Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleYalnız künye2021The effect of homocysteine on the expression of CD36, PPARγ, and C/EBPα in adipose tissue of normal and obese mice
Mentese, Ahmet; Dogramaci, Seniz; Demir, Selim; Yaman, Serap Ozer; Ince, Imran; Altay, Diler Us; Erdem, Mehmet; Turan, Ibrahim; Alver, Ahmet
The purpose of this study was to investigate the effect of homocysteine (Hcy) on CD36, PPARγ, and C/EBPα gene and protein expression in adipose tissue obtained from normal and high-calorie diet obesity models. CD36, PPARγ, and C/EBPα gene expression and protein levels in adipose tissue specimens were determined using the RT-PCR and ELISA methods, respectively. Significantly increased CD36 gene expression was observed in adipose tissue from obese mice, while Hcy significantly reduced CD36 gene expression in adipose tissue from normal and obese mice. PPARγ and C/EBPα gene expression levels decreased significantly in all groups compared to the normal group. In addition, levels of both PPARγ and C/EBPα gene expression were lower with Hcy supplementation compared to their own controls. In conclusion, Hcy’s reduction of CD36 gene expression in adipose tissue may be one probable factor in hyperhomocysteinemia representing an independent risk factor for cardiovascular diseases.
- MakaleAçık Erişim2017Morus rubra extract induces G1 cell cycle arrest and apoptosis in human lung and prostate cancer cells
Turan, Ibrahim; Demir, Selim; Kilinc, Kagan; Aliyazicioglu, Yuksel; Alver, Ahmet; Misir, Sema; Yaman, Serap Ozer; Akbulut, Kubra; Mentese, Ahmet; Deger, Orhan
Objective: Cancer is one of the most deadly types of disease and evasion from apoptosis and unstoppable cell proliferation are accepted as its distinctive features. Many studies have evaluated the cytotoxic effect of different Morus species but, there is no study about cytotoxic effect of Morus rubra. In this study we aimed to evaluate phenolic composition, antioxidant properties and cytotoxic effect of acidified dimethyl sulfoxide extract of M. rubra (AMRE). Method: Antioxidant properties, phenolic composition and cytotoxic effect of AMRE were determined using spectrophotometric methods, HPLC, and MTT assay, respectively. Then, mechanisms of cytotoxic effect of AMRE on human prostate (PC-3) and lung (A549) cancer cells were examined in regard to cell cycle, apoptosis and mitochondrial membrane potential using flow cytometric methods. Results: Total phenolic content and reducing power values were 11.9 mg gallic acid equivalents and 42.9 mg trolox equivalents per g sample, respectively. Ascorbic and gallic acid were detected in AMRE as major antioxidant compounds. We determined that AMRE increased cell cycle arrest at G1 phase and exhibited apoptotic features via decreasing mitochondrial membrane potential in both prostate and lung cancer cells. Conclusion: These findings demonstrate that M. rubra extract can affect the behavior of human prostate and lung cancer cells in vitro conditions, and this effect now needs to be investigated in vivo.
- MakaleAçık Erişim2017Detection of autoantibodies against carbonic anhydrase I and II in the plasma of patients with gastric cancer
Mentese, Ahmet; Fidan, Evren; Alver, Ahmet; Demir, Selim; Yaman, Serap Ozer; Sumer, Aysegul; Fidan, Sami; Kavgaci, Halil; Turan, Ibrahim
Cancer is the second leading cause of death and gastric cancer is the fourth most common cancer type worldwide. Investigation of autoantibodies in cancer patients has been a popular research area in recent years. The aim of the current study was to investigate carbonic anhydrase I and II (CA I and II) autoantibodies in the plasma of subjects with gastric cancer based on the information and considerations of autoimmune relation of gastric cancer. Anti-CA I and II antibody levels were investigated by ELISA in plasma samples of fifty two patients with gastric cancer and thirty five healthy peers. Anti-CA I and II antibody titers of the gastric cancer group were significantly higher compared with the control group (p = 0.004, p = 0.0001, respectively). Plasma anti-CA I levels of the metastatic group were lower than the non-metastatic group and this difference was found statistically significant (p < 0.05), but there was no statistical difference between plasma anti-CA II levels of the groups. CA I and II autoantibody titers in patients with gastric cancer were found higher compared to healthy subjects and the results suggest that these autoantibodies may be involved in the pathogenesis of gastric cancer.
