Open AccessSerum amyloid A as a marker of ankylosing spondylitis activity
Author(s) -
К. В. Сахарова,
М. В. Черкасова,
Ш. Ф. Эрдес
Publication year - 2021
Publication title -
sovremennaâ revmatologiâ
Language(s) - English
Resource type - Journals
eISSN - 2310-158X
pISSN - 1996-7012
DOI - 10.14412/1996-7012-2021-6-72-75
Subject(s) - ankylosing spondylitis , serum amyloid a , serum amyloid a protein , medicine , amyloidosis , acute phase protein , basdai , gastroenterology , aa amyloidosis , c reactive protein , inflammation , spondylitis , endocrinology , immunology , disease , familial mediterranean fever , psoriatic arthritis
Serum amyloid A protein A (SAA) is a normal serum protein (serving as a precursor of fibrillar tissue protein AA), synthesized in the liver and a rapidly responding marker of the acute phase of inflammation. A constant high concentration of SAA is one of the factors in the development of AA-amyloidosis. As a rule, secondary amyloidosis develops in patients with long-term and poorly controlled inflammatory diseases, including rheumatic diseases, one of which is ankylosing spondylitis (AS). Objective : to assess the level of SAA in AS patients and its relationship with indicators of disease activity. Patients and methods . The study included 124 patients with AS who met the modified New York 1984 criteria. The disease activity and functional status of patients were assessed according to the recommendations of Russian experts. SAA and CRP, ESR in blood serum were measured in all patients. Results and discussion . The median SAA concentration was 12.5 mg/L [4; 71.6]. Of 124 patients, 31% had SAA levels 5 mg/L. A strong correlation was found between the levels of SAA and CRP (r=0.80, p<0.1), no significant relationship was found between SAA and ESR (r=0.31, p=0.92). The correlation between the AS activity according to the BASDAI index and SAA was weak (r=0.3, p<0.002), the correlation with ASDAS-CRP was moderate (r=0.54, p<0.00001). Conclusion . A statistically significant relationship was found between SAA and CRP levels, as well as the AS activity indices. Research has shown that SAA can be used as one of the markers of inflammation in AS.