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Öğe Acoustic Radiation Force Impulse Imaging for Evaluation of Renal Parenchyma Elasticity in Diabetic Nephropathy(Amer Roentgen Ray Soc, 2015) Goya, Cemil; Kilinc, Faruk; Hamidi, Cihad; Yavuz, Alpaslan; Yildirim, Yasar; Cetincakmak, Mehmet Guli; Hattapoglu, SalihOBJECTIVE. The goal of this study is to evaluate the changes in the elasticity of the renal parenchyma in diabetic nephropathy using acoustic radiation force impulse imaging. SUBJECTS AND METHODS. The study included 281 healthy volunteers and 114 patients with diabetic nephropathy. In healthy volunteers, the kidney elasticity was assessed quantitatively by measuring the shear-wave velocity using acoustic radiation force impulse imaging based on age, body mass index, and sex. The changes in the renal elasticity were compared between the different stages of diabetic nephropathy and the healthy control group. RESULTS. In healthy volunteers, there was a statistically significant correlation between the shear-wave velocity values and age and sex. The shear-wave velocity values for the kidneys were 2.87, 3.14, 2.95, 2.68, and 2.55 m/s in patients with stage 1, 2, 3, 4, and 5 diabetic nephropathy, respectively, compared with 2.35 m/s for healthy control subjects. Acoustic radiation force impulse imaging was able to distinguish between the different diabetic nephropathy stages (except for stage 5) in the kidneys. The threshold value for predicting diabetic nephropathy was 2.43 m/s (sensitivity, 84.1%; specificity, 67.3%; positive predictive value, 93.1%; negative predictive value 50.8%; accuracy, 72.1%; positive likelihood ratio, 2.5; and negative likelihood ratio, 0.23). CONCLUSION. Acoustic radiation force impulse imaging could be used for the evaluation of the renal elasticity changes that are due to secondary structural and functional changes in diabetic nephropathy.Öğe THE ASSOCIATION OF RELATIVE HYDRATION STATUS WITH NT-PROBNP, IVC INDEX AND BLOOD PRESSURE IN NEWLY DIAGNOSED STAGE 5 CHRONIC KIDNEY DISEASE(Carbone Editore, 2013) Yilmaz, Zulfukar; Yildirim, Yasar; Aydin, Fatma Yilmaz; Aydin, Emre; Kadiroglu, Ali Kemal; Yilmaz, Mehmet EminIntroduction: Accurate and sensitive methods are very important for the assessment of volume status in chronic kidney disease (CKD). Bioelectrical impedance analysis (BIA) is a simple, non-invasive and promising method to assess volume status in patients with CKD. Objective: The aim of this study was to evaluate the association between BIA derived relative hydration status (RHS) and clinical findings and other markers of volume status in patients who were newly diagnosed with stage 5 CKD. Patients and method: Totally 85 patients who were newly diagnosed with stage 5 CKD and have not received any renal replacement therapy were enrolled in this study. Hydration status was assessed by multi-frequency BIA device (Body Composition Monitor, Fresenius). Relative hydration status was defined as the overhydration (OH) to extracellular water (ECW) ratio and clinical overhydration was considered as an overhydration-to-extracellular water ratio of >% 15. The patient population was divided into 2 groups; group 1: RHS >% 15, group 2: RHS <= %15. Inferior vena cava (IVC) diameter was measured by echocardiography and indexed for body surface area as IVC index (mm/m2). NT-proBNP was measured by immunoassay. Results: Among subjects, 57.6% of the patients had RHS >% 15. Systolic blood pressure (SBP), diastolic blood pressure (DBP), proteinuria, OH. ECW, IVC index, and NT-proBNP were significantly higher, while serum albumin and residual urine were significantly lower in group I than group 2 (p<0.05). There was a significant positive correlation between RHS and SBP, DBP, proteinuria. OH, ECW, NT-proBNP and IVC index and a negative correlation with albumin and residual urine (p<0.05). Conclusions: RHS may be an important measuring parameter of volume overload in patients with CKD. RHS is correlated with NT-proBNP, blood pressure and IVC index.