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https://www.readbyqxmd.com/read/28792039/using-an-artificial-tryptophan-wire-in-cytochrome-c-peroxidase-for-oxidation-of-organic-substrates
#1
Mackenzie J Field, Rajneesh K Bains, Jeffrey J Warren
Lignolytic peroxidases use an electron transfer (ET) pathway that involves amino acid-mediated substrate oxidation at the surface of the protein rather than at an embedded heme site. In many of these peroxidases, redox catalysis takes place at a substrate accessible tyrosine or tryptophan (Trp) amino acid. Here, we describe new mutants of cytochrome c peroxidase (CcP) that were designed to incorporate a Trp-based "wire" that can move oxidizing equivalents from the heme to the protein surface. Three mutant CcP proteins were expressed and characterized: A193W, Y229W, and A193W/Y229W...
August 9, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28791645/measurement-of-epidermal-growth-factor-receptor-derived-signals-within-plasma-membrane-clathrin-structures
#2
Stefanie Lucarelli, Ralph Christian Delos Santos, Costin N Antonescu
The epidermal growth factor (EGF) receptor (EGFR) is an important regulator of cell growth, proliferation, survival, migration, and metabolism. EGF binding to EGFR triggers the activation of the receptor's intrinsic kinase activity, in turn eliciting the recruitment of many secondary signaling proteins and activation of downstream signals, such as the activation of phosphatidylinositol-3-kinase (PI3K) and Akt, a process requiring the phosphorylation of Gab1. While the identity of many signals that can be activated by EGFR has been revealed, how the spatiotemporal organization of EGFR signaling within cells controls receptor outcome remains poorly understood...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28782994/serum-mir-210-and-mir-155-expression-levels-as-novel-biomarkers-for-rheumatoid-arthritis-diagnosis
#3
R S Abdul-Maksoud, A M Sediq, Aaa Kattaia, Wsh Elsayed, N Ezzeldin, S M Abdel Galil, R A Ibrahem
BACKGROUND: MicroRNAs play a crucial role in the regulation of immune response. We hypothesised roles for serum miR-210 and miR-155 in the diagnosis of rheumatoid arthritis (RA) and relationships with the clinical and laboratory variables including erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), rheumatoid factor (RF), anti-cyclic citrullinated peptide (CCP) antibodies, tumour necrosis factor-alpha (TNF-α) and interleukin-1β (IL-1β). METHODS: MiR-210 and miR-155 levels were identified by real-time polymerase chain reaction (PCR)...
August 7, 2017: British Journal of Biomedical Science
https://www.readbyqxmd.com/read/28767674/versatile-ion-s5xl-sequencer-for-targeted-next-generation-sequencing-of-solid-tumors-in-a-clinical-laboratory
#4
Meenakshi Mehrotra, Dzifa Yawa Duose, Rajesh R Singh, Bedia A Barkoh, Jawad Manekia, Michael A Harmon, Keyur P Patel, Mark J Routbort, L Jeffrey Medeiros, Ignacio I Wistuba, Rajyalakshmi Luthra
BACKGROUND: Next generation sequencing based tumor tissue genotyping involves complex workflow and a relatively longer turnaround time. Semiconductor based next generation platforms varied from low throughput Ion PGM to high throughput Ion Proton and Ion S5XL sequencer. In this study, we compared Ion PGM and Ion Proton, with a new Ion S5XL NGS system for workflow scalability, analytical sensitivity and specificity, turnaround time and sequencing performance in a clinical laboratory. METHODS: Eighteen solid tumor samples positive for various mutations as detected previously by Ion PGM and Ion Proton were selected for study...
2017: PloS One
https://www.readbyqxmd.com/read/28751150/prevalence-of-glucose-intolerance-in-rheumatoid-arthritis-patients-at-a-tertiary-care-centre-in-haryana
#5
Rajesh Rajput, Anoop Dangi, Harpreet Singh
AIMS: Recent studies have shown increasing prevalence of dysglycemia in rheumatoid arthritis (RA) patients. The present study was planned to study the prevalence of pre-diabetes and diabetes in RA patients from a tertiary care centre in Haryana, India. METHODS: 150 diagnosed cases of rheumatoid arthritis which were on follow up in Rheumatology clinic from last one year and equal number of age, sex matched controls were recruited for the study. FPG, 2h plasma glucose level after 75g oral glucose tolerance test and HbA1c were estimated in all the subjects...
