93 results on '"Eren Z"'
Search Results
2. Acute kidney injury after hip fracture surgery among aging population: Evaluation of incidence and covariates
- Author
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Eren, Z., Uluçay, Ç., Çiğdem Kaspar, E., Altıntaş, F., and Kantarcı, G.
- Published
- 2012
- Full Text
- View/download PDF
3. Effect of dose dependent organophosphate compound on interleukin-6 and insulin receptor substrate-1 levels in rat liver
- Author
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PAŞAOĞLU, HATİCE, Severcan, C., Ekremoglu, M., Gomleksiz, O. Kurnaz, Eren, Z., and Pasaoglu, O. T.
- Published
- 2021
4. JC virus-associated nephropathy in a renal transplant recipient and comparative analysis of previous cases
- Author
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Kantarci, G., Eren, Z., Demirağ, A., Dogan, I., Çakalagaoglu, F., and Yilmaz, G.
- Published
- 2011
- Full Text
- View/download PDF
5. The uncivilizing process of the West and Burgess's suggestion for stopping this process in a clockworkorange
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Eren Z. and OMÜ
- Subjects
Uncivilizing process ,Civilization ,A Clockwork Orange ,Burgess ,Teenage violence - Abstract
Western societies assume themselves more civilized than the other countries. However, the Second World War and the atom bomb lead some scholars to question this assumption. This paper argues that Burgess witnessing the increase in the teenage violence is uneasy about the future of Western civilization. In A Clockwork Orange set in England in the near future, Burgess presents that the increase in teenage violence may result in state violence; some precautions taken by the state may violate human rights which have been accepted as a new standard of civilization after the Second World War, and some people thinking that the state does not punish the teenagers perpetrating violence adequately may attempt to lynch them. This paper aims at discussing that the teenage violence and the state violence depicted in the novel may be the indications of an uncivilizing process for Burgess. Burgess displays as well that although the teenagers using violence are, in fact, in need of affection and care, and they need the guidance of their parents, the parents do not care for their teenage children since they are busy with earning money. The paper concludes that in this novel Burgess warns his readers that they should not expect the state to put an end to this uncivilizing process as the state may become totalitarian and suggests that parents may bring this process to an end by caring about their children. © 2018 Folklor/Edebiyat. All rights reserved.
- Published
- 2018
6. Pleiotropic and Renoprotective Effects of Erythropoietin Beta on Experimental Diabetic Nephropathy Model
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Eren, Z., Günal, M.Y., Arl, E., Çoban, J., Cakalagaoglu, F., Caglayan, B., Kantarcl, G., Eren, Z., Günal, M.Y., Arl, E., Çoban, J., Cakalagaoglu, F., Caglayan, B., Kantarcl, G., and Yeditepe Üniversitesi
- Subjects
Rat model ,Diabetic nephropathy ,Erythropoietin beta - Abstract
Background: This study aimed at investigating the possible protective effect of erythropoietin beta on experimental diabetic nephropathy (DN) model in rats. Methods: Sprague Dawley rats (n = 32) were allocated into 4 equal groups of 8 each, the control (Group C), diabetes (Group D), erythropoietin beta (Group E), and erythropoietin beta treated DN (Group E + D) groups. Streptozocin (65 mg/kg) was used to induce diabetes in 10-week old rats. Erythropoietin beta was given intraperitoneally at a dose of 500 IU/kg/3 days of a week for 12 weeks. Renal function parameters, intrarenal levels and activities of oxidative stress biomarkers, serum inflammatory parameters and kidney histology were determined. Results: Group E + D had lower mean albumin-to-creatinine ratio (p < 0.001) as well as higher creatinine clearance (p = 0.035) than the diabetic rats (Group D). Intrarenal malondialdehyde levels were significantly lower (p = 0.004); glutathione (GSH) levels (p = 0.003), GSH peroxidase (p = 0.004) and superoxide dismutase (p < 0.005) activities of renal tissue were significantly higher in Group E + D than in Group D. The mean serum levels of interleukin-4 (p < 0.005), interleukin 1 beta (p = 0.012), interferon gamma (p = 0.018) and tumor necrosis factor alpha (p < 0.005) were significantly lower; serum levels of monocyte chemoattractant protein 1 (p = 0.018) was significantly higher in Group E + D when compared to Group D. The mean scores of tubulointerstitial inflammation (p = 0.004), tubular injury (p = 0.013) and interstitial fibrosis (p = 0.003) were also lower in Group E + D when compared to Group D. Conclusion: Our data seem to suggest a potential role of erythropoietin beta for reducing the progression of DN in an experimental rat model. This protective effect is, in part, attributable to the suppression of the inflammatory response and oxidative damage. © 2016 S. Karger AG, Basel.
- Published
- 2016
7. Paraoxonase 1 polymorphisms in patients with primary glomerulonephritis, a single-center study in Turkey
- Author
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Eren, Z, Kantarci, G, Biyikli, N, Arikan, H, Tuglular, S, Ergen, A, Akoglu, E, Eren, Z., Kantarci, G., Biyikli, N., Arikan, H., Tuglular, S., Ergen, A., Akoglu, E., Yeditepe Üniversitesi, Eren, Z, Kantarci, G, Biyikli, N, Arikan, H, Tuglular, S, Ergen, A, and Akoglu, E
- Subjects
Genetic polymorphism ,Glomerulonephritis ,Hyperlipidemias ,Human PON1 protein - Abstract
Introduction. Human paraoxonase 1 (PON1) is an enzyme related with high-density lipoprotein cholesterol. The link between genetic polymorphisms of PON1 and hyperlipidemia and increased lipid oxidation may explain these complications in the course of glomerular diseases. In this study, we aimed to investigate PON1 192 and PON1 55 polymorphisms in patients with primary glomerulonephritis and healthy individuals. Materials and Methods. Eighty-six patients with biopsy-proven primary glomerulonephritis and 50 healthy controls were included in the study. Clinical characteristics, lipid profile, paraoxonase activity, and PON1 genotypes (PON1 192 and PON1 55) of all of the participants were studied. Results. Histopathological diagnoses of the patients were membranoproliferative glomerulonephritis (53.5%), focal segmental glomerulosclerosis (33.7%), and membranous nephropathy (12.8%). The patients had lower PON1 activity levels than the healthy controls. No differences were observed in PON1 192 genotypes between the two groups. However, the controls were more likely to carry PON1 55 LM genotype (odds ratio, 4.10; 95% confidence interval, 1.96 to 8.61; P
- Published
- 2012
8. Effects of paricalcitol and aliskiren combination therapy on experimental diabetic nephropathy model in rats
- Author
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Eren, Z., Günal, M.Y., Bakir, E.A., Coban, J., Ça?layan, B., Ekimci, N., Kantarci, G., Eren, Z., Günal, M.Y., Bakir, E.A., Coban, J., Ça?layan, B., Ekimci, N., Kantarci, G., and Yeditepe Üniversitesi
- Subjects
Diabetic nephropathy ,Paricalcitol ,Aliskiren - Abstract
Background/Aims: The aim of the present study was to investigate the effect of combination of aliskiren with paricalcitol on experimental diabetic nephropathy (DN) model in rats. Methods: Forty male Sprague Dawley rats were divided into 5 groups of 8 rats each, namely the control (Group C), diabetes (Group D), aliskiren (Group A), paricalcitol (Group P), and aliskiren plus paricalcitol (Group A+P) groups. Aliskiren was given by oral-gavage at a dose of 50 mg/kg/day once daily for 12 weeks. Paricalcitol was given by intraperitoneally at a dose of 0,4 µg/kg/three day of week for 12 weeks. Renal function parameters, oxidative stress biomarkers, mRNA expression of renin-angiotensin system parameters and kidney histology were determined. Results: Group A+P had lower mean albümin-to-creatinine ratio (ACR) (p=0.004) as well as higher creatinine clearance (CCr) (p
- Published
- 2014
9. Effects of prenatal PPAR-γ agonist rosiglitazone exposure on rat hippocampus development in a time-dependent manner: A stereological and histopathological study
- Author
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Sağır, D, primary, Eren, B, additional, Yılmaz, BD, additional, Eren, Z, additional, Keleş, ON, additional, and Gökçe, AB, additional
- Published
- 2017
- Full Text
- View/download PDF
10. Evaluation of the effects of a high dose of erythropoietin-beta on early endotoxemia using a rat model
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Eren, Z., Çoban, J., Ekinci, I.D., Kaspar, C., Kantarci, G., Eren, Z., Çoban, J., Ekinci, I.D., Kaspar, C., Kantarci, G., and Yeditepe Üniversitesi
- Subjects
Lipopolysaccharide ,Erythropoietin ,Endotoxemia ,Acute kidney injury - Abstract
Background. Endotoxins can cause serious organ damage and death by triggering the secretion of pro-inflammatory cytokines such as TNF-?, IL-6 and IL-Iß in bacterial infections. Objectives. The goal of this study was to evaluate the effects of a high dose (3000 U/kg) of erythropoietin-beta (EPO) on inflammatory cytokine levels, renal function and histological changes during the early period of Lipopolysaccharide (LPS)-induced endotoxemia using a rat model. Material and Methods. Male Sprague Dawley (350-400 g) rats were randomized into 3 groups: Control group (n = 7); LPS group (received 20 mcg/kg LPS through intraperitoneal (i.p.) injection (n = 7); LPS+EPO group (received 3000 U/kg, ip 30 minutes before LPS administration (n = 7). Four hours after the administration of LPS, kidney tissue and serum samples were collected. Kidney function parameters, TNF-?, IL-6, IL-1ß, C reactive protein (CRP) and complete blood counts (CBC) were measured. The severity of renal tubular injury and caspase-9 immunoreactive cells was expressed as a percentage. Results. Serum levels of urea, creatinine, TNF-?, IL-6 and IL-1ß were significantly increased in the LPS group (p < 0.0001 - p = 0.04) and were lower in LPS+EPO group (p < 0.0001, p = 0.01, p = 0.02, p = 01 and p < 0.0001, respectively). Pretreatment with EPO significantly increased platelet counts (p = 0.00) and decreased white blood cell counts (p = 0.02). The renal tubular injury percentage was significantly higher in the LPS group than in the control and LPS+EPO groups (p = 0.002, p = 0.003, and p = 0.005, respectively) and caspase-9 expression was lower in the LPS+EPO and control groups than in the LPS group. Conclusions. EPO might have renoprotective effects against the inflammatory process and cell apoptosis during endotoxemia. © Copyright by Wroclaw Medical University.