Öğe Can Paricalcitol Increase the Effectiveness of N-Acetylcysteine in Contrast Induced Acute Kidney Prophylaxis in Rats? A Biochemical and Histopathological Study(Soc Chilena Anatomia, 2022) Yildirim, Yasar; Bahadir, Veysi; Aydin, Emre; Aydin, Fatma Yilmaz; Yilmaz, Zulfukar; Ketani, Aydin; Kaplan, Ibrahim& nbsp;N-Acetylcysteine (NAC) is used for contrast induced acut kidney injury (CI-AKI) prophylaxis because of its antioxidant effects. Paricalcitol, which has reno-protective effects, is likely to provide a more effective prophylaxis when added to NAC treatment. The study was designed based on this hypothesis. The study was organised to include 4 groups each consisting of 7 rats. Group 1 was the control group, and Group 2 included rats with CI-AKI. Rats in Group 3 were administered NAC at a dose of 100 mg/kg via oral gavage once a day for 5 days. Rats in group 4 were administered paricalcitol at a dose of 0.4 mcg/kg once a day for 5 days in addition to NAC. CI-AKI was induced after the treatments in both groups. The study was terminated on the sixth day. Samples were collected from the rats & rsquo; sera and kidney tissues to study oxidant and antioxidant parameters; kidney function tests were also studied. There were significant differences between the contrast nephropathy group (Group 2) and NAC and NAC+paricalcitol groups with respect to serum urea and creatinine levels. When the same groups were compared regarding oxidant (TOS-MDA) and antioxidant (TAC-Paraoxonase) parameters, we observed that the oxidant parameters increased in serum and kidney tissue samples with NAC use, and that effect was strengthened by the addition of paricalcitol to NAC treatment. However, despite increased antioxidant effectiveness, we observed no decrease in urea and creatinine levels when paricalcitol was added for CI-AKI in rats. There was no significant difference between Group 3 and Group 4. Paricalcitol provides a more potent antioxidant effect in both serum and kidney tissue samples when added to NAC treatment in rats with CI-AKI. Despite increased antioxidant parameters, however, paricalcitol does not provide a significant decrease in urea and creatinine levels.Öğe Cefuroxime Axetil Related DRESS (drug reaction with eosinophilia and systemic symptoms) Syndrome(Modestum Ltd, 2016) Yildirim, Yasar; Kara, A. Veysel; Yilmaz, Zulfikar; Yildirim, Resit; Yilmaz, Sureyya; Kadiroglu, A. Kemal; Yilmaz, M. EminDRESS (Drug reaction with eosinophilia and systemic symptoms) syndrome is a rare, potentially life-threatening, drug induced hypersensitivity reaction manifested by fever, rash, eosinophilia, lymphadenopathy, and organ involvement especially liver and kidney. The disease is characterized by a long latency period (at least two weeks) between the drug exposure and disease onset. The most commonly reported drugs associated with DRESS syndrome in the literature are allopurinol, and anticonvulsants. We describe a patient presented with eosinophilia, fever, diffuse maculopapular rash, hepatomegaly, and multiple intra-abdominal lymphadenopathies just ten days after initiation of cefuroxime axetil. In our case, we aim to announce the first case report of cefuroxime axetil related DRESS syndrome, and also speculate on the possible association between cephalosporin and DRESS syndrome.Öğe Could the appropriate anti-diabetic therapy be mixed insulin in dialysis patients?(Springer India, 2021) Demircan, Vehbi; Yildirim, Yasar; Aydin, Emre; Kara, Ali Veysel; Aydin, Fatma Yilmaz; Yilmaz, Zulfukar; Kadiroglu, Ali KemalBackground A good glycemic regulation should be provided to reduce mortality and morbidity in patients with end-stage renal failure due to diabetes mellitus. However, the use of insulin therapies in patients with renal failure is troublesome due to the increased rate of side effects. In our study, we investigated the frequency of hypoglycemia and its symptoms in patient groups receiving intensive and mixed insulin therapies. Materials and methods This prospective study included 89 hemodialysis patients with DM-related stage 5 chronic kidney disease who were followed up in a nephrology clinic of a university hospital between January 2013 and August 2015. Our study group was divided into two groups as those receiving intensive insulin therapy and mixed insulin therapy. Group 