Detection of IgM Rheumatoid Factors by Enzyme-Linked Immunosorbent Assay in Children with Juvenile Rheumatoid Arthritis: Correlation With Articular Disease and Laboratory Abnormalities

PEDIATRICS ◽  
1992 ◽  
Vol 90 (6) ◽  
pp. 945-949
Author(s):  
James N. Jarvis ◽  
Tracey Pousak ◽  
Margit Krenz
Keyword(s):  
Rheumatoid Arthritis ◽  
Disease Activity ◽  
Juvenile Rheumatoid Arthritis ◽  
Immunosorbent Assay ◽  
Clinical Relevance ◽  
Scoring System ◽  
Enzyme Linked Immunosorbent Assay ◽  
Rheumatoid Factors ◽  
Transient Phenomenon ◽  
Polyarticular Disease

This study was undertaken to determine the clinical relevance of IgM rheumatoid factors (RFs) detected by enzyme-linked immunosorbent assay (ELISA) in children with juvenile rheumatoid arthritis (JRA) by examining their association with severity of acute articular disease. ELISAs for IgM-RF were performed on serum specimens from 65 children with JRA. Activity of articular disease was estimated by an arbitrary scoring system. Significant differences were seen in articular disease activity between the group of children with polyarticular disease who were IgM-RF-positive by ELISA compared with those who were IgM-RF-negative (P = .0003). When a small group of individual children with polyarticular disease were followed longitudinally, similar correlations were found between severity of acute disease and the presence of IgM-RFs detected by ELISA. In children with pauciarticular JRA, expression of IgM-RFs appeared to be a transient phenomenon with no correlation with either articular disease or laboratory abnormalities.

Quantitative measurement of anti-aquaporin-4 antibodies by enzyme-linked immunosorbent assay using purified recombinant human aquaporin-4

2011 ◽  
Vol 18 (5) ◽  
pp. 578-586 ◽  
Author(s):  
Woojun Kim ◽  
Ji-Eun Lee ◽  
Xue Feng Li ◽  
Su-Hyun Kim ◽  
Byeong-Gu Han ◽  
...  
Keyword(s):  
High Risk ◽  
Disease Activity ◽  
Immunosorbent Assay ◽  
Neurological Diseases ◽  
Aquaporin 4 ◽  
Enzyme Linked Immunosorbent Assay ◽  
Specific Marker ◽  
Longitudinal Measurement ◽  
Longitudinal Measurements ◽  
Baculovirus System

Background: Antibodies to aquaporin-4 (AQP4-Ab), known as NMO-IgG, are a sensitive and specific marker for neuromyelitis optica (NMO). Methods: To develop an enzyme-linked immunosorbent assay (ELISA) for AQP4-Ab, we expressed M23 isoform of human AQP4 in a baculovirus system, and used it as an antigen. We measured AQP4-Ab in the sera of 300 individuals: 64 with definite NMO, 31 with high-risk NMO, 105 with multiple sclerosis (MS), 57 with other neurological diseases (ONDs), and 43 healthy controls. We also performed longitudinal measurements of AQP4–Ab in 787 samples collected from 51 patients with definite or high-risk NMO. Results: AQP4-Abs were positive in 72% with definite NMO, 55% with high-risk NMO, and 4% with MS, but none of the OND patients and the healthy individuals. The longitudinal measurement showed AQP4-Ab levels correlating with disease activity. Out of 38 initially seropositive patients, 21 became seronegative under effective immunosuppressive therapy. During most relapses, the serum AQP4-Ab levels were either high or rising compared with the previous value, although rising AQP4-Ab levels did not always lead to acute exacerbation. Two of the 13 initially seronegative patients converted to seropositive following acute exacerbations. Conclusions: We established an AQP4-Ab ELISA, which could be a potential monitoring tool of disease activity.

IRIDOCYCLITIS IN JUVENILE RHEUMATOID ARTHRITIS

PEDIATRICS ◽  
1969 ◽  
Vol 44 (1) ◽  
pp. 92-100 ◽  
Author(s):  
Jane Schaller ◽  
Carl Kupfer ◽  
Ralph J. Wedgwood
Keyword(s):  
Rheumatoid Arthritis ◽  
Juvenile Rheumatoid Arthritis ◽  
Signs And Symptoms ◽  
Joint Disease ◽  
Slit Lamp ◽  
Patients At Risk ◽  
Eye Involvement ◽  
Eye Examination ◽  
Systemic Manifestations ◽  
Polyarticular Disease