- Published
- 2012
11. Hepatoprotective effects of erythropoietin (EPO) in the lipopolysaccharide (LPS) induced endotoxemia
- Author
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Coban, J, Ozkan, F, Eren, Z, Ozmen, G, Yesil, K, Oztezcan, S, Coban, J, Ozkan, F, Eren, Z, Ozmen, G, Yesil, K, Oztezcan, S, and Yeditepe Üniversitesi
- Subjects
education - Abstract
… Federat Soc Biochem & Mol Biol
- Published
- 2011
12. Effects of prenatal PPAR-γ agonist rosiglitazone exposure on rat hippocampus development in a timedependent manner: A stereological and histopathological study.
- Author
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Sağır, D., Eren, B., Yılmaz, B. D., Eren, Z., Keleş, O. N., and Gökçe, A. B.
- Subjects
ROSIGLITAZONE ,THIAZOLIDINEDIONES ,TYPE 2 diabetes treatment ,INSULIN ,PEROXISOME proliferator-activated receptors ,PYRAMIDAL neurons - Abstract
Rosiglitazone is in the thiazolidinedione class of drugs used in the treatment of type 2 diabetes mellitus. It works as an insulin sensitizer by binding to the peroxisome proliferator-activated receptor gamma. We investigated the effects of prenatally administered rosiglitazone on pyramidal cell numbers and morphologies in the hippocampus at postnatal period using histochemical and stereological techniques, congenital morphological properties and the number of offspring in rats. Eighteen female rats were grouped into control (C), low-dose rosiglitazone (LDR) and high-dose rosiglitazone (HDR). LDR pregnant rats received 2 mg/kg/day of rosiglitazone via oral gavage during the first 16 days of the pregnancy. HDR rats received 5 mg/kg/day. The infants were grouped into newborn (NB), 4 week (4 W) and 12 week (12 W). A side from histopathologic and congenital assessments, stereological analyses were performed using the optical fractionator method. Congenital anomaly was not detected in any of the rosiglitazone treatment groups, and their number of offspring was similar to that of the C group. Stereological counts revealed a significant reduction in the number of hippocampal pyramidal cells in the C and LDR groups but not in the HDR group until birth to 12th week. When NB groups were compared, the number of pyramidal cells in the HDRNB group was less than those in the LDRNB and CNB groups. HDR affected apoptosis or the proliferation and maturation of progenitor cells to the pyramidal neuron during neurodevelopment in the hippocampus, whereas LDR did not adversely affect neuronal development and did not cause congenital anomalies. [ABSTRACT FROM AUTHOR]
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- 2018
- Full Text
- View/download PDF
13. Ecotourism Policy Supported By Environmental Planning Procedure - An Environmental Planning Experience. Case Of Identification Of Igneada As An Eco-Town
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Töre, Evrim, Çevik, Gülay, Gökdemir, M., Eren, Z. O., and Korkmaz, Z.
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Eco-Town ,Alternatif Eko-Turizm Faaliyetleri ,Sürdürülebilir Turizm ,Alternative Eco-Tourism Activities ,Çevre Planı ,Igneada ,Eko-Kent ,İğneada ,Environmental Plan ,Sustainable Tourism - Abstract
Tourism demand is mainly generated by environmental assets, natural beauties, and cultural heritage. To perpetuate the tourism demand these assets, potentials must be preserved for forthcoming generations. This vicious cycle leads us to the importance of use and preservation balance approach and the issue of sustainability and corporate social responsibility which are crucial to sustainable tourism. In this frame, Igneada, located on the skirts of the Istiranca mountains and on the Black Sea coast, has great potantials. In this study, the existing socio-economical conditions of local people and the potentials of Igneada for ecotourism are examined and the alternative ecotourism activities and ecotourism products using the local potentials for Igneada (and the nearby villages) are given. The case of Igneada is examined regarding the 1/25 000-scaled Environmental Plan decisions of the city of Kirklareli as a considerable step in legalisation towards its identification as an eco-town.
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- 2012
14. Evaluation Of Settlements On The Coastal Regions Of Thrace Regarding Current Laws And Regulations
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Töre, Evrim, Eren, Z. O., Çevik, Gülay, Korkmaz, Z., and Gökdemir, M.
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Coastal Areas ,İmar Mevzuatı ,İkinci Evler (yazlık evler) ,Thrace Sub-Region ,Second Homes (summer houses) ,Zoning Legislation ,Kıyı Bölgeleri ,Trakya Alt Bölgesi - Abstract
During the last 3 decades, the coastal areas of Thrace sub-region have become a favourite summer resort for the inhabitants of Istanbul who are in need of running away from the metropolis jam and in aspiration of holiday and nature. From 1980's till today, the tourism activities on the coastal regions have had a great influence on land use, while the sea front and the natural areas have confronted with a great pressure of second home development. This process is encouraged by the zoning legislation which is environmentally insufficient and the law regarding environment which has lately come into force. Therefore, the infringement of areas subject to public interest and the destruction of natural resources is ineviatable to be hindered which in consequence triggers lots of problems. In this study, the second home development on the coastal areas of the sub-region is analysed regarding the effects Of related codes and regulations. The analysis mainly reveals the lack of an effective legislative infrastructure and a management model regarding the coastal areas.
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- 2012
15. A Grubu Strepkok İnfeksiyonlarının Tanısında Boğaz Kültürü ve Hızlı Lateks Aglutinasyon Yönteminin Karşılaştırılması
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DURUPINAR, B., KUYUMCU, C., and EREN, Z.
- Abstract
SUMMARYRapid latex agglutination compared with the throat culture for the dedetection of Group A streptococcal infection.In this study the (Direct Antigen Identification D.A.I. Strep A test) was compared with the throat culture for accuracy in detecting Group A-beta-hemolytic streptococci on paired throat swabs from 500 children. In this comparison the Direct Antigen Identification test kit had a sensitivity of 79 %; specifity 85 %. positive predictive value 91 %, and negative pre¬dictive value 67 %. When cultures with less than 10 colonies of group A beta-homolytic streptococci per plate were not considered positive, rapid latex agglutination test had a sensitivity of 83 %, specifity % 86, positive predictive value % 92, and negative predictive value % 74.ÖzetÇalışmamızda 500 çocuktan alınan çift boğaz kültüründe A grubu beta-hemolitik streptokokları tanımlama yönünden (Direct Antigen Identification D.A.I. Strep A Test)'in doğruluğu boğaz kültürüyle karşılaştırılmıştır. Testin hassasiyeti % 79, özgüllüğü % 85, tahmini pozitiflik .% 91, tahmini nega¬tiflik % 67'dir. Plak başına 10 koloniden az A-grubu beta-hemolitik streptokok üremesi olan kültürler pozitif olarak değerlendirilmediğinde, lateks aglutinasyon testinin hassasiyeti % 83, özgüllüğü % 86, tahmini pozitiflik % 92, tahmini negatiflik % 74 olmuştur.
