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Citrullinated peptides

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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
#1
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
#2
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
#3
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
https://www.readbyqxmd.com/read/28420837/clinical-characteristics-of-rheumatoid-arthritis-patients-achieving-functional-remission-with-six-months-of-biological-dmards-treatment
#4
Yusuke Miwa, Ryo Takahashi, Yuzo Ikari, Airi Maeoka, Shinichiro Nishimi, Nao Oguro, Tomoki Hayashi, Mika Hatano, Sakiko Isojima, Ryo Yanai, Tsuyoshi Kasama, Yoichi Toyoshima, Katsunori Inagaki, Kenji Sanada
Objective Although previous studies have reported the prognostic factors for functional remission, no reports have cited the predictive factors. Our aim was to study the predictive factors for functional remission, which is a treatment goal in rheumatoid arthritis (RA), after receiving biological disease-modifying antirheumatic drugs (bDMARDs) treatment for six months. Methods The study consisted of 333 RA patients treated with bDMARDs for six months. The following patient characteristics were investigated: age, gender, disease duration, type of bDMARDs, baseline steroid and methotrexate dosage, and levels of serum rheumatoid factor, matrix metalloprotease, anti-cyclic citrullinated peptides antibody, tumor necrosis factor-α, and interleukin-6...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28409899/genetic-variation-of-the-alpha-1-antitrypsin-gene-is-associated-with-increased-autoantibody-production-in-rheumatoid-arthritis
#5
Cormac McCarthy, Carl Orr, Laura Fee, Danielle M Dunlea, David J L Hunt, Eimear Dunne, Tomás P Carroll, Paul O'Connell, Geraldine McCarthy, Dermot Kenny, Ursula Fearon, Douglas J Veale, Emer P Reeves, Noel G McElvaney
OBJECTIVE: To examine the prevalence of alpha-1 antitrypsin (AAT) deficiency (AATD) in rheumatoid arthritis (RA), and to determine if AATD is associated with higher levels of rheumatoid factor (RF), antinuclear antibodies (ANA) and anti-citrullinated peptide auto-antibodies (ACPA). METHODS: RF, ANA and ACPA were measured by standard immunoturbidimetry, immunofluorescence and ELISA, respectively. Characterisation of AAT phenotypes was performed by isoelectric focussing and immunofixation...
April 13, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28403797/is-the-treatment-with-biological-or-non-biological-dmards-a-modifier-of-periodontal-condition-in-patients-with-rheumatoid-arthritis
#6
Consuelo Romero-Sanchez, Constanza Rodríguez, Pedro Santos, Ana María Mesa, Gloria Inés Lafaurie, Sebastian Giraldo, Juliette De Avila, Diana Marcela Castilla, Michelle Durán, Philippe Chalem, Juan Manuel Bello, Rafael Valle
BACKGROUND AND OBJECTIVE: Experimental models suggest the use of different therapy protocols in rheumatoid arthritis (RA) as modulators on periodontal condition. This study evaluated the effects of conventional drug treatment and anti-TNF therapy in patients with RA on microbiological and periodontal condition, establishing the association of markers of periodontal infection with indexes of rheumatic activity. MATERIALS AND METHODS: One hundred seventy nine individuals with RA were evaluated (62 with anti-TNF-α and 115 with only DMARDs)...
April 7, 2017: Current Rheumatology Reviews
https://www.readbyqxmd.com/read/28399834/compliance-and-persistence-with-oral-bisphosphonates-for-the-treatment-of-osteoporosis-in-female-patients-with-rheumatoid-arthritis
#7
Ji-Heh Park, Eun-Kyoung Park, Dong-Wan Koo, Shinwon Lee, Sun-Hee Lee, Geun-Tae Kim, Seung-Geun Lee
BACKGROUND: Poor adherence with oral bisphosphonates (BPs) can mitigate their therapeutic benefit for osteoporosis and is a significant clinical burden. Most previous studies regarding adherence with oral BPs have focused on postmenopausal osteoporosis, but little attention has been given to patients with rheumatoid arthritis (RA). Thus, we investigated compliance and persistence with oral BPs in the treatment of osteoporosis and analyzed risk factors for poor adherence in female patients with (RA) in real setting...
