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https://www.readbyqxmd.com/read/28089618/24-hour-protein-arginine-and-citrulline-metabolism-in-fed-critically-ill-children-a-stable-isotope-tracer-study
#1
Carlijn T I de Betue, Xiomara C Garcia Casal, Dick A van Waardenburg, Stephen M Schexnayder, Koen F M Joosten, Nicolaas E P Deutz, Marielle P K J Engelen
BACKGROUND & AIMS: The reference method to study protein and arginine metabolism in critically ill children is measuring plasma amino acid appearances with stable isotopes during a short (4-8 h) time period and extrapolate results to 24-h. However, 24-h measurements may be variable due to critical illness related factors and a circadian rhythm could be present. Since only short duration stable isotope studies in critically ill children have been conducted before, the aim of this study was to investigate 24-h appearance of specific amino acids representing protein and arginine metabolism, with stable isotope techniques in continuously fed critically ill children...
January 4, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28079511/circulating-carotenoids-and-subsequent-risk-of-rheumatoid-arthritis-in-women
#2
Yang Hu, Jing Cui, Jeffrey A Sparks, Susan Malspeis, Karen H Costenbader, Elizabeth W Karlson, Bing Lu
OBJECTIVES: The aim of the present study was to examine the associations between circulating carotenoids and future risk of rheumatoid arthritis (RA). METHODS: We conducted a nested case-control study consisting of 227 incident RA cases and 671 matched controls with prospectively measured plasma carotenoids (α-carotene, β-carotene, β-cryptoxanthin, lycopene and lutein/zeaxanthin) levels in the Nurses' Health Study (NHS) and Nurses' Health Study II (NHS II). Each incident RA case was matched with 3 healthy controls...
January 4, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28058964/fasting-and-postprandial-plasma-citrulline-and-the-correlation-to-intestinal-function-evaluated-by-72-hour-metabolic-balance-studies-in-short-bowel-jejunostomy-patients-with-intestinal-failure
#3
Hilde Fjermestad, Mark Hvistendahl, Palle Bekker Jeppesen
BACKGROUND: Fasting plasma citrulline (p-citrulline) is a marker of functional enterocyte mass. However, the optimal timing of measurement in relation to meals has yet to be clarified. Furthermore, p-citrulline has been proposed to be a surrogate marker for small bowel length and intestinal absorption parameters in short bowel syndrome patients with intestinal failure (SBS-IF). MATERIALS AND METHODS: Eight patients with SBS-IF and 8 healthy controls (HCs) were given a standardized mixed test meal, and p-citrulline was measured 15 minutes before and 60, 120, and 180 minutes after completion of the meal...
January 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28036059/methionine-and-choline-supply-during-the-periparturient-period-alter-plasma-amino-acid-and-one-carbon-metabolism-profiles-to-various-extents-potential-role-in-hepatic-metabolism-and-antioxidant-status
#4
Zheng Zhou, Mario Vailati-Riboni, Daniel N Luchini, Juan J Loor
The objective of this study was to profile plasma amino acids (AA) and derivatives of their metabolism during the periparturient period in response to supplemental rumen-protected methionine (MET) or rumen-protected choline (CHOL). Forty cows were fed from -21 through 30 days around parturition in a 2 × 2 factorial design a diet containing MET or CHOL. MET supply led to greater circulating methionine and proportion of methionine in the essential AA pool, total AA, and total sulfur-containing compounds. Lysine in total AA also was greater in these cows, indicating a better overall AA profile...
December 29, 2016: Nutrients
https://www.readbyqxmd.com/read/28034972/the-association-between-musculoskeletal-pain-and-circulating-ornithine-a-population-based-study
#5
Pekka Mäntyselkä, Toni Ali-Sisto, Hannu Kautiainen, Leo Niskanen, Heimo Viinamäki, Vidya Velagapudi, Soili M Lehto
OBJECTIVE:  Based on several previous clinical studies, we hypothesized that ornithine levels are different among subjects with persistent musculoskeletal pain compared with other subjects in the population. DESIGN:  The study sample consisted of 221 adults with nonpersistent pain, 76 with persistent pain, and 61 with no pain. Concentrations of glutamic acid, ornithine, citrulline, arginine, proline, and spermidine were analyzed using a mass spectrometer. SETTING:  Lapinlahti municipality in Finland...