July 20, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28748515/tumor-necrosis-factor-%C3%AE-308-polymorphism-in-north-indian-rheumatoid-arthritis-patients-and-association-with-mrna-and-serum-tnf-%C3%AE
#6
Mohd Jahid, Rehan-Ul-Haq, Puja Kumari Jha, Diwesh Chawla, Rajnish Avasthi, Rafat Sultana Ahmed
Rheumatoid arthritis (RA) is a severely disabling chronic autoimmune disorder that leads to progressive inflammation of the joints and surrounding tissues. TNF-α, a potent proinflammatory cytokine, plays a pivotal role in the pathogenesis of RA. The endogenous formation of TNF-α may be influenced by TNF-α promoter polymorphisms. Hence, the present study was designed to explore any possible association between genetic polymorphism of TNF-α -308 G/A, messenger RNA (mRNA) expression, serum levels of TNF-α, and inflammatory markers in North Indian RA patients...
July 27, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28743354/analysis-of-four-serum-biomarkers-in-rheumatoid-arthritis-association-with-extra-articular-manifestations-in-patients-and-arthralgia-in-relatives
#7
Flávia R Nass, Thelma L Skare, Isabela Goeldner, Renato Nisihara, Iara T Messias-Reason, Shirley R R Utiyama
OBJECTIVES: To evaluate the frequency of four serum biomarkers in RA patients and their relatives and identify possible associations with clinical findings of the disease. METHODS: This was a transversal analytical study. Anti-cyclic citrullinated peptide (anti-CCP), anti-mutated citrullinated vimentin (anti-MCV) and IgA-rheumatoid factor (RF) were determined by ELISA and IgM-RF by latex agglutination in 210 RA patients, 198 relatives and 92 healthy controls from Southern Brazil...
July 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/28738945/disparities-in-the-care-of-differentiated-thyroid-cancer-in-the-united-states-exploring-the-national-cancer-database
#8
Kathryn Jaap, Rebekah Campbell, James Dove, Marcus Fluck, Marie Hunsinger, Jeffrey Wild, Tania Arora, Mohsen Shabahang, Joseph Blansfield
Differentiated thyroid cancer (DTC) treatment is multifaceted, and may be influenced by socioeconomic factors. The goal of this study is to examine disparities in DTC treatment. DTC patients from 1998 to 2012 were identified using the National Cancer Database. DTC was identified in 262,041 patients. The mean age was 48.2. The majority of patients (52%) received care at Comprehensive Community Cancer Programs (CCCPs). Total thyroidectomy was less common at Community Cancer Programs (CCPs) [odds ratio (OR): 0...
July 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/28738108/prevalence-course-and-associated-factors-of-pain-in-the-temporomandibular-joint-in-early-rheumatoid-arthritis-results-of-a-longitudinal-cohort-study
#9
Jessica P Chin Jen Sem, Marike van der Leeden, Corine M Visscher, Karin Britsemmer, Samina A Turk, Joost Dekker, Dirkjan van Schaardenburg, Frank Lobbezoo
AIMS: To assess the prevalence, 3-year course, and associated factors of temporomandibular joint (TMJ) pain in patients with newly diagnosed rheumatoid arthritis (RA). METHODS: A total of 264 patients with newly diagnosed RA were included. Patients were assessed after 3 months, 6 months, 9 months, 1 year, 1.5 years, 2 years, and 3 years. TMJ pain was scored by manual palpation, and the prevalence of TMJ pain was calculated at baseline and at all seven follow-up intervals during 3 years...
2017: Journal of Oral & Facial Pain and Headache
https://www.readbyqxmd.com/read/28727487/improving-care-with-a-portfolio-of-physician-led-cancer-quality-measures-at-an-academic-center
#10
Julie Bryar Porter, Eben Lloyd Rosenthal, Marcy Winget, Andrea Segura Smith, Sridhar Belavadi Seshadri, Yohan Vetteth, Eileen F Kiamanesh, Amogh Badwe, Ranjana H Advani, Mark K Buyyounouski, Steven Coutre, Frederick Dirbas, Vasu Divi, Oliver Dorigo, Kristen N Ganjoo, Laura J Johnston, Lawrence David Recht, Joseph B Shrager, Eila C Skinner, Susan M Swetter, Brendan C Visser, Douglas W Blayney
PURPOSE: Development and implementation of robust reporting processes to systematically provide quality data to care teams in a timely manner is challenging. National cancer quality measures are useful, but the manual data collection required is resource intensive, and reporting is delayed. We designed a largely automated measurement system with our multidisciplinary cancer care programs (CCPs) to identify, measure, and improve quality metrics that were meaningful to the care teams and their patients...
