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Serum citrulline

Monica G Ferrini, Eduardo Garcia, Andrea Abraham, Jorge N Artaza, Sabine Nguyen, Jacob Rajfer
INTRODUCTION: COMP-4 is a natural compound-based dietary supplement consisting of the combination of ginger, Paullinia cupana, muira puama and l-citrulline, which when given long-term has been shown in the aged rat to a) upregulate iNOS in the penile smooth muscle cells (SMC), b) reverse the corporal SMC apoptosis and fibrosis associated with corporal veno-occlusive dysfunction (CVOD), and c) improve resulting erectile function. To elucidate the mechanism of how COMP-4 and its individual components modulate the iNOS-cGMP pathway, an in vitro study was conducted using a rat corporal primary SMC culture to determine its effect on NOS, soluble guanylate cyclase (sGC), cGMP and the phosphodiesterase 5 enzyme (PDE5)...
March 15, 2018: Nitric Oxide: Biology and Chemistry
Li Yunchun, Wang Yue, Fang Zhong Jun, Su Qizhu, Ding Liumei
OBJECTIVES: To investigate the serum level of Myeloid-Related Protein 8/14 complex (MRP8/14) and to predict and monitor the response to biologic treatment in rheumatoid arthritis (RA) patients. 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), rheumatoid factors (RF), anti-cyclic citrullinated protein antibodies (anti-CCP), and serum concentrations of MRP8/14 protein complexes (myeloid-related proteins, MRP8/14) were measured at baseline, and weeks 4 and 12 (after initiation of treatment)...
January 2018: Annals of Clinical and Laboratory Science
K H Lee, L Cavanaugh, H Leung, F Yan, Z Ahmadi, B H Chong, F Passam
INTRODUCTION: Neutrophil extracellular traps (NETs) are networks of extracellular fibres produced from neutrophil DNA with a pathogenic role in infection, thrombosis and other conditions. Reliable assays for measuring NETs are desirable as novel treatments targeting NETs are being explored for the treatment of these conditions. We compare a whole blood flow cytometry method with serum assays to measure NETs-associated markers in patients with sepsis and thrombosis. METHODS: Patients with deep venous thrombosis (n = 25), sepsis (n = 21) and healthy controls (n = 23) were included in the study...
March 9, 2018: International Journal of Laboratory Hematology
Hadi Bazzazi, Mehrdad Aghaei, Ali Memarian, Hossein Asgarian-Omran, Nasser Behnampour, Yaghoub Yazdani
The Th17, Th1 and dual Th17/Th1 cells are important players in rheumatoid arthritis (RA) disease. To assess their roles, the frequency and impact of these cells were investigated in patients with different disease activity. In 14 new cases and 41 established RA patients in comparison with 22 healthy controls, the percentages of Th17, Th1 and dual Th17/Th1 cells were determined by flow-cytometry and their correlations were investigated with disease activity score (DAS28). Moreover, serum levels of IL-6 and IL-17 as inducer and functional cytokines for Th17 were investigated...
February 2018: Iranian Journal of Allergy, Asthma, and Immunology
Brenna S Fullerton, Cristine S Velazco, Charles R Hong, Alexandra N Carey, Tom Jaksic
PURPOSE: Severe combined immunodeficiency (SCID) screening by T-cell receptor excision circles (TREC) has been part of Massachusetts routine newborn screening since 2009. Tetratricopeptide repeat domain 7A gene (TTC7A) mutations responsible for hereditary multiple intestinal atresia with combined immunodeficiency (MIA-CID) were also recently identified. We reviewed newborn SCID screening among infants with intestinal failure and correlated results with patient characteristics and outcomes...
January 2018: JPEN. Journal of Parenteral and Enteral Nutrition
Robby Engelmann, Sven Nekarda, Daniela Kuthning, Christian Kneitz, Brigitte Müller-Hilke
The treatment options for patients suffering from rheumatoid arthritis expanded over the last years. However, reliable biomarkers to guide therapy decisions are still warranted. Therefore, we here evaluated the value of antibodies against citrullinated peptide antigens (ACPA) IgG subclasses and peripheral blood antigen presenting cells as biomarkers to monitor and predict therapy response of patients with rheumatoid arthritis. Thirty-four ACPA-positive RA patients were enrolled and monitored for 3 months after therapy begin...