- Published
- 2009
16. Effect of melatonin on the antioxidant enzyme status in the liver of swiss albino laboratory mice in single circadian rhythm
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ikbal agah ince, Eren, Z., Gürkanli, I., and Ondokuz Mayıs Üniversitesi
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Liver ,Antioxidant enzymes ,Superoxide dismutase ,Catalase ,Melatonin - Abstract
Melatonin has been shown to be an effective antioxidant in a number of experimental models both in vitro and in vivo. However, limited information is available on monitoring the effect of melatonin on the antioxidant enzyme status in the liver in single circadian rhythm. To monitor the effect of melatonin on antioxidant enzyme activity, we used Swiss albino inbred male mice as a model system. The crude enzyme fractions were prepared from freshly isolated livers at 0, 2, and 24 hours as light cycle and 4, 8, and 12 hours as dark cycle specimens, post injection of melatonin. The injection of melatonin resulted in a statistically significant decrease in activity of SOD compared to control group (p
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- 2009
17. Effect of glucose-insulin-potassium infusion on Oxidative stress in patients with dilated cardiomyopathy
- Author
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Diraman E., Demircan G., Demircan S., Yazici M., Durna K., Ural F., Eren Z., and Ondokuz Mayıs Üniversitesi
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Glucose ,Cardiomyopathy ,Oxidative stress ,Potassium ,Insulin - Abstract
Objective: To investigate the effect of glucose-insulin-potassium (GIK) infusion on erythrocyte antioxidant enzyme activity levels during therapy and post-therapy in patients with dilated cardiomyopathy (DCM). Methods: Forty-one patients with DCM were enrolled in the present study. GIK solution (50 U of insulin in 500 mL of 30% glucose, plus 60 mmol/L KCl), in addition to the standard treatment, was administered by 24 h infusion in 28 patients (GIK group). In the remaining 13 patients (control group), 0.9% NaCl solution was administered. Venous blood samples from all patients were collected at baseline, during therapy (2 h, 8 h, 12 h and 24 h after baseline) and after therapy (48 h after baseline). The activity levels of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSHP) were measured. Results: In the GIK group, SOD values showed a significant increase at 24 h and 48 h compared with baseline and 2 h values (P0.05). With regard to GSHP activity, no significant change was found in the GIK group during follow-up (P>0.05). In the control group, SOD, CAT and GSHP activity levels measured during and after therapy were found to be similar to those measured at baseline (P>0.05). Conclusion: Administration of GIK solution, in addition to standard therapy, in patients with DCM may improve the metabolic scope of the disease by reducing myocardial oxidative stress. © 2008 Pulsus Group Inc. All rights reserved.
- Published
- 2008
18. The effects of aspirin and antioxidant butylated hydroxy anisole on the liver microsomal benzo (A) pyrene hydroxylase activity in mice (Mus musculus)
- Author
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Eren, Z and Ondokuz Mayıs Üniversitesi
- Abstract
WOS: A1997WN54000007 In this study the effects of Aspirin and antioxidant Butylated Hydroxy Anisole (BHA) were studied individually and together on the liver microsomal Benzo Ta) Pyrene Hydroxylase (BPH) activity in mice (Mus musculus). Aspirin and BHA were given to mice by intraperitoneal injection and after the injection at the 2(nd), 4(th), 8(th), 12(th) and 24(th) hours mice were killed by cervical dislocation, their livers were removed, and the microsomal fractions were isolated by differantial centrifugation. These fractions were used for the determination of alteration of BPH activities. As a result, it was determined that Aspirin and BHA inhibited the BPH activity. The maximum inhibitions were reached between 8th - 12th hours after the injections. The levels of inhibitions obtained by Aspirin injected with BHA were higher than those of substances injected individually.
- Published
- 1997
19. Repeated Determinations of Arterial Vascular Stiffness in Transplanted Patients Show a Significant Correlation with Kidney Graft Function
- Author
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Scholze, A., primary, Eren, Z., additional, and Tepel, M., additional
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- 2012
- Full Text
- View/download PDF
20. Antioxidant and renoprotective effects of paricalcitol on experimental contrast-induced nephropathy model
- Author
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Ari, E, primary, Kedrah, A E, additional, Alahdab, Y, additional, Bulut, G, additional, Eren, Z, additional, Baytekin, O, additional, and Odabasi, D, additional
- Published
- 2012
- Full Text
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21. Antihypertensive Effect of Benazepril in Patients With Chronic-Renal-Failure Undergoing Hemodialysis
- Author
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SOYDAN, M, EREN, Z, ONBASI, O, and Anadolu Üniversitesi, Tıp Fakültesi
- Abstract
WOS: A1995TA83000059, …
- Published
- 1995
22. JC virus-associated nephropathy in a renal transplant recipient and comparative analysis of previous cases
- Author
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Kantarci, G., primary, Eren, Z., additional, Demirağ, A., additional, Dogan, I., additional, Çakalagaoglu, F., additional, and Yilmaz, G., additional
- Published
- 2010
- Full Text
- View/download PDF
23. A NEW PROBLEM FOR RENAL TRANSPLANT RECıPıENTS: A CASE OF JC VıRUS ASSOCıATED NEPHROPATHY
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kantarci, G., primary, eren, Z., additional, Demirağ, A., additional, Dogan, I., additional, Çakalagaoglu, F., additional, and Ylmaz, G., additional
- Published
- 2010
- Full Text
- View/download PDF
24. Recombinant human erythropoietin (rHuEpo) in chronic renal failure
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Akalın, A., Eren, Z., Gezer, S., Erenoğlu, E., and Anadolu Üniversitesi, Tıp Fakültesi
- Subjects
Hemodialysis ,Anemia ,Erythropoietin - Abstract
[No abstract available]
- Published
- 1993
25. Pregnancy in Women With Focal Hyalinosis and Sclerosis
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Eren, Z, Dönmez, T, Paşaoğlu, O, Dolen, I, Erenoğlu, E, and Anadolu Üniversitesi
- Abstract
WOS: A1991GF68700008, PubMed ID: 1934672, …
- Published
- 1991
26. Pregnancy in women with focal hyalinosis and sclerosis [2]
- Author
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Eren, Z., Dönmez, T., Paşaoğlu, O., Dolen, I., Erenoğlu, E., Packham, D. K., and Anadolu Üniversitesi, Tıp Fakültesi
- Abstract
PubMed: 1934672, [No abstract available]
- Published
- 1991
27. Hemodiyaliz hastalarınının serumlarında HBV, HIV ve CMV antikorlarının saptanması
- Author
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güre, f, eren, z, KÖSE, ŞÜKRAN, çolak, h, usluer, g, and akgün, y
- Published
- 1991
28. Two different gastrointestinal ascariasis cases
- Author
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Yilmaz, N., primary, Uzunköy, A., additional, Akinci, O.F., additional, Nazugül, Y., additional, Çoşkun, A., additional, and Eren, Z., additional
- Published
- 1998
- Full Text
- View/download PDF
29. Paraoxonase 1 Polymorphisms in Patients With Primary Glomerulonephritis: a Single-center Study in Turkey.
- Author
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Eren Z, Kantarci G, Biyikli N, Arikan H, Tuglular S, Ergen A, Isbir T, and Akoglu E
- Abstract
Introduction. Human paraoxonase 1 (PON1) is an enzyme related with high-density lipoprotein cholesterol. The link between genetic polymorphisms of PON1 and hyperlipidemia and increased lipid oxidation may explain these complications in the course of glomerular diseases. In this study, we aimed to investigate PON1 192 and PON1 55 polymorphisms in patients with primary glomerulonephritis and healthy individuals. Materials and Methods. Eighty-six patients with biopsy-proven primary glomerulonephritis and 50 healthy controls were included in the study. Clinical characteristics, lipid profile, paraoxonase activity, and PON1 genotypes (PON1 192 and PON1 55) of all of the participants were studied. Results. Histopathological diagnoses of the patients were membranoproliferative glomerulonephritis (53.5%), focal segmental glomerulosclerosis (33.7%), and membranous nephropathy (12.8%). The patients had lower PON1 activity levels than the healthy controls. No differences were observed in PON1 192 genotypes between the two groups. However, the controls were more likely to carry PON1 55 LM genotype (odds ratio, 4.10; 95% confidence interval, 1.96 to 8.61; P < .001) and M allele (odds ratio, 3.0; 95% confidence interval, 1.45 to 6.19; P = .003) compared to the patients with primary glomerulonephritis. There was a marked elevation in the frequency of PON1 55 LL genotype in the patients compared to the controls (odds ratio, 0.33; 95% confidence interval, 0.16 to 0.68; P = .003). Conclusions. This preliminary study shows that the LL genotype might be a risk factor for the development of primary glomerulonephritis and the M allele might be a protective factor against its progression. [ABSTRACT FROM AUTHOR]
- Published
- 2012
30. The effect of glucose-insulin-potassium treatment on myocardial oxidative stress in patients with acute coronary syndromes undergoing percutaneous coronary intervention.