December 29, 2016: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28029744/high-titer-rheumatoid-arthritis-antibodies-preferentially-bind-fibrinogen-citrullinated-by-peptidyl-arginine-deiminase-4
#6
Nathalie E Blachère, Salina Parveen, Mayu O Frank, Brian D Dill, Henrik Molina, Dana E Orange
OBJECTIVE: Most patients with rheumatoid arthritis (RA) harbor antibodies to citrullinated autoantigens, such as citrullinated fibrinogen. Two isoforms of peptidyl arginine deiminase (PAD), PAD2 and PAD4, which catalyze citrullination with different substrate specificities, can be detected in RA synovium. This study was undertaken to determine whether RA patient antibodies preferentially bind PAD2 or PAD4 citrullinated fibrinogen. METHODS: RA patient and normal donor plasma was tested for binding to PAD2 or PAD4 citrullinated fibrinogen, native fibrinogen, or citrullinated fibrinogen peptides in various dilutions by ELISA and Western blot...
December 28, 2016: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28028684/are-obesity-acpas-and-periodontitis-conditions-that-influence-the-risk-of-developing-rheumatoid-arthritis-in-first-degree-relatives
#7
Sonia Unriza-Puin, Wilson Bautista-Molano, Gloria I Lafaurie, Rafael Valle-Oñate, Philippe Chalem, Lorena Chila-Moreno, Juan Manuel Bello-Gualtero, Consuelo Romero-Sánchez
The aim of this study was to investigate the body mass index (BMI), anti-citrullinated protein antibodies (ACPAs) status and the presence of periodontitis and IgG-1/IgG-2 antibodies against Porphyromonas gingivalis (Pg) in the first-degree relatives (FDRs) of rheumatoid arthritis (RA) patients and compare these variables with a control group of healthy individuals from the general population. In total, 100 FDR individuals and 200 healthy controls matched by age and gender were included. Rheumatologic and periodontal assessment was performed, and the presence of ACPAs and anti-P...
December 28, 2016: Clinical Rheumatology
https://www.readbyqxmd.com/read/28002590/association-between-174g-c-and-572g-c-interleukin-6-gene-polymorphisms-and-severe-radiographic-damage-to-the-hands-of-mexican-patients-with-rheumatoid-arthritis-a-preliminary-report
#8
S A Zavaleta-Muñiz, L Gonzalez-Lopez, J D Murillo-Vazquez, A M Saldaña-Cruz, M L Vazquez-Villegas, B T Martín-Márquez, J C Vasquez-Jimenez, F Sandoval-Garcia, A J Ruiz-Padilla, N S Fajardo-Robledo, J M Ponce-Guarneros, A D Rocha-Muñoz, M F Alcaraz-Lopez, D Cardona-Müller, S E Totsuka-Sutto, E D Rubio-Arellano, J I Gamez-Nava
Several interleukin 6 gene (IL6) polymorphisms are implicated in susceptibility to rheumatoid arthritis (RA). It has not yet been established with certainty if these polymorphisms are associated with the severe radiographic damage observed in some RA patients, particularly those with the development of joint bone ankylosis (JBA). The objective of the present study was to evaluate the association between severe radiographic damage in hands and the -174G/C and -572G/C IL6 polymorphisms in Mexican Mestizo people with RA...
December 19, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27994093/association-of-anti-citrullinated-protein-or-peptide-antibodies-with-left-ventricular-structure-and-function-in-rheumatoid-arthritis
#9
Laura Geraldino-Pardilla, Cesare Russo, Jeremy Sokolove, William H Robinson, Afshin Zartoshti, Jenny Van Eyk, Justyna Fert-Bober, Joao Lima, Jon T Giles, Joan M Bathon
OBJECTIVE: High levels of ACPAs in RA are associated with more severe arthritis and worse prognosis. However, the role of ACPAs in mediating the increased risk of heart failure in RA remains undefined. We examined whether specific ACPAs were associated with subclinical left ventricular (LV) phenotypes that presage heart failure. METHODS: Sera from RA patients without clinical cardiovascular disease were assayed for specific ACPAs using a custom Bio-Plex bead assay, and their cross-sectional associations with cardiac magnetic resonance-derived LV measures were evaluated...
