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Citrulline AND NO

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https://www.readbyqxmd.com/read/29472233/novel-role-of-il-interleukin-1%C3%AE-in-neutrophil-extracellular-trap-formation-and-abdominal-aortic-aneurysms
#1
Akshaya K Meher, Michael Spinosa, John P Davis, Nicolas Pope, Victor E Laubach, Gang Su, Vlad Serbulea, Norbert Leitinger, Gorav Ailawadi, Gilbert R Upchurch
OBJECTIVE: Neutrophils promote experimental abdominal aortic aneurysm (AAA) formation via a mechanism that is independent from MMPs (matrix metalloproteinases). Recently, we reported a dominant role of IL (interleukin)-1β in the formation of murine experimental AAAs. Here, the hypothesis that IL-1β-induced neutrophil extracellular trap formation (NETosis) promotes AAA was tested. APPROACH AND RESULTS: NETs were identified through colocalized staining of neutrophil, Cit-H3 (citrullinated histone H3), and DNA, using immunohistochemistry...
February 22, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29471588/attenuated-effectiveness-of-tumor-necrosis-factor-inhibitors-for-anti-human-t-lymphotropic-virus-type-1-antibody-positive-rheumatoid-arthritis
#2
Takahisa Suzuki, Shoichi Fukui, Kunihiko Umekita, Junya Miyamoto, Masataka Umeda, Ayako Nishino, Akitomo Okada, Tomohiro Koga, Shin-Ya Kawashiri, Naoki Iwamoto, Kunihiro Ichinose, Mami Tamai, Keita Fujikawa, Toshiyuki Aramaki, Akinari Mizokami, Naoki Matsuoka, Yukitaka Ueki, Katsumi Eguchi, Shuntaro Sato, Toshihiko Hidaka, Tomoki Origuchi, Akihiko Okayama, Atsushi Kawakami, Hideki Nakamura
OBJECTIVES: We evaluated the effectiveness of tumor necrosis factor (TNF) inhibitors for the treatment of human T-lymphotropic virus type 1 (HTLV-I)-positive rheumatoid arthritis (RA) patients in an HTLV-I endemic area. METHODS: We conducted an observational study of 585 RA patients for whom TNF inhibitors were newly introduced as a first biologic disease-modifying antirheumatic drug (bDMARD) in an HTLV-I endemic area in southwestern Japan. RESULTS: Fifty patients (8...
February 22, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29466233/anti-streptavidin-igg-antibody-interference-in-anti-cyclic-citrullinated-peptide-ccp-igg-antibody-assays-is-a-rare-but-important-cause-of-false-positive-anti-ccp-results
#3
Mario Berth, Sofie Willaert, Carol De Ridder
BACKGROUND: The detection of anti-cyclic citrullinated peptide (anti-CCP) IgG antibodies in blood is mainly used for the diagnosis of rheumatoid arthritis. Falsely elevated anti-CCP IgG antibodies due to anti-streptavidin IgG antibodies were suspected in our laboratory. METHODS: In this study, we evaluated, in a standardized approach, the prevalence of anti-streptavidin IgG antibodies in a primary care setting and the effect of anti-streptavidin IgG antibodies on anti-CCP IgG assays from three different important commercial manufacturers (Abbott, Roche Diagnostics, Thermo Fisher Scientific)...
February 21, 2018: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/29460801/effects-of-glucocorticoids-on-serum-amino-acid-levels-during-cardiac-surgery-in-children
#4
Annelies van Zwol, Neelke B C Oosterloo, Cartijn T de Betue, Ad Bogers, Inge I de Liefde, Nicolaas E P Deutz, Koen F M Joosten
BACKGROUND AND AIMS: Children undergoing cardiac surgery with cardio pulmonary bypass often receive glucocorticoids to reduce the systemic inflammatory response. Glucocorticoids stimulate protein breakdown and increase amino acid availability. We studied whether glucocorticoid treatment influences the availability of amino acids, specifically those involved in the nitric oxide pathway. METHODS: We prospectively studied 49 children with congenital heart disease undergoing cardiac surgery...
February 2018: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/29459031/subcellular-targeting-of-nitric-oxide-synthases-mediated-by-their-n-terminal-motifs
#5
Carlos Costas-Insua, Javier Merino-Gracia, Clara Aicart-Ramos, Ignacio Rodríguez-Crespo
From a catalytic point of view, the three mammalian nitric oxide synthases (NOSs) function in an almost identical way. The N-terminal oxygenase domain catalyzes the conversion of l-arginine to l-citrulline plus ·NO in two sequential oxidation steps. Once l-arginine binds to the active site positioned above the heme moiety, two consecutive monooxygenation reactions take place. In the first step, l-arginine is hydroxylated to make Nω-hydroxy-l-arginine in a process that requires 1 molecule of NADPH and 1 molecule of O2 per mol of l-arginine reacted...
