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Öğe A new imaging modality in detection of caustic oesophageal injury: Technetium-99m pyrophosphate scintigraphy(Elsevier Ireland Ltd, 2009) Aksu, Burhan; Durmus-Altun, Gulay; Ustun, Funda; Torun, Nese; Kanter, Mehmet; Umit, Hasan; Sut, NejdetObjectives: Early oesophagoscopy is usually recommended in children after caustic ingestion to assess the severity of the initial digestive lesions. An oesophagoscopic procedure in children always demands to be performed under sedation and bears a certain risk of iatrogenic injury. The purpose of the study is to determine the value and sensitivity of Tc-99m pyrophosphate (99mTc-PYP) scintigraphy for the detection of caustic oesophageal injury. Methods: The caustic oesophageal burns were created with 25% NaOH in an experimental rat model. Seventeen rats were divided into two groups. The BURN group (n = 9) included caustic oesophageal burning rats. Non-BURN group (n = 8) included sham-operated rats. All animals underwent 99mTc-PYP scintigraphy 72 In after the burning experiment. Anterior static and single-photon emission computed tomography images were obtained using a tow-energy all-purpose collimator, 2.55 zoom factor, 3 h after intravenous injection of 10 mCi 99mTc-PYP. After the imaging, all the oesophagi were explored for external determination of the injury sites and macroautoradiographic scintigraphy as well. Rectangular region of interest were placed in the visually determined lesion of oesophagus (0) as well as non-lesion area (N), and an ON ratio was created. The severity and extension of oesophageal burn were assessed 3 days after burning by histopathologic evaluation. The injuries were graded according to the ulcer depth, ulcer width, thrombus formation, and the development of perivascular fibrinoid necrosis. Results: The oesophageal burning areas were demonstrated by visual evaluation of the Tc-99m PYP scintigraphy on all animals. The mean ON ratio of 99mTc-PYP was 21.61 +/- 7.01 in the BURN group and in the non-BURN group, was 2.25 +/- 0.24 (p < 0.001). The best cut-off point of the ON ratio for caustic oesophageal injury was 5.45, with sensitivity and specificity of 100%. PYP scan findings were also confirmed by histological evidence of ulcer depth, ulcer width, thrombus formation, and perivascular fibrinoid necrosis in the same areas. Conclusions: The caustic oesophageal injuries have been demonstrated by 99mTc-PYP scintigraphy in burning experiment. 99mTc-PYP scintigraphy is sensitive for detection of caustic oesophageal injury. This new imaging tool is found to be sensitive and specific for the detection of caustic oesophageal injury in the rats. Published by Elsevier Ireland Ltd.Öğe The relation of homocysteine levels with deficit syndrome and working memory in schizophrenic patients(Cumhuriyet Univ Tip Fak Psikiyatri Anabilim Dali, 2011) Tuglu, Cengiz; Ozcan, Sevilay; Erdogan, Yasin; Sut, Nejdet; Vardar, Erdal; Abay, ErcanObjective: There are many theories about etiology of schizophrenia and many studies are going on to find out a biologic determinant specific for schizophrenia. Single carbon metabolism theory has been suggested for the etiology of schizophrenia. There are also many data about a defect in homocysteine metabolism and increased levels of homocysteine in schizophrenic subjects but the correlation of hyperhomocysteinemia with the clinical reflections and symptom dispersion of schizophrenia has not been studied yet. Methods: For forty-one schizophrenic patients, clinical assessments were performed. The patients were divided into two groups, as deficit syndrome group and nondeficit syndrome group, using the deficit syndrome chart. Various test batteries have been applied to all patients to asses the clinical symptomatology and working memory. Serum homocysteine, vitamin B-12, and folic acid levels were measured concurrently. Results: Homocysteine levels were higher in the study group and mild to moderate hyperhomocysteinemia has been observed at the sample group independent folic acid levels. The homocysteine levels and clinical scale scores did not correlate statistically but folic acid levels did with negative symptomotology and functional disturbance. Conclusion: Serum homocysteine levels were elevated in both male and female schizophrenia patients. Hyperhomocysteinemia with the deficit syndrome as well as working memory did not show a statistically significant correlation. (Anatolian Journal of Psychiatry 2011; 12:169-176)Öğe Voluntary Physical Activity Increases AKT and supresess ERK Activation in the left Ventricle of Female Rats in the High Fructose Feeding-Induced Metabolic Syndrome(Wiley, 2023) Firat, Nihayet; Aydin, Muhammed Ali; Tastekin, Ebru; Aydogdu, Nurettin; Sut, Nejdet; Vardar, Selma Arzu[Abstract Not Available]