December 19, 2016: Rheumatology
https://www.readbyqxmd.com/read/27987497/-significance-of-different-t-follicular-helper-subsets-in-rheumatoid-arthritis
#10
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/27987495/-significance-of-v-raf-murine-sarcoma-viral-oncogene-homologue-b1-in-rheumatoid-arthritis
#11
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
https://www.readbyqxmd.com/read/27987493/-significance-of-antibodies-to-the-citrullinated-glucose-6-phosphate-isomerase-peptides-in-rheumatoid-arthritis
#12
D Wu, L Sun, C H Li, L Yang, J X Zhao, X Y Liu
OBJECTIVE: To detect the anti-citrullinated glucose-6-phosphate isomerase (GPI) 70-88 peptide antibody(anti-C-GPI70-88 antibody),anti-citrullinated GPI 435-453 peptide antibody(anti-C-GPI435-453 antibody), anti-GPI 70-88 peptide antibody(anti-GPI70-88 antibody) and anti-GPI 435-453 peptide antibody(anti-GPI435-453 antibody) in the serum of rheumatoid arthritis(RA) patients,and examine the diagnostic values of the anti-C-GPI peptide antibodies in RA. METHODS: The anti-C-GPI70-88 antibody, anti-C-GPI435-453 antibody, anti-GPI70-88 antibody and anti-GPI435-453 antibody were detected by enzyme-linked immunosorbent assay (ELISA) in 191 RA patients, 129 other rheumatic diseases and 74 healthy controls...
December 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/27987492/-significance-and-diagnostic-value-of-synovial-fluid-anti-cyclic-citrullinated-peptide-antibody-and-anti-mutated-citrullinated-vimentin-antibodies-in-patients-with-serum-negative-rheumatoid-arthritis
#13
S J Qu, H Ye, R L Jia, Z G Li
OBJECTIVE: To explore the significance of synovial fluid (SF) anti-cyclic citrullinated peptide (CCP) antibodies and anti-mutated citrullinated vimentin (MCV) antibodies in the diagnosis of serum negative rheumatoid arthritis (SNRA). METHODS: Enzyme linked immunosorbent assay (ELISA) method was apllied in the detection of two groups of patients with knee joint fluid resistance against CCP antibody and antibody of MCV, the experimental group to SNRA patients, a total of 29 cases, and the control for patients with osteoarthritis (OA), a total of 28 cases, and clinical manifestations and laboratory parameters of the two groups were collected...
December 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/27973973/pentraxin-3-in-serum-and-synovial-fluid-of-patients-with-rheumatoid-arthritis-with-and-without-autoantibodies
#14
T Weitoft, A Larsson, T Saxne, V A Manivel, J Lysholm, A Knight, J Rönnelid
OBJECTIVES: Pentraxin 3 (PTX3) is a locally produced multifunctional protein involved in inflammation, matrix deposition, and immunity. As patients with seropositive rheumatoid arthritis (RA) have a more severe disease course and higher risk of joint destruction than seronegative patients, the aim of the present study was to examine differences in PTX3 in synovial fluid (SF) (and serum) in seropositive compared to seronegative RA, and other local markers of inflammation and destruction...
December 15, 2016: Scandinavian Journal of Rheumatology
https://www.readbyqxmd.com/read/27943654/hla-drb1-shared-epitope-alleles-in-patients-with-rheumatoid-arthritis-relation-to-autoantibodies-and-disease-severity-in-a-south-indian-population
#15
Vasanth Konda Mohan, Nalini Ganesan, Rajasekhar Gopalakrishnan, Vettriselvi Venkatesan
AIM: To investigate the presence of the 'shared epitope' (SE) in the HLA-DRB1 alleles in patients with RA and to ascertain the frequency of the HLA-DRB1 alleles with autoantibodies (anti-cyclic citrullinated peptide [anti-CCP] rheumatoid factor [RF]) and disease severity. METHODS: A total of 200 RA patients and 200 apparently healthy subjects participated in the study. HLA-DRB1 were genotyped using polymerase chain reaction with sequence-specific primer (PCR-SSP)...
December 10, 2016: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/27939527/nitric-oxide-production-by-peritoneal-macrophages-from-aged-rats-a-short-term-and-direct-modulation-by-citrulline
#16
Charlotte Breuillard, Emmanuel Curis, Servane Le Plénier, Luc Cynober, Christophe Moinard
Citrulline has anti-inflammatory properties and exerts beneficial effects on various impaired functions in aging. However, there are few data on citrulline action on immune function in aged populations. The objective of the study was to evaluate citrulline ability, after in vivo and in vitro administration, to modulate macrophage functions in aged rats and the possible pathways involved. Twenty-one-month-old Sprague-Dawley rats (n = 27) received a citrulline supplementation at 5 g/kg/d for 5 days, or an isonitrogenous diet, and peritoneal macrophages were cultured with or without LPS...
