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Rheumatoid factor

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https://www.readbyqxmd.com/read/28811351/content-and-construct-validity-reliability-and-responsiveness-of-the-rheumatoid-arthritis-flare-questionnaire-omeract-2016-workshop-report
#1
Susan J Bartlett, Skye P Barbic, Vivian P Bykerk, Ernest H Choy, Rieke Alten, Robin Christensen, Alfons den Broeder, Bruno Fautrel, Daniel E Furst, Francis Guillemin, Sarah Hewlett, Amye L Leong, Anne Lyddiatt, Lyn March, Pamela Montie, Christoph Pohl, Marieke Scholte Voshaar, Thasia G Woodworth, Clifton O Bingham
OBJECTIVE: The Outcome Measures in Rheumatology (OMERACT) Rheumatoid Arthritis (RA) Flare Group was established to develop a reliable way to identify and measure RA flares in randomized controlled trials (RCT). Here, we summarized the development and field testing of the RA Flare Questionnaire (RA-FQ), and the voting results at OMERACT 2016. METHODS: Classic and modern psychometric methods were used to assess reliability, validity, sensitivity, factor structure, scoring, and thresholds...
August 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28811047/development-of-an-item-bank-to-measure-factual-disease-and-treatment-related-knowledge-of-rheumatoid-arthritis-patients-in-the-treat-to-target-era
#2
Marieke J de Jonge, Martijn A H Oude Voshaar, Anita M P Huis, Mart A F J van de Laar, Marlies E J L Hulscher, Piet L C M van Riel
OBJECTIVE: To develop a Disease and treatment associated Knowledge in RA item bank (DataK-RA) based on item response theory. METHODS: Initial items were developed from a systematic review. Rheumatology professionals identified relevant content trough a RAND modified Delphi scoring procedure and consensus meeting. RA patients provided additional content trough a focus group. Patients and professionals rated readability, feasibility and comprehensiveness of resulting items...
July 21, 2017: Patient Education and Counseling
https://www.readbyqxmd.com/read/28810929/the-impact-of-age-and-gut-microbiota-on-th17-and-tfh-cells-in-k-bxn-autoimmune-arthritis
#3
Fei Teng, Krysta M Felix, C Pierce Bradley, Debdut Naskar, Heqing Ma, Walid A Raslan, Hsin-Jung Joyce Wu
BACKGROUND: Age is an important risk factor for rheumatoid arthritis (RA), which often develops in middle age. However, how age-associated changes in immunity impact RA is poorly understood. Gut microbiota are known to be involved in the pathogenesis of RA, but the effects of microbiota in older subjects remain mostly unknown. METHODS: We used segmented filamentous bacteria (SFB), a gut commensal species with immunomodulatory effects, and K/BxN mice, a T cell receptor (TCR) transgenic model, to study the effect of age and microbiota on autoimmune arthritis...
August 15, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28809379/periodontal-salivary-and-il-6-status-in-rheumatoid-arthritis-patients-a-cross-sectional-study
#4
J Silvestre-Rangil, L Bagán, F Silvestre, M Martinez-Herrera, J Bagán
BACKGROUND: The aim of this study was to determine whether saliva interleukin-6 (IL-6) levels are elevated in patients with rheumatoid arthritis versus a control group and examine the possible relationship between the oral condition and the risk of RA. MATERIAL AND METHODS: In 30 patients with RA and 30 healthy controls, different periodontal indices were recorded; sialometric measurements were taken to determine resting whole saliva, stimulated whole saliva and stimulated parotid saliva flow; and the saliva IL-6 levels were measured...
August 15, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28808568/thymosin-%C3%AE-4-in-rheumatoid-arthritis-friend-or-foe
#5
Kyoung Soo Kim, Hyung-In Yang
Rheumatoid arthritis (RA) has characteristic pannus tissues, which show tumor-like growth of the synovium through chronic joint inflammation. The synovium is highly penetrated by various immune cells, and the synovial lining becomes hyperplastic due to increased numbers of macrophage-like and fibroblast-like synoviocytes. Thus, a resultant hypoxic condition stimulates the expression of inflammation-related genes in various cells, in particular, vascular endothelial growth factor. Thymosin β4 (Tβ4), a 5-kDa protein, is known to play a significant role in various biological activities, such as actin sequestering, cell motility, migration, inflammation, and damage repair...
