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Citrullinated peptides

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https://www.readbyqxmd.com/read/28532395/factors-associated-with-hand-joint-destruction-in-chinese-patients-with-rheumatoid-arthritis
#1
Lijuan Zhang, Jing Wang, Qiuxiang Zhang, Ting Fu, Rulan Yin, Ze Wang, Liren Li, Xianhua Wu, Zhifeng Gu
BACKGROUND: There have been no previous report of hand joint destruction prevalence in Chinese rheumatoid arthritis (RA) patients. Therefore, the aim of this study was to investigate the prevalence and potential factors of hand joint destruction among RA patients from Nantong China. In addition, we wanted to examine the differences between functional capacity, psychological status, and quality of life in patients with hand joint destruction compared to those without hand joint destruction...
May 22, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28516880/abatacept-therapy-reduces-cd28-cxcr5-follicular-helper-like-t-cells-in-patients-with-rheumatoid-arthritis
#2
Shunsuke Fukuyo, Shingo Nakayamada, Shigeru Iwata, Satoshi Kubo, Kazuyoshi Saito, Yoshiya Tanaka
OBJECTIVES: The characteristics of T cells targeted by abatacept (ABT) in cases of rheumatoid arthritis (RA) are still unknown. The goal of the study was to determine the pathogenicity of T cells and the predictors of therapeutic effects of ABT. METHODS: We analysed the peripheral T cell phenotype of 34 RA patients via flow cytometry. The correlation of the phenotypes of CD4+ T cells with clinical disease activity and change in CD4+ T cell subsets at baseline and 24 weeks after ABT treatment were evaluated...
April 27, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28516872/glucocorticoid-sparing-effect-of-first-year-anti-tnf%C3%AE-treatment-in-rheumatoid-arthritis-corpus-cohort
#3
Carole Duquenne, Daniel Wendling, Jean Sibilia, Chantal Job-Deslandre, Loic Guillevin, Jacques Benichou, René Marc Flipo, Francis Guillemin, Alain Saraux
OBJECTIVES: Anti-TNFα agents are indicated in selected patients with rheumatoid arthritis (RA) who respond inadequately to methotrexate and particularly when glucocorticoids are mandatory. We evaluated whether a glucocorticoid-sparing effect occurred during the first year of anti-TNF-α therapy. METHODS: Between 2007 and 2009, the French multicentre, longitudinal, prospective, observational, population-based CORPUS cohort included biologic-naive patients with inflammatory joint disease...
May 15, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28516867/the-link-between-proteus-mirabilis-environmental-factors-and-autoantibodies-in-rheumatoid-arthritis
#4
REVIEW
Taha Rashid, Alan Ebringer, Clyde Wilson
Rheumatoid arthritis (RA) is a relatively common and potentially disabling immune-mediated inflammatory systemic disease, predominantly affecting women and characterised by multiple small joint arthritis. Extensive data supports the roles of genetic, environmental and microbial factors in the triggering and development of this disease. Proteus mirabilis is considered as the main microbial culprit in the causation of RA. The evidence for the role of these microbes in RA and their links with commonly associated autoantibodies such as rheumatoid factors and anti-citrullinated peptide antibodies have been elucidated together with their relations with some of the non-microbial environmental factors which have been implicated in the aetiopathogenesis of RA...
May 8, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28511426/effect-of-anti-cyclic-citrullinated-peptide-and-hla-drb1-subtypes-on-clinical-disease-activity-index-in-rheumatoid-arthritis-patients
#5
Akbar Soleimani, Zahra Mobedi, Maryam Al-E-Rasul, Abolghasem Sharifi, Abdolrahim Kazemi Vardanjani
INTRODUCTION: Rheumatoid arthritis (RA) is a crippling disease with a global prevalence of approximately 0.5%-1% in adults. Genetic, environmental and immunologic factors contribute importantly to pathogenesis of RA. American College of Rheumatology (ACR) assists in early diagnosis of the disease. AIM: The aim of this study was to investigate the effects of HLA-DRB1 gene and anti-Cyclic Citrullinated Peptide (CCP) antibody on Clinical Disease Activity Index (CDAI) and to determine the frequency of HLA-DRB1 alleles in the patients with RA...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28510260/markers-of-enteral-adaptation-in-pediatric-cases-with-short-bowel-syndrome
#6
Masahiro Chiba, Yutaka Sanada, Akira Toki
BACKGROUND: This study aimed to ascertain if prospective determinations of specific gut hormones and growth factors could predict bowel adaptation in children with short bowel syndrome (SBS). METHODS: We studied parenteral nutrition (PN) independency as the short-term result and discontinuation of enteral nutrition (EN) as the long-term result from a retrospective chart review of 7 patients with SBS, who were managed in the absence of growth retardation. The correlation between increased numbers of enteral feedings or enteral nutrients and fasting levels of serum gastrin, glucagon-like peptide 2 (GLP-2), citrulline, and diamine oxidase (DAO) activity was analyzed...