- Author
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Demircan S, Yazici M, Diraman E, Demircan G, Kilicaslan F, Durna K, Acar Z, and Eren Z
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- 2008
- Full Text
- View/download PDF
31. Effects of open- and self-pollination treatments on genetic estimations in maize diallel experiment
- Author
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Fatih Kahriman, Cem Ömer Egesel, and Eren Zorlu
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protein ,oil ,carbohydrate content ,pollen effect ,Zea mays ,Agriculture - Abstract
This study investigated the effects of open- and self-pollination treatments on genetic estimations and kernel biochemical content in a maize diallel experiment. A 7×7 complete reciprocal diallel set (7 parents and 42 hybrids) was used as plant material. Measured traits were: kernel weight per plant, protein content, oil content and carbohydrate content. General combining ability (GCA), specific combining ability (SCA), maternal effects (MAT), non-maternal effects (NMAT) and heterosis values were compared in open- and self-pollination treatments for measured traits. Results showed that the pollination treatments had a significant effect on all investigated traits. Parental lines and hybrid combinations gave different responses. Parents had relatively higher protein and oil content in self-pollination but hybrids had lower values in self-pollination compared with open-pollination. A considerable number of genotypes showed significant differences for genetic estimations (GCA, SCA, MAT, NMAT) and heterosis between open- and self-pollination treatments. Overall, findings suggest that evaluation of kernel quality traits should be made on selfed ear samples; however, evaluation for yield should be carried out on open-pollinated samples.
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- 2015
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- View/download PDF
32. Comparison of aspirin's antioxidant effect with selenium and vitamin E by measuring mitochondrial selenium dependent glutathione peroxidase and cytosolic total glutathione peroxidase activity in mice liver
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Çebi A., Diraman E., Eren Z., Belirlenecek, and Ondokuz Mayıs Üniversitesi
- Subjects
Selenium ,Aspirin ,Liver ,Vitamin E ,Selenium dependent glutathione peroxidase ,Cytosolic total glutathione peroxidase - Abstract
Cebi, Aysegul/0000-0003-3804-7966 WOS: 000264758900074 In this study, the antioxidant effect of aspirin was studied and compared with selenium and vitamin E on the activities of mitochondrial selenium dependent glutathione peroxidase (Se-GPX) and cytosolic total glutathione peroxidase (t-GPX). After the injection of selenium, vitamin E and aspirin intraperitonally to the mice, they were killed by servical dislocation at the 2, 4, 8, 12 and 24 h and their livers were removed. Enzyme fractions were obtained from livers. Mitochondrial fractions were used to find out the changes in the Se-GPX activities and cytosolic fractions were used to find out the changes in the total GPX activity. Aspirin increased cytosolic t-GPX activity in 12 and 24 h and mitochondrial Se-GPX activity in 8 h when compared with controls (p < 0.05). The t-GPX activity was less than vitamin E in 2 h and selenium in 12 h (p < 0.05). The study shows that aspirin has an antioxidant effect by increasing the cytosolic t-GPX and mitochondrial SeGPX activity. The antioxidant effect of aspirin is less than selenium and vitamin E.
33. Paraoxonase 1 polymorphisms in patients with primary glomerulonephritis, a single-center study in Turkey
- Author
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Eren, Z., Kantarci, G., Biyikli, N., Arikan, H., Tuglular, S., arzu ergen, Isbir, T., and Akoglu, E.
34. A case of nephrotic syndrome with chronic pyelonephritis.
- Author
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Eren, Z., Paşaoˇlu, Ö., and Işiksoy, S.
- Published
- 1993
35. Probiyotik tedavisinden sonra yaşli bir hastada gelişen Saccharomyces cerevisiae fungemisi
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Hatice Seyma Eren, Gulcin Kantarci, Gülden Çelik, Meral Sonmezoglu, Yeşim Gürol, Zehra Eren, Eren, Z, Gurol, Y, Sonmezoglu, M, Eren, HS, Celik, G, Kantarci, G, Yeditepe Üniversitesi, Eren, Z., Gürol, Y., Sönmezoglu, M., Eren, H.Š., Çelik, G., and Kantarci, G.
- Subjects
Diarrhea ,Microbiology (medical) ,medicine.medical_specialty ,Urinary system ,Saccharomyces cerevisiae ,Gastroenterology ,Meropenem ,chemistry.chemical_compound ,Intestinal mucosa ,Internal medicine ,Humans ,Medicine ,Blood culture ,caspofungin ,Fungemia ,Aged, 80 and over ,fungemia ,General Immunology and Microbiology ,medicine.diagnostic_test ,business.industry ,Probiotics ,medicine.disease ,Anti-Bacterial Agents ,Causality ,Infectious Diseases ,chemistry ,Linezolid ,Female ,medicine.symptom ,business ,probiotic ,Fluconazole ,medicine.drug - Abstract
Saccharomyces cerevisiae, known as baker's yeast, is also used as a probiotic agent to treat gastroenteritis by modulating the endogenous flora and immune system. However, since there have been increasing reports of fungemia due to S.cerevisiae and its subspecies S.boulardii, it is recommended that probiotics should be cautiously used in immunosuppressed patients, people with underlying diseases and low-birth weight babies. To emphasize this phenomenon, in this report, a case of S.cerevisiae fungemia developed in a patient given probiotic treatment for antibiotic-associated diarrhea, was presented. An 88-year-old female patient was admitted to our hospital with left hip pain, hypotension, and confusion. Her medical history included hypertension, chronic renal failure, left knee replacement surgery, and recurrent urinary tract infections due to neurogenic bladder. She was transferred to the intensive care unit with the diagnosis of urosepsis. After obtaining blood and urine samples for culture, empirical meropenem (2 x 500 mg) and linezolid (1 x 600 mg) treatment were administered. A central venous catheter (CVC) was inserted and after one day of inotropic support, her hemodynamic parameters were stabilized. The urine culture obtained on admission yielded extended-spectrum beta-lactamase-producing Klebsiella pneumoniae and Escherichia coli. Urine culture was repeated after three days and no bacteria were isolated. On the 4th day of admission she developed diarrhea. Toxin A/B tests for Clostridium difficile were negative. To relieve diarrhea, S.boulardii (Reflor 250 mg capsules, Sanofi Aventis, Turkey) was administered twice a day, without opening capsules. Two days later, her C-reactive protein (CRP) level increased from 23.2 mg/L to 100 mg/L without fever. Her blood culture taken from the CVC yielded S.cerevisiae. Linezolid and meropenem therapies were stopped on the 13th and 14th days, respectively, while prophylactic fluconazole therapy was replaced with caspofungin 1 x 50 mg on the fifth day. After seven days of therapy CRP and serum creatinine levels decreased to 9.1 mg/L and 1.2 mg/dl, respectively; and she was discharged from the hospital with improvement. The probiotic capsules were used unopen, thus, it was proposed that S.cerevisiae fungemia originated from translocation from the intestinal mucosa. Since it was not possible to investigate the molecular genetics of the strain isolated from the blood culture and the strain present in the probiotic, a definite conclusion about the origin of the strain could not be reached. It was thought that old age and underlying disease of the patient were the related predisposing factors for S.cerevisiae fungemia. This case emphasized that clinicians should be cautious in case of probiotic application even though in encapsulated form, even in immunocompetent patients with a history of long-term hospital stay and use of broad-spectrum antimicrobials since there may be a risk of S.cerevisiae fungemia development.