April 11, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28397468/association-of-serum-interleukin-28b-with-clinical-features-laboratory-values-and-radiographic-score-in-rheumatoid-arthritis-patients
#8
Cheng Lv, Qiong-Jie Chang, Feng Zhao, Li-Qi Bi, Ping Li
BACKGROUND: Interleukin-28B (IL-28B) is a member of the interferon lambda family (also known as type III interferons), it has already been studied in many diseases, but it has almost never been studied in rheumatoid arthritis (RA). With this background, we determined the serum levels of IL-28B in RA patients and investigated its clinical significances. METHODS: IL-28B levels were measured by enzyme-linked immunosorbent assay (ELISA) in 80 RA patients and 80 healthy controls...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28384257/serum-th1-and-th17-related-cytokines-and-autoantibodies-in-patients-with-posner-schlossman-syndrome
#9
Jun Zhao, Wenchieh Chen, Xiaosheng Huang, Shiming Peng, Tianhui Zhu, Zhihui Deng, Ping Liang, Hui Chang, Bao Jian Fan
Posner-Schlossman syndrome (PSS) shares some clinical features with uveitis and open angle glaucoma. Cytokines and autoantibodies have been associated with uveitis and open angle glaucoma. However, the role of serum cytokines and autoantibodies in the pathogenesis of PSS remains unknown. This study aimed to evaluate the associations of type 1 T helper (Th1) and Th17 related cytokines and autoantibodies with PSS. Peripheral blood serum samples were collected from 81 patients with PSS and 97 gender- and age-matched healthy blood donors...
2017: PloS One
https://www.readbyqxmd.com/read/28381807/evaluation-of-the-effects-and-mechanism-of-l-citrulline-on-anti-obesity-by-appetite-suppression-in-obese-diabetic-kk-ay-mice-and-high-fat-diet-fed-sd-rats
#10
Maya Kudo, Hisae Yoshitomi, Maki Momoo, Shiori Suguro, Yoshie Yamagishi, Ming Gao
L-Citrulline (L-Cit), a free amino acid from watermelon, has effects on hypertension and anti-oxidization; however, there are few reports of effects related to obesity. This study investigated the effects and mechanism of L-Cit on anti-obesity in obese/diabetic KK-Ay mice and high-fat diet fed Sprague-Dawley (SD) rats. L-Cit induced significant reduction of food intake, body weight and fat tissue mass in obese/diabetic KK-Ay mice. Moreover, blood glucose level did not change but free fatty acid level and serum insulin level were significantly decreased by treatment with L-Cit, suggesting that L-Cit improved glucose and fatty metabolism in obesity model mice...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28380667/antibodies-to-citrullinated-peptides-in-patients-with-juvenile-idiopathic-arthritis-and-rheumatoid-arthritis-shared-expression-of-the-inherently-autoreactive-9g4-idiotype
#11
Hannah Peckham, Geraldine Cambridge, Lauren Bourke, Debajit Sen, Anna Radziszewska, Maria Leandro, Yiannis Ioannou
Objective Antibodies to cyclic citrullinated peptides (CCP) in rheumatoid arthritis (RA) can express the inherently autoreactive gene, VH4-34, as detected using the rat monoclonal antibody, 9G4. Patients with the polyarticular sub-type of juvenile idiopathic arthritis (pJIA) share some but not all features of RA in adults. The aim of this study was to profile rheumatoid factor (RF), anti-CCP and 9G4-CCP serology of a large JIA cohort and compare to a cohort of adult RA patients. Methods Serum from 88 pJIA, 29 enthesitis-related arthritis (ERA), 38 extended oligoarthritis (EOA), 31 adolescent controls, 35 RA and 30 adult controls were tested for RF, IgG, IgA and IgM anti-CCP and 9G4+CCP by ELISA...
April 5, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28376065/chikungunya-virus-and-autoimmunity
#12
Amir Tanay
PURPOSE OF REVIEW: Chikungunya virus (CHIKV) is a mosquito-borne alphavirus. Fever, rash and severe arthralgia are the hallmarks of chikungunya fever (CHIKF), the disease caused by this virus. The acute course of the disease usually lasts few weeks to months. Chronic, relapsing or persistent arthralgia and arthritis have been described mimicking rheumatoid arthritis (RA), requiring immunosuppressive drugs.The purpose of this review is to characterize both the chronic clinical course of CHIKF-associated arthritis and the immunological pathogenic mechanisms involved...