Eight of 70 children with juvenile rheumatoid arthritis have developed iridocyclitis. This complication occurred more frequently in patients with monoarticular and pauciarticular disease (29%) than in patients with polyarticular disease (2%). Seven of eight patients with iridocyclitis have monoarticular or pauciarticular disease; none has had prominent systemic manifestations or evidence of ankylosing spondylitis. Iridocyclitis preceded joint manifestations in two of the patients and followed arthritis by 1 to 10 years in six of the patients. Activity of iridocyclitis and arthritis seemed unrelated; four patients developed iridocyclitis while arthritis was inactive. In seven children iridocyclitis began insidiously without acute symptoms. Eye involvement has remained unilateral in six patients. Six children have had significant decrease in visual acuity, and six continue to have active ocular inflammation despite therapy. Iridocyclitis is potentially a major cause of disability in juvenile rheumatoid arthritis. Early signs and symptoms may be minimal. Patients at risk are those with limited forms of joint disease. Early detection and therapy are crucial for prevention of permanent ocular damage. Careful eye examination should be a routine part of physical examination of children with rheumatoid arthritis, and periodic slit lamp examinations should be performed even when arthritis is in remission.

scholarly journals PREVALENCE OF 25-HYDROXY VITAMIN D DEFICIENCY AND SOME BIOCHEMICAL PARAMETERS IN IRAQI PATIENTS WITH RHEUMATOID ARTHRITIS AND THEIR ASSOCIATIONS WITH DISEASE ACTIVITY

2020 ◽  
pp. 132-136
Author(s):  
ABDULNASSER M AL-GEBORI ◽  
MOHAMMED HADI MUNSHED ALOSAMI ◽  
NAWAL HAIDER AL-HASHIMI
Keyword(s):  
Rheumatoid Arthritis ◽  
Vitamin D ◽  
Disease Activity ◽  
Biochemical Parameters ◽  
Enzyme Linked Immunosorbent Assay ◽  
Healthy Controls ◽  
25 Hydroxy Vitamin D ◽  
Calcium Magnesium ◽  
Calcium And Magnesium ◽  
25 Oh Vitamin D

Objectives: The objectives of the study were to evaluate changes in 25(OH) Vitamin D levels and some biochemical parameters in rheumatoid arthritis (RA) patients compared with healthy controls and assess the correlation of 25-hydroxy Vitamin D, calcium, magnesium, and disease activity. Study the effects of anti-RA drugs on these biochemical parameters and also the role of supplements calcium and 25-OH Vitamin D in RA patients. Methods: This study conducted between 60 patients for RA and 20 healthy controls according to the American College of Rheumatology standards in 2010. In this study, 25-hydroxy Vitamin D was measured using an enzyme-linked immunosorbent assay, and also some biochemical parameters were measured with a spectrophotometer (Humalyzer 2000). Results: Serum 25(OH) Vitamin D, calcium, magnesium, and albumin levels were significantly lower in RA patients compared with healthy controls. Serum alanine aminotransferase aspartate aminotransferase levels were significantly increased in RA patients compared with healthy controls. The correlation was non-significantly among 25-hydroxy Vitamin D and clinical disease activity index (CDAI), while the results showed significantly inverse correlation calcium and magnesium concentrations with CDAI. Conclusion: 25-OH Vitamin D, calcium, albumin, and magnesium deficiency appear to be widespread in patients with RA. Thus, biochemical changes in RA are reflected in the pathogenesis of RA. Furthermore, in these results, there is no relationship between Vitamin D and the disease activity, while there is a relationship between calcium and magnesium with disease activity.

Salivary Gland Ultrasonography as a Diagnostic Tool for Secondary Sjögren Syndrome in Rheumatoid Arthritis

2015 ◽  
Vol 42 (7) ◽  
pp. 1119-1122 ◽  
Author(s):  
Sunil Das ◽  
DoQuyen Huynh ◽  
Hong Yang ◽  
Arnoldas Ceponis ◽  
Arthur Kavanaugh
Keyword(s):  
Rheumatoid Arthritis ◽  
Salivary Gland ◽  
Oral Health ◽  
Disease Activity ◽  
Diagnostic Tool ◽  
Scoring System ◽  
Sjögren Syndrome ◽  
Sjogren Syndrome ◽  
Sicca Symptoms

Objective.To assess salivary gland ultrasonography (US) as a diagnostic tool for secondary Sjögren syndrome (sSS) in patients with rheumatoid arthritis (RA).Methods.Salivary gland US images from 30 patients with RA were graded using a validated semiquantitative scoring system. Sicca symptoms, oral health, and RA disease activity were assessed.Results.US changes consistent with SS were found in 40% of patients. Patients with higher US scores had more sicca symptoms as well as higher RA activity and poorer oral health.Conclusion.Salivary gland US may aid the diagnosis of sSS in patients with RA.

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