2018: Advances in Protein Chemistry and Structural Biology
https://www.readbyqxmd.com/read/29458275/structural-damage-and-inflammation-on-radiographs-or-magnetic-resonance-imaging-are-associated-with-cortical-interruptions-on-high-resolution-peripheral-quantitative-computed-tomography-a-study-in-finger-joints-of-patients-with-rheumatoid-arthritis-and-healthy
#6
A Scharmga, P Geusens, M Peters, J P van den Bergh, D Loeffen, T Schoonbrood, B van Rietbergen, D Vosse, R Weijers, A van Tubergen
OBJECTIVES: To study the relationship between structural damage and inflammatory features on magnetic resonance imaging (MRI) or radiography and other risk factors [anti-citrullinated protein antibody (ACPA) and/or rheumatoid factor (RF) seropositivity, hand dominance, disease duration] and the presence or number of cortical interruptions in finger joints on high-resolution peripheral quantitative computed tomography (HR-pQCT). METHOD: Finger joints of 38 healthy subjects and 39 patients with rheumatoid arthritis (RA) were examined through radiographs, MRI, and HR-pQCT...
February 20, 2018: Scandinavian Journal of Rheumatology
https://www.readbyqxmd.com/read/29455266/inflammatory-tenosynovitis-and-enthesitis-induced-by-immune-checkpoint-inhibitor-treatment
#7
Jun Inamo, Yuko Kaneko, Tsutomu Takeuchi
Reports about immune-related adverse events (IrAEs) induced by immune checkpoint inhibitors (ICIs) have been increasing. Although the importance of understanding joint involvement and myalgia as an IrAE has grown, little is known about its characteristics. The aim of this study was to investigate the incidence and clinical characteristics of articular IrAEs. We reviewed 133 patients who were treated with ICIs in our institution and referred to our rheumatologic. Among them, 2 (1.5%) developed arthritis during the use of anti-PD-1 inhibitor, and there was one patient with joint pain after anti-PD-L1 inhibitor who was referred to our department from another institution...
February 17, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29452423/anti-citrullinated-alpha-enolase-antibodies-interstitial-lung-disease-and-bone-erosion-in-rheumatoid-arthritis
#8
Alessia Alunno, Onelia Bistoni, Federico Pratesi, Giuliana Maria Concetta La Paglia, Ilaria Puxeddu, Paola Migliorini, Roberto Gerli
Objectives: RA is an articular chronic inflammatory disease that in a subgroup of patients can also present with extra-articular manifestations (EAMs). Despite intense investigation on this topic, reliable biomarkers for EAMs are lacking. In recent years several ACPAs, including those targeting anti-citrullinated alpha enolase peptide-1 (anti-CEP-1), have been identified in patients with RA. Data about the ability of anti-CEP-1 to predict the development of erosive disease are confliciting and no evidence concerning their possible association with EAMs in RA is currently available...
February 14, 2018: Rheumatology
https://www.readbyqxmd.com/read/29450408/effect-of-arginase-1-inhibition-on-the-incidence-of-autoimmune-diabetes-in-nod-mice
#9
Luis F Hernandez, Peter Buchwald, Midhat H Abdulreda
Metabolism of the amino acid L-arginine is implicated in many physiological and pathophysiological processes including autoimmune conditions such as type 1 diabetes (T1D). Alternate arginine metabolism through the citrulline-nitric oxide (NO) or the ornithine pathways can lead to proinflammatory or immune regulatory effects, respectively. In this report, we blocked the arginine-ornithine metabolic pathway by inhibiting the enzyme arginase-1 with Nω-hydroxy-nor-arginine (nor-NOHA) to make arginine more available to the alternate citrulline pathway for augmented NO production and increased incidence of autoimmune T1D in female non-obese diabetic (NOD) mice...
January 2018: Current Research in Diabetes & Obesity Journal
https://www.readbyqxmd.com/read/29428506/8-year-retrospective-analysis-of-intravenous-arginine-therapy-for-acute-metabolic-strokes-in-pediatric-mitochondrial-disease
#10
Rebecca D Ganetzky, Marni J Falk
BACKGROUND: Intravenous (IV) arginine has been reported to ameliorate acute metabolic stroke symptoms in adult patients with Mitochondrial Encephalopathy with Lactic Acidosis and Stroke-like Episodes (MELAS) syndrome, where its therapeutic benefit is postulated to result from arginine acting as a nitric oxide donor to reverse vasospasm. Further, reduced plasma arginine may occur in mitochondrial disease since the biosynthesis of arginine's precursor, citrulline, requires ATP. Metabolic strokes occur across a wide array of primary mitochondrial diseases having diverse molecular etiologies that are likely to share similar pathophysiologic mechanisms...