April 1, 2017: Current Opinion in Rheumatology
https://www.readbyqxmd.com/read/28374504/polymorphisms-in-the-promoter-region-of-inos-predispose-to-rheumatoid-arthritis-in-south-indian-tamils
#13
V S Negi, C M Mariaselvam, D P Misra, N Muralidharan, C Fortier, D Charron, R Krishnamoorthy, R Tamouza
Nitric oxide synthase (NOS) catalyses the production of nitric oxide (NO) from L-Arginine, which participates in diverse biological processes including inflammation and apoptosis. Macrophages, chondrocytes, osteoblasts and osteoclasts express inducible NOS (iNOS) at the site of synovial inflammation. NO produced at the inflamed joint may contribute to peri-articular bone loss, mediate apoptosis and regulate Th1/Th2 balance in rheumatoid arthritis (RA). Variations in the promoter region of NOS gene regulate the nitric oxide synthase expression and iNOS (NOS2) polymorphisms have been associated with susceptibility to autoimmune disorders...
April 4, 2017: International Journal of Immunogenetics
https://www.readbyqxmd.com/read/28367663/three-out-of-four-disease-modifying-anti-rheumatic-drug-na%C3%A3-ve-rheumatoid-arthritis-patients-meet-28-joint-disease-activity-score-remission-at-12%C3%A2-months-results-from-the-fin-era-cohort
#14
T Rannio, J Asikainen, P Hannonen, T Yli-Kerttula, P Ekman, L Pirilä, L Kuusalo, M Mali, M Puurtinen-Vilkki, S Kortelainen, J Paltta, K Taimen, M Kauppi, K Laiho, S Nyrhinen, H Mäkinen, P Isomäki, T Uotila, K Aaltonen, H Kautiainen, T Sokka
OBJECTIVE: To assess what proportion of patients with disease-modifying anti-rheumatic drug (DMARD)-naïve early rheumatoid arthritis (ERA) reach 28-joint Disease Activity Score (DAS28) remission over 1 year, and remission variability across clinics in Finland. METHOD: Patients with DMARD-naïve newly diagnosed inflammatory arthritis were recruited. The proportion of patients in 28-joint Disease Activity Score with three variables (DAS28-3) remission was compared across sites...
April 3, 2017: Scandinavian Journal of Rheumatology
https://www.readbyqxmd.com/read/28364381/adalimumab-with-methotrexate-in-treatment-na%C3%A3-ve-japanese-patients-with-rheumatoid-arthritis-at-risk-of-progressive-structural-joint-damage-a-postmarketing-observational-study
#15
Yukiko Ito, Kaori Hozumi, Yukiko Okada, Sarina Kurimoto
INTRODUCTION: The objective of this study was to evaluate the real-world safety and effectiveness of adalimumab with methotrexate (MTX) in disease-modifying antirheumatic drug (DMARD)- and biologic-naïve Japanese patients with rheumatoid arthritis (RA) at risk of progressive structural joint damage. METHODS: This multicenter, prospective, observational, postmarketing surveillance study was conducted between February 2013 and April 2015 at 84 centers in Japan. Patients with RA at risk of progressive structural joint damage were enrolled and initiated treatment with adalimumab and MTX...
March 31, 2017: Rheumatology and Therapy
https://www.readbyqxmd.com/read/28356135/dna-methylation-mediates-genotype-and-smoking-interaction-in-the-development-of-anti-citrullinated-peptide-antibody-positive-rheumatoid-arthritis
#16
Weida Meng, Zaihua Zhu, Xia Jiang, Chun Lai Too, Steffen Uebe, Maja Jagodic, Ingrid Kockum, Shahnaz Murad, Luigi Ferrucci, Lars Alfredsson, Hejian Zou, Lars Klareskog, Andrew P Feinberg, Tomas J Ekström, Leonid Padyukov, Yun Liu
BACKGROUND: Multiple factors, including interactions between genetic and environmental risks, are important in susceptibility to rheumatoid arthritis (RA). However, the underlying mechanism is not fully understood. This study was undertaken to evaluate whether DNA methylation can mediate the interaction between genotype and smoking in the development of anti-citrullinated peptide antibody (ACPA)-positive RA. METHODS: We investigated the gene-smoking interactions in DNA methylation using 393 individuals from the Epidemiological Investigation of Rheumatoid Arthritis (EIRA)...