March 3, 2018: Clinical Rheumatology
Omnia Ahmed Mohamed Abed El-Gaphar, Amira M Abo-Youssef, Gouda Kamel Halal
Levetiracetam (LEV), a novel anti-epileptic drug that has been demonstrated with an anti-inflammatory effect, but the exact mechanisms of its action remain to be fully defined. The present study aimed to evaluate the possible effects of LEV on lipopolysaccharides (LPS)-induced Janus kinase-signal transducers and activators of transcription (JAK/STAT) as well as toll-like receptor 4 (TLR4)/ mitogen activated protein kinase (MAPK) signaling pathways activation in adjuvant induced arthritis (AIA). Rats were allocated into normal control, three arthritic control groups: Complete Freund's Adjuvant (CFA) (0...
March 1, 2018: European Journal of Pharmacology
Emma C de Moel, Veerle F A M Derksen, Gerrie Stoeken, Leendert A Trouw, Holger Bang, Robbert J Goekoop, Irene Speyer, Tom W J Huizinga, Cornelia F Allaart, René E M Toes, Diane van der Woude
BACKGROUND: The autoantibody profile of seropositive rheumatoid arthritis (RA) is very diverse and consists of various isotypes and antibodies to multiple post-translational modifications. It is yet unknown whether this varying breadth of the autoantibody profile is associated with treatment outcomes. Therefore, we investigated whether the composition of the autoantibody profile in RA, as a marker of the underlying immunopathology, influences initial and long-term treatment outcomes. METHODS: In serum from 399 seropositive patients with RA in the IMPROVED study, drawn at baseline and at the moment of drug tapering, we measured IgG, IgM, and IgA isotypes for anti-cyclic citrullinated peptide-2 and anti-carbamylated protein antibodies, IgM and IgA rheumatoid factor, and reactivity against four citrullinated and two acetylated peptides (anti-modified protein antibodies (AMPAs))...
February 26, 2018: Arthritis Research & Therapy
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
Akihisa Haraguchi, Hisakata Yamada, Masakazu Kondo, Ken Okazaki, Jun-Ichi Fukushi, Akiko Oyamada, Yasunobu Yoshikai, Yasuharu Nakashima
OBJECTIVES: Since the presence of IgM antibodies is a hallmark of ongoing immune response, we aimed to identify immunologically active rheumatoid arthritis (RA) patients by detecting IgM anti-citrullinated protein antibody (ACPA) levels. METHODS: IgM ACPA levels were determined in the serum of 176 RA patients by enzyme-linked immunosorbent assay, in which parameters of reactivity against citrullinated and non-citrullinated peptides were compared to ensure the specificity...
February 14, 2018: Clinical and Experimental Rheumatology
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
Yang Liu, Hongyan Wen
OBJECTIVE: To determine if patients with rheumatoid arthritis (RA) are at risk of vitamin D deficiency and whether the levels of vitamin D are correlated with clinical parameters in RA. METHODS: A total of 280 treatment-naïve RA patients, and 140 age- and sex-matched healthy volunteers were enrolled. Serum levels of 1,25-dihydroxycholecalciferol (1,25(OH)2 D3 ), the active form of vitamin D, were measured by enzyme-linked immunosorbent assay (ELISA). Concentrations of 1,25(OH)2 D3 less than 25 ng/mL were defined as insufficient...
February 19, 2018: Zeitschrift Für Rheumatologie
Weifeng Tan, Jingquan He, Junliang Deng, Xinwei Yang, Longjiu Cui, Rongzheng Ran, Guangwei Du, Xiaoqing Jiang
Hepatocellular carcinoma with bile duct tumor thrombus (BDTT) is a malignant disease. The most commonly used diagnosis methods for BDTT are MRCP/ERCP, ultrasonic diagnosis or CT scan. However, BDTT is often misdiagnosed as other bile duct diseases, such as extrahepatic cholangiocarcinoma (EHCC), choledochal cyst (Cyst) and common bile duct stone (Stone). Diagnostic methods, which are more accurate and less destructive, are urgently needed. In this paper, we analyzed the small molecule metabolites in the serum of BDTT, Stone, Cyst and EHCC patients and normal people using untargeted GC-MS, and identified 21 metabolites that show different levels among different samples...