- Published
- 2014
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36. Cinacalcet may improve oxidative DNA damage in maintenance hemodialysis patients: an observational study
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Ebru Asicioglu, Halit Demir, Hakki Arikan, Yüksel Kaya, Zehra Eren, Elif Ari, Eray Celik, Ari, E, Kaya, Y, Demir, H, Asicioglu, E, Eren, Z, Celik, E, Arikan, H, and Yeditepe Üniversitesi
- Subjects
Adult ,Male ,medicine.medical_specialty ,Cinacalcet ,Urology ,Naphthalenes ,medicine.disease_cause ,Carotid Intima-Media Thickness ,Superoxide dismutase ,chemistry.chemical_compound ,Renal Dialysis ,Internal medicine ,medicine ,Deoxyguanosine ,Humans ,cardiovascular diseases ,Prospective Studies ,chemistry.chemical_classification ,biology ,business.industry ,Glutathione peroxidase ,Paraoxonase ,medicine.disease ,Malondialdehyde ,Atherosclerosis ,Oxidative Stress ,Endocrinology ,chemistry ,Nephrology ,Oxidative stress ,8-Hydroxy-2'-Deoxyguanosine ,Hemodialysis ,biology.protein ,cardiovascular system ,DNA damage ,Secondary hyperparathyroidism ,Female ,Endothelium, Vascular ,business ,medicine.drug ,DNA Damage - Abstract
Oxidative stress is accepted as a non-classical cardiovascular risk factor in patients on maintenance hemodialysis (HD). The aim of this study was to evaluate the impact of cinacalcet on oxidative stress biomarkers, oxidative DNA damage (8-hydroxy-2′-deoxyguanosine/deoxyguanosine), endothelial function (FMD %) and carotid artery intima-media thickness (CIMT) in HD patients. Forty-two chronic HD patients with secondary hyperparathyroidism undergoing 60 mg/day cinacalcet treatment with a follow-up of 6 months and 38 age- and sex-matched healthy individuals were included in this prospective study. Plasma malondialdehyde (MDA) levels and 8-hydroxy-2′-deoxyguanosine/deoxyguanosine ratio (8-OHdG/dG) were determined as oxidative stress markers. Superoxide dismutase (SOD), paraoxonase (PON), catalase (CAT), carbonic anhydrase (CAN) and glutathione peroxidase (GPx) activities were measured as antioxidants. FMD % and CIMT were assessed by ultrasonography. MDA levels were decreased; SOD, PON, CAT, CAN and GPx activities were increased after 6 months of cinacalcet treatment in HD patients. Although CIMT remained stabile, there was a significant improvement in FMD % as well as a notable reduction trend in 8-OHdG/dG ratio after 6 months of treatment. Our data have demonstrated that cinacalcet improves oxidative stress, genomic damage, endothelial function and increases antioxidant protection in HD patients after 6 months of treatment.
- Published
- 2014
37. What can we change in the life of hemodialysis patients? the results of a project
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Elif Cigdem Kaspar, Zehra Eren, Elif Ari Bakir, Selim Ozbilir, Fuat Balsak, Semih Bakir, Eren, Z., Bakir, E.A., Kaspar, E.Ç., Bakir, S., Balsak, F., Özbilir, S., and Yeditepe Üniversitesi
- Subjects
medicine.medical_specialty ,Beck Hopelessness Scale ,business.industry ,Urology ,medicine.medical_treatment ,Hemodialysis ,medicine ,Surgery ,Beck Depression Scale ,SF-36 Test ,Intensive care medicine ,business ,Beck Anxiety Scale ,Nutrition - Published
- 2012
38. Risk Factors for Acute Kidney Injury After Hip Fracture Surgery in the Elderly Individuals
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Turhan Özler, Gülçin Kantarci, Elif Cigdem Kaspar, Korcan Yuksel, Zehra Eren, Çağatay Uluçay, Faik Altintas, Ulucay, C., Eren, Z., Kaspar, E.C., Ozler, T., Yuksel, K., Kantarci, G., Altintas, F., and Yeditepe Üniversitesi
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Nephrology ,medicine.medical_specialty ,medicine.medical_treatment ,Renal function ,lcsh:Geriatrics ,urologic and male genital diseases ,surgery ,lcsh:Orthopedic surgery ,Internal medicine ,medicine ,eGFR ,Orthopedics and Sports Medicine ,Renal replacement therapy ,acute kidney injury (AKI) ,Prospective cohort study ,Research Articles ,Surgical team ,Hip fracture ,business.industry ,Rehabilitation ,Acute kidney injury ,Odds ratio ,medicine.disease ,female genital diseases and pregnancy complications ,Surgery ,lcsh:RD701-811 ,lcsh:RC952-954.6 ,trauma ,hip fracture ,Geriatrics and Gerontology ,business - Abstract
Objective: We aimed to evaluate possible risk factors assocıated wıth acute kidney injury (AKI) after hip fracture surgery in the elderly individuals. Design: Level II diagnostic study, evidence obtained from prospective cohort study from 1 center with level 2, and 3 patients. Patients: A total of 165 patients (>65 years) with femoral neck fracture were enrolled in this prospective study between 2007 and 2010. Two patients were dropped for inadequate laboratory follow-up data. Patients with kidney failure or renal replacement therapy (RRT) history or AKI at admission were excluded. Intervention: Nephrology consultation was obtained from all patients at admission. All patients had undergone bipolar cemented hip arthroplasty that was performed by the same surgical team in all patients within 24 hours of fracture and admission under the same protocol. Main Outcome Measurements: Serum creatinine (SCr), urine output, and complete blood counts were evaluated at baseline and daily basis thereafter. The AKI was defined based on Acute Kidney Injury Network classification. Hospital charges were converted from Turkish Liras to US dollars and rounded. Results: Among 163 patients, AKI occurred in 25 (15.3%) patients, all within the first 48 postoperative hours. Three (1.8%) patients required RRT. Baseline SCr levels were restored within 4.84 ± 1.34 days on average (3-8 days). No patient required RRT after discharge. The mean hospital stay was 3 days (2-6 days) longer and the hospital charge was 2500 US$ higher for the patients with AKI. After multivariable adjustment, only lower estimated glomerular filtration rate levels (odds ratio 0.945, 95%confidence interval 0.92-0.96) emerged as an independent predictor for AKI. Conclusion: The AKI represents a frequent complication after hip fracture surgery associated with longer hospital stay and higher treatment costs with increased morbidity. Our results show baseline renal function is an independent predictor of AKI. © 2012, SAGE Publications. All rights reserved.
- Published
- 2012
39. A Single-Centre Study of Acute Cardiorenal Syndrome: Incidence, Risk Factors and Consequences
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Gülçin Kantarci, Elif Buvukoner, Elif Cigdem Kaspar, Zehra Eren, Muzaffer Degertekin, Olcay Ozveren, Eren, Z, Ozveren, O, Buyukoner, E, Kaspar, E, Degertekin, M, Kantarci, G, and Yeditepe Üniversitesi
- Subjects
medicine.medical_specialty ,Acute coronary syndrome ,Original Paper ,Acute decompensated heart failure ,business.industry ,Urology ,Acute kidney injury ,Retrospective cohort study ,Cardiorenal syndrome ,medicine.disease ,Acute renal failure ,Chronic kidney disease ,Internal medicine ,Statistics and epidemiology ,medicine ,Acute cardiorenal syndrome ,Myocardial infarction ,Risk factor ,Cardiology and Cardiovascular Medicine ,Intensive care medicine ,business ,Kidney disease - Abstract
Objective: Cardiac and kidney diseases are common, and the impact of acute kidney injury (AKI) on patient outcome is well known. We aimed to investigate the incidence of acute cardiorenal syndrome (CRS) and the risk factors and outcomes associated with the disease. Methods: We conducted a retrospective cohort study comprising 289 patients with acute coronary syndrome (ACS) and acute decompensated heart failure (ADHF), examining the incidence of AKI defined according to the Acute Kidney Injury Network (AKIN) classification, the factors contributing to AKI, and the impact of AKI on in-hospital mortality and hospital re-admission. Results: Of 71 patients with AKI, 36 (50.7%) had ACS and 35 (49%) had ADHF. Overall in-hospital mortality was 5.5% (n = 16). Multivariate logistic regression identified the following independent predictors of AKI in male patients with ACS: previous myocardial infarction at age >65 years (OR 5.967, 95% CI 1.16–30.47, p = 0.03), chronic kidney disease (OR 3.72, 95% CI 1.31–16.61, p = 0.01), and decreased hemoglobin levels (OR 0.684, 95% CI 0.53–0.88, p = 0.03). No variable was identified as an independent risk factor in ADHF patients. Kaplan-Meier survival curves indicated that patients with ACS plus AKI had significantly higher in-hospital mortality (log rank = 0.007). Conclusion: Acute CRS (type 1 CRS) is more frequent in patients with ADHF and can be considered multifactorial. Although CRS is less frequent in ACS patients, it is associated with longer hospital stay and with higher in-hospital mortality. The heart-kidney interaction should be managed collaboratively between cardiologists and nephrologists to increase our knowledge and enhance clinical approaches.