1 and group 2 consisted of 46 patients and 43 patients, respectively. Hypoglycemia (glucose < 70 mg/dl) was investigated in patients with HbA1c levels that decreased below 7% after treatment, and the symptoms were evaluated according to the hypoglycemic scale. The results between the groups were evaluated using chi-square and Student's t test Results A total of 89 patients were included in the study. HbA1c was 6.83% in the group receiving intensive insulin therapy and 6.95% in the group receiving mixed insulin therapy (p > 0.05). Hypoglycemia was detected in 27 patients (58.7%) in the intensive insulin therapy group and 14 patients (32.6%) in the mixed insulin therapy group. There was a significant level of hypoglycemia in the group receiving intensive insulin therapy (p < 0.05). In our study, the group receiving intensive insulin therapy had higher frequency and severity of common hypoglycemia symptoms such as confusion, sweating, weakness, dysphasia, palpitations, blurred vision, and feeling hungry. Conclusion There was a higher frequency of hypoglycemia under intensive insulin therapy in patients undergoing dialysis due to chronic kidney failure, which suggests that mixed insulin therapy is the ideal treatment to avoid hypoglycemia in this group of patients.Öğe EFFECT OF RED CELL DISTRIBUTION WIDTH ON ACUTE KIDNEY INJURY IN PATIENTS WITH METASTATIC LUNG CANCER RDW IN LUNG CANCER PATIENTS WITH KIDNEY INJURY(Carbone Editore, 2019) Aydin, Fatma Yilmaz; Aydin, Emre; Yildirim, Yasar; Yilmaz, Zulfukar; Kara, Ali Veysel; Yilmaz, Sureyya; Kaplan, Muhammet AliIntroduction: Lung cancer is a common malignity with high mortality rate. One of the main reason which affects mortality is acute kidney injury (AKI). Therefore, early diagnosis of AKI is of essential. In our study, we investigated the effects of Red Cell Distribution Width (RDW) on acute kidney injury development in metastatic acute lung cancer patients. Material and methods : The present study was conducted 143 patients with lung malignity at Stage 4 followed up Faculty of Medicine, Dicle University, between 2010- 2015. The study was carried out retrospectively. Creatinine levels, RDW, hemoglobin, Mean Corpuscular Volume ( MCV), C Reaktive protein (CRP), albumin levels as of admission to the intensive care unit (ICU) and after 48 hours, length of stay in ICU and results were recorded. The patients were divided in two groups as RDW > 16,8 and <= 16,8. The groups were examined in terms of acute kidney injury development, mortality and length of stay in intensive care. Results: The study population consists of 122 male (85.3%) and 21 female (14.7%) patients. The average RDW values of the patients is 16.53 +/- 1.91 and RDW >16,8 in 43.4%. AKI development was identified in 60.1% of the patients. The mean age, serum creatinine, AKI and CRP, mortality values were significantly higher and serum albumin, length of stay in intensive care (day) were significantly lower in RDW> 16.8 patient group compared to RDW <= 16.8 patient group. Conclusion: The present study showed that RDW is closely associated with acute kidney injury in advanced lung cancer patients.Öğe Epidemiological and clinical aspects of liver cirrhosis in adult patients living in southeastern anatolia: Leading role of HBV in 505 cases(H G E Update Medical Publishing S A, 2007) Bayan, Kadim; Yilmaz, Serif; Tuzun, Yekta; Yildirim, YasarBackground/Aims: Liver cirrhosis is the terminal condition of liver disorders resulting from various causes. Literature lacks data on epidemiological and clinical aspects of liver cirrhosis in Turkey. We aimed to evaluate the main features of liver cirrhosis in this study. Methodology: We included in the study a total of 505 patients referred to Dicle University Hospital in the last five years and evaluated retrospectively. Demographic features, etiology, clinical findings, disease severity, complications and mortality rates were all recorded. Results: Of the patients, 136 (27%) were female and 369 were (73%) male. Mean age was 50.4. The etiologic spectrum consisted of 368 HBV (72.9%), 41 HCV (8.1%), 12 alcohol (2.4%). Rate for cryptogenic cirrhosis (CC) was 11.1% with