of RA-free first-degree relatives (FDRs) of RA patients and patients with classifiable RA. METHODS: We evaluated induced sputum and serum from 67 FDRs and 20 RA subjects for anti-CCP-IgA and anti-CCP-IgG, with cut-off levels for positivity determined in a control population...
February 9, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28178400/levels-of-l-arginine-and-l-citrulline-in-patients-with-erectile-dysfunction-of-different-etiology
#3
A Barassi, M M Corsi Romanelli, R Pezzilli, C A L Damele, L Vaccalluzzo, G Goi, N Papini, G M Colpi, L Massaccesi, G V Melzi d'Eril
Nitric oxide is a physiologic signal essential to penile erection. l-citrulline (l-Cit) is converted into l-arginine (l-Arg), the precursor from which nitric oxide is generated. The level of l-Arg and l-Cit in the field of male sexual function remains relatively underexplored. The aim of the study was to evaluate the level of serum l-Arg and of l-Cit in a group of patients with erectile dysfunction. Diagnosis and severity of erectile dysfunction was based on the IIEF-5 and its etiology was classified as arteriogenic (A-ED), borderline (BL-ED), and non-arteriogenic (NA-ED) with penile echo-color-Doppler in basal condition and after intracaversous injection of prostaglandin E1...
February 8, 2017: Andrology
https://www.readbyqxmd.com/read/28164544/clinical-significance-of-red-blood-cell-distribution-width-and-inflammatory-factors-for-the-disease-activity-in-rheumatoid-arthritis
#4
Li Yunchun, Wang Yue, Fang Z Jun, Su Qizhu, Ding Liumei
BACKGROUND: To evaluate the significance of red blood cell distribution width (RDW) and other factors for the disease activity in rheumatoid arthritis (RA). METHODS: Each patient underwent clinical examination and blood sampling for assessment of serum high-sensitivity C-reactive protein (hs-CRP) levels, erythrocyte sedimentation rate (ESR), hemoglobin concentration (Hb), hematocrit (HCT), RDW, and other erythrocyte parameters (mean corpuscular volume [MCV], mean cell Hb [MCH], mean corpuscular Hb concentration [MCHC])...
December 1, 2016: Clinical Laboratory
https://www.readbyqxmd.com/read/28154345/elevated-serum-levels-of-interleukin-29-are-associated-with-disease-activity-in-rheumatoid-arthritis-patients-with-anti-cyclic-citrullinated-peptide-antibodies
#5
Qiong-Jie Chang, Cheng Lv, Feng Zhao, Ting-Shuang Xu, Ping Li
Rheumatoid arthritis (RA) is an inflammatory autoimmune disease that may lead to progressive joint destruction. The anti-cyclic citrullinated peptide (anti-CCP) antibody is an essential marker for the diagnosis of RA and has a crucial role in the bone destruction in RA. Recent studies have shown that interleukin (IL)-29, a vital member of type III interferon (IFN) family, could enhance proinflammatory cytokine production and might be involved in the joint destruction in RA. Therefore, in this study, we aimed to examine the role of IL-29 in RA patients with anti-CCP antibodies...
2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28141917/enhanced-bruton-s-tyrosine-kinase-activity-in-peripheral-blood-b-lymphocytes-of-autoimmune-disease-patients
#6
Odilia B J Corneth, Gwenny M P Verstappen, Sandra M J Paulissen, Marjolein J W de Bruijn, Jasper Rip, Melanie Lukkes, Jan Piet van Hamburg, Erik Lubberts, Hendrika Bootsma, Frans G M Kroese, And Rudi W Hendriks
OBJECTIVE: Bruton's tyrosine kinase (BTK) transmits crucial survival signals from the B cell receptor (BCR) in B cells. Pharmacological BTK inhibition effectively diminishes disease symptoms in mouse models of autoimmunity and, conversely, transgenic BTK overexpression induces systemic autoimmunity in mice. We investigated BTK expression and activity in human B cells in the context of autoimmune disease. METHODS: Using intracellular flow cytometry, we quantified BTK expression and phosphorylation in peripheral blood B cell subsets in patients with rheumatoid arthritis (RA; n=30) and primary Sjogren's Syndrome (pSS; n=26) and matched healthy controls...
