Serological markers of rheumatoid arthritis in patients with primary biliary cholangitis and the vice versa: A Tunisian study |
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| Affiliation: | 1. Laboratory of Immunology, Farhat Hached University Hospital, Sousse, Tunisia;2. Faculty of Pharmacy, Department of Immunology, University of Monastir, Monastir, Tunisia;3. Research Laboratory for “Epidemiology and Immunogenetics of Viral Infections” (LR14SP02), Sahloul University Hospital, University of Sousse, Sousse, Tunisia;4. High School of Sciences and Techniques of Health, Tunis El Manar University, Tunis, Tunisia;5. Research Unit “Obesity: Etiopathology and Treatment, UR18ES01”, National Institute of Nutrition and Food Technology, Tunis, Tunisia;6. Erasmus University Medical Centre, Department of Neuroscience, Rotterdam, Netherlands;7. LR12SP11, Biochemistry Department, Sahloul University Hospital, Sousse, Tunisia;8. Laboratory of Microbiology and Virology, Sahloul University Hospital, Sousse, Tunisia;1. Laboratorio de Microbioma, División de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico;2. Programa de Inmunología Molecular Microbiana, Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico;3. Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Av. Ciudad Universitaria 3000, C.P. 04510, Coyoacán, Ciudad de México, Mexico;1. Intensive Care Unit, The People’s Hospital of Yuhuan, Yuhuan, PR China;2. Department of Gastroenterology and Hepatology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, PR China;3. The Affiliated Kangning Hospital of Wenzhou Medical University, Wenzhou, PR China;1. Division of Clinical Immunology and Rheumatology, The University of Alabama at Birmingham, FOT 802, 510, 20th St South, Birmingham, AL 35294;2. Corrona LLC, Southborough, MA;3. Departments of Orthopedics and Medicine, University of Massachusetts Medical School, Worcester, MA;4. Department of Medicine, New York University School of Medicine, New York, NY;5. Corrona Research Foundation, Albany, NY;6. The Center for Rheumatology, Albany Medical College, Albany, NY;1. Disease Biology Laboratory, School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar, Odisha, India;2. Department of Rheumatology, Kalinga Institute of Medical Sciences, Bhubaneswar, Odisha, India;3. Immuno-Genomics and Systems Biology Lab, Institute of Life Sciences, Bhubaneswar, Odisha, India |
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| Abstract: | BackgroundPrimary biliary cholangitis (PBC) is an autoimmune disease of the liver characterized by destructive lymphocytic cholangitis and anti-mitochondrial antibodies (AMA). Anti-gp210 and anti-Sp100, are used for the diagnosis of PBC in AMA-negative PBC patients. Patients with PBC have a propensity to have an extrahepatic manifestation which is especially autoimmune.ObjectiveWe aimed to determine the frequency of serological markers of rheumatoid arthritis (RA) (CCP-Ab or RF) in PBC patients and to do the vice versa.MethodsOur PBC study included 70 patients with PBC and 80 healthy blood donors (HBD) and our RA study included 75 patients with RA and 75 HBD. Anti-cyclic citrullinated peptide antibodies (CCP-Ab) and rheumatoid factor (RF) were performed by indirect ELISA. AMA, anti-Sp100 and anti-gp210 were determined by indirect immunofluorescence.ResultsRA autoantibodies (CCP-Ab or RF) were more frequent in PBC patients than in HBD (65.7% vs. 8.7% p 〈1 0 −6). CCP-Ab were significantly more frequent in patients than in controls (15.7% vs. 2.5%; p = 0.004). Nine patients had both CCP-Ab and RF vs. none of controls (12.8% vs. 0%; p = 0.001). RF were detected in 45 patients with PBC and in 5 HBD (64.3% vs. 6.2%; p 〈1 0 −6). In PBC patients, RF were more frequent than CCP-Ab (64.3% vs. 15.7%; p 〈1 0 −6). RF-IgG were present in 18.5% of patients; RF-immunoglobulin (Ig) A in 34.3% and RF-IgM in 54.3%. These frequencies were significantly higher than those found in control group (1.2% for RF-IgG (p 〈1 0 −3); 0% for RF-IgA (p 〈1 0 −6); and 6.2% for RF-IgM (p 〈1 0 −6)). In our PBC patients, RF-IgA were more frequent than RF-IgG (34.3% vs. 18.5%; p = 0.03) and than CCP-Ab (34.3% vs. 15.7%; p = 0.01). Six patients had only RF-IgA versus none of the control group (8.6% vs. 0%; p = 0.01). AMA, anti-Sp100 and anti-gp 210 were absent in all RA patients.ConclusionsSerological markers of RA were more frequent in PBC patients than in HBD and the vice versa was not true. |
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| Keywords: | Primary biliary cholangitis Rheumatoid arthritis Rheumatoid factor Anti-cyclic citrullinated peptide antibodies Anti-mitochondrial antibodies |
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