mean age of 45.4. HDV superinfection was present in 17.8%. Most of the patients were in Child-Pugh class B. Number of decompensated cirrhosis cases was 278 (55%). Hepatocellular cancer (HCC) was seen in 8.9% of patients and 88% had HBV with a mean age of 60. HCC was seen more commonly in HDV superinfected patients (p=0.035). In-patient mortality was observed in 13.2%. Conclusions: HBV is the leading etiological factor of liver cirrhosis in Southeastern Anatolia and strict measures must be taken against perinatal or horizontal transmission of contagious pathogens. Alcohol had a marginal role in cirrhosis in our region. Although HDV superinfection is decreasing with time, it may increase HCC risk. Patients with cryptogenic cirrhosis were younger and had lower Child-Pugh scores.Öğe Evaluation of Anthropometric and Metabolic Parameters in Obstructive Sleep Apnea(Hindawi Ltd, 2015) Yildirim, Yasar; Yilmaz, Sureyya; Guven, Mehmet; Kilinc, Faruk; Kara, Ali Veysel; Yilmaz, Zulfukar; Kirbas, GokhanAims. Sleep disorders have recently become a significant public health problem worldwide and have deleterious health consequences. Obstructive sleep apnea (OSA) is the most common type of sleep-related breathing disorders. We aimed to evaluate anthropometric measurements, glucose metabolism, and cortisol levels in patients with obstructive sleep apnea (OSA). Materials and Methods. A total of 50 patients with a body mass index >= 30 and major OSA symptoms were included in this study. Anthropometric measurements of the patients were recorded and blood samples were drawn for laboratory analysis. A 24-hour urine sample was also collected from each subject for measurement of 24-hour cortisol excretion. Patients were divided equally into 2 groups according to polysomnography results: control group with an apnea-hypopnea index (AHI) <5 (n = 25) and OSA group with an AHI = 5 (n = 25). Results. Neck and waist circumference, fasting plasma glucose, HbA1c, late-night serum cortisol, morning serum cortisol after 1 mg dexamethasone suppression test, and 24-hour urinary cortisol levels were significantly higher in OSA patients compared to control subjects. Newly diagnosed DM was more frequent in patients with OSA than control subjects (32% versus 8%, p = 0.034). There was a significant positive correlation between AHI and neck circumference, glucose, and latenight serum cortisol. Conclusions. Our study indicates that increased waist and neck circumferences constitute a risk for OSA regardless of obesity status. In addition, OSA has adverse effects on endocrine function and glucose metabolism.Öğe Evaluation of fluid status related parameters in hemodialysis and peritoneal dialysis patients: Clinical usefulness of bioimpedance analysis(Elsevier Urban & Partner Sp. Z O O, 2014) Yilmaz, Zulfukar; Yildirim, Yasar; Aydin, Fatma Yilmaz; Aydin, Emre; Kadiroglu, Ali Kemal; Yilmaz, Mehmet Emin; Acet, HalitBackground and objective: Fluid overload is a common and serious problem that leads to severe complications in dialysis patients. We aimed to compare hydration status as measured with bioimpedance analysis (BIA) method in hemodialysis (HD) and peritoneal dialysis (PD) patients, as well as investigating the association between blood pressure, left ventricular mass index (LVMI) and hydration status. Materials and methods: We examined 43 HD and 33 PD patients. Blood pressure was recorded. In each group, echocardiographic examinations were performed on all patients. Hydration status was assessed using multifrequency bioelectrical impedance analysis. Overhydration was defined as an overhydration (OH)/extracellular water (ECW) ratio of >0.15. Results: The OH/ECW ratio was significantly higher in PD patients compared to post-HD patients. Overhydration was statistically more frequent in PD than in post-HD patients (30.3% vs. 11.6%, P = 0.043). Systolic blood pressure (SBP) in both post-HD and PD groups, and LVMI in the PD group were found to be significantly higher in overhydrated patients than non-overhydrated patients. In multiple linear regression analyses, increased OH/ECW ratio was independently associated with higher SBP and LVMI. Conclusions: Fluid overload may be an even more prevalent and serious problem in PD patients. Overhydration is closely associated with increased blood pressure and LVMI. OH/ECW ratio, a derived parameter of fluid load measured by BIA, was a significant and independent determinant of SBP and LVMI. (C) 2014 Lithuanian University of Health Sciences. Production and hosting by Elsevier Urban & Partner Sp. z o.o. All rights reserved.