May 16, 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28509333/altered-glycan-accessibility-on-native-immunoglobulin-g-complexes-in-early-rheumatoid-arthritis-and-its-changes-during-therapy
#7
Judith Stümer, Mona H C Biermann, Jasmin Knopf, Iryna Magorivska, Alf Kastbom, Anna Svärd, Christina Janko, Rostyslav Bilyy, Georg Schett, Christopher Sjöwall, Martin Herrmann, Luis E Muñoz
The goal of this study was to investigate the glycosylation profile of native IgG present in serum immune complexes in patients with rheumatoid arthritis (RA). To accomplish this, lectin binding assays, detecting the accessibility of glycans present on IgG-containing immune complexes by biotinylated lectins were employed. Lectins capturing fucosyl residues (AAL), fucosylated tri-mannose N-glycan core sites (LCA), terminal sialic acid residues (SNA) and O-glycosidically-linked galactose/N-acetylgalactosamine (GalNac-L) were used...
May 16, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28506920/regulatory-b-cells-in-rheumatoid-arthritis-alterations-in-patients-receiving-anti-tnf-therapy
#8
Zsuzsanna Bankó, Judit Pozsgay, Tamás Gáti, Bernadette Rojkovich, Ilona Ujfalussy, Gabriella Sármay
Cytokines, including tumor necrosis factor alpha (TNFα) are involved in Rheumatoid arthritis (RA) pathogenesis by augmenting autoimmunity, sustaining long term inflammation in the synovium, and promoting joint damage. Anti-TNF therapy is one of the most efficient and widely used therapies for RA, although its mechanism is not clarified yet. Earlier we demonstrated that RA patients have a reduced number of IL-10 producing regulatory B cells (B10 cells) as compared to healthy individuals and they are functionally impaired...
May 12, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28505163/anti-citrullinated-peptide-antibodies-are-the-strongest-predictor-of-clinically-relevant-radiographic-progression-in-rheumatoid-arthritis-patients-achieving-remission-or-low-disease-activity-a-post-hoc-analysis-of-a-nationwide-cohort-in-japan
#9
Tomohiro Koga, Akitomo Okada, Takaaki Fukuda, Toshihiko Hidaka, Tomonori Ishii, Yukitaka Ueki, Takao Kodera, Munetoshi Nakashima, Yuichi Takahashi, Seiyo Honda, Yoshiro Horai, Ryu Watanabe, Hiroshi Okuno, Toshiyuki Aramaki, Tomomasa Izumiyama, Osamu Takai, Taiichiro Miyashita, Shuntaro Sato, Shin-Ya Kawashiri, Naoki Iwamoto, Kunihiro Ichinose, Mami Tamai, Tomoki Origuchi, Hideki Nakamura, Kiyoshi Aoyagi, Katsumi Eguchi, Atsushi Kawakami
OBJECTIVES: To determine prognostic factors of clinically relevant radiographic progression (CRRP) in patients with rheumatoid arthritis (RA) achieving remission or low disease activity (LDA) in clinical practice. METHODS: Using data from a nationwide, multicenter, prospective study in Japan, we evaluated 198 biological disease-modifying antirheumatic drug (bDMARD)-naïve RA patients who were in remission or had LDA at study entry after being treated with conventional synthetic DMARDs (csDMARDs)...
2017: PloS One
https://www.readbyqxmd.com/read/28502137/angiopoietin-2-as-a-biomarker-for-echocardiographic-abnormalities-and-carotid-atherosclerosis-in-rheumatoid-arthritis-patients
#10
Hanan Omar, Ahmed Tageldien Abdellah, Housseini Abdalla, Samah Ismail Nasef, Hamdy Omar
Atherosclerosis and cardiovascular diseases (CVD) are increasingly recognised complications of rheumatoid arthritis (RA). Angiopoietin 2 (Ang-2) levels have been associated with clinically overt CVD in general population; we assessed serum Ang-2 levels and its correlation with Echocardiographic abnormalities and carotid intima-media thickness in RA patients. 44 RA patients without clinically overt CVD and 44 healthy controls were assessed by questionnaire and clinical examination. Disease activity score (DAS-28) was calculated...
