Peculiarities of steroid spectrum dynamics in patients with rheumatoid arthritis taking long-term systemic glucocorticoids
Abstract. Long-term (more than 3 months) use of glucocorticoids (GCs) in patients with rheumatoid arthritis (RA) is the most common cause of adrenal insufficiency (AI). High-performance liquid chromatography (HPLC) allows for the determination of a spectrum of steroid hormones at low concentrations, minimizing cross-reactions, which opens up new possibilities for an objective estimation of adrenal function.Mazurov V.I., Morozova K.P., Strelnikova E.G., Melnikov E.S.
The aim: to determine the dynamics of the adrenal steroid hormone spectrum in patients with RA taking long-term systemic GCs and to identify the most informative GCs for AI diagnosis.
Material and methods. The study included 34 patients with RA (mean age 58.1 ± 9.6 years; 76.5% females) receiving combination therapy with olokizumab, methotrexate, and prednisolone. The duration of continuous prednisolone treatment was 41 [21.5; 51.0] months at a dose of 8.75 [5; 10] mg daily. Steroid profile was assessed by HPLC at two checkpoints: after achieving low RA activity and after 6 months while reducing GC dose.
Results. Cortisol deficiency was detected in 14.7% of patients, and cortisone levels were decreased in 47.1%, which could serve as laboratory evidence of AI presence. A repeat study after 6 months while reducing/discontinuing GC dose revealed a statistically significant increase in cortisone (p = 0.002) and corticosterone (p = 0.025) levels in 73.5% of patients. Complete withdrawal of systemic GCs was achieved in 73.5% of patients, while disease activity remained low.
Discussion and conclusion. HPLC method for assessing the steroid profile enables the timely diagnosis of rheumatoid arthritis and an objective estimation of adrenal function recovery with a reduction of glucocorticoid dose. Achieving stable remission or low RA activity with effective therapy allows for the successful reduction and withdrawal of glucocorticoids use, with restoration of adrenal function under clinical and laboratory monitoring.
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References
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About the Authors
Vadim I. Mazurov, MD, Dr.Sci. (Medicine), professor, academician of RAS, vice president of RSMSIM, chief scientific advisor, director of the Research institute of rheumatology, head of the Department of therapy and rheumatology named after E.E. Eichwald, I.I. Mechnikov North-Western State Medical University of the Ministry of Healthcare of Russia; head of the Center for Autoimmune Diseases, V.A. Nasonova Clinical Rheumatology Hospital No. 25 (Saint Petersburg); chief external expert – rheumatologist at the Healthcare Committee of the Government of Saint Petersburg, Honored Scientist of the Russian Federation. Address: 191015, Saint Petersburg, 41 Kirochnaya St.E-mail: maz.nwgmu@yandex.ru
ORCID: https://orcid.org/0000-0002-0797-2051. Scopus Author ID: 16936315400. eLibrary SPIN: 6823-5482
Kira P. Morozova, MD, postgraduate student of the Department of therapy and rheumatology named after E.E. Eichwald, I.I. Mechnikov North-Western State Medical University of the Ministry of Healthcare of Russia; rheumatologist at V.A. Nasonova Clinical Rheumatology Hospital No. 25 (Saint Petersburg). Address: 190068, Saint Petersburg, 30 Bolshaya Podyacheskaya St.
E-mail: kiramoroz194@gmail.com
ORCID: https://orcid.org/0000-0002-4113-3104
Elena G. Strelnikova, PhD (Chemistry), senior researcher at the Department of chromatography research, I.I. Mechnikov North-Western State Medical University of the Ministry of Healthcare of Russia. Address: 191015, Saint Petersburg, 41 Kirochnaya St.
Email: Istrelnikova@inbox.ru
ORCID: https://orcid.org/0000-0002-1208-8092. Scopus Author ID: 58864205400. SPIN: 6631-6962
Evgeny S. Melnikov, MD, PhD (Medicine), assistant at the Department of therapy and rheumatology named after E.E. Eichwald, I.I. Mechnikov North-Western State Medical University of the Ministry of Healthcare of Russia; rheumatologist at V.A. Nasonova Clinical Rheumatology Hospital No. 25 (Saint Petersburg). Address: 190068, Saint Petersburg, 30 Bolshaya Podyacheskaya St.
Email: emelnikov@euat.ru
ORCID: https://orcid.org/0000-0002-8521-6542