September 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28808141/a-critical-role-for-plasma-kallikrein-in-the-pathogenesis-of-autoantibody-induced-arthritis
#6
Aizhen Yang, Junsong Zhou, Bo Wang, Jihong Dai, Robert W Colman, Wenchao Song, Yi Wu
The plasma kallikrein-kinin system (KKS) consists of serine proteases, prekallikrein (pKal) and factor XII (FXII), and a cofactor, high-MW kininogen (HK). Upon activation, activated pKal and FXII cleave HK to release bradykinin. Activation of this system has been noted in patients with rheumatoid arthritis, and its pathogenic role has been characterized in animal arthritic models. In this study, we generated 2 knockout mouse strains that lacked pKal and HK and determined the role of KKS in autoantibody-induced arthritis...
August 14, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28807652/severity-indices-in-rheumatoid-arthritis-a-systematic-review
#7
Esther Toledano, M Jesús García de Yébenes, Isidoro González-Álvaro, Loreto Carmona
OBJECTIVE: To identify tools designed to evaluate the severity of patients with rheumatoid arthritis (RA) in order to use them in the investigation of prognostic markers in early arthritis. METHODS: We conducted a systematic review of studies that developed/validated an index for RA disease severity. They were analyzed using the COSMIN checklist to assess their methodological quality. In addition, all the variables included were evaluated for their clarity of definition, feasibility and probability of being present in each outcome during the first 2 years of the disease course...
August 11, 2017: Reumatología Clinica
https://www.readbyqxmd.com/read/28807082/hearing-status-in-patients-with-rheumatoid-arthritis
#8
A Ahmadzadeh, M Daraei, M Jalessi, A A Peyvandi, E Amini, L A Ranjbar, A Daneshi
OBJECTIVE: Rheumatoid arthritis is thought to induce conductive hearing loss and/or sensorineural hearing loss. This study evaluated the function of the middle ear and cochlea, and the related factors. METHODS: Pure tone audiometry, speech reception thresholds, speech discrimination scores, tympanometry, acoustic reflexes, and distortion product otoacoustic emissions were assessed in rheumatoid arthritis patients and healthy volunteers. RESULTS: Pure tone audiometry results revealed a higher bone conduction threshold in the rheumatoid arthritis group, but there was no significant difference when evaluated according to the sensorineural hearing loss definition...
August 15, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28807007/tnf-%C3%AE-induced-mir-155-regulates-il-6-signaling-in-rheumatoid-synovial-fibroblasts
#9
Kiyoshi Migita, Nozomi Iwanaga, Yasumori Izumi, Chieko Kawahara, Kenji Kumagai, Tadashi Nakamura, Tomohiro Koga, Atsushi Kawakami
BACKGROUND: MicroRNAs (miRNAs) are important regulators of a variety of inflammatory mediators. The present study was undertaken to elucidate the role of miRNAs in the rheumatoid cytokine network. METHODS: We analyzed miRNA expression in rheumatoid synovial fibroblasts (RASFs). miRNA array-based screening was used to identify miRNAs differentially expressed between tumor necrosis factor-α (TNF-α)-activated RASFs and untreated RASFs. Transfection of RASFs with miR-155 was used to analyze the function of miR-155...
August 14, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28806729/erk2-and-jnk1-contribute-to-tnf-%C3%AE-induced-il-8-expression-in-synovial-fibroblasts
#10
Shinichi Namba, Rei Nakano, Taku Kitanaka, Nanako Kitanaka, Tomohiro Nakayama, Hiroshi Sugiya
Tumor necrosis factor α (TNF-α) induces the expression and secretion of interleukin 8 (IL-8), which contributes to synovitis in rheumatoid arthritis (RA). To elucidate the mechanism of the onset of RA, we used synovial fibroblasts without autoimmune inflammatory diseases and investigated MAPK signaling pathways in TNF-α-induced IL-8 expression. Synovial fibroblasts isolated from healthy dogs were characterized by flow cytometry, which were positive for the fibroblast markers CD29, CD44, and CD90 but negative for the hematopoietic cell markers CD14, CD34, CD45, and HLA-DR...
