Impaired kynurenine metabolism in patients with primary Sjögren's syndrome.

Autor: Eryavuz Onmaz D; Department of Biochemistry, Selcuk University, Faculty of Medicine, Konya 42130, Turkey. Electronic address: duygu_eryavuz@hotmail.com., Tezcan D; Division of Rheumatology, Selcuk University, Faculty of Medicine, Konya 42130, Turkey., Abusoglu S; Department of Biochemistry, Selcuk University, Faculty of Medicine, Konya 42130, Turkey., Sak F; Department of Biochemistry, Selcuk University, Faculty of Medicine, Konya 42130, Turkey., Humeyra Yerlikaya F; Department of Biochemistry, Selcuk University, Faculty of Medicine, Konya 42130, Turkey., Yilmaz S; Division of Rheumatology, Selcuk University, Faculty of Medicine, Konya 42130, Turkey., Abusoglu G; Department of Medical Laboratory Techniques, Selcuk University, Vocational School of Health, Konya 42130, Turkey., Kazim Korez M; Division of Biostatistics, Faculty of Medicine, Selcuk University, Konya 42130, Turkey., Unlu A; Department of Biochemistry, Selcuk University, Faculty of Medicine, Konya 42130, Turkey.
Jazyk: angličtina
Zdroj: Clinical biochemistry [Clin Biochem] 2023 Apr; Vol. 114, pp. 1-10. Date of Electronic Publication: 2023 Jan 18.
DOI: 10.1016/j.clinbiochem.2023.01.007
Abstrakt: Objectives: Primary Sjögren's syndrome (pSS) is an autoinflammatory disease characterized by inflammation of the exocrine glands. Elevated inflammation causes an increase in kynurenine pathway (KP) metabolite levels by activating indoleamine 2,3-dioxygenase (IDO). The aim of this study was to measure serum KP metabolite concentrations in patients with pSS and to evaluate the relationship between these metabolites with disease activity score and clinical manifestations.
Design & Methods: A total of 80 patients with pSS and 80 healthy controls were enrolled in this study. Serum tryptophan (TRP), kynurenine (KYN), kynurenic acid (KYNA), 3-hydroxyanthranilic acid (3HAA), 3-hydroxykynurenine (3HK), quinolinic acid (QUIN) concentrations were quantified with liquid chromatography with tandem mass spectrometry (LC-MS/MS). Demographic characteristics, clinical manifestations and disease activity score (ESSDAI) of the participants were recorded.
Results: The serum level of KYN and QUIN were significantly higher in patients with pSS with low and moderate activity compared those healthy controls, while the serum level of TRP, KYNA/KYN and 3HK/KYN were lower. In addition, the significant difference for the serum level of KYNA was only in patients with moderate activity from healthy controls, and the difference was higher in favor of pSS patients. Moreover, the KYN/TRP levels were significantly increased with disease activity. The ESSDAI score was positively correlated with KYN/TRP ratio, but negatively correlated with KYNA/KYN ratio.
Conclusions: These findings indicated that KP metabolites may play a role in the etiopathogenesis, activation and progression of pSS.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 The Canadian Society of Clinical Chemists. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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