- Published
- 2011
40. The determination of wide-range pharmaceuticals class in Erzurum biological wastewater treatment plant using liquid chromatography coupled to tandem mass spectrometry: occurrence, treatment efficiency, and environmental risk assessment.
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Eren Z
- Subjects
- Pharmaceutical Preparations analysis, Risk Assessment, Chromatography, Liquid, Waste Disposal, Fluid, Rivers chemistry, Water Pollutants, Chemical analysis, Tandem Mass Spectrometry, Wastewater chemistry, Environmental Monitoring methods
- Abstract
Pharmaceuticals as an important group of contaminants of emerging concern (CECs) are unintentionally discharged into the aquatic environment due to lack of advanced treatment of classical wastewater treatment plants (WWTPs). Therefore, the detection and monitoring studies of pharmaceuticals and personal care products (PPCPs) in an aquatic environment are getting more important as well as the definition of their ecological risks to the aquatic ecosystem. To conduct these studies successfully, it is necessary to develop sensitive, robust, selective, and reliable methods to be able to analyze PPCPs. This study was carried out in the biological WWTP (BWWTP) of Erzurum City, Türkiye, to investigate the treatment efficiency of pharmaceuticals in the plant and to assess the ecological risks for the Karasu River where treated wastewater is discharged into it. For this purpose, a wide range of pharmaceutical classes in influent wastewater (IWW) and effluent wastewater samples taken from Erzurum BBWWTP, Türkiye was simultaneously identified and quantified with liquid chromatography coupled with tandem mass spectrometry following liquid phase extraction for sample preparation. A total of 55 active pharmaceutical groups in 25 general drug groups (29 subgroups) were detected, with the highest average ratios being 82.459%, 7.306%, 4.949%, and 2.145% for analgesic-anti-inflammatory, antiepileptic, diabetic, and antipyretic pharmaceuticals groups, respectively, in IWW. Although flurbiprofen from the analgesic-anti-inflammatory pharmaceuticals group was treated with the average efficiency of 66.13% during the 12-month treatment period, it had a high risk quotient due to the very high initial concentration in WWT in the range of 809.01-22,901.10 µg/L., (© The Author(s) 2025. Published by Oxford University Press on behalf of the Society of Environmental Toxicology and Chemistry. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.)
- Published
- 2025
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41. Dual-frequency ultrasonic oxidation of cyanobacterial toxins (MC-LR and MC-RR) at drinking water resources: Assessment of analytical methods and ultrasonic reactor configuration.
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Eren Z
- Subjects
- Ultrasonic Waves, Cyanobacteria Toxins, Bacterial Toxins analysis, Bacterial Toxins chemistry, Cyanobacteria chemistry, Tandem Mass Spectrometry, Microcystins analysis, Microcystins chemistry, Oxidation-Reduction, Marine Toxins analysis, Drinking Water analysis, Drinking Water chemistry
- Abstract
Ultrasonic oxidation provides the degradation of a wide range of water pollutants to the final products defined as carbon dioxide, short-chain organic acids, and inorganic ions, typically less toxic and favorable to biodegradation. In this study, it was investigated the application of novel ultrasonic reactor that allows the several combinations of low (20 kHz and 40 kHz) and high frequency ultrasonic piezoceramic transducer (578 kHz, 862 kHz and 1142 kHz) to degrade two main cyanobacterial toxins, Microcystin-RR (MC-RR) and Microcystin-LR (MC-LR). A plate transducer operating at different frequencies (40 kHz or 578 kHz/862 kHz/1142 kHz) was combined with a probe (20 kHz) as well as two plate transducers 40 kHz and 578 kHz/862 kHz/1142 kHz were combined to provide dual frequency ultrasonic reactor (DFUR). In order to carry out the study successfully, it is necessary to detect and monitor microcystins (MCs) using sensitive, robust, selective and reliable analytical methods. In this work, it was simultaneously identified and quantified with liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) without any phase extraction for sample preparation. Ultrasonic oxidation of MC-RR and MC-LR by DFUR exhibited more suitable degradation rate with second order than a very small difference from first-order reaction. A comprehensive standardization method for ultrasonic sources were considered based on calorimetry, chemical dosimetry, cavitational yield, energy efficiency as well., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024. Published by Elsevier B.V.)
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- 2025
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42. Epidemiological analysis of the victıms wıth crush syndrome in earthquakes of southeastern Turkey.
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Ozturk I, Gungor O, Ozturk S, Olmaz R, Keskin AJG, Kocyigit I, Sipahioglu MH, Dede F, Ulu S, Turgutalp K, Torun D, Sahutoglu T, Erdur FM, Altunoren O, Danis R, Yildiz G, Gurel A, Horoz M, Kucuksu M, Karakose S, Yildirim T, Altiparmak MR, Ayli MD, Tugcu M, Eren Z, Eroglu E, Yavuz YC, Akcali E, Sit D, Polat M, Yildirim S, Alagoz S, Bek SG, Pembegul I, Karaaslan T, Keles M, Sari F, Yilmaz U, Gorgulu N, Sahin G, Aydin Z, Yadigar S, Ulutas O, Selcuk NY, Ayar Y, Turgut D, Oto OA, Koc M, Yıldız A, Tuglular S, and Sever MS
- Subjects
- Adult, Aged, Female, Humans, Male, Middle Aged, Young Adult, Acute Kidney Injury therapy, Acute Kidney Injury epidemiology, Acute Kidney Injury etiology, Fluid Therapy, Hospital Mortality, Hyperkalemia epidemiology, Hyperkalemia therapy, Hyperkalemia etiology, Length of Stay statistics & numerical data, Renal Dialysis, Retrospective Studies, Turkey epidemiology, Crush Syndrome epidemiology, Crush Syndrome therapy, Crush Syndrome complications, Earthquakes, Disaster Victims statistics & numerical data
- Abstract
Background: Each year, millions face natural disasters, encountering mass fatalities and severe medical issues such as crush injuries and crush syndrome. Crush syndrome, marked by acute kidney injury (AKI) and hyperkalemia, correlates with mortality. This study focuses on presenting epidemiological data on kidney disease resulting from the February 6, 2023 earthquakes centered in Kahramanmaras., Methods: This retrospective analysis included patients diagnosed with crush syndrome after the 2023 Kahramanmaras earthquakes, treated in regional hospitals or referred elsewhere in Turkey. Patient data were documented using the web-based system developed by the Turkish Nephrology Association Renal Disaster Working Group., Results: Of the 1024 analyzed patients from 46 centers, 515 (50.3%) were women. The mean age was 41 ± 16 years, with a median duration of 12 h under rubble, and the median presentation time to the first health facility was 4 h after extrication from the rubble. Upon admission, 79.8% received intravenous fluid therapy, all potassium-free. Initial serum creatinine, K
+ , and creatinine kinase levels averaged 2.59 ± 2 mg/dl, 5.1 ± 1 mmol/L 38,305 ± 54,303 U/L, respectively. Intensive care unit (ICU) admissions were 53.6%, with mean hospital and ICU stays of 20 and 11 days, respectively. Compartment syndrome occurred in 40.8% of patients, with 75.8% undergoing fasciotomy. Acute kidney injury developed in 67.9% of patients, with 70.3% undergoing hemodialysis, totaling 3016 sessions on 488 patients. The overall in-hospital mortality rate was 9.8%., Conclusion: Earthquakes have a significant impact on kidney health. Although our study indicates some progress compared to previous earthquake responses, there remains a crucial need for drills emphasizing post-earthquake initial response, fluid-electrolyte balance management, and emergency dialysis protocols., Competing Interests: Declarations. Conflict of interest: The authors declare no conflict of interest. Ethical approval: The study was conducted in accordance with the Declaration of Helsinki. The study protocol was reviewed and approved by Istanbul University Istanbul Faculty of Medicine Clinical Research Ethics Committee (Decision date/no: 17.02.2023/04). Human and animal rights: This study does not contain any studies with animals performed by any of the authors. Informed consent: For this type of study, formal consent is not required., (© 2024. The Author(s) under exclusive licence to Italian Society of Nephrology.)- Published
- 2024
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43. Patients with crush syndrome and kidney disease: lessons learned from the earthquake in Kahramanmaraş, Türkiye.
