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https://www.readbyqxmd.com/read/29217191/tnf-%C3%AE-induces-expression-of-the-circadian-clock-gene-bmal1-via-dual-calcium-dependent-pathways-in-rheumatoid-synovial-cells
#1
Kohsuke Yoshida, Ayako Nakai, Kenta Kaneshiro, Naonori Hashimoto, Kohjin Suzuki, Koto Uchida, Teppei Hashimoto, Yoshiko Kawasaki, Koji Tateishi, Natsuko Nakagawa, Nao Shibanuma, Yoshitada Sakai, Akira Hashiramoto
Tumor necrosis factor (TNF)-α is responsible for expressions of several clock genes and affects joint symptoms of rheumatoid arthritis (RA) with diurnal fluctuation. We tried to determine the mechanism involved in over-expression of Bmal1, induced by TNF-α, in primary cultured rheumatoid synovial cells. Cells were incubated with intra-cellular Ca2+ chelator BAPTA-AM, calcineurin inhibitor FK506 and p300/CBP (CREB binding protein) inhibitor C646, respectively, or transfected with p300 and CBP small interfering RNA (siRNA) before stimulation with TNF-α...
December 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29205875/a-case-report-of-basic-calcium-phosphate-mimicking-septic-arthritis
#2
Queenie Luu, Siroos Nasibi, Praneal Sharma, Andrew Bonura, David Massasso
We report a case of a 53-year-old man who presented with a diagnostic dilemma mimicking septic arthritis. It is important to consider the diagnosis of calcific peri-arthritis clinically and recognize the hallmarks on radiograph and magnetic resonance imaging as this disease process resolves completely with conservative management like in our patient, and does not require operative intervention.
December 4, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/29196182/peripheral-5-ht3-mediates-mirror-image-pain-by-a-cross-talk-with-acid-sensing-ion-channel-3
#3
Yeu-Shiuan Su, Hao-Ruei Mei, Chun-Hung Wang, Wei-Hsin Sun
Mirror-image pain (MIP), which occurs along with complex regional pain syndrome, rheumatoid arthritis and chronic migraine, is characterized by increased pain sensitivity of healthy body regions other than the actual injured or inflamed sites. A high level of peripheral inflammation may activate central or peripheral glia, triggering mirror-image pain. However, which receptors mediate inflammatory signals to contribute glial activation remains unclear. Intraplantarly injecting mice with 5-hydroxytryptamine (5-HT) or acidic buffer (proton) caused only unilateral hyperalgesia, but co-injection of 5-HT/acid induced bilateral hyperalgesia (MIP)...
November 28, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29194109/crystalline-arthropathy-and-bone-health
#4
Ian Chang, David Gazeley
PURPOSE OF REVIEW: The purpose of this review is to provide insight on the proposed association between crystal arthritis and bone health. Crystal arthritis is the most common type of inflammatory arthritis, and fractures contribute to significant morbidity and mortality, therefore, the relationship between the two is of clinical importance. RECENT FINDINGS: There have been variable findings regarding hyperuricemia, low bone density and risk of fracture. A recent systematic review and meta-analysis of available literature showed a correlation between increased serum uric acid and lower risk of fracture...
November 30, 2017: Current Opinion in Rheumatology
https://www.readbyqxmd.com/read/29194002/auranofin-a-thioredoxin-reductase-inhibitor-causes-platelet-death-through-calcium-overload
#5
Matthew T Harper
Platelets are central to normal hemostasis and must be tightly controlled to prevent thrombosis. However, drug treatments that also affect platelets could lead to unwanted side effects on hemostasis or thrombosis. In this study, the effect of auranofin on platelets was tested. Auranofin, a gold-based thioredoxin reductase (TRXR) inhibitor, has been previously used in arthritis. Recently, auranofin and other inhibitors of the thioredoxin system have been proposed as novel anti-cancer therapies. TRXR is an important part of the antioxidant defenses in many cells that maintain intracellular proteins in their reduced state...