August 2017: Journal of Oncology Practice
https://www.readbyqxmd.com/read/28726037/can-a-collaborative-subspecialty-antimicrobial-stewardship-intervention-have-lasting-effects
#11
Kaushal B Shah, Ramzy H Rimawi, Mark A Mazer, Paul P Cook
OBJECTIVE: We previously demonstrated the benefit of direct, daily collaboration between infectious disease (ID) and critical care practitioners (CCP) on guideline adherence and antibiotic use in the medical intensive care unit (MICU). In this post-intervention review, we sought to establish whether the effect on antibiotic use and guideline adherence was sustainable. DESIGN: A retrospective review of 87 patients, admitted to the 24-bed MICU, was done 3 (n = 45) and 6 months (n = 42) after the intervention...
July 19, 2017: Infection
https://www.readbyqxmd.com/read/28713112/effect-of-casein-phosphopeptide-amorphous-calcium-phosphate-and-three-calcium-phosphate-on-enamel-microhardness
#12
En Hr Haghgou, Roza Haghgoo, Mohamad R Roholahi, Zahra Ghorbani
AIM: This study aims to investigate the effect of casein phos-phopeptide-amorphous calcium phosphate and three calcium phosphate (CPP-ACP and TCP) on increasing the microhardness of human enamel after induction of erosion. MATERIALS AND METHODS: A total of 26 healthy human-impacted third molar teeth were chosen, and their hardness measured using a microhardness testing machine. The samples were immersed in Coca Cola (pH = 4.7) for 8 minutes. Then, micro-hardness was measured again, and these samples were randomly divided into four groups (two control groups and two experimental groups)...
July 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28708862/anti-citrullinated-protein-antibody-positive-rheumatoid-arthritis-is-primarily-determined-by-rheumatoid-factor-titre-and-the-shared-epitope-rather-than-smoking-per-se
#13
Dan Murphy, Derek Mattey, David Hutchinson
OBJECTIVE: To analyse the relationship between rheumatoid factor (RF) titre, smoking and HLA-DRB1 alleles coding a "shared epitope" (SE) in relation to anti-citrullinated protein antibody (ACPA) positivity in rheumatoid arthritis (RA). METHODS: RA patients (n = 658) attending rheumatology clinics in Cornwall, UK (cohort 1) were stratified according to RF and ACPA titre, and smoking pack years at diagnosis. A further 409 RA patients from North Staffordshire, UK (cohort 2) were studied to confirm the relationship between RF levels, smoking and ACPA positivity in relation to SE status...
2017: PloS One
https://www.readbyqxmd.com/read/28702426/the-chemical-characteristics-and-immune-modulating-activity-of-polysaccharides-isolated-from-cold-brew-coffee
#14
Kwang-Soon Shin
To elucidate new biological ingredients in cold-brew coffee extracted with cold water, crude polysaccharide (CCP-0) was isolated by ethanol precipitation, and its immune-stimulating activities were assayed. CCP-0 mainly comprised galactose (53.6%), mannose (15.7%), arabinose (11.9%), and uronic acid (12.4%), suggesting that it might exist as a mixture of galactomannan and arabinogalactan. CCP-0 significantly increased cell proliferation on both murine peritoneal macrophages and splenocytes in a dose dependent manner...
June 2017: Preventive Nutrition and Food Science
https://www.readbyqxmd.com/read/28698517/the-plasticity-of-th17-cells-in-the-pathogenesis-of-rheumatoid-arthritis
#15
REVIEW
Shigeru Kotake, Toru Yago, Tsuyoshi Kobashigawa, Yuki Nanke
Helper T (Th) cells play an important role in the pathogenesis of autoimmune diseases, including rheumatoid arthritis (RA). It has been revealed that Th17 cells can shift to Th1 cells (i.e., "nonclassic Th1 cells"), which are reported to be more pathogenic than Th17 cells per se. Thus, the association of Th cells in the pathogenesis of autoimmune disease has become more complicated. We recently reported using peripheral blood from untreated and early-onset RA patients that the ratio of CD161+Th1 cells (i.e...