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Ozturk S, Tuglular S, Olmaz R, Kocyigit I, Kibar MU, Turgutalp K, Torun D, Sahutoglu T, Usalan O, Gungor O, Danis R, Yildiz G, Gurel A, Horoz M, Kucuksu M, Karakose S, Yildirim T, Altiparmak MR, Ayli MD, Tugcu M, Eren Z, Eroglu E, Yavuz YC, Akcali E, Sit D, Polat M, Yildirim S, Alagoz S, Bek SG, Pembegul I, Karaaslan T, Keles M, Sari F, Inci A, Gorgulu N, Sahin G, Aydin Z, Yadigar S, Ulutas O, Selcuk NY, Ayar Y, Bal Z, Altunok M, Günes Keskin AJ, Sipahioglu MH, Ozkutlu M, Dursun B, Oruc A, Hasbal NB, Sevinc M, Gul S, Ozturk SS, Yildiz A, and Sever MS
- Subjects
- Humans, Male, Female, Middle Aged, Adult, Aged, Retrospective Studies, Risk Factors, Intensive Care Units statistics & numerical data, Disasters, Young Adult, Crush Syndrome therapy, Crush Syndrome complications, Crush Syndrome diagnosis, Crush Syndrome blood, Crush Syndrome mortality, Earthquakes, Hospital Mortality, Acute Kidney Injury mortality, Acute Kidney Injury therapy, Acute Kidney Injury diagnosis, Acute Kidney Injury etiology, Acute Kidney Injury blood
- Abstract
This study investigated in-hospital outcomes and related factors in patients diagnosed with postearthquake crush syndrome after the earthquakes in Kahramanmaraş, Türkiye. One thousand twenty-four adult patients diagnosed with crush syndrome were analyzed. Data on demographic characteristics, clinical presentation, laboratory values, treatments, and outcomes were collected. A total of 9.8% of patients died during their hospital stay. Nonsurvivors were generally older, more likely to have preexisting chronic kidney disease, and faced more severe injuries and complications, including hypotension-shock, arrhythmias, elevated markers of renal dysfunction, and higher rates of acute kidney injury (AKI) and compartment syndrome. In addition, intensive care unit needs were higher. Multivariate analysis confirmed that age, injury severity, shock, high potassium, uric acid, and lactate levels on admission, development of AKI, compartment syndrome, and intensive care unit admission were significant predictors of mortality. Better disaster preparedness and improved health care infrastructure could be potential explanations for improved in-hospital mortality in the current era, as compared to previous earthquakes., (Copyright © 2024 International Society of Nephrology. Published by Elsevier Inc. All rights reserved.)
- Published
- 2024
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44. Temporal tendency, seasonality and relationship with climatic factors of Crimean-Congo Hemorrhagic Fever cases (East of Turkey: 2012-2021).
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Yılmaz S, İba Yilmaz S, Alay H, Koşan Z, and Eren Z
- Abstract
Crimean-Congo Hemorrhagic Fever continues to be an important public health problem by expanding its borders. To evaluate the temporal trend, seasonality, and relationship with the climatic factors of Crimean-Congo Hemorrhagic Fever. Study data included cases treated in two different tertiary healthcare institutions between 2012 and 2021. The demographic characteristics of the cases and the dates of admission to the hospital were determined, and they were matched with the average of the measurements (temperature, cumulative precipitation, relative humidity, wind speed) of two different meteorology stations in the study area. By calculating the crude incidence rates, the trend in years was investigated. Estimates were created by removing the incidence rates, seasonality, and trend components using the additive decomposition technique. The temporal relationship between incidence rates and climatic factors was evaluated with the help of the Autoregressive Distributed Lag Bound Test. Toda Yamamoto test was used for causality verification. The mean age of the cases (n = 974) included in the study was 47.6 ± 17.7 years, and the majority (57.3%) were in the group above 45 years of age. 56.6% of the cases were male and there was a male predominance in all age groups. Incidence rates ranged from 5.5 to 23.1/100,000 over the ten-year period and there was a significant upward trend (R
2 = 0.691, p = 0.003). Cases of Crimean-Congo Hemorrhagic Fever that started in March, peaked in July and ended in October, showed a clear seasonality. A cointegration relationship was observed between case incidence rates and air temperature, cumulative precipitation, and relative humidity ( p < 0.05 for all). Climatic factors can only indirectly affect the occurrence of Crimean-Congo Hemorrhagic Fever cases. However, climatic conditions that become progressively more favorable for vector ticks lead to the spread of the disease. The control measures to be taken should be prepared by considering the changing climatic conditions and prioritizing the risk groups. There is a need for information and awareness-raising studies about climate change and the growing dangers associated with it, also outside of endemic regions., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2023 The Authors.)- Published
- 2023
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45. Characteristics and outcomes of acute kidney injury in hospitalized COVID-19 patients: A multicenter study by the Turkish society of nephrology.
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Arikan H, Ozturk S, Tokgoz B, Dursun B, Seyahi N, Trabulus S, Islam M, Ayar Y, Gorgulu N, Karadag S, Gok M, Akcali E, Bora F, Aydın Z, Altun E, Ahbap E, Polat M, Soypacacı Z, Oguz EG, Koyuncu S, Colak H, Sahin İ, Dolarslan ME, Helvacı O, Kurultak I, Eren Z, Dheir H, Ogutmen MB, Taymez DG, Genek DG, Ozkurt S, Bakır EA, Yuksel E, Sahutoglu T, Oto OA, Boz G, Sengul E, Kara E, and Tuglular S
- Subjects
- Acute Kidney Injury etiology, Aged, COVID-19 complications, COVID-19 mortality, COVID-19 virology, Comorbidity, Female, Hospital Mortality, Hospitalization, Humans, Intensive Care Units, L-Lactate Dehydrogenase blood, Male, Middle Aged, Proportional Hazards Models, Retrospective Studies, Risk Factors, SARS-CoV-2 isolation & purification, Severity of Illness Index, Sex Factors, Turkey, Acute Kidney Injury pathology, COVID-19 pathology
- Abstract
Background: Acute kidney injury (AKI) is common in coronavirus disease-2019 (COVID-19) and the severity of AKI is linked to adverse outcomes. In this study, we investigated the factors associated with in-hospital outcomes among hospitalized patients with COVID-19 and AKI., Methods: In this multicenter retrospective observational study, we evaluated the characteristics and in-hospital renal and patient outcomes of 578 patients with confirmed COVID-19 and AKI. Data were collected from 34 hospitals in Turkey from March 11 to June 30, 2020. AKI definition and staging were based on the Kidney Disease Improving Global Outcomes criteria. Patients with end-stage kidney disease or with a kidney transplant were excluded. Renal outcomes were identified only in discharged patients., Results: The median age of the patients was 69 years, and 60.9% were males. The most frequent comorbid conditions were hypertension (70.5%), diabetes mellitus (43.8%), and chronic kidney disease (CKD) (37.6%). The proportions of AKI stages 1, 2, and 3 were 54.0%, 24.7%, and 21.3%, respectively. 291 patients (50.3%) were admitted to the intensive care unit. Renal improvement was complete in 81.7% and partial in 17.2% of the patients who were discharged. Renal outcomes were worse in patients with AKI stage 3 or baseline CKD. The overall in-hospital mortality in patients with AKI was 38.9%. In-hospital mortality rate was not different in patients with preexisting non-dialysis CKD compared to patients without CKD (34.4 versus 34.0%, p = 0.924). By multivariate Cox regression analysis, age (hazard ratio [HR] [95% confidence interval (95%CI)]: 1.01 [1.0-1.03], p = 0.035], male gender (HR [95%CI]: 1.47 [1.04-2.09], p = 0.029), diabetes mellitus (HR [95%CI]: 1.51 [1.06-2.17], p = 0.022) and cerebrovascular disease (HR [95%CI]: 1.82 [1.08-3.07], p = 0.023), serum lactate dehydrogenase (greater than two-fold increase) (HR [95%CI]: 1.55 [1.05-2.30], p = 0.027) and AKI stage 2 (HR [95%CI]: 1.98 [1.25-3.14], p = 0.003) and stage 3 (HR [95%CI]: 2.25 [1.44-3.51], p = 0.0001) were independent predictors of in-hospital mortality., Conclusions: Advanced-stage AKI is associated with extremely high mortality among hospitalized COVID-19 patients. Age, male gender, comorbidities, which are risk factors for mortality in patients with COVID-19 in the general population, are also related to in-hospital mortality in patients with AKI. However, preexisting non-dialysis CKD did not increase in-hospital mortality rate among AKI patients. Renal problems continue in a significant portion of the patients who were discharged., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2021
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46. Renal Infarction in a Young Man
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Eren Z and Koyuncu H
- Subjects
- Abdominal Pain etiology, Adult, Angiography methods, Humans, Infarction diagnostic imaging, Kidney diagnostic imaging, Kidney physiopathology, Male, Ultrasonography methods, Infarction diagnosis, Kidney injuries
- Published
- 2019
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47. Stereological examination of curcumin's effects on hippocampal damage caused by the anti-epileptic drugs phenobarbital and valproic acid in the developing rat brain.