December 1, 2017: Platelets
https://www.readbyqxmd.com/read/29173692/socioeconomic-and-therapy-factor-influence-on-self-reported-fatigue-anxiety-and-depression-in-rheumatoid-arthritis-patients
#6
Mirjana Lapčević, Mira Vuković, Branislav S Gvozdenović, Vesna Mioljević, Snežana Marjanović
INTRODUCTION: Fatigue, anxiety and depression are very frequent symptoms in patients with rheumatoid arthritis (RA). GOALS: In this study we evaluated the influence of socioeconomic characteristics, therapy and comorbidities on the self-reported high fatigue, anxiety and depression in patients with RA. METHOD: Multicenter cross-sectional study was performed in 22 health institutions in Serbia during the period from April-August 2014 in population of older RA patients...
November 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/29124698/role-of-vitamin-d-in-rheumatoid-arthritis
#7
Mattia Bellan, Pier Paolo Sainaghi, Mario Pirisi
Vitamin D is a fat soluble hormone, with a well described role in bone health and calcium/phosphate metabolism. Recent evidences have related vitamin D to other physiological functions and pathological conditions. Specifically, vitamin D has widely proven activities on immune system and evidences suggest that it may be implicated in the pathogenesis of rheumatoid arthritis (RA). The relationship between vitamin D and RA is complex, also because a deficitary vitamin D status, which is very common in RA patients, can contribute to the increased risk of osteoporosis typical of RA...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29120570/early-referral-improves-long-term-outcomes-in-rheumatoid-arthritis
#8
Jobie Evans, Andra Negoescu
Rheumatoid arthritis (RA) is a common, chronic systemic inflammatory disease of unclear aetiology leading to synovial hypertrophy and joint inflammation. It typically presents with symmetrical polyarthritis of small joints of the hands or feet, but can also involve larger joints, and have associated extra-articular manifestations. Diagnosis is based on duration of symptoms, joint distribution, level of inflammatory markers and autoantibodies i.e. rheumatoid factor(RhF) and anty-cyclic citrullinated peptide (CCP) antibodies...
May 2017: Practitioner
https://www.readbyqxmd.com/read/29114388/epistatic-interactions-between-mutations-of-taci-tnfrsf13b-and-tcf3-result-in-a-severe-primary-immunodeficiency-disorder-and-systemic-lupus-erythematosus
#9
Rohan Ameratunga, Wikke Koopmans, See-Tarn Woon, Euphemia Leung, Klaus Lehnert, Charlotte A Slade, Jessica C Tempany, Anselm Enders, Richard Steele, Peter Browett, Philip D Hodgkin, Vanessa L Bryant
Common variable immunodeficiency disorders (CVID) are a group of primary immunodeficiencies where monogenetic causes account for only a fraction of cases. On this evidence, CVID is potentially polygenic and epistatic although there are, as yet, no examples to support this hypothesis. We have identified a non-consanguineous family, who carry the C104R (c.310T>C) mutation of the Transmembrane Activator Calcium-modulator and cyclophilin ligand Interactor (TACI, TNFRSF13B) gene. Variants in TNFRSF13B/TACI are identified in up to 10% of CVID patients, and are associated with, but not solely causative of CVID...
October 2017: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/29105349/cost-effectiveness-of-bisphosphonates-for-prevention-of-fracture-related-to-glucocorticoid-induced-osteoporosis-in-malaysia
#10
Nurul-Ain Mohd-Tahir, Paraidathathu Thomas, Mohd-Shahrir Mohamed-Said, Mohd Makmor-Bakry, Shu-Chuen Li
INTRODUCTION: Glucocorticoid therapy is associated with an appreciable risk of bone loss leading to fractures that require expensive treatments. This study aimed to evaluate the cost-effectiveness of bisphosphonates for prevention of hip fracture in glucocorticoid-induced osteoporosis (GIOP) in Malaysia. METHOD: Retrospective data were collected from GIOP patients referred to the Universiti Kebangsaan Malaysia Medical Centre. Fracture events and direct medical costs were compared between bisphosphonates and calcium/vitamin D combination...