- MakaleYalnız künye2016Systemic oxidant/antioxidant balance in human abdominal aortic aneurysm
Menteşe, Umit; Turan, Ibrahim; Usta, Sefer; Demir, Selim; Koral, Özgür; Öztaş Menteşe, Seda; Çavuşoǧlu, Ismail Gökhan; Karahan, Süleyman Caner; Alver, Ahmet; Doǧan, Orhan Veli
The aim of this study was to evaluate the oxidant-antioxidant balance in patients with abdominal aortic aneurysms (AAA). Forty-two consecutive patients with AAA and 46 control subjects were included. Total oxidant status (TOS) and total antioxidant status (TAS) levels were measured and the oxidative stress index (OSI) value determined. Serum TOS and OSI values in patients with AAA were higher than those in the controls (p<0.001, p<0.001, respectively). There was a positive correlation between abdominal aortic diameters, serum TOS levels (r=0.592, p<0.001) and OSI values (r=0.598, p<0.001). A cut-off value of 17.68 μmol H2O2 equivalent/L for TOS was associated with 86% sensitivity and 83% specificity and a cut-off value of 1.77 for OSI was associated with 86% sensitivity and 81% specificity for predicting AAA. Systemic oxidative imbalance develops in patients with AAA, particularly as a result of an increase in TOS.
- MakaleYalnız künye2015Evaluation of oxidative stress balance in acute deep vein thrombosis
Doğan, Orhan Veli; Doğan, Süheyla; Coşkun, Ceyhun; Menteşe, Seda Öztaş; Menteşe, Ümit; Mentese, Ahmet; Alver, Ahmet; Turan, İbrahim; Sumer, Aysegul
Bu çalışmanın amacı akut derin ven trombozlu (DVT) hastalarda toplam oksidan durum (TOS), toplam antioksidan durum (TAS) ve oksidatif stres indeksi (OSI) düzeylerini ölçerek oksidatif stres ve DVT arasındaki ilişkiyi ortaya koymak ve klinisyenlerin bu hastalarda oksidatif stresi dengelemek üzere koruyucu önlemler almasına yardımcı olmaktır.Metod: Bu çalışmada 52 DVT'li ve 45 DVT olmayan bireylerden alınan serum örneklerinde TOS, TAS ve OSI seviyeleri belirlenerek karşılaştırıldı.Bulgular: TOS ve OSI seviyeleri DVT hastalarında kontrol grubu ile karşılaştırıldığında istatistiksel olarak anlamlı yüksek bulunurken (p<0.0001) TAS seviyelerinde fark görülmedi, p=0.118. Hasta grubu idiopatik ve sekonder DVT olarak iki gruba ayrıldı. TOS ve OSI seviyeleri hem idiyopatik DVT hem de sekonder DVT hastalarında kontrol grubu ile karşılaştırıldığında istatistiksel olarak anlamlı yüksek bulundu (p<0.0001). İdiyopatik DVT hastalarında TAS seviyeleri kontrol grubundan anlamlı yüksek iken sekonder DVT hastalarında fark gözlenmedi. Sonuç: Sonuç olarak ROC eğrisine göre elde edilen spesifite ve sensitivite değerleri TOS ve OSI parametrelerinin DVT'nin tanısında kullanılabilecek birer belirteç olabileceğini göstermektedir. Aynı zamanda oksidatif stres belirteçlerinin belirlenmesi hastalarda oksidatif stresin düzeltilmesi için klinisyenlere gerekli önlemleri alabilmeleri için yol gösterici olabilir
- MakaleAçık Erişim2015Evaluation of oxidative stress balance in acute deep vein thrombosis; [Akut derin ven trombozunda oksidatif stres dengesinin değerlendirilmesi]
Menteşe, Ümit; Turan, İbrahim; Doğan, Süheyla; Sümer, Ayşegül; Coşkun, Ceyhun; Alver, Ahmet; Doğan, Orhan Veli; Menteşe, Seda Öztaş; Menteşe, Ahmet
Objective: The purpose of this study was to show the association between oxidative stress and deep venous thrombosis (DVT) by determining total oxidant status (TOS), total antioxidant status (TAS) and oxidative stress index (OSI) values in patients with DVT and to take precautionary measures to balance oxidative status. Methods: TOS, TAS and OSI levels in serum from 52 individuals with DVT and 45 without DVT were compared. Results: TOS and OSI levels were significantly higher in patients with DVT compared with the control group (p<0.0001), but no difference was observed in TAS levels (p=0.118). The patient group was divided into two subgroups, idiopathic and secondary DVT. TOS and OSI levels were significantly higher patients with both idiopathic DVT and secondary DVT compared to the control group (p<0.0001). TAS levels were significantly higher in patients with idiopathic DVT than in the control group, but no difference was observed in the patients with secondary DVT. Conclusion: Specificity and sensitivity values obtained from the receiver operating characteristic (ROC) curve show that TOS and OSI are both markers that can be used in the diagnosis of DVT. Also, determination of oxidative stress markers may guide clinicians to take necessary precautions to balance oxidative stress in the patients.