February 19, 2018: Scientific Reports
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
Ashish Gupta, Deepak Kumar
Identification of NMR-based metabolic indexes is limited by the deleterious effects of copious proteins and lipoproteins in the serum that accentuate the need for advance and high-throughput method. We tried to explore the use of a novel filtration (2KDa molecular weight cut-off) approach to remove the proteins from serum following use of less sample volume (only 150 μL of filtered serum), combining an array of 1D/2D NMR experiments (at 800 MHz spectrometer), spiking experiments with standard compounds, and validated by mass spectrometry...
January 9, 2018: Journal of Pharmaceutical and Biomedical Analysis
Katarzyna Olszewska, Janusz Ksiazyk, Dariusz Kozlowski, Magdalena Pajdowska, Malgorzata Janusz, Maciej Jaworski
AIM: Children with ultra-short bowel syndrome (USBS) have not been extensively studied to date because the condition is rare. The aim of the study was to assess the nutritional status of children with USBS receiving home parenteral nutrition, by using citrulline serum concentration and cholestasis. METHODS: We studied 17 patients with USBS, with a median age of 6.6 years and median duration of parenteral nutrition of 6.6 years. The study was carried out at The Children's Memorial Health Institute, Warsaw, from January 2014 to January 2015...
February 6, 2018: Acta Paediatrica
BiBi Fatemeh Nobakht Mothlagh Ghoochani, Rasoul Aliannejad, Afsaneh Arefi Oskouie, Mostafa Rezaei-Tavirani, Shiva Kalantari, Mohammad Taghi Naseri, Alireza Akbarzadeh Baghban, Hadi Parastar, Ghazaleh Aliakbarzadeh
Objectives: This study aims to evaluate combined proton nuclear magnetic resonance (1H NMR) spectroscopy and gas chromatography-mass spectrometry (GC-MS) metabolic profiling approaches, for discriminating between mustard airway diseases (MADs) and healthy controls and for providing biochemical information on this disease. Materials and Methods: In the present study, analysis of serum samples collected from 17 MAD subjects and 12 healthy controls was performed using NMR...
January 2018: Iranian Journal of Basic Medical Sciences
Ryuji Komine, Keisuke Minamimura, Akihiro Watanabe, Atushi Shimizu, Kazuhiko Mori, Toru Hirata, Takashi Kobayashi, Sotaro Akatsuka
BACKGROUND: Adult-onset type II citurullinemia is an autosomal recessive disorder characterized by recurrent encephalopathy with hyperammonemia resulting from high plasma citrulline and ammonium levels. This report describes a rare case of adult-onset type II citurullinemia that occurred in a patient who only had the heterozygote mutation, and had never presented with any symptoms before surgery. CASE PRESENTATION: A 56-year-old man underwent a total gastrectomy for stomach cancer...
January 25, 2018: Surgical Case Reports
Eszter Szarka, Petra Aradi, Krisztina Huber, Judit Pozsgay, Lili Végh, Anna Magyar, Gergő Gyulai, György Nagy, Bernadette Rojkovich, Éva Kiss, Ferenc Hudecz, Gabriella Sármay
BACKGROUND: In rheumatoid arthritis (RA), anti-citrullinated protein/peptide antibodies (ACPAs) are responsible for disease onset and progression, however, our knowledge is limited on ligand binding affinities of autoantibodies with different citrulline-peptide specificity. METHODS: Citrulline-peptide-specific ACPA IgGs were affinity purified and tested by ELISA. Binding affinities of ACPA IgGs and serum antibodies were compared by surface plasmon resonance (SPR) analysis...
January 22, 2018: International Journal of Molecular Sciences
Ahmed Gaafar Ahmed Gaafar, Basim Anwar Shehata Messiha, Ahmed Mohamed Labib Abdelkafy
Signaling pathways are interesting fields of study of pathogenesis and treatment trials. We elucidated the possible protective effects of nicorandil (15mg/kg/day) and theophylline (20mg/kg/day) on experimentally-induced RA, focusing on the role of JAK (Janus Kinase) / STAT (Signal Transducer and Activator of Transcription) / RANKL (Receptor Activator of Nuclear factor-Kappa B Ligand) / cytokine signaling pathway. Four sets of experiments were performed. First, effect of test agents on normal animals was evaluated...
January 11, 2018: European Journal of Pharmacology
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