February 2, 2018: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/29415069/administration-of-l-arginine-plus-l-citrulline-or-l-citrulline-alone-successfully-retarded-endothelial-senescence
#11
Tomoe Tsuboi, Morihiko Maeda, Toshio Hayashi
L-citrulline and L-arginine supplementation has been shown to have several beneficial effects on the cardiovascular system. Nitric oxide (NO) protects against the progression of atherosclerosis and is synthesized by nitric oxide synthase (NOS), which converts L-arginine (L-Arg) into L-citrulline (L-Cit). Our previous study revealed that chronic administration of a combination of L-Cit and L- Arg has a better therapeutic effect on high cholesterol-induced atherosclerosis in rabbits. We investigated how L-Arg and L-Cit affect endothelial function, aging and atherosclerosis...
2018: PloS One
https://www.readbyqxmd.com/read/29408886/contribution-of-bacterial-pathogens-to-evoking-serological-disease-markers-and-aggravating-disease-activity-in-rheumatoid-arthritis
#12
Kuniaki Terato, Takaki Waritani, Richio Fukai, Hiroshi Shionoya, Hiroshi Itoh, Kou Katayama
Commensal bacteria and their pathogenic components in the gastrointestinal tract and oral cavity may play pathological roles in autoimmune diseases. To study the possible involvement of bacterial pathogens in autoimmune diseases, IgG and IgA antibodies against pathogenic components produced by three strains of commensal bacteria, Escherichia coli-lipopolysaccharide (E. coli-LPS), Porphyromonas gingivalis-LPS (Pg-LPS) and peptidoglycan polysaccharide (PG-PS) from Streptococcus pyogenes, were determined by an improved ELISA system for sera from two groups of patients with rheumatoid arthritis (RA), who met rapid radiographic progression (RRP) criteria and non-RRP, and compared to normal (NL) controls...
2018: PloS One
https://www.readbyqxmd.com/read/29408771/headache-in-mitochondrial-disorders
#13
REVIEW
Josef Finsterer, Sinda Zarrouk-Mahjoub
Headache is a prominent feature in mitochondrial disorders (MIDs) but no comprehensive overview is currently available. This review aims at summarising and discussing findings concerning type, frequency, pathogenesis, and treatment of headache in MIDs. The most frequent headache types in MIDs are migraine and migraine-like headache (MLH). MLH is classified as secondary headache. More rarely, tension-type headache, trigemino-autonomic headache, or different secondary headaches can be found. Migraine or MLH may manifest with or without aura...
January 26, 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29394491/impact-of-l-citrulline-supplementation-on-oxygen-uptake-kinetics-during-walking
#14
John Ashley, Youngdeok Kim, Joaquin U Gonzales
Supplementation with L-citrulline (Cit) has been shown to improve muscle oxygenation and oxygen uptake (VO2) kinetics during moderate-to-high intensity cycling in young men. The aim of this study was to test the hypothesis whether Cit would improve VO2 kinetics during walking in older and young adults. In a randomized, double-blind study, 26 (15 women, 11 men) adults between the ages of 20-35y (n = 15) and 64-86y (n = 11) completed 7 day periods of taking placebo and L-citrulline (6 g/day) in a crossover manner...
February 2, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29387991/smoking-and-susceptibility-to-rheumatoid-arthritis-in-a-swedish-population-based-case-control-study
#15
Anna Karin Hedström, Leszek Stawiarz, Lars Klareskog, Lars Alfredsson
Smoking is one of the most established risk factors for rheumatoid arthritis (RA). The aim of this study was to estimate how age at smoking debut, smoking cessation, duration, intensity, and cumulative dose of smoking influence the risk of developing anti-citrullinated peptide antibodies (ACPA) positive and ACPA negative RA. The present report is based on a Swedish population-based, case-control study with incident cases of RA (3655 cases, 5883 matched controls). Using logistic regression models, subjects with different smoking habits were compared regarding risk of developing the two variants of RA, by calculating odds ratios (OR) with 95% confidence intervals (CI)...