2017: PloS One
https://www.readbyqxmd.com/read/28805018/pain-catastrophizing-is-strongly-associated-with-subjective-outcomes-but-not-with-inflammatory-assessments-in-rheumatoid-arthritis-patients
#11
Hilde B Hammer, Till Uhlig, Tore K Kvien, Jon Lampa
OBJECTIVES: Pain catastrophizing is conceptualized as a negative cognitive-affective response to anticipated or actual pain and has been associated with important pain-related outcomes. The objective of this prospective study of established rheumatoid arthritis (RA) patients was to explore how pain catastrophizing was related to patient-reported outcomes (PROs), composite scores and assessments of inflammatory activity. METHODS: RA patients starting bDMARD were examined at baseline and after 1, 2, 3, 6 and 12 months with PROs (joint pain/patient's global VAS, MHAQ, RAID score), clinical and laboratory assessments (tender/swollen joint count, assessor's global VAS, ESR/CRP), ultrasound (US) (grey scale/power Doppler of 36 joints and 4 tendons) and pain catastrophizing...
August 13, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28804717/angiogenesis-dysregulation-in-psoriatic-arthritis-molecular-mechanisms
#12
REVIEW
Francesco Paolo Cantatore, Nicola Maruotti, Addolorata Corrado, Domenico Ribatti
There is evidence that psoriatic arthritis is closely linked to angiogenesis. Morphological changes described in blood vessels of psoriatic arthritis joints suggest the presence of a dysregulated angiogenesis resulting in the formation of immature vessels. Even if the reason of this inefficient angiogenesis is still unclear, an imbalance between angiogenic and antiangiogenic factors is probably responsible for inducing a dysregulated angiogenesis in psoriatic arthritis, which seems to be involved in its pathogenesis and clinical features...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28803184/association-of-asthma-with-rheumatoid-arthritis-a-population-based-case-control-study
#13
Youn Ho Sheen, Mary C Rolfes, Chung-Il Wi, Cindy S Crowson, Richard S Pendegraft, Katherine S King, Euijung Ryu, Young J Juhn
BACKGROUND: TH1 and TH2 cells have counterregulatory relationships. However, the relationship between asthma, a TH2-predominant condition, and risk of systemic inflammatory diseases such as rheumatoid arthritis (RA), a TH1 condition, is poorly understood. OBJECTIVE: We aimed to determine whether asthma was associated with increased risks of incident RA among adults. METHODS: We conducted a retrospective population-based case-control study that examined existing incident RA cases and controls matched by age, sex, and registration year from the general population in Olmsted County, Minnesota, between January 2002 and December 2007...
August 9, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28802996/il-33-matured-dendritic-cells-promote-th17-cell-responses-via-il-1%C3%AE-and-il-6
#14
Su-Ho Park, Myun Soo Kim, Hui Xuan Lim, Daeho Cho, Tae Sung Kim
IL-33 is associated with a variety of autoimmune diseases, such as sclerosis, inflammatory bowel disease, and rheumatoid arthritis. Although IL-33 is mainly involved in the induction of Th2 cells, however, the relationship between IL-33 and Th17 cells is still largely unknown. In this study, we investigated the effects of IL-33 on DC-mediated CD4(+) T cell activation and Th17 cell differentiation because DCs are essential cells for presenting self-antigens to CD4(+) T cells in autoimmune disease conditions...
August 10, 2017: Cytokine
https://www.readbyqxmd.com/read/28801345/molecular-basis-for-increased-susceptibility-of-indigenous-north-americans-to-seropositive-rheumatoid-arthritis
#15
Stephen W Scally, Soi-Cheng Law, Yi Tian Ting, Jurgen van Heemst, Jeremy Sokolove, Aaron J Deutsch, E Bridie Clemens, Antonis K Moustakas, George K Papadopoulos, Diane van der Woude, Irene Smolik, Carol A Hitchon, David B Robinson, Elizabeth D Ferucci, Charles N Bernstein, Xiaobo Meng, Vidyanand Anaparti, Tom Huizinga, Katherine Kedzierska, Hugh H Reid, Soumya Raychaudhuri, René E Toes, Jamie Rossjohn, Hani El-Gabalawy, Ranjeny Thomas
OBJECTIVE: The pathogenetic mechanisms by which HLA-DRB1 alleles are associated with anticitrullinated peptide antibody (ACPA)-positive rheumatoid arthritis (RA) are incompletely understood. RA high-risk HLA-DRB1 alleles are known to share a common motif, the 'shared susceptibility epitope (SE)'. Here, the electropositive P4 pocket of HLA-DRB1 accommodates self-peptide residues containing citrulline but not arginine. HLA-DRB1 His/Phe13β stratifies with ACPA-positive RA, while His13βSer polymorphisms stratify with ACPA-negative RA and RA protection...
