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M O Oztas

Publications and source records attributed to M O Oztas.

7 recordsLinked to original sources
PubMed2005

Serum interleukin 18 and tumour necrosis factor-alpha levels are increased in Behcet's disease.

Inflammation in Behcet's disease is thought to be mediated by cytokines derived from T-helper type 1 (Th1) lymphocytes. In this study, we tried to determine serum interleukin (IL)-18 and tumour necrosis factor (TNF)-alpha levels of patients with Behcet's disease. Twenty-seven patients with active Behcet's disease, and 20 healthy control subjects were included in this study. Differences between mean serum IL-18 and TNF-alpha level of patients with Behcet's disease were significantly increased when compared with the control group. A significant correlation was found between serum IL-18 and TNF-alpha levels of Behcet patients (rs = 0.627, P < 0.0001). IL-18 and TNF-alpha levels may be related to disease pathogenesis. Increased levels of IL-18 also support Th1 predominance in Behcet's disease.

Adult↗
PubMed2003

The role of free oxygen radicals in the aetiopathogenesis of rosacea.

A possible link between superoxide dismutase activity and malondialdehyde level with the clinical manifestations of rosacea was investigated. We found differences in superoxide dismutase activities between mild rosacea (stages I and II) and severe involvement (stage III) groups, as well as between disease and control groups that were statistically significant (P < 0.05). In the mild involvement group (stages I and II), the superoxide dismutase activity was higher than in the control group (P < 0.05), while the malondialdehyde levels did not differ from the control. In the severe involvement group (stage III), the superoxide dismutase activity was lower than in the control group (P < 0.05), and this was coupled to a raised level of malondialdehyde (P < 0.05). These findings clearly show that in the mild involvement phase of rosacea patients, superoxide dismutase activity was stimulated to protect the skin against reactive oxygen species so that the malondialdehyde levels were maintained. In contrast, in more severe disease, due to a decrease in the capacity of the antioxidant defence system, the malondialdehyde levels were increased. These findings support the 'antioxidant system defect hypothesis' in rosacea patients.

Adult↗
PubMed2003

Nitric oxide levels in Behçet's disease.

Behçet's disease (BD) is a chronic multisystemic disorder which is characterized by a relapsing systemic inflammatory process. In certain inflammatory conditions such as rheumatoid arthritis, over production of nitric oxide (NO) could damage host cells and tissues, either directly and/or following reaction with other free radicals, such as superoxide anion to form species including peroxynitrite or hydroxyl radicals. Excessive superoxide radical production and impaired antioxidant mechanism in both the neutrophils and plasma of patients with BD have been reported. Our study was designed to investigate the role of NO in BD. NO is an extremely unstable molecule and rapidly converted in vivo and in vitro to nitrate (NO3-) and nitrite (NO2-). For this reason serum NO2- and NO3- have been used as an index of NO generation. We measured serum nitrate + nitrite levels, by using an enzymatic one-step methodology based on the reduction of nitrate to nitrite by nitrate reductase from Aspergillus species, in the presence of beta-NADPH. When compared to healthy controls, serum nitrate + nitrite levels were found to be higher in active periods of BD patients (P < 0.01). It was concluded that increased NO production in patients with BD might have critical biological activities relevant to vasculitic events in the active period of disease.

Adult↗
PubMed2000

Stress and skin diseases in musicians: evaluation of the beck depression scale, general psychologic profile (the brief symptom inventory [BSI]), beck anxiety scale and stressful life events in musicians.

We had previously investigated skin problems of musicians (N = 117) working in a professional orchestra. The results of this survey suggest a significant incidence of occupational and stress-related skin problems in musicians such as hyperhydrosis, lichen planus, psoriasis, seborrheic dermatitis and urticaria. It was thought that emotional factors exacerbate their problems [6]. This article discusses the importance of psychiatric consultations in dermatologic problems.

Adolescent↗