January 31, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28128853/pad4-inhibition-is-sufficient-for-the-amelioration-of-collagen-induced-arthritis
#7
Van C Willis, Nirmal K Banda, Kristen N Cordova, Piyanka E Chandra, William H Robinson, David C Cooper, Dave Lugo, Gaurav Mehta, Simon Taylor, Paul P Tak, Rab K Prinjha, Huw D Lewis, V Michael Holers
Citrullination of joint proteins by the PAD family of enzymes is increasingly recognized as a key process in the pathogenesis of rheumatoid arthritis. This present study was undertaken to explore the efficacy of a novel PAD4-selective inhibitor, GSK199, in the murine collagen-induced arthritis model of rheumatoid arthritis. Mice were dosed daily from the time of collagen immunization with GSK199. Efficacy was assessed against a wide range of endpoints, including clinical disease scores, joint histology and immunohistochemistry, serum and joint citrulline levels, and quantification of synovial autoantibodies using a proteomic array containing joint peptides...
January 27, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28123936/metabolomic-profiling-identifies-potential-pathways-involved-in-the-interaction-of-iron-homeostasis-with-glucose-metabolism
#8
Lars Stechemesser, Sebastian K Eder, Andrej Wagner, Wolfgang Patsch, Alexandra Feldman, Michael Strasser, Simon Auer, David Niederseer, Ursula Huber-Schönauer, Bernhard Paulweber, Stephan Zandanell, Sandra Ruhaltinger, Daniel Weghuber, Elisabeth Haschke-Becher, Christoph Grabmer, Eva Rohde, Christian Datz, Thomas K Felder, Elmar Aigner
OBJECTIVE: Elevated serum ferritin has been linked to type 2 diabetes (T2D) and adverse health outcomes in subjects with the Metabolic Syndrome (MetS). As the mechanisms underlying the negative impact of excess iron have so far remained elusive, we aimed to identify potential links between iron homeostasis and metabolic pathways. METHODS: In a cross-sectional study, data were obtained from 163 patients, allocated to one of three groups: (1) lean, healthy controls (n = 53), (2) MetS without hyperferritinemia (n = 54) and (3) MetS with hyperferritinemia (n = 56)...
January 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28122695/environmental-enteric-dysfunction-is-associated-with-carnitine-deficiency-and-altered-fatty-acid-oxidation
#9
Richard D Semba, Indi Trehan, Ximin Li, Ruin Moaddel, M Isabel Ordiz, Kenneth M Maleta, Klaus Kraemer, Michelle Shardell, Luigi Ferrucci, Mark Manary
BACKGROUND: Environmental enteric dysfunction (EED), a condition characterized by small intestine inflammation and abnormal gut permeability, is widespread in children in developing countries and a major cause of growth failure. The pathophysiology of EED remains poorly understood. METHODS: We measured serum metabolites using liquid chromatography-tandem mass spectrometry in 400 children, aged 12-59months, from rural Malawi. Gut permeability was assessed by the dual-sugar absorption test...
January 18, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28118534/disease-associated-anti-citrullinated-protein-memory-b-cells-in-rheumatoid-arthritis-persist-in-clinical-remission
#10
Adam J Pelzek, Caroline Grönwall, Pamela Rosenthal, Jeffrey D Greenberg, Mandy McGeachy, Larry Moreland, William F C Rigby, Gregg J Silverman
OBJECTIVE: In RA, autoreactive B cells are pathogenic drivers and sources of anti-citrullinated protein antibodies (ACPA) that serve as a diagnostic biomarker and predictor of worse long-term prognosis. Yet the immunobiologic significance of persistent ACPA production at a cellular level is poorly understood. METHODS: In a cross-sectional study of RA patients, we investigated for the presence of continued defects in immune homeostasis as a function of disease activity...
January 24, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28117013/gray-scale-and-power-doppler-ultrasonographic-findings-in-the-assessment-of-disease-activity-and-their-correlation-with-disease-activity-parameters-in-rheumatoid-arthritis
#11
Sandeep Jindal, Reshma Kaushik, Shailendra Raghuvanshi, Rajeev Mohan Kaushik, Rajesh Kakkar
OBJECTIVES: To study the utility of gray scale and power Doppler ultrasonography in assessing the disease activity and correlation of ultrasonographic findings with disease activity parameters in rheumatoid arthritis (RA). MATERIALS AND METHODS: This cross-sectional study was conducted on 100 RA patients diagnosed as per 2010 classification criteria. Rheumatoid factor (RF), serum anti-cyclic citrullinated peptide antibodies (ACPA), erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), disease activity score with 28-joint counts and ESR (DAS28-ESR), visual analogue scale (VAS) for global disease activity and gray scale ultrasonography (GSUS) and power Doppler ultrsonography (PDUS) scores in hands and wrists were determined...
