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Öğe Assesment of oxidative status and its association with thyroid autoantibodies in patients with euthyroid autoimmune thyroiditis(Springer, 2015) Baser, Husniye; Can, Ummugulsum; Baser, Salih; Yerlikaya, Fatma Humeyra; Aslan, Uysaler; Hidayetoglu, Bahauddin TahaOxidative stress results from either overproduction of free radicals or insufficiency of several antioxidant defense systems. It leads to oxidation of main cellular macromolecules and a resultant molecular dysfunction. Thyroid hormones regulate oxidative metabolism and, thus, play a role in free radical production. Studies evaluating oxidative stress in patients with hypothyroidism and hyperthyroidism have been encountered in recent years; however, oxidative status in patients with euthyroid autoimmune thyroiditis (AIT) was not investigated previously. Thirty-five subjects with euthyroid AIT and 35 healthy controls were enrolled in the study. Serum oxidative status was determined by the measurement of total anti-oxidant status (TAS), total oxidant status (TOS), ischemia-modified albumin (IMA), and oxidized-low density lipoprotein (ox-LDL) levels. Serum TAS levels were significantly lower (p < 0.001), while serum TOS levels and IMA levels were significantly higher (p < 0.001 and p = 0.020, respectively) in patients compared to controls. In both groups, ox-LDL levels were similar (p = 0.608). Serum TAS levels were negatively correlated with antithyroid peroxidase and anti-thyroglobulin (anti-TG) levels (rho = -0.415, p = 0.001 and rho = -0.484, p < 0.001, respectively). Serum TOS was positively correlated with anti-TG levels (rho = 0.547, p < 0.001). Further, TAS was positively correlated with free T4 levels (r = 0.279, p = 0.043). No correlation was observed between thyrotropin, free T3 levels, and TOS and TAS levels. These results suggest that oxidants are increased, and anti-oxidants are decreased in patients with euthyroid AIT, and oxidative/anti-oxidative balance is shifted to the oxidative side. Increased oxidative stress might have a role in thyroid autoimmunity.Öğe Evaluation of oxidant/anti-oxidants status in patients with mild acute pancreatitis(Univ Catholique Louvain-Ucl, 2016) Baser, Husniye; Can, Ummugulsum; Karasoy, Deniz; Ay, Abdulhalim Serden; Baser, Salih; Yerlikaya, Fatma Humeyra; Ecirli, SamilBackground and aim : Acute pancreatitis (AP), an inflammatory disorder of the pancreas, is associated with significant morbidity and mortality. The pathogenesis of AP has been suggested to involve high oxidative stress (OS), combined with inadequate antioxidant status. We aimed to investigate the levels of serum total anti-oxidant status (TAS), total oxidant status (TOS) and ischemia-modified albumin (IMA) in patients with mild AP. Methods : Thirty subjects with mild AP and 29 healthy controls were enrolled into the study. The levels of TAS, TOS and IMA, Creactive protein (CRP), high sensitivity CRP (hs-CRP) and fibrinogen were measured in both groups. Results : TAS levels were significantly lower (p = 0.037), while IMA levels were significantly higher (p < 0.001) in patients, compared to controls. TOS levels were similar between two groups. Fibrinogen, CRP and hs-CRP levels were significantly higher in patients than those of controls (p < 0.001 for all parameters). IMA levels were positively correlated with amylase and lipase levels (r = 0.448, p = 0.001 and r = 0.469, p < 0.001, respectively). There was a negative correlation between TAS levels, and amylase and lipase levels (r = -0.277, p = 0.035 and r = -0.278, p = 0.034, respectively). Conclusions : OS is reported to be associated with the inflammatory process and the severity of AP. In our study, among OS parameters, an increase in IMA levels and a decrease in TAS levels were observed in mild AP patients.Öğe Serum total oxidant/anti-oxidant status, ischemia-modified albumin and oxidized-low density lipoprotein levels in patients with vitamin D deficiency(Sbem-Soc Brasil Endocrinologia & Metabologia, 2015) Baser, Husniye; Can, Ummugulsum; Baser, Salih; Hidayetoglu, Bahauddin Taha; Aslan, Uysaler; Buyuktorun, Ilker; Yerlikaya, Fatma HumeyraObjective: Oxidative damage may be responsible for the pathogenesis and complications of many diseases. Vitamin D deficiency has been suggested as a potential mediator of various extra-skeletal pathologies. However, there are limited data on anti-oxidant properties of vitamin D. Materials and methods: Forty-one subjects with vitamin D deficiency and 30 healthy controls were enrolled into the study. The levels of total anti-oxidant status (TAS), total oxidant status (TOS), ischemia-modified albumin (IMA), oxidized-low density lipoprotein (ox-LDL), high-sensitivity C-reactive protein (hs-CRP) and fibrinogen were measured in