November 3, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/29079928/calcification-of-coronary-arteries-in-early-rheumatoid-arthritis-prior-to-anti-rheumatic-therapy
#11
Helen V Udachkina, Diana S Novikova, Tatiana V Popkova, Irina G Kirillova, Evgenia I Markelova, Elena L Luchikhina, Galina V Lukina, Valentin E Sinitsyn, Dmitry E Karateev, Eugeniy L Nasonov
Accelerated coronary atherosclerosis is common in patients with rheumatoid arthritis (RA). To examine coronary artery calcification (CAC) frequency and severity, its correlation with traditional risk factors (TRF) of cardiovascular diseases (CVD) and inflammatory markers in patients with early RA prior to anti-rheumatic therapy. RA adult patients (ACR/EULAR criteria, 2010, duration ≤ 12 months, without prior administration of disease-modifying anti-rheumatic drugs, glucocorticoids) underwent 32-row scanning for CAC scoring...
October 27, 2017: Rheumatology International
https://www.readbyqxmd.com/read/29077279/error-in-optimized-calcium-dosage-shown-in-table-2-of-the-article-by-buckley-et-al-arthritis-rheumatol-august-2017
#12
(no author information available yet)
No abstract text is available yet for this article.
November 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29070531/affinity-maturation-shapes-the-function-of-agonistic-antibodies-to-peptidylarginine-deiminase-type-4-in-rheumatoid-arthritis
#13
Jing Shi, Erika Darrah, Gary P Sims, Tomas Mustelin, Kevon Sampson, Maximilian F Konig, Clifton O Bingham, Antony Rosen, Felipe Andrade
OBJECTIVES: The citrullinating enzyme peptidylarginine deiminase type 4 (PAD4) is the target of a polyclonal group of autoantibodies in patients with rheumatoid arthritis (RA). A subgroup of such antibodies, initially identified by cross-reactivity with peptidylarginine deiminase type 3 (PAD3), is strongly associated with progression of radiographic joint damage and interstitial lung disease and has the unique ability to activate PAD4. The features of these antibodies in terms of their T cell-dependent origin, genetic characteristics and effect of individual antibody specificities on PAD4 function remain to be defined...
October 25, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/29047085/redox-dependent-calpain-signaling-in-airway-and-pulmonary-vascular-remodeling-in-copd
#14
Laszlo Kovacs, Yunchao Su
The calcium-dependent cytosolic, neutral, thiol endopeptidases, calpains, perform limited cleavage of their substrates thereby irreversibly changing their functions. Calpains have been shown to be involved in several physiological processes such as cell motility, proliferation, cell cycle, signal transduction, and apoptosis. Overactivation of calpain or mutations in the calpain genes contribute to a number of pathological conditions including neurodegenerative disorders, rheumatoid arthritis, cancer, and lung diseases...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29021467/tuberculosis-of-the-wrist-accompanied-with-calcium-pyrophosphate-a-case-report
#15
Kenya Watanabe, Yoshitaka Yamazaki, Mariko Sugawara
This is a rare case of tuberculosis (TB) complicated with pseudogout of the wrist joint in a non-immunocompromised 84-year-old female with a history of pulmonary tuberculosis. She was diagnosed with extrapulmonary tuberculosis of the wrist based on a polymerase chain reaction (PCR) study and synovial fluid aspiration in which the cytology was positive for acid-fast bacilli. Calcium pyrophosphate was also positive. We must be careful not to miss articular tuberculosis as it may mimic common inflammatory arthritis, such as pseudogout of the wrist...
