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    Evaluation of serum thiol/disulfide homeostasis in patients with ankylosing spondylitis by a novel method
    (Kare Publ, 2019) Baykara, Rabia Aydogan; Tuzcu, Ayca; Omma, Ahmet; Acet, Gunseli Karaca; Dogan, Erdal; Aydin, Almila; Cure, Medine Cumhur
    OBJECTIVE: Increased reactive oxygen species may play an important role in Ankylosing spondylitis (AS) etiopathogenesis. The thiol group is a very potent antioxidant. In this study, we aimed to investigate the presence of oxidative stress in patients with AS by evaluating thiol/disulfide homeostasis. METHODS: In this study, a total of 66 AS patients (27 male, 39 female) and 66 healthy controls (21 male, 45 female) were enrolled. Recently, a novel method for the thiol measurement was found. Thiol and disulfide values were measured by the novel methods. RESULTS: Native thiol (NT) (p<0.001) and native thiol/total thiol (NTT) (p<0.001) levels of AS patients were significantly lower compared to the values of the healthy group. However, disulfide (p<0.001), disulfide/native thiol (DNT) (p<0.001) and disulfide/total thiol (DTT) levels of AS patients were a strongly higher control group. A negative correlation was found between BASFI and NTT. Also, a negative correlation was found between BASDAI and NT, NTT levels. A positive correlation was found between BASFI and disulfide, DNT and DTT levels. A positive correlation was found between BASFI and disulfide, DNT and DTT levels. CONCLUSION: The findings revealed that thiol-disulfide homeostasis deteriorated in patients with AS in favor of disulfide amounts. Thiol-disulfide homeostasis can play roles in the etiology and severity of AS.
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    Evaluation of serum thiol/disulfide homeostasis in patients with ankylosing spondylitis by a novel method
    (Kare Publ, 2019) Baykara, Rabia Aydogan; Tuzcu, Ayca; Omma, Ahmet; Acet, Gunseli Karaca; Dogan, Erdal; Aydin, Almila; Cure, Medine Cumhur
    OBJECTIVE: Increased reactive oxygen species may play an important role in Ankylosing spondylitis (AS) etiopathogenesis. The thiol group is a very potent antioxidant. In this study, we aimed to investigate the presence of oxidative stress in patients with AS by evaluating thiol/disulfide homeostasis. METHODS: In this study, a total of 66 AS patients (27 male, 39 female) and 66 healthy controls (21 male, 45 female) were enrolled. Recently, a novel method for the thiol measurement was found. Thiol and disulfide values were measured by the novel methods. RESULTS: Native thiol (NT) (p<0.001) and native thiol/total thiol (NTT) (p<0.001) levels of AS patients were significantly lower compared to the values of the healthy group. However, disulfide (p<0.001), disulfide/native thiol (DNT) (p<0.001) and disulfide/total thiol (DTT) levels of AS patients were a strongly higher control group. A negative correlation was found between BASFI and NTT. Also, a negative correlation was found between BASDAI and NT, NTT levels. A positive correlation was found between BASFI and disulfide, DNT and DTT levels. A positive correlation was found between BASFI and disulfide, DNT and DTT levels. CONCLUSION: The findings revealed that thiol-disulfide homeostasis deteriorated in patients with AS in favor of disulfide amounts. Thiol-disulfide homeostasis can play roles in the etiology and severity of AS.
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    A novel marker relationship between carotid intima-media thickness and disease activity score-28 in patients with rheumatoid arthritis: human endothelial cell-specific molecule-1
    (Tubitak Scientific & Technological Research Council Turkey, 2019) Tuzcu, Goksel; Uslu, Ali Ugur; Tuzcu, Ayca; Baykara, Rabia Aydogan; Omma, Ahmet; Kucuk, Adem
    Background/aim: Human endothelial cell-specific molecule-1 (endocan) is a marker of vascular endothelial dysfunction that may be used in the evaluation of inflammatory-associated atherosclerotic lesions. Endocan may be a marker for the evaluation of atherosclerosis and disease activity in rheumatoid arthritis (RA) patients. Materials and methods: We included 39 RA patients assessed according to the American College of Rheumatology/European League Against Rheumatology 2010 diagnostic criteria and recruited 30 age- and sex-matching healthy subjects for the control group. Results: Endocan values were 14.11 +/- 3.27 for the RA patients and 12.10 +/- 2.92 for the controls. The endocan values of the patients were significantly higher than those of the control group (P = 0.009). In the correlation analysis, endocan showed a significantly positive correlation with disease activity score-28 (r = 0.386, P = 0.029) and carotid intima-media thickness (cIMT) (r = 0.419, P = 0.008). Linear regression analysis revealed that there was an independent relationship between endocan and cIMT (P = 0.029). Conclusion: Endocan can be a marker for early atherosclerosis and disease activity in RA patients.