January 19, 2017: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/28108005/in-vitro-allogeneic-immune-cell-response-to-mesenchymal-stromal-cells-derived-from-human-adipose-in-patients-with-rheumatoid-arthritis
#12
P Usha Shalini, J V S Vidyasagar, Lakshmi Kumari Kona, Meenakshi Ponnana, Lakshmi Kiran Chelluri
We investigated the regulatory activity of human adipose-derived mesenchymal stromal cells (MSCs) (n=10) towards immune cells in a cohort of 84 rheumatoid arthritis (RA) patients, 36 apparently healthy controls. We co-cultured MSCs with lymphocyte subsets of T, B, and T regulatory cells (Tregs). Levels of the pro- and anti-inflammatory markers (tumor necrosis factor alpha (TNF-α), interferon gamma (IFN-γ), and interleukin-10 (IL-10)) were estimated in serum and co-culture supernatants. The study revealed a two-fold increase in the proportion of Tregs and an increased level of CD4(+)CD25(+)FoxP3...
January 12, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/28107167/activity-of-the-liver-enzyme-ornithine-carbamoyltransferase-otc-in-blood-lc-ms-ms-assay-for-non-invasive-diagnosis-of-ornithine-carbamoyltransferase-deficiency
#13
Jakub Krijt, Jitka Sokolová, Pavel Ješina, Lenka Dvořáková, Martin Řeboun, Katarína Brennerová, Martin Mistrík, Jiří Zeman, Tomáš Honzík, Viktor Kožich
BACKGROUND: Liver enzymes are released from hepatocytes into circulation and their activity can be measured in the blood. We examined whether the plasma activity of the liver enzyme ornithine carbamoyltransferase, determined by a novel liquid chromatography-mass spectrometry (LC-MS/MS) assay, could be utilized for the detection of OTC deficiency (OTCD), an X-linked inborn error of the urea cycle. METHODS: The plasma ornithine carbamoyltransferase (OTC) activity was assayed in the reverse reaction using isotopically labeled citrulline-d4 as a substrate and by determination of the product, ornithine-d4, by LC-MS/MS analysis...
January 20, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28100358/-study-on-the-effect-and-predictive-to-bronchiectasis-combined-with-rheumatoid-arthritis
#14
W Ding, Y F Zhao, H W Lu, S Liang, K B Cheng, J F Xu
Objective: To explore the clinical characteristics of bronchiectasis(BR)coexisting in patients with rheumatoid arthritis (RA). Methods: One hundred and forty-eight bronchiectasis patients were retrospectively analyzed. These cases were all diagnosed in the Respiratory Department of Shanghai Pulmonary Hospital and Shanghai Gongli Hospital of Pudong New Area during Jan. 2012 to Dec.2015.The patients consisted of 74 males and 74 females, aging from 45 to 79 [mean(65±11)] years. In these patients, coexisting rheumatoid arthritis was found in 34 males and 36 females, aging from 45 to 79[mean(68±12)] years(RA-BR group)...
January 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28068286/pathobiochemical-mechanisms-relating-iron-homeostasis-to-parameters-of-inflammatory-activity-and-autoimmune-disorders-in-rheumatoid-arthritis
#15
Katya I Stefanova, Ginka T Delcheva, Ana I Maneva, Anastas Z Batalov, Mariela G Geneva-Popova, Rositza V Karalilova, Kiril K Simitchiev
AIM: To find the correlations between the parameters of iron homeostasis, inflammatory activity and autoimmune disorders in rheumatoid arthritis (RA). MATERIALS AND METHODS: The present study included 114 patients with RA and 42 healthy controls. We determined the parameters of iron homeostasis: serum iron, total iron binding capacity (TIBC), ferritin and soluble transferrin receptor (sTfR), the parameters of inflammatory activity: C-reactive protein (CRP), interleukin-6 (IL-6) and prohepcidin, and the parameters of autoimmune disorders: rheumatoid factor (RF), anti-cyclic citrullinated peptide (antiCCP) antibodies, and DAS 28...