Öğe Evaluation of obstetrical patients with disseminated intravascular coagulopathy - tertiary center experience(Taylor & Francis Ltd, 2016) Basaranoglu, Serdar; Evsen, Mehmet Siddik; Agacayak, Elif; Tunc, Senem Yaman; Yilmaz, Zulfikar; Yildirim, Yasar; Deregozu, AvSequiObjective: The purpose of the present study is twofold: (a) to investigate the etiology of disseminated intravascular coagulopathy (DIC) caused by obstetrical conditions and (b) to present parameters that can be used in predicting DIC-related mortality in obstetrical patients. Material and method: Obstetrical patients who had a delivery at or were referred (after delivery) to Obstetrics and Gynecology Clinic of Dicle University between July 2006 and December 2013 were retrospectively analyzed in this study. Those patients diagnosed with DIC were included in the study. Results: Fifty-six obstetrical patients carrying the diagnosis of DIC were included in this study. The overall mortality rate was 25% among these patients. More specifically, the mortality rate was 10.7% among patients with a DIC score <= 5 and 40.7% among those with a DIC score >5. Multiple logistic regression analysis resulted in the finding that international normalized ratio (INR) and urea were among those factors affecting mortality in obstetrical DIC [OR: 8.44 (CI: 1.9-36.8), OR: 1.05 (CI: 1.0-1.1), respectively]. Conclusion: DIC is a syndrome that might be caused by obstetrical conditions. It is associated with high mortality and morbidity rates. In obstetrical DIC, urea is the most important factor affecting mortality. In addition, we are of the opinion that DIC score might guide mortality predictions as a determinant of prognosis.Öğe Evaluation of the Frequency of QTc Dispersion and Its Relationship with Clinical and Laboratory Parameters in Dialysis Patients(Turk Nefroloji Diyaliz Transplantasyon Dergisi, 2013) Yilmaz, Zulfukar; Yildirim, Yasar; Yilmaz Aydin, Fatma; Aydin, Emre; Kadiroglu, Ali Kemal; Yilmaz, Mehmet Emin; Kayabasi, HasanOBJECTIVE: QTc dispersion is defined as the difference between the maximal and minimal correct QT interval on standard 12-lead ECG. Increased QTc dispersion has been reported in ESRD patients. In our study, we aimed to evaluate the frequency of QTc dispersion and its relationship between clinical and laboratory parameters in patients on regular dialysis programme. MATERIAL and METHODS: Sixty patients underwent dialysis ( 30 HD, 30 CAPD) and another 30 healthy subjects were enrolled into the study. The standard 12 lead ECGs were performed and QTcd was measured from all dialysis patients and control subjects. Blood samples were collected for the measurement of laboratory parameters. RESULTS: Dialysis patients showed significantly higher QTcd than control subjects (55.75 +/- 36.48 versus 28.73 +/- 28.27; p=0.001). Patients with QTcd > 50 ms had significantly higher SBP, urea and ferritin levels, but significantly lower iron binding capacity and calcium levels compared those with QTcd <= 50 ms(p<0.05). Positive correlations were found between QTcd and urea, ferritin and SBP levels, and inverse correlations with iron binding capacity level (p<0.05). CONCLUSION: The frequency of QTc dispersion was 40% among the dialysis patients. Although serum calcium was significantly lower in patients who had QTcd > 50 ms than QTcd <= 50 ms (p<0.05), there was no significant correlation between QTcd and calcium.