June 2016: Egyptian Journal of Immunology
https://www.readbyqxmd.com/read/28481943/citrullination-only-infrequently-impacts-peptide-binding-to-hla-class-ii-mhc
#11
John Sidney, Stephane Becart, Mimi Zhou, Karen Duffy, Mikaela Lindvall, Erin C Moore, Eugene L Moore, Tadimeti Rao, Navin Rao, Morten Nielsen, Bjoern Peters, Alessandro Sette
It has been hypothesized that HLA class II alleles associated with rheumatoid arthritis (RA) preferentially present self-antigens altered by post-translational modification, such as citrullination. To understand the role of citrullination we tested four RA-associated citrullinated epitopes and their corresponding wild-type version for binding to 28 common HLA class II. Binding patterns were variable, and no consistent impact of citrullination was identified. Indeed, in one case citrullination significantly increased binding compared to the WT peptide, in another citrullination was associated with a reduction in promiscuity by 40%...
2017: PloS One
https://www.readbyqxmd.com/read/28461705/higher-levels-of-matrix-metalloproteinase-3-in-patients-with-ra-reflect-disease-activity-and-structural-damage
#12
Martina Skacelova, Zuzana Hermanova, Pavel Horak, Kazi Ahmed, Katerina Langova
AIMS: To evaluate the serum levels of matrix metalloproteinase-3 (MMP-3) as a potential marker of disease activity and joint damage in 92 patients with rheumatoid arthritis (RA), compared to 24 osteoarthritis (OA) patients and 26 healthy controls. METHODS: The concentrations of MMP-3 were measured by ELISA using the commercial kit AESKULISA DF MMP-3 (AESKU.Diagnostics, Germany) and compared with other laboratory parameters routinely used to assess the disease status, clinical score (DAS28) and radiographic stage in the group of RA patients...
April 26, 2017: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/28460514/-the-456th-case-polyarthritis-dry-cough-dyspnea-on-exertion
#13
Y Li, X Y Ren, F Sun, P Wang, J L Zhao, Q J Wu, X F Zeng
A 53-year-old woman presented with arthralgia and dyspepsia on exertion.Symmetrical joint swelling and pain of bilateral hands with pigmentation sedimentation in the articular surfaces, dry cough and short of breath were the main clinical manifestations.Elevated levels of erythrocyte sedimentation rate(89 mm/1 h), C-reactive protein (64.45 mg/L), IgG(31.22 g/L) and IgA (5.44 g/L). Rheumatoid factor was positive and anti-cyclic citrullinated peptide antibody was negative.Chest high-resolution computed tomography scan found that diffusely distributed lung nodules, round cysts with varying sizes and patchy ground glass opacities...
May 1, 2017: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
https://www.readbyqxmd.com/read/28459968/hla-shared-epitope-inflammation-mortality-cvd-and-malignancy-among-postmenopausal-women-with-and-without-rheumatoid-arthritis-in-the-women-s-health
#14
Mehret Birru Talabi, Rachel H Mackey, Lewis H Kuller, Janice S Dorman, Kevin D Deane, William H Robinson, Brian T Walitt, Yuefang Chang, V Michael Holers, Simin Liu, Larry W Moreland
Specific human leukocyte antigen (HLA)-DRB1 alleles encode a "shared epitope" (SE) associated with rheumatoid arthritis (RA), especially more severe cyclic-citrullinated peptide antibody-positive (anti-CCP+) RA. Associations of SE alleles (0, 1 or 2) with total and cardiovascular disease (CVD) mortality and incident coronary heart disease (CHD), CVD and malignancy over mean (SD) = 8.9(3.5) years of follow-up were evaluated, stratified by baseline anti-CCP (+ vs. -). The longitudinal Women's Health Initiative (WHI) -RA study (1993-2010), sampled postmenopausal women who reported RA at baseline (1993-1998) or follow-up in WHI, classified as anti-CCP+ RA (n = 556) or anti-CCP- not RA (n = 1,070)...
April 28, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28455445/the-soluble-protease-adamdec1-released-from-activated-platelets-hydrolyzes-platelet-membrane-pro-egf-to-active-high-molecular-weight-egf
#15
Rui Chen, Ge Jin, Thomas M McIntyre
Platelets are the sole source of EGF in the circulation, yet how EGF is stored or released from stimulated cells are undefined. In fact, we found platelets did not store EGF, synthesized as a single 6 kDa domain in pro-EGF, but rather expressed intact pro-EGF precursor on granular and plasma membranes. Activated platelets released high-molecular-weight (HMW)-EGF, produced by a single cleavage between the EGF and transmembrane domains of pro-EGF. We synthesized a fluorogenic peptide encompassing residues surrounding the putative sessile arginyl residue and found stimulated platelets released a soluble activity that cleaved this pro-EGF1020-1027 peptide...