December 1, 2016: Folia Medica
https://www.readbyqxmd.com/read/28045905/human-leukocytes-kill-brugia-malayi-microfilariae-independently-of-dna-based-extracellular-trap-release
#16
Ciaran J McCoy, Barbara J Reaves, Steeve Giguère, Ruby Coates, Balázs Rada, Adrian J Wolstenholme
BACKGROUND: Wuchereria bancrofti, Brugia malayi and Brugia timori infect over 100 million people worldwide and are the causative agents of lymphatic filariasis. Some parasite carriers are amicrofilaremic whilst others facilitate mosquito-based disease transmission through blood-circulating microfilariae (Mf). Recent findings, obtained largely from animal model systems, suggest that polymorphonuclear leukocytes (PMNs) contribute to parasitic nematode-directed type 2 immune responses. When exposed to certain pathogens PMNs release extracellular traps (NETs) in the form of chromatin loaded with various antimicrobial molecules and proteases...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28035541/effect-of-artemisia-annua-extract-on-treating-active-rheumatoid-arthritis-a-randomized-controlled-trial
#17
Min Yang, Ming-Yang Guo, Yong Luo, Ming-Dong Yun, Jiao Yan, Tao Liu, Chang-Hong Xiao
OBJECTIVE: To investigate the effect and safety of the complementary use of the extract of Artemisia annua L. (EAA) on treating active rheumatoid arthritis (RA). METHODS: A randomized controlled clinical trial was performed. All the 159 participates with active RA were randomly assigned to the control group (80 cases) and EAA group (79 cases). In the control group, patients were medicated with leflflunomide and methotrexate for 48 weeks; and patients in the EAA group were administrated with leflflunomide, methotrexate plus EAA (30 g/d)...
December 29, 2016: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/27987497/-significance-of-different-t-follicular-helper-subsets-in-rheumatoid-arthritis
#18
X M Chen, J Li, X Y Zhang, Y B Jin, D Yu, X L Sun, L J Wu, J He, Z G Li
OBJECTIVE: To detect the expressions of T follicular helper (Tfh) subsets and T follicular helper effect memory (Tfhem) cells in circulation of patients with rheumatoid arthritis (RA), as well as to examine their roles in providing biomarkers for active RA. METHODS: This study enrolled 41 patients with RA, who were navely-treated or had no application of hormone and disease-modifying anti-rheumatic drugs in recent 3 months, as well as 32 healthy controls. The percentages of Tfhem (CD4(+)CXCR5(+)CCR7(low)PD1(high)) cells, Tfh (CD3(+)CD4(+)CXCR5(+)CD45RA(-)) subsets, Tfh1 (CXCR3(+)CCR6(-)Tfh),Tfh2 (CXCR3(-)CCR6(-)Tfh),and Tfh17 (CXCR3(-)CCR6(+)Tfh), were determined by flow cytometry of peripheral blood from the patients with RA and health controls...
December 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/27987496/-detection-of-peripheral-follicular-helper-t-cells-in-rheumatoid-arthritis
#19
L M An, J Li, L L Ji, G T Li, Z L Zhang
OBJECTIVE: To detect cell frequency and surface markers of peripheral CD4(+)CXCR5+ follicular helper T (Tfh) cells and analyze the correlation between CD4(+)CXCR5(+)Tfh cells and rheumatoid arthritis (RA) disease activity. METHODS: Forty RA patients meeting the American College of Rheumatology classification criteria for RA and twenty healthy controls (HC) were included. The peripheral blood mononuclear cells and sera were collected. The expressions of CD4+CXCR5(+)Tfh cells (CXCR5, C-X-C chemokine receptor type 5) and inducible T cell costimulator (ICOS), programmed death 1 positive (PD-1), interleukin-21 receptor (IL-21R) and CD40 ligand (CD40L) positive on CD4(+)CXCR5(+)Tfh cells were analyzed by flow cytometry...
December 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/27987495/-significance-of-v-raf-murine-sarcoma-viral-oncogene-homologue-b1-in-rheumatoid-arthritis
#20
Y J Jin, L Sun, L Yang, R Xing, X Y Liu
OBJECTIVE: To detect serum v-raf murine sarcoma viral oncogene homologue B1 (BRAF) protein levels and to investigate their clinical significance in rheumatoid arthritis (RA) patients. METHODS: Serum samples were obtained from 78 RA patients, 32 osteoarthritis (OA) patients, 16 systemic lupus erythematosus (SLE) patients, 16 gout patients, 16 ankylosing spondylitis (AS) patients, 16 Sjogren syndrome (SS) patients and 30 healthy controls. BRAF protein in the sera was examined by enzyme-linked immunosorbent assay (ELISA)...
December 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
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