July 10, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28696311/escherichia-coli-cytochrome-c-peroxidase-is-a-respiratory-oxidase-that-enables-the-use-of-hydrogen-peroxide-as-a-terminal-electron-acceptor
#16
Maryam Khademian, James A Imlay
Microbial cytochrome c peroxidases (Ccp) have been studied for 75 years, but their physiological roles are unclear. Ccps are located in the periplasms of bacteria and the mitochondrial intermembrane spaces of fungi. In this study, Ccp is demonstrated to be a significant degrader of hydrogen peroxide in anoxic Escherichia coli Intriguingly, ccp transcription requires both the presence of H2O2 and the absence of O2 Experiments show that Ccp lacks enough activity to shield the cytoplasm from exogenous H2O2 However, it receives electrons from the quinone pool, and its flux rate approximates flow to other anaerobic electron acceptors...
July 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28696146/heat-resistance-of-histidine-decarboxylase-from-gram-negative-histamine-producing-bacteria-in-seafood
#17
K Bjornsdottir-Butler, F A Bencsath, S McCarthy, R A Benner
Precooking of tuna is a potential critical control point (CCP) in the commercial manufacturing of canned tuna. To assess the efficacy of precooking as a CCP, an understanding of the thermal properties of histamine-producing bacteria (HPB) and their histidine decarboxylase (HDC) enzymes is required. The thermal properties of many HPB have been determined, but the thermal resistances of the HDC enzymes are unknown. The purpose of this study was to determine the D- and z-values of selected HDC enzymes to evaluate the CCP of precooking during the canning process and provide scientific data to support U...
July 11, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28693070/-expression-of-annexin-a1-in-peripheral-blood-cells-of-na%C3%A3-ve-rheumatoid-arthritis-patients-and-its-influencing-factors
#18
Y F Mei, S M Dai, H N Jia, Z G Lin, Z Y Zhang
Objective: To explore the expression of Annexin a1 (AnxA1) mRNA in peripheral blood mononuclear cells (PBMC) from Naïve rheumatoid arthritis (RA) patients and healthy controls and to investigate its influencing factors. Methods: Thirty Naïve RA patients and 36 healthy controls were recruited from the First Affiliated Hospital of Harbin Medical University between May 2013 and January 2015.All RA patients were fulfilled the classification criteria of ACR in 1987.Clinical characteristics and laboratory indexes were collected...
July 4, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28692940/betulinic-acid-and-fluvastatin-exhibits-synergistic-effect-on-toll-like-receptor-4-mediated-anti-atherogenic-mechanism-in-type-ii-collagen-induced-arthritis
#19
Limi Elizabeth Mathew, Vrinda Rajagopal, Helen A
Cardiovascular disease (CVD) is a major problem during rheumatoid arthritis which leads to morbidity and mortality in arthritic patients. So the present study emphasizes combinatorial effect of Betulinic acid, a triterpenoid and fluvastatin, an HMG CoA reductase inhibitor on atherogenesis during arthritis. Arthritis was induced by bovine type II collagen dissolved in 0.01M acetic acid at a concentration of 4mg/mL and emulsified in equal volume of incomplete Freund's adjuvant. Betulinic acid (2mg/kg) and fluvastatin (5mg/kg) alone and in combination was administered orally from day 14 to 60...
September 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28691459/periodontal-microbioma-and-rheumatoid-arthritis-the-role-of-porhyromonas-gingivalis
#20
L Azzi, S Rania, R Vinci, F Spadari, F Croveri, C Scognamiglio, D Farronato, L Tettamanti, A Tagliabue, J Silvestre-Rangil, C Bellintani
Rheumatoid Arthritis is a disease, which can be described as an autoimmune response after molecular mimicry caused by infective agents. The current study aims at evaluating the correlation between Rhematoid Arthritis (RA) and Periodontal Disease (PD), with special attention to the microbioma detected in the gums. Thirty-four patients with RD were recruited into the current study. Among rheumatic parameters, Rheumatoid Factor (RF), anti-citrullinated protein antibody (CCP), HLA-BDR1 and DAS28 were collected...
April 2017: Journal of Biological Regulators and Homeostatic Agents
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