both groups. The measurements were repeated in 17 patients after the replacement of vitamin D. Results: Serum IMA and TOS levels were significantly higher (p < 0.001 and p = 0.035, respectively), while TAS levels were significantly lower in patients, compared to controls (p < 0.001). Additionally, fibrinogen was significantly higher in patients than controls (p = 0.003), while ox-LDL and hs-CRP levels were similar between two groups. After the replacement of vitamin D, TAS level significantly increased (p = 0.037), and TOS and fibrinogen levels significantly decreased (p = 0.043 and p = 0.010, respectively). Vitamin D levels were negatively correlated with IMA and fibrinogen levels (r = -0.500, p < 0.001 and r = -0.391, p = 0.002, respectively), although positively correlated with TAS levels (r = 0.430, p < 0.001). No correlation was found between vitamin D levels, and the TOS, ox-LDL and hs-CRP levels. Conclusions: In this study, while serum IMA, TOS and fibrinogen levels were increased, TAS levels were seen to be decreased in patients with vitamin D deficiency. These results suggest that oxidative/anti-oxidative balance shifts in favours of oxidative status in vitamin D deficiency.Öğe Serum total oxidant/anti-oxidant status, ischemia-modified albumin and oxidized-low density lipoprotein levels in patients with vitamin D deficiency(Sbem-Soc Brasil Endocrinologia & Metabologia, 2015) Baser, Husniye; Can, Ummugulsum; Baser, Salih; Hidayetoglu, Bahauddin Taha; Aslan, Uysaler; Buyuktorun, Ilker; Yerlikaya, Fatma HumeyraObjective: Oxidative damage may be responsible for the pathogenesis and complications of many diseases. Vitamin D deficiency has been suggested as a potential mediator of various extra-skeletal pathologies. However, there are limited data on anti-oxidant properties of vitamin D. Materials and methods: Forty-one subjects with vitamin D deficiency and 30 healthy controls were enrolled into the study. The levels of total anti-oxidant status (TAS), total oxidant status (TOS), ischemia-modified albumin (IMA), oxidized-low density lipoprotein (ox-LDL), high-sensitivity C-reactive protein (hs-CRP) and fibrinogen were measured in both groups. The measurements were repeated in 17 patients after the replacement of vitamin D. Results: Serum IMA and TOS levels were significantly higher (p < 0.001 and p = 0.035, respectively), while TAS levels were significantly lower in patients, compared to controls (p < 0.001). Additionally, fibrinogen was significantly higher in patients than controls (p = 0.003), while ox-LDL and hs-CRP levels were similar between two groups. After the replacement of vitamin D, TAS level significantly increased (p = 0.037), and TOS and fibrinogen levels significantly decreased (p = 0.043 and p = 0.010, respectively). Vitamin D levels were negatively correlated with IMA and fibrinogen levels (r = -0.500, p < 0.001 and r = -0.391, p = 0.002, respectively), although positively correlated with TAS levels (r = 0.430, p < 0.001). No correlation was found between vitamin D levels, and the TOS, ox-LDL and hs-CRP levels. Conclusions: In this study, while serum IMA, TOS and fibrinogen levels were increased, TAS levels were seen to be decreased in patients with vitamin D deficiency. These results suggest that oxidative/anti-oxidative balance shifts in favours of oxidative status in vitamin D deficiency.Öğe SERUM UROKINASE-TYPE PLASMINOGEN ACTIVATOR RECEPTOR IN PATIENTS WITH ACUTE PANCREATITIS(Nobel Ilac, 2021) Can, Ummugulsum; Baser, Salih; Yerlikaya, Fatma Humeyra; Karasoy, DenizObjective: Acute pancreatitis (AP) is an inflammatory disease in which digestive enzymes produced by pancreas destroy the gland via protease pancreatic au todigestion. Soluble urokinase-type plasminogen activator receptor (suPAR), an inflammatory biomarker, is responsible for various immunological functions, including inflammation, cell adhesion, migration and proteolysis. The main goal of our study was to evaluate serum suPAR level in patients with mild AP, compared with controls. Material and Method: The study was performed on 40 patients with mild AP and 50 healthy controls. Controls were matched with patients as to age and body mass index (BMI). The diagnosis of AP was established under the Ranson criteria. Serum suPAR levels were measured through ELISA method. Results: Serum suPAR levels of patients were significantly higher than those of control subjects (4.81 +/-.3.30; 1.98 +/- 1. 78 ng/ml, respectively) (p<0.001). No significant correlation was found between suPAR levels, amylase, lipase, CRP, hs-CRP and fibrinogen levels (p>0.05 for all parameters). Conclusion: Our study indicated that serum suPAR may play an important role in the inflammatory process in AP, and suPAR could be used as a clinically beneficial marker in the diagnosis of AP.