April 28, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28450917/diagnostic-value-of-high-frequency-color-doppler-ultrasonography-examination-in-combination-with-anti-cyclic-citrullinated-peptide-antibody-testing-in-rheumatoid-arthritis-patients
#16
Ming-Yu Wang, Xian-Bin Wang, Xue-Hui Sun, Feng-Li Liu, Sheng-Chuan Huang
We studied the diagnostic value of high-frequency color Doppler ultrasonography (HCDU) examination in combination with anti-cyclic citrullinated peptide (anti-CCP) antibody testing in rheumatoid arthritis (RA) patients with finger joint damage. From January 2015 to December 2015, 80 patients diagnosed with RA with finger joints damage were enrolled in this study. Patients were examined with HCDU. Serum anti-CCP antibody level was tested using ELISA, and results were compared with the healthy control group. Results obtained by ELISA demonstrated that the positive rate of anti-CCP antibodies was 73...
March 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28446208/calgizzarin-s100a11-a-novel-inflammatory-mediator-associated-with-disease-activity-of-rheumatoid-arthritis
#17
Lucie Andrés Cerezo, Barbora Šumová, Klára Prajzlerová, David Veigl, Dres Damgaard, Claus Henrik Nielsen, Karel Pavelka, Jiří Vencovský, Ladislav Šenolt
BACKGROUND: Calgizzarin (S100A11) is a member of the S100 protein family that acts in different tumors by regulating a number of biologic functions. Recent data suggest its association with low-grade inflammation in osteoarthritis (OA). The aim of our study is to compare S100A11 expression in the synovial tissues, synovial fluid and serum of patients with rheumatoid arthritis (RA) and osteoarthritis (OA) and to characterize the potential association between S100A11 and disease activity...
April 26, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28431974/unique-mitochondrial-localization-of-arginase-1-and-2-in-hepatocytes-of-air-breathing-walking-catfish-clarias-batrachus-and-their-differential-expression-patterns-under-hyper-ammonia-stress
#18
Bodhisattwa Banerjee, Debaprasad Koner, Priyanka Lal, Nirmalendu Saha
Arginase (ARG) catalyzes the final step of ornithine-urea cycle (OUC) leading to a conversion of L-arginine to L-ornithine and urea. Several isoforms of ARG have been reported in vertebrates, out of which the two predominant isoforms are the cytosolic ARG1 and the mitochondrial ARG2. The air-breathing walking catfish (Clarias batrachus) is frequently being challenged by different environmental insults such as hyper-ammonia, dehydration and osmotic stresses in their natural habitats throughout the year. The present study investigated the active presence of ARG1 and ARG2 isoforms in hepatocytes along with unique localization of both the isoforms inside the mitochondria, and also their specific expression patterns under hyper-ammonia stress (5mM NH4Cl) in isolated hepatocytes of walking catfish...
April 18, 2017: Gene
https://www.readbyqxmd.com/read/28429118/-how-frequent-are-poor-prognostic-markers-in-rheumatoid-arthritis-an-estimate-based-on-three-epidemiologic-cohorts
#19
K Albrecht, A Richter, Y Meissner, D Huscher, L Baganz, K Thiele, M Schneider, A Strangfeld, A Zink
BACKGROUND: Unfavorable prognostic factors-high disease activity, early erosions, and autoantibodies-should be considered when making treatment decisions in rheumatoid arthritis (RA). There are little data on the frequency of individual poor prognostic factors among RA patients in daily care. METHODS: Disease activity (Disease Activity Score, DAS28), erosions, antibodies against citrullinated peptides or rheumatoid factor (ACPA/RF+), previous treatment failure, inflammation markers, and functional disability (FFbH < 70) were defined as prognostic factors...
April 20, 2017: Zeitschrift Für Rheumatologie
https://www.readbyqxmd.com/read/28424905/association-of-stat4-rs7574865-and-ptpn22-rs2476601-polymorphisms-with-rheumatoid-arthritis-and-non-systemically-reacting-antibodies-in-egyptian-patients
#20
Dalia El-Lebedy, Hala Raslan, Alshaymaa Ibrahim, Ingy Ashmawy, Shereen Abd El-Aziz, Asmaa M Mohammed
The aim of this study was to investigate association of protein tyrosine phosphatase non-receptor type 22 (PTPN22) rs2476601 and signal transducer and activator of transcription 4 (STAT4) rs7574865 polymorphisms with rheumatoid arthritis (RA) susceptibility and to assess potential association with the status of rheumatoid factor (RF) and anti-cyclic citrullinated peptide (anti-CCP) antibodies, serum neopterin, and disease activity. RF, anti-CCP antibodies, and neopterin were assayed in serum of 100 unrelated RA patients and 114 controls...
April 19, 2017: Clinical Rheumatology
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