January 31, 2018: European Journal of Epidemiology
https://www.readbyqxmd.com/read/29368111/effects-of-taurine-supplementation-on-growth-in-low-birth-weight-infants-a-systematic-review-and-meta-analysis
#16
Shun-Li Cao, Hong Jiang, Shi-Ping Niu, Xiao-Hu Wang, Shan Du
OBJECTIVE: To summarize the available randomized controlled trials (RCTs) to evaluate the effect of taurine supplementation on growth in low birth weight infants (LBW). METHODS: PubMed, EmBase, and Cochrane Library electronic databases were searched for published articles through March 2017. Analysis was done to examine the effect of taurine supplementation on growth, and sensitivity analysis was performed by removing each individual study from meta-analysis. RESULTS: Results of 9 trials totaling 216 LBW infants in the present meta-analysis were collected and analyzed...
January 25, 2018: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/29341486/rheumatoid-arthritis-and-periodontal-disease-what-are-the-similarities-and-differences
#17
REVIEW
Rongbin Li, Cheng Tian, Arnold Postlethwaite, Yan Jiao, Franklin Garcia-Godoy, Debendra Pattanaik, Dongmei Wei, Weikuan Gu, Jianwei Li
Rheumatoid arthritis (RA) and periodontal disease (PD) are chronic inflammatory diseases that share similar osteoclasia, human leukocyte antigen-DR4 allelic genes and immunological profile, and characteristic cytokines. Smoking can contribute to more severe RA and PD; secretion of pro-inflammatory mediators destroys the soft synovial membrane and periodontium, respectively. Anti-citrullinated protein antibodies and anti-α-enolase antibody are characteristic of these two diseases. Some studies suggest that PD may be associated with RA...
December 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/29336646/anti-cyclic-citrullinated-peptide-antibodies-other-common-autoantibodies-and-smoking-as-risk-factors-for-lymphoma-in-patients-with-rheumatoid-arthritis
#18
E Baecklund, C Backlin, J Rönnelid, R Toes, Twj Huizinga, E Åhlin, J Askling, F H Hochberg, L Klareskog, J Kay, K E Smedby
OBJECTIVES: Patients with rheumatoid arthritis (RA) are at increased risk of lymphoma. There is no biomarker to indicate future lymphoma risk in RA and it is not known whether factors associated with an increased risk of RA also confer an increased risk of lymphoma. We investigated whether anti-cyclic citrullinated peptide (CCP) antibodies, other autoantibodies, and smoking, are associated with lymphoma development in RA. METHOD: From two population-based case-control studies, the Scandinavian Lymphoma Etiology (SCALE) study and the Epidemiological Investigation of Rheumatoid Arthritis (EIRA) I study, we identified lymphoma cases with a validated RA diagnosis (n = 50), to whom we matched study participants with RA but no lymphoma (n = 261), lymphoma but no RA (n = 257), and neither RA nor lymphoma (n = 233)...
January 16, 2018: Scandinavian Journal of Rheumatology
https://www.readbyqxmd.com/read/29336365/il1f7-gene-polymorphism-is-not-associated-with-rheumatoid-arthritis-susceptibility-in-the-northern-chinese-han-population-a-case-control-study
#19
Xiao-Ying Zhang, Yu Zuo, Chun Li, Xin Tu, Hu-Ji Xu, Jian-Ping Guo, Zhan-Guo Li, Rong Mu
BACKGROUND: Interleukin (IL)-37, also called IL1F7, is a natural inhibitor of inflammatory and immune responses. It is involved in the pathogenesis of rheumatoid arthritis (RA). This study aimed to investigate the role of IL1F7 gene polymorphism in RA susceptibility in a large cohort of patients. METHODS: Five selected single-nucleotide polymorphisms in IL1F7 genes (rs2723186, rs3811046, rs4241122, rs4364030, and rs4392270) were genotyped by TaqMan Allelic Discrimination in Northern Chinese Han population...
January 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29324871/citrullinated-histone-h3-as-a-novel-prognostic-blood-marker-in-patients-with-advanced-cancer
#20
Charlotte Thålin, Staffan Lundström, Cedric Seignez, Maud Daleskog, Annika Lundström, Peter Henriksson, Thomas Helleday, Mia Phillipson, Håkan Wallén, Mélanie Demers
Citrullinated histone H3 (H3Cit) is a central player in the neutrophil release of nuclear chromatin, known as neutrophil extracellular traps (NETs). NETs have been shown to elicit harmful effects on the host, and were recently proposed to promote tumor progression and spread. Here we report significant elevations of plasma H3Cit in patients with advanced cancer compared with age-matched healthy individuals. These elevations were specific to cancer patients as no increase was observed in severely ill and hospitalized patients with a higher non-malignant comorbidity...
2018: PloS One
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