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  • Küçük Resim
    Öğe
    Relationship Between Blood and Pericardial Signal Peptide-CUB (complement C1r / C1s, Vegf and Bmp 1) -EGF (epidermal growth factor)-like Protein-1 (SCUBE-1) Levels and Ventricular Functions in Coronary Artery Bypass Patients
    (2021) Kankılıç, Nazım; Karahan, Oğuz; Demirtaş, Sinan; Yavuz, Celal; Çalışkan, Ahmet; Güçlü, Orkut; Kaplan, İbrahim
    Background: Signal peptide-CUB (complement C1r/C1s, Uegf, and Bmp1)-EGF (epidermal growth factor)- like do- main- containing protein 1(SCUBE-1) is a cell surface protein studied as a biomarker in thrombosis and ischemia conditions and secreted at currently studied early embryogenesis. The aim of this study is to investigate the rela- tionship between left ventricular functions and pericardial / serum SCUBE-1 values of patients who underwent cor- onary artery bypass surgery. Materials and Methods: Forty patients who underwent cardiopulmonary bypass graft surgery were included in the study. Detailed echocardiographic findings of the patients were made before the operation. Left ventricular dys- function markers were determined according to left ventricular fracshortening. SCUBE-1 levels were studied with ELISA kits in blood plasma and pericardial fluid samples. SCUBE-1 levels were statistically compared between the determined groups. Results: Statistical differences were observed in LVDs, IVSd, neutrophil, RBC, CK-MB, troponin-I and WBC values in low and high FS groups (p <0.05). SCUBE-1 plasma levels did not differ statistically between the FS groups (p> 0.05). The same situation was similar for pericardial fluid levels (p> 0.05). Correlation was seen between SCUBE-1 plasma levels and SCUBE-1 pericardial levels (p <0.05). There was no significant correlation between echocardiographic findings and SCUBE-1 levels (p> 0.05). Conclusions: These results showed us that SCUBE-1 plasma and the pericardial fluid levels had no effect on the left ventricular dysfunction. SCUBE-1 is not one of the currently identified markers of cardiac dysfunction. Future studies will further increase our knowledge on this subject.
  • Küçük Resim
    Öğe
    Vascular effects of continuous hyperbaric oxygen exposure: experimental outlook
    (2023) Yavuz, Celal; Karahan, Oğuz; Akkaya, Özgür
    Hyperbaric oxygen (HBO) treatment aims to restore tissue oxygenation by inhaling 100% oxygen in pressure rooms. Although beneficial effects have been reported with regard to re-oxygenated ischemic tissues, conflicting findings have been presented concerning the paradoxical tissue response following reperfusion and/or the different responses of non-ischemic normal tissues to increased oxygen exposure. The present study sought to experimentally investigate the impact of continuous HBO treatments on normal aortic tissue. New Zealand rabbits were placed in pressure rooms for 90 minutes per day under 2.5 atmospheric pressure and exposed to HBO for 28 days. Normal structural histology was obtained in the control group. Foam cells were detected in the aortic intimae, thickening and undulation were visualized in the endothelium, and localized separations were observed in the tunica media in the study group compared with the control group. Moreover, salient vasa vasorum was detected in the study group via histopathology. These findings suggest that continuous HBO exposures disrupt the normal vascular structure of a healthy aorta. © 2023 Wolters Kluwer Medknow Publications. All rights reserved.