- MakaleAçık Erişim2014Oxidant-Antioxidant Balance during On-Pump Coronary Artery Bypass Grafting
Mentese, Umit; Dogan, Orhan Veli; Turan, Ibrahim; Usta, Sefer; Dogan, Emre; Mentese, Seda Oztas; Demir, Selim; Ozer, Tanil; Aykan, Ahmet Cagri; Alver, Ahmet
Backround. The aim of this study was to evaluate the changes in perioperative oxidant-antioxidant balance in ONCABG. Methods. Twenty-three patients were included in this study. Serum total oxidant status (TOS), total antioxidant status (TAS), and oxidative stress index (OSI) values were assessed preoperatively, at 20 minutes after aortic clamping and at 30 minutes, 6 hours, and 48 hours after declamping (reperfusion). The patients were divided into 2 groups according to the median aortic cross clamping (XC) time: group 1 (XC time < 42 minutes) and group 2 (XC time >= 42 minutes). Results. TOS and OSI values of whole patients at 30 minutes after reperfusion were higher than preoperative values (P = 0.045, P = 0.015), while perioperative TAS levels of the patients were similar to the preoperative levels (P = 0.173). XC time was correlated with TOS levels at 30 minutes after reperfusion (P = 0.43, P = 0.041). In group 2, TOS and OSI values at 30 minutes after reperfusion were higher than preoperative values (P = 0.023, P = 0.048), whereas a significant difference was not found in group 1 (P = 0.601, P = 0.327). Conclusions. Oxidative imbalance and increase in TOS at reperfusion in ONCABG may be associated with XC time.
- MakaleYayıncıda açık erişim2013Serum anti-carbonic anhydrase I and II antibodies and polycystic ovary syndrome; [Serum anti-karbonik anhidraz I ve II antikorları ve polikistik over sendromu]
Menteşe, Ahmet; Güven, Süleyman; Sümer, Ayşegül; Turan, Ibrahim; Demir, Selim; Karahan, Süleyman Caner; Alver, Ahmet
Aim: The aim of this study is to investigate anti-carbonic anhydrase antibodies (anti-CA I and CA II antibodies) in the sera of women with polycystic ovary syndrome (PCOS). Methods: In this study serum anti-CA I and II antibody levels of age and BMI matching fifty women with PCOS and fifty women without PCOS on day three of menstrual cycle were assessed with an ELISA method previously developed by Hosoda and modified by Alver et al. Results: The mean serum anti-CA I antibody levels were significantly higher in women with PCOS and anti-CA II antibody levels were not significantly different in women with PCOS compared with control subjects. For serum anti-CA I antibody, the absorbance higher than 0.484 (mean + 3SD of control subjects) was taken as positive, Anti-CA I antibody was detected in 13 of 50 patients with PCOS (26%). Considering serum anti-CA II antibody, the absorbance higher than 0.654 (mean + 3SD of control subjects) was taken as positive. Anti--CA II antibody was detected in 2 of 50 patients with PCOS (4%). All patients with positive anti-CA II antibody also had positive anti-CA I antibody. Autoantibodies specifically reactive to CA I were found to be present at a higher frequency than CA II in the serum of subjects with PCOS in the present study. Conclusion: The results may suggest that autoimmune responses against CA I may be involved in the pathogenesis of PCOS.