Öğe Evaluation of volume overload by bioelectrical impedance analysis, NT-proBNP and inferior vena cava diameter in patients with stage 3&4 and 5 chronic kidney disease(Taylor & Francis Ltd, 2014) Yilmaz, Zulfukar; Yildirim, Yasar; Oto, Ferhat; Aydin, Fatma Yilmaz; Aydin, Emre; Kadiroglu, Ali Kemal; Yilmaz, Mehmet EminBackground: Determination of fluid overload is important in chronic kidney disease. Early diagnosis and treatment of volume overload may decrease morbidity and mortality. We aimed to determine body composition by using bioelectrical impedance analysis, and studying other clinical characteristics, inferior vena cava diameter, and N-terminal pro-B natriuretic peptide associated with hydration status in chronic kidney disease Stages 3&4 and 5 in patients not undergoing dialysis. Method: We examined 62 patients with Stages 3&4 and 68 patients with Stage 5 chronic kidney disease. Plasma NT-proBNP was measured and analyzed after log transformation. Inferior vena cave diameter was measured with echocardiography and indexed for body surface area. Hydration status was assessed using multi-frequency bioelectrical impedance analysis. Overhydration was defined as overhydration/extracellular water >0.15. Results: Overhydration was more frequent in Stage 5 than in Stages 3&4 patients. Systolic and diastolic blood pressure, inferior vena cava index, and log NT-proBNP were higher in overhydrated compared to non-overhydrated patients. A significant positive correlation existed between overhydration/extracellular water and log NT-proBNP, systolic and diastolic blood pressures, and inferior vena cava index. In multiple linear regression analysis, the variables associated with hydration status were male sex, extracellular water/total body water, and extracellular water/intracellular water (greater overhydration), while serum albumin levels had a negative association with overhydration. Conclusion: Overhydration is more prevalent in Stage 5 chronic kidney disease patients than in Stages 3&4 patients. Bioelectrical impedance analysis, inferior vena cava diameter, and NT-proBNP analysis in chronic kidney disease are useful methods to determine the volume overload.Öğe The Frequency Of Metabolic Syndrome in Patients on Continuous Ambulatory Peritoneal Dialysis and the Association of Developing Metabolic Syndrome With Dialysis Duration(Turk Nefroloji Diyaliz Transplantasyon Dergisi, 2011) Kayabasi, Hasan; Yilmaz, Zulfukar; Yildirim, Idris; Yildirim, Yasar; Kadiroglu, Ali Kemal; Yilmaz, M. EminOBJECTIVE: To evaluate the characteristics of patients with metabolic syndrome, and the association of developing MS with peritoneal dialysis duration among patients undergoing continuous ambulatory peritoneal dialysis. MATERIAL and METHODS: Fifty-eight nondiabetic CAPD patients were evaluated. Biochemical parameters, blood pressure, length, weight, waist circumference, and body mass indexes were recorded. MS was determined using NCP-ATP III criteria. The patients were divided into 3 groups according to dialysis duration (Group 1: <= 60 months, Group 2: 61-120 months, Group 3: >= 121 months) and the frequency of MS was compared. RESULTS: Twenty-four of 58 patients were male, and MS was present in 22 (37.9%) patients. 14 (82.4%) of 22 patients with MS were female, (p=0.544). There was a statistically significant difference between patients with and without MS regarding age, BMI, waist circumference, PD duration, and triglyceride levels (p<0.05). 55% (n=32) of the patients were in group 1, 34.5% (n=20) in group 2, and 10.5% (n=6) in group 3 (p=0.092). The frequency of MS decreased with prolongation of dialysis duration (50% in group 1, 20% in group 2, and 33,3% in group 3) (p<0.001). CONCLUSION: The frequency of MS among our CAPD patients was 37.9% and it decreased with prolongation of dialysis duration. This result may suggest that alterations in metabolic state, and abandoning glucose-based PD solutions may improve MS criteria.Öğe Hypersensitivity and tumor lysis syndrome associated with cetuximab treatment: should we be afraid?