March 29, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28355564/smarcad1-contributes-to-the-regulation-of-naive-pluripotency-by-interacting-with-histone-citrullination
#17
Shu Xiao, Jia Lu, Bharat Sridhar, Xiaoyi Cao, Pengfei Yu, Tianyi Zhao, Chieh-Chun Chen, Darina McDee, Laura Sloofman, Yang Wang, Marcelo Rivas-Astroza, Bhanu Prakash V L Telugu, Dana Levasseur, Kang Zhang, Han Liang, Jing Crystal Zhao, Tetsuya S Tanaka, Gary Stormo, Sheng Zhong
Histone citrullination regulates diverse cellular processes. Here, we report that SMARCAD1 preferentially associates with H3 arginine 26 citrullination (H3R26Cit) peptides present on arrays composed of 384 histone peptides harboring distinct post-transcriptional modifications. Among ten histone modifications assayed by ChIP-seq, H3R26Cit exhibited the most extensive genomewide co-localization with SMARCAD1 binding. Increased Smarcad1 expression correlated with naive pluripotency in pre-implantation embryos...
March 28, 2017: Cell Reports
https://www.readbyqxmd.com/read/28352064/clinical-characteristics-associated-with-occurrence-and-poor-prognosis-of-interstitial-lung-disease-in-rheumatoid-arthritis
#18
Ji Ae Yang, Jeong Seok Lee, Jin Kyun Park, Eun Bong Lee, Yeong Wook Song, Eun Young Lee
Background/Aims: To analyze clinical characteristics of interstitial lung disease (ILD) associated with rheumatoid arthritis (RA), especially in patients with poor prognosis. Methods: Seventy-seven RA patients with ILD and 231 age, sex, and disease duration-matched RA patients without ILD were enrolled in this retrospective study. Epidemiologic, clinical, and laboratory information were obtained through a medical chart review. Logistic regression analysis was used to estimate the risk of mortality in RA patients with ILD...
March 28, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28339354/the-effects-of-an-educational-meeting-and-subsequent-computer-reminders-on-the-ordering-of-laboratory-tests-by-rheumatologists-an-interrupted-time-series-analysis
#19
Nienke Lesuis, Nathan den Broeder, Nadine Boers, Ester Piek, Steven Teerenstra, Marlies Hulscher, Ronald van Vollenhoven, Alfons A den Broeder
OBJECTIVES: To examine the effects of an educational meeting and subsequent computer reminders on the number of ordered laboratory tests. METHODS: Using interrupted time series analysis we assessed whether trends in the number of laboratory tests ordered by rheumatologists between September 2012 and September 2015 at the Sint Maartenskliniek (the Netherlands) changed following an educational meeting (September 2013) and the introduction of computer reminders into the Computerised Physician Order Entry System (July 2014)...
March 23, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28336519/anticollagen-type-ii-antibodies-are-associated-with-an-acute-onset-rheumatoid-arthritis-phenotype-and-prognosticate-lower-degree-of-inflammation-during-5%C3%A2-years-follow-up
#20
Vivek Anand Manivel, Mohammed Mullazehi, Leonid Padyukov, Helga Westerlind, Lars Klareskog, Lars Alfredsson, Saedis Saevarsdottir, Johan Rönnelid
OBJECTIVE: Antifibrillar collagen type II (anti-CII) antibody-positive patients with rheumatoid arthritis (RA) have early but not late signs of increased inflammation and joint erosions. We wanted to replicate this in a large RA cohort, and to relate to human leukocyte antigen (HLA)-DRB1* alleles. METHODS: Anti-CII and anti-cyclic citrullinated peptide (CCP)2 were measured at baseline in 773 patients with RA from the Swedish Epidemiological Investigation in Rheumatoid Arthritis (EIRA) study with clinical follow-up data from the Swedish Rheumatology Quality Register (SRQ) registry, and 1476 with HLA-DRB1* information...
March 23, 2017: Annals of the Rheumatic Diseases
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