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    PsART-ID inception cohort: clinical characteristics, treatment choices and outcomes of patients with psoriatic arthritis
    (Oxford Univ Press, 2021) Ayan, Gizem; Aydin, Sibel Zehra; Kimyon, Gezmis; Ozisler, Cem; Tinazzi, Ilaria; Dogru, Atalay; Omma, Ahmet
    Objectives. Our aim is to understand clinical characteristics, real-life treatment strategies, outcomes of early PsA patients and determine the differences between the inception and established PsA cohorts. Methods. PsArt-ID (Psoriatic Arthritis- International Database) is a multicentre registry. From that registry, patients with a diagnosis of PsA up to 6 months were classified as the inception cohort (n=388). Two periods were identified for the established cohort: Patients with PsA diagnosis within 5-10 years (n = 328), >= 10 years (n = 326). Demographic, clinical characteristics, treatment strategies, outcomes were determined for the inception cohort and compared with the established cohorts. Results. The mean (S.D.) age of the inception cohort was 44.7 (13.3) and 167/388 (43.0%) of the patients were male. Polyarticular and mono-oligoarticular presentations were comparable in the inception and established cohorts. Axial involvement rate was higher in the cohort of patients with PsA >= 10 years compared with the inception cohort (34.8% vs 27.7%). As well as dactylitis and nail involvement (P = 0.004, P = 0.001 respectively). Both enthesitis, deformity rates were lower in the inception cohort. Overall, 13% of patients in the inception group had a deformity. MTX was the most commonly prescribed treatment for all cohorts with 10.7% of the early PsA patients were given anti-TNF agents after 16 months. Conclusion. The real-life experience in PsA patients showed no significant differences in the disease pattern rates except for the axial involvement. The dactylitis, nail involvement rates had increased significantly after 10 years from the diagnosis and the enthesitis, deformity had an increasing trend over time.
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    Psoriasis Symptom Inventory (PSI) as a patient-reported outcome in mild psoriasis: Real life data from a large psoriatic arthritis registry
    (Aves, 2020) Aydin, Sibel Zehra; Kimyon, Gezmis; Ozisler, Cem; Tarhan, Emine Figen; Gunal, Esen Kasapoglu; Kucuk, Adem; Omma, Ahmet
    Objective: Our aim is to test the validity of the Psoriasis Symptom Inventory (PSI), a patient-reported outcome, to assess the psoriasis severity within the scope of rheumatology. Methods: Within the PsA international database (PSART-ID), 571 patients had PSI, while 322 of these also showed body surface area (BSA). Correlations between PSI, BSA, and other patient- and physician-reported outcomes were investigated. Results: There was a good correlation between PSI and BSA (r=0.546, p<0.001), which was even higher for mild psoriasis (BSA<3 (n=164): T-0.608, p<0.001). PSI significantly correlated with fatigue, pain, and patient and physician global parameters (p<0.001). Conclusion: PSI has a good correlation with other patient- and physician-reported outcomes, and our findings support its use in rheumatology practice.
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    The relationship of serum visfatin levels with clinical parameters, flow-mediated dilation, and carotid intima-media thickness in patients with ankylosing spondylitis
    (Tubitak Scientific & Technological Research Council Turkey, 2021) Aydogan Baykara, Rabia; Kucuk, Adem; Tuzcu, Ayca; Tuzcu, Goksel; Cure, Erkan; Uslu, Ali Ugur; Omma, Ahmet
    Background/aim: Atherosclerotic heart diseases can occur at an early age in patients with ankylosing spondylitis (AS). Flow-mediated dilation (FMD) and carotid intima-media thickness (cIMT) values are reliable markers for early detection of subclinical atherosclerosis in patients with AS. We aimed to investigate the relationship between visfatin levels and indirect markers of subclinical atherosclerosis and endothelial dysfunction in patients with AS. Materials and methods: Forty-two patients diagnosed with AS and 42 age, sex, and body mass index (BMI)-matched controls were included in the study. Visfatin levels, FMD, and cIMT were measured using appropriate methods. Results: Visfatin levels of the patients were significantly higher than controls (p < 0.001). FMD values in patients with AS were significantly lower (p = 0.007) whereas cIMT were significantly higher than the controls (p = 0.003). There was a negative relationship between FMD with visfatin levels (p = 0.004), BASDAI (p = 0.010), and BASFI (p = 0.007). There was a positive relationship between cIMT with visfatin (p = 0.005), BASDAI (p < 0.001), and BASFI (p < 0.001). There was a positive relationship between visfatin with BASDAI (p < 0.001), and BASFI (p < 0.001). Conclusion: Visfatin levels are increased and associated with impaired FMD and increased cIMT in patients with AS. Increased visfatin levels may be associated with subclinical atherosclerosis in AS.