October 11, 2017: Internal Medicine
https://www.readbyqxmd.com/read/28993780/spontaneous-secretion-of-the-citrullination-enzyme-pad2-and-cell-surface-exposure-of-pad4-by-neutrophils
#16
Yebin Zhou, Bo Chen, Nanette Mittereder, Raghothama Chaerkady, Martin Strain, Ling-Ling An, Saifur Rahman, Wenting Ma, Choon Pei Low, Denice Chan, Frances Neal, Clifton O Bingham, Kevon Sampson, Erika Darrah, Richard M Siegel, Sarfaraz Hasni, Felipe Andrade, Katherine A Vousden, Tomas Mustelin, Gary P Sims
Autoantibodies directed against citrullinated epitopes of proteins are highly diagnostic of rheumatoid arthritis (RA), and elevated levels of protein citrullination can be found in the joints of patients with RA. Calcium-dependent peptidyl-arginine deiminases (PAD) are the enzymes responsible for citrullination. PAD2 and PAD4 are enriched in neutrophils and likely drive citrullination under inflammatory conditions. PADs may be released during NETosis or cell death, but the mechanisms responsible for PAD activity under physiological conditions have not been fully elucidated...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28986307/interleukin-1%C3%AE-and-tumor-necrosis-factor-%C3%AE-augment-acidosis-induced-rat-articular-chondrocyte-apoptosis-via-nuclear-factor-kappab-dependent-upregulation-of-asic1a-channel
#17
Ren-Peng Zhou, Bei-Bei Dai, Ya-Ya Xie, Xiao-Shan Wu, Zhi-Sen Wang, Yue Li, Zhi-Qiang Wang, Sheng-Qin Zu, Jin-Fang Ge, Fei-Hu Chen
The acute-phase proinflammatory cytokines interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) demonstrate high-level expression and pleiotropic biological effects, and contribute to the progression and persistence of rheumatoid arthritis (RA). Acid hydrarthrosis is also an important pathological characteristic of RA, and the acid-sensing ion channel 1a (ASIC1a) plays a critical role in acidosis-induced chondrocyte cytotoxicity. However, the roles of IL-1β and TNF-α in acid-induced apoptosis of chondrocytes remain unclear...
October 3, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28955501/associations-between-coronary-and-carotid-artery-atherosclerosis-in-patients-with-inflammatory-joint-diseases
#18
Mona Svanteson, Silvia Rollefstad, Nils Einar Kløw, Jonny Hisdal, Eirik Ikdahl, Anne Grete Semb, Ylva Haig
OBJECTIVE: Low association between cardiac symptoms and coronary artery disease (CAD) in patients with inflammatory joint diseases (IJD) demands for objective markers to improve cardiovascular risk stratification. Our main aim was to evaluate the prevalence and characteristics of CAD in patients with IJD with carotid artery plaques. Furthermore, we aimed to assess associations of carotid ultrasonographic findings and coronary plaques. METHODS: Eighty-six patients (61% female) with IJD (55 with rheumatoid arthritis, 21 with ankylosing spondylitis and 10 with psoriatic arthritis) and carotid artery plaque were referred to coronary CT angiography (CCTA)...
2017: RMD Open
https://www.readbyqxmd.com/read/28938959/rheumatoid-arthritis-complicates-noninvasive-whole-blood-gene-expression-testing-for-coronary-artery-disease
#19
Ryan Jessee, Erica Peart, Phil Beineke, Steven Rosenberg, James A Wingrove, William E Kraus, Kim M Huffman
BACKGROUND: Our objective was to evaluate an age- and sex-specific gene expression score (ASGES) previously validated to detect obstructive coronary artery disease (CAD) in patients with rheumatoid arthritis (RA). METHODS: We evaluated 20 pairs of nondiabetic coronary patients with and without RA, selected by matching on age, sex, race, body mass index, tobacco use, and number of diseased coronary vessels. Peripheral blood gene expression levels of 23 CAD-associated genes were measured, and a previously validated CAD risk score including age, sex, and gene expression levels (Corus CAD) was computed...
October 2017: American Heart Journal
https://www.readbyqxmd.com/read/28937414/rheumatoid-arthritis-and-citrullination
#20
Erika Darrah, Felipe Andrade
PURPOSE OF REVIEW: Dysregulated citrullination is a key element that drives the production and maintenance of antibodies to citrullinated proteins, a hallmark in rheumatoid arthritis (RA). This article reviews recent literature on the origin of citrullinated antigens in RA. RECENT FINDINGS: The study of synovial fluid from patients with RA has provided important insights into the identity of citrullinated proteins that accumulate in the RA joint (the RA citrullinome) and mechanisms that control their generation...
September 21, 2017: Current Opinion in Rheumatology
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