December 7, 2016: Biochimie
https://www.readbyqxmd.com/read/27926664/absence-of-serological-rheumatoid-arthritis-biomarkers-in-inflammatory-bowel-disease-patients-with-arthropathies
#17
Sanne J H Van Erp, Marije K Verheul, E W Nivine Levarht, Johan J van der Reijden, Désirée van der Heijde, Floris A van Gaalen, Daniel W Hommes, Gary L Norman, Zakera Shums, Michael Mahler, Hein W Verspaget, Leendert A Trouw, Andrea E van der Meulen-de Jong
OBJECTIVE: Biomarkers that are associated with future progression to rheumatoid arthritis (RA) and joint destruction have been discovered previously in patients with arthralgia. The present study examined these RA biomarkers in inflammatory bowel disease (IBD) patients with arthropathies. PATIENTS AND METHODS: Sera from 155 IBD patients with and 99 IBD patients without arthropathies were analyzed for immunoglobulin (Ig) M rheumatoid factor (RF), IgA-RF, anti-cyclic citrullinated peptide 2, anti-cyclic citrullinated peptide 3...
December 6, 2016: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/27912794/a-genetic-risk-score-composed-of-rheumatoid-arthritis-risk-alleles-hla-drb1-haplotypes-and-response-to-tnfi-therapy-results-from-a-swedish-cohort-study
#18
Xia Jiang, Johan Askling, Saedis Saevarsdottir, Leonid Padyukov, Lars Alfredsson, Sebastien Viatte, Thomas Frisell
BACKGROUND: To prevent debilitating and irreversible joint damage, rheumatoid arthritis (RA) is often treated with tumor necrosis factor inhibitor (TNFi), but many patients do not respond to this costly therapy. Few predictors for response are known, and it has been proposed that genetic factors which influence the development of RA may also influence disease severity and response to therapy. Several previous studies have attempted to confirm this but results remain inconclusive. We expand on previous studies by including more RA risk alleles, and maximize power by combining them into a genetic risk score...
December 3, 2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27912793/antibodies-against-carbamylated-proteins-and-cyclic-citrullinated-peptides-in-systemic-lupus-erythematosus-results-from-two-well-defined-european-cohorts
#19
Michael Ziegelasch, Myrthe A M van Delft, Philip Wallin, Thomas Skogh, César Magro-Checa, Gerda M Steup-Beekman, Leendert A Trouw, Alf Kastbom, Christopher Sjöwall
BACKGROUND: Articular manifestations are common in systemic lupus erythematosus (SLE) whereas erosive disease is not. Antibodies to cyclic citrullinated peptide (anti-CCP) are citrulline-dependent in rheumatoid arthritis (RA), whereas the opposite is suggested in SLE, as reactivity with cyclic arginine peptide (CAP) is typically present. Antibodies targeting carbamylated proteins (anti-CarP) may occur in anti-CCP/rheumatoid factor (RF)-negative cases long before clinical onset of RA. We analysed these antibody specificities in sera from European patients with SLE in relation to phenotypes, smoking habits and imaging data...
December 3, 2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27906052/antibody-responses-to-de-novo-identified-citrullinated-fibrinogen-peptides-in-rheumatoid-arthritis-and-visualization-of-the-corresponding-b-cells
#20
Vijay Joshua, Loes Schobers, Philip J Titcombe, Lena Israelsson, Johan Rönnelid, Monika Hansson, Anca I Catrina, Ger J M Pruijn, Vivianne Malmström
BACKGROUND: Antibodies against citrullinated proteins (ACPA) are common in patients with rheumatoid arthritis (RA). ACPA can appear before disease onset and target many self-antigens. Citrullinated fibrin/fibrinogen represents a classical ACPA target antigen, and mass spectrometry of RA synovial fluid reveals elevated citrullinated (cit) fibrinogen (Fib) peptides compared to non-RA controls. We investigated the extent to which these less-studied peptides represent autoantibody targets and sought to visualize the corresponding cit-Fib-reactive B cells in RA patients...
December 1, 2016: Arthritis Research & Therapy
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