(Sage Publications Ltd, 2015) Cihan, Sener; Atasoy, Ajlan; Yildirim, Yasar; Babacan, Nalan Akgul; Kos, Tugba FahriyeThe majority of the chemotherapy agents in use today cause various infusion reactions, from mild flushing to life-threatening events. The frequency of the reported hypersensitivity reactions induced by cetuximab varies between 3% and 22%. It is recommended in the literature to stop the infusion and replace cetuximab with panitumumab in case of hypersensitivity reactions observed during the treatment of colon cancer. Tumor lysis syndrome (TLS) may occur in colorectal cancers with heavy tumor load. Tumor lysis syndrome may be life-threatening. In our patient with widespread bone and liver metastases, treatment continued with cetuximab as a combination therapy with irinotecan in spite of the hypersensitivity and TLS led to a complete treatment response. The complete response observed after 3 months through continued therapy in our patient may present an example supporting treatment with cetuximab in spite of severe reactions.Öğe Influence of coumarin and some coumarin derivatives on serum lipid profiles in carbontetrachloride-exposed rats(Sage Publications Ltd, 2017) Tasdemir, Ezel; Atmaca, Mukadder; Yildirim, Yasar; Bilgin, Hakki Murat; Demirtas, Berjan; Obay, Basra Deniz; Kelle, MustafaIn the present study, coumarin and some coumarin derivatives (esculetin, scoparone, and 4-methylumbelliferone) were investigated for their lipid-lowering effect in rats. Male Sprague-Dawley rats (150-200 g) were divided into six groups and each group comprised of five rats. Hepatic injury-dependent hyperlipidemia was induced by carbon tetrachloride (CCl4, 1.25 ml/kg). Coumarin and coumarin derivatives esculetin (35 mg/kg), scoparone (35 mg/kg), 4-methylumbelliferone (35 mg/kg), or coumarin (30 mg/kg) were administered to experimental groups at 12-h intervals. Animals received the derivatives esculetin, scoparone or 4-methylumbelliferone prior to the administration of a single toxic dose of CCl4. Serum total cholesterol (TC), triglyceride (TG), very low-density lipoprotein cholesterol (VLDL-C), and low-density lipoprotein cholesterol (LDL-C) levels significantly increased in CCl4-treated group (p < 0.05, p < 0.01, p < 0.01, and p < 0.05, respectively), while levels of serum high-density lipoprotein cholesterol (HDL-C) decreased (p < 0.01). 4-Methylumbelliferone had no recovery effects on serum TC levels, however, significantly prevented CCl4-induced hyperlipidemia by reducing TG and VLDL-C levels (p < 0.05 and p < 0.05, respectively). In addition, coumarin had no recovery effect on any of the serum lipid parameters against CCl4-induced hyperlipidemia. Among the coumarin derivatives only esculetin and scoparone significantly prevented serum HDL-C in CCl4-induced dyslipidemia. The results from this study indicate that the chemical structure of coumarins plays an important role on the regulation of serum lipid profiles.Öğe LATE-BREAKING ABSTRACT: The effect of volume overload on pulmonary hypertension in hemodialysis patients(European Respiratory Soc Journals Ltd, 2015) Yilmaz, Sureyya; Yildirim, Yasar; Taylan, Mahsuk; Demir, Melike; Yilmaz, Zulfukar; Kara, Aliveysel; Aydin, Fatma[Abstract Not Available]Öğe Left ventricular global longitudinal strain can detect subclinical left ventricular systolic dysfunction in adult patients with primary nephrotic syndrome(Springer, 2023) Cap, Nese Kanbal; Aydin, Emre; Kadiroglu, Ali Kemal; Ozbek, Mehmet; Yildirim, Yasar; Yilmaz, Zulfikar; Aydin, Fatma YilmazIt has been shown that there is an increased risk of cardiovascular events such as heart failure and death in nephrotic syndrome. Left ventricle global longitudinal strain (LVGLS) is a more sensitive measure of assessing myocardial dysfunction and is more reproducible than left ventricle ejection fraction (LVEF%). LVGLS can detectsubclinical deterioration in the left ventricle early. In this study, we aimed to investigate LVGLS in Primary Nephrotic Syndrome (PNS) patients with normal LVEF%. Patients with histopathologically confirmed PNS were evaluated for this prospective single-center study. Patients with similar age and gender characteristics without nephrotic syndrome were included as the control group. LVGLS measurements were performed by 2D speckle tracking echocardiography. A total of 171 patients, 57 with PNS and 114 in the control group, were included in the study. The mean age was 38 +/- 12 years in the study population, and 95(56%) of the patients were women. LVEF% was 60.2 +/- 4.2 in the PNS group and 61.1 +/- 3.2 in the control group, and there was no significant difference between the two groups (p=0.111). LVGLS was found to be significantly lower in the PNS group (-19.3 +/- 2.3% vs.