scholarly journals A study of IgG-rheumatoid factor in the serum of patients with rheumatoid arthritis.

1993 ◽  
Vol 16 (2) ◽  
pp. 132-139
Author(s):  
Shigeo Aoki ◽  
Kohzoh Imai ◽  
Miyuki Yamamura ◽  
Masayuki Tsujisaki ◽  
Toshiroh Sugiyama ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Rheumatoid Factor ◽  
Igg Rheumatoid Factor

IgG-rheumatoid factor in seronegative rheumatoid arthritis

1983 ◽  
Vol 12 (sup52) ◽  
pp. 79-79
Author(s):  
T. Palosuo ◽  
K. Aho ◽  
V. Raunio ◽  
K. Kaarela
Keyword(s):  
Rheumatoid Arthritis ◽  
Rheumatoid Factor ◽  
Igg Rheumatoid Factor

IgG RHEUMATOID FACTOR IN PURIFIED IgG FRACTIONS AND WHOLE SERA FROM PATIENTS WITH RHEUMATOID ARTHRITIS

Rheumatology ◽  
1989 ◽  
Vol 28 (3) ◽  
pp. 227-232
Author(s):  
N. HARATS ◽  
A. RUBINOW ◽  
R. FISCHEL ◽  
D. EILAT
Keyword(s):  
Rheumatoid Arthritis ◽  
Rheumatoid Factor ◽  
Igg Rheumatoid Factor

scholarly journals IgG Rheumatoid Factor in Synovial Fluid of Patients with Rheumatoid Arthritis.

1998 ◽  
Vol 47 (2) ◽  
pp. 693-697
Author(s):  
Minoru Ikeda ◽  
Toshio Inoue ◽  
Takashi Ishinishi ◽  
Kosuke Ogata
Keyword(s):  
Rheumatoid Arthritis ◽  
Synovial Fluid ◽  
Rheumatoid Factor ◽  
Igg Rheumatoid Factor

scholarly journals Increased IgG Rheumatoid Factor-Positivity in the Asian Rheumatoid Arthritis Patients Irrespective of Ethnicity

2014 ◽  
Vol 04 (01) ◽  
pp. 43-51 ◽  
Author(s):  
Chun Lai Too ◽  
Johan Rönnelid ◽  
Yuslina Mat Yusoff ◽  
Jasbir Singh Dhaliwal ◽  
Nor Ashikin Jinah ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Rheumatoid Factor ◽  
Igg Rheumatoid Factor

IgG Rheumatoid Factor-Secreting Lymphocytes in Rheumatoid Arthritis: Evaluation of a Haemolytic Plaque-Forming Cell Technique

1983 ◽  
Vol 17 (5) ◽  
pp. 471-478 ◽  
Author(s):  
J. PETERSEN ◽  
C. HEILMANN ◽  
O. J. BJERRUM ◽  
T. INGEMANN-HANSEN ◽  
J. HALKJaeR-KRISTENSEN
Keyword(s):  
Rheumatoid Arthritis ◽  
Rheumatoid Factor ◽  
Igg Rheumatoid Factor

scholarly journals Detection of anti-SARS-CoV-2 antibodies in patients with rheumatoid arthritis.

2020 ◽  
Author(s):  
Shomi Oka ◽  
Takashi Higuchi ◽  
Hiroshi Furukawa ◽  
Kota Shimada ◽  
Atsushi Hashimoto ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Rheumatoid Factor ◽  
Serological Test ◽  
Rheumatoid Factors ◽  
National Hospital ◽  
Serum Samples ◽  
Igg Rheumatoid Factor ◽  
Electrochemiluminescence Immunoassay ◽  
N 93 ◽  
Prior Infection

Abstract Objectives: The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes coronavirus disease 2019 (COVID-19) and the outbreak of COVID-19 was reported in December 2019 in Wuhan, China. Serological test is conducted to discriminate prior infection of SARS-CoV-2. The influence of auto-antibodies on the results of anti-SARS-CoV-2 antibodies was investigated in a few studies. Here, we investigated whether the results of anti-SARS-CoV-2 antibodies would be modified in patients with rheumatoid arthritis (RA). Methods: Patients with RA were recruited at Sagamihara National Hospital from July 2014 to October 2015 (n=38, 2014 cohort) and at Tokyo National Hospital from June to October 2020 (n=93, 2020 cohort). Anti-SARS-CoV-2 antibodies were measured in collected sera from these RA patients by electrochemiluminescence immunoassay (ECLIA) or immunochromatographic assay (ICA). Results: Anti-SARS-CoV-2 antibodies were not detected in all the samples form RA patients in both cohorts by the ECLIA. However, anti-SARS-CoV-2 antibodies were detected in the serum samples from three (7.9%) in 2014 cohort by the ICA and fifteen (16.1%) in 2020 cohort. The IgM rheumatoid factor levels were increased in RA patients with IgM anti-SARS-CoV-2 antibodies by ICA compared with RA without any anti-SARS-CoV-2 antibodies (mean ± standard deviation [IU/ml], 1223.0 ± 1308.7 vs. 503.6 ± 1947.2, P=0.0101). The levels of IgG rheumatoid factor were also upregulated in RA patients with IgM anti-SARS-CoV-2 antibodies by ICA (4.0 ± 0.7 vs. 2.4 ± 0.9, P=0.0013). Conclusion: The results of IgM anti-SARS-CoV-2 antibody by the ICA would be modified by IgM or IgG rheumatoid factors in RA patients.

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