August 11, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28800780/a-novel-scoring-system-based-on-common-laboratory-tests-predicts-the-efficacy-of-tnf-inhibitor-and-il-6-targeted-therapy-in-patients-with-rheumatoid-arthritis-a-retrospective-multicenter-observational-study
#16
Jin Nakagawa, Yoshinobu Koyama, Atsushi Kawakami, Yukitaka Ueki, Hiroshi Tsukamoto, Takahiko Horiuchi, Shuji Nagano, Ayumi Uchino, Toshiyuki Ota, Mitsuteru Akahoshi, Koichi Akashi
BACKGROUND: Currently, although several categories of biological disease-modifying antirheumatic drugs (bDMARDs) are available, there are few data informing selection of initial treatment for individual patients with rheumatoid arthritis (RA). Therefore, tumor necrosis factor inhibitor (TNF-i) and tocilizumab (TCZ) are treated as equivalent treatments in the recent disease management recommendations. We focused on two anticytokine therapies, TCZ and TNF-i, and aimed to develop a scoring system that predicts a better treatment for each RA patient before starting an IL-6 or a TNF-i...
August 11, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28800262/risk-factors-predisposing-to-the-development-of-hypogammaglobulinemia-and-infections-post-rituximab
#17
Evangelos A A Christou, Giuliana Giardino, Austen Worth, Fani Ladomenou
Rituximab (RTX) is a monoclonal antibody against CD20, commonly used in the treatment of hematological malignancies and autoimmune diseases. The use of RTX is related to the development of hypogammaglobulinemia and infections. Aim of this review is to summarize the evidence supporting the association of specific risk factors with the development of hypogammaglobulinemia and infections post-RTX. Immunological complications are more common in patients with malignant diseases as compared to non-malignant diseases...
August 11, 2017: International Reviews of Immunology
https://www.readbyqxmd.com/read/28800164/b-cell-phenotypes-in-patients-with-rheumatoid-arthritis-relapsing-after-rituximab-expression-of-b-cell-activating-factor-binding-receptors-on-b-cell-subsets
#18
Elena Becerra, Inmaculada De La Torre, Maria J Leandro, Geraldine Cambridge
OBJECTIVES: Serum levels of B cell activating factor (BAFF) rise following Rituximab (RTX) therapy in patients with Rheumatoid arthritis (RA). Initiation of naïve B cell return to the periphery and autoreactive B cell expansion leading to relapse after RTX may therefore be linked to interactions between BAFF and BAFF-binding receptors (BBR). METHODS: Relationships between serum BAFF and BBR expression (BAFFR, TACI and BCMA) were determined on B cell subsets, defined using IgD/CD38...
August 11, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28795508/occupation-and-risk-of-developing-rheumatoid-arthritis-results-from-a-population-based-case-control-study
#19
Anna Ilar, Lars Alfredsson, Pernilla Wiebert, Lars Klareskog, Camilla Bengtsson
OBJECTIVE: Environmental factors are of importance for the etiology of rheumatoid arthritis (RA), but much remains unknown concerning the contributions from distinct occupational hazards. We explored the association between occupation and the risk of anti-citrullinated protein antibody (ACPA) + RA or ACPA- RA. METHODS: We analyzed 3,522 cases and 5,580 controls from the Swedish population-based EIRA case-control study. A questionnaire was used to obtain information on work history and lifestyle factors...
August 10, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28794554/mucocutaneous-manifestations-in-patients-with-rheumatoid-arthritis-a-cross-sectional-study-from-eastern-india
#20
Sudip Kumar Ghosh, Debabrata Bandyopadhyay, Surajit Kumar Biswas, Ivoreen Darung
BACKGROUND: Cutaneous manifestations are fairly common in rheumatoid arthritis (RA) and they can help in early diagnosis, prompt treatment, and hence reduced morbidity from the disease. AIMS: The objective of the present study was to find out the different patterns of dermatoses in a group of patients with RA from Eastern India. METHODOLOGY: Consecutive patients fulfilling the American Rheumatism Association 1987 revised criteria for the classification of RA and who had different dermatoses were included in this cross-sectional study done over a period of 8 years in a tertiary care hospital in Eastern India...
July 2017: Indian Journal of Dermatology
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