-20.8 +/- 1.5 %, p<0.001). A significant relationship was observed between PNS and LVGLS in the multivariable linear regression analysis (beta= 4.428, CI 95% =0.57?1.48, p<0.001). A significant relationship was observed between PNS and LVGLS, and LVGLS was found to be lower in PNS patients. In patients with PNS, subclinical left ventricular systolic dysfunction may be detected in the early period by measuring LVGLS.Öğe THE POTENTIAL BENEFICIAL EFFECTS OF ETHYL PYRUVATE ON DIABETIC NEPHROPATHY: AN EXPERIMENTAL AND ULTRASTRUCTURAL STUDY(Vesalius Univ Medical Publ, 2016) Bahadir, Mehmet Veysi; Yildirim, Yasar; Baran, Ozlem Pamukcu; Polat, Sait; Akkoc, Hasan; Tunik, SelcukOxidative stress is one of the main causes of diabetic nephropathy, which is a complication of diabetes mellitus (DM). The aim of this study was to investigate the possible role of ethyl pyruvate (EP) in streptozotocin-induced diabetic rats' kidney. Four groups (n = 8) of male Wistar albino rats were used as follows: control group rats received only sodium citrate buffer solution intraperitoneally (ip). The EP group was given 50 mg/kg EP ip. In the DM group, diabetes was induced by streptozotocin. The DM + EP group received 50 mg/kg EP ip. All animals received daily treatment for 14 days, and at the end of the study the kidneys were removed: the left kidney of the rats was used for malondialdehyde (MDA) analysis and the right kidney for histological examination. There was normal appearance of the kidney tissues in the control and the EP-administered groups. In the DM group, there was evident basement membrane thickening and enlargement of mesangial matrix; swelling in some tubular epithelial cells was also noticeable. In the DM+EP administered group, nearly the same appearance as the control group and relative thickening in the glomerular basal membrane were observed. The antioxidant effect of ethyl pyruvate improved the renal structures in the DM + EP group.Öğe PRETREATMENT WITH PARICALCITOL ATTENUATES OXIDATIVE STRESS IN RENAL ISCHEMIA REPERFUSION INDUCED NEPHROPATY IN RATS(Oxford Univ Press, 2016) Yildirim, Yasar; Yilmaz, Zulfukar; Kadiroglu, Ali K.; Kara, Ali V.; Bahadir, Veysi; Aydin, Emre; Aydin, Fatma Y.[Abstract Not Available]Öğe Pretreatment with Paricalcitol Attenuates Oxidative Stress in Renal lschemia Reperfusion-Induced Nephropathy in Rats(Sci Printers & Publ Inc, 2020) Aydin, Fatma Yilmaz; Yilmaz, Zulfukar; Yildirim, Yasar; Aydin, Emre; Ketani, Aydin; Bahadir, Veysi; Kaplan, IbrahimOBJECTIVE: To investigate whether paricalcitol could ameliorate kidney injury due to ischemia reperfusion (I/R) in an experimental study. STUDY DESIGN: Rats were divided into 4 groups: control, paricalcitol, I/R, and paricalcitol +I/R, each containing 7 animals. Intraperitoneal 0.3 mu g/kg paricalcitol was administered to rats once a day for 5 consecutive days in the paricalcitol and paricalcitol+1/R groups. After right nephrectomy, rats were exposed to ischemia/ reperfusion on day 6 in the paricalcitol+1/R and I/R groups. Oxidant and antioxidant parameters, kidney function tests, and histology were investigated. RESULTS: Serum urea and creatinine levels exhibited a significant decrease in rats treated with paricalcitol before I/R as compared to rats exposed just to I/R. In a comparison of the paricalcitol +1/R group with the I/R group, serum total oxidant status (TOS) levels decreased significantly; serum total antioxidant capacity (TAC) and nitric oxide levels, however, increased significantly with paricalcitol administration. Malondialdehyde and TOS levels of kidney tissue were significantly lower, whereas TAC and paraoxonase levels were higher in the paricalcitol +I/R group than in the I/R group. Renal tissue injury scores were found to be significantly higher in the I/R group than in the paricalcitol+ I/R group. CONCLUSION: Pretreatment with paricalcitol was detected to be renoprotective by decreasing renal injury related with renal I/R, which was assessed by improved renal function and histopathologii.