- Author
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Demirel Yılmaz B, Eren B, Sağır D, Eren Z, and Başardı Gökçe A
- Subjects
- Animals, Female, Hippocampus cytology, Male, Microscopy, Rats, Rats, Wistar, Anticonvulsants pharmacology, Curcumin pharmacology, Hippocampus drug effects, Hippocampus metabolism, Phenobarbital pharmacology, Valproic Acid pharmacology
- Abstract
The anti-epileptic drugs phenobarbital and valproic acid have an extremely strong negative effect on cognitive processes such as learning and memory in the developing brain. We examined whether or not curcumin has protective effects on neuronal injury caused by these drugs in the developing rat brain. Young male Wistar rats were studied in two groups, a 7 days old and a 14 days old group (35 rats in each). Both groups were then divided into 7 sub-groups as the control, curcumin, dimethylsulfoxide, phenobarbital, valproic acid, phenobarbital + curcumin, and valproic acid + curcumin groups (n = 5 in each group). At 24 h after the intraperitoneal injection of the compounds, the rats were sacrificed, and the hippocampal tissue was subjected to stereological analysis with the optical fractionation method. Total numbers of neurons in the hippocampus of the 7 days old and 14 days old rats were calculated. It was found that treatment with phenobarbital resulted in a loss of 43% of the neurons, and valproic acid induced a loss of 57% of the neurons in the 7 days old rats. Curcumin prevented this loss significantly with only 19% in the phenobarbital group and 41% in the valproic acid group. In the 14 days old rat groups, phenobarbital was found to reduce the number of neurons by 30%, and valproic acid reduced it by 38%. Curcumin treatment limited neuronal loss to 3% in the phenobarbital + curcumin group and 10% in the valproic acid + curcumin group. These data strongly indicate that curcumin is a protective agent and prevents hippocampal neuronal damage induced by phenobarbital and valproic acid treatment., (Copyright © 2019 Elsevier GmbH. All rights reserved.)
- Published
- 2019
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48. Role of erythropoietin and its receptor in the development of endometriosis in rats
- Author
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Günal MY, Ozansoy M, Kılıç Ü, Keskin İ, Özdemir EM, Aslan İ, Eren Z, Ersavaş C, and Kılıç E
- Abstract
Objective: Besides its hematopoietic function, erythropoietin (EPO) may protect tissues from degenerative disorders. As such, EPO and its receptors were revealed in nonhematopoietic cells, including stromal and endometrial epithelial cells. However, the role of EPO in endometrial disorders is still unknown. Here, we aimed to examine the role of EPO and its receptor activation in the development of endometriosis in rats., Material and Methods: Animals were treated with EPO, darbepoietin (the synthetic form of EPO) or EPO’s receptor activator, methoxy polyethylene glycol-epoetin beta (MIRCERA), after development of endometriosis. Endometriosis was induced by estrogen-administration following surgical attachment of endometrial surface on the inner abdominal wall. Treatments were started 3 weeks after induction of endometriosis and continued for the following 3 weeks. For the analysis of recurrence of endometriosis, additional analyses were conducted 3 weeks after cessation of treatments., Results: As compared with vehicle-treated animals, lesion size was reduced significantly and recurrence of endometriosis was not observed in all treatment groups. Histopathologic examination revealed that EPO and darbepoietin were more effective than MIRCERA- and vehicle-treated animals., Conclusion: Here we provide evidence that EPO is a promising candidate for the treatment of endometriosis. Our histopathologic results in particular indicate that EPO is more effective than its receptor activator MIRCERA in the development endometriosis.
- Published
- 2019
- Full Text
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49. Lowering dialysate sodium improves systemic oxidative stress in maintenance hemodialysis patients.
- Author
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Macunluoglu B, Gumrukcuoglu HA, Atakan A, Demir H, Alp HH, Akyol A, Akdag S, Yavuz A, Eren Z, Keskin S, and Ari E
- Subjects
- Adult, Endothelium, Vascular physiopathology, Female, Humans, Male, Middle Aged, Monitoring, Physiologic methods, Statistics as Topic, Blood Pressure drug effects, Endothelium, Vascular drug effects, Hemodialysis Solutions pharmacology, Kidney Failure, Chronic diagnosis, Kidney Failure, Chronic metabolism, Kidney Failure, Chronic therapy, Oxidative Stress drug effects, Renal Dialysis adverse effects, Renal Dialysis methods, Sodium blood, Sodium pharmacology
- Abstract
Purpose: The purpose of the current prospective study was to evaluate the effects of low sodium dialysate on oxidative stress parameters, blood pressure (BP) and endothelial dysfunction in maintenance hemodialysis (HD) patients., Methods: After baseline measurements were taken, the dialysate sodium concentration was reduced from 140 to 137 mEq/L. Oxidative stress parameters and flow-mediated dilatation (FMD %) were measured before and after 6 months of HD with low sodium dialysate. Interdialytic weight gain (IDWG) and pre- and post-dialysis BP were monitored during the study., Results: A total of 52 patients were enrolled and 41 patients completed the study. There was a significant reduction in systolic blood pressure at the end of the study [130.00 (90.00-190.00) vs. 120.00 (90.00-150.00), p < 0.001]. Similarly, there were significant improvements in IDWG [2670.00 (1670.00-4300.00) vs. 1986.00 (1099.00-3998.00), p < 0.001] and FMD % [7.26 (4.55-8.56) vs. 9.56 (6.55-12.05), p < 0.001]. Serum MDA levels (p < 0.001) were significantly decreased; serum SOD (p < 0.001) and GPx (p < 0.001) activities were significantly increased after low sodium HD compared to standard sodium HD., Conclusion: Our data seem to suggest a potential role of 137 mEq/L sodium dialysate for improving hemodynamic status, endothelial function and reducing oxidative stress than 140 mEq/L sodium dialysate in maintenance HD patients.
- Published
- 2016
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50. Pleiotropic and Renoprotective Effects of Erythropoietin Beta on Experimental Diabetic Nephropathy Model.
- Author
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Eren Z, Günal MY, Arı E, Çoban J, Çakalağaoğlu F, Çağlayan B, Beker MÇ, Akdeniz T, Yanıkkaya G, Kılıç E, and Kantarcı G
- Subjects
- Animals, Cytokines blood, Diabetic Nephropathies enzymology, Diabetic Nephropathies metabolism, Glutathione metabolism, Inflammation Mediators blood, Male, Oxidative Stress, Rats, Rats, Sprague-Dawley, Superoxide Dismutase metabolism, Diabetic Nephropathies prevention & control, Disease Models, Animal, Erythropoietin therapeutic use
- Abstract
Background: This study aimed at investigating the possible protective effect of erythropoietin beta on experimental diabetic nephropathy (DN) model in rats., Methods: Sprague Dawley rats (n = 32) were allocated into 4 equal groups of 8 each, the control (Group C), diabetes (Group D), erythropoietin beta (Group E), and erythropoietin beta treated DN (Group E + D) groups. Streptozocin (65 mg/kg) was used to induce diabetes in 10-week old rats. Erythropoietin beta was given intraperitoneally at a dose of 500 IU/kg/3 days of a week for 12 weeks. Renal function parameters, intrarenal levels and activities of oxidative stress biomarkers, serum inflammatory parameters and kidney histology were determined., Results: Group E + D had lower mean albumin-to-creatinine ratio (p < 0.001) as well as higher creatinine clearance (p = 0.035) than the diabetic rats (Group D). Intrarenal malondialdehyde levels were significantly lower (p = 0.004); glutathione (GSH) levels (p = 0.003), GSH peroxidase (p = 0.004) and superoxide dismutase (p < 0.005) activities of renal tissue were significantly higher in Group E + D than in Group D. The mean serum levels of interleukin-4 (p < 0.005), interleukin 1 beta (p = 0.012), interferon gamma (p = 0.018) and tumor necrosis factor alpha (p < 0.005) were significantly lower; serum levels of monocyte chemoattractant protein 1 (p = 0.018) was significantly higher in Group E + D when compared to Group D. The mean scores of tubulointerstitial inflammation (p = 0.004), tubular injury (p = 0.013) and interstitial fibrosis (p = 0.003) were also lower in Group E + D when compared to Group D., Conclusion: Our data seem to suggest a potential role of erythropoietin beta for reducing the progression of DN in an experimental rat model. This protective effect is, in part, attributable to the suppression of the inflammatory response and oxidative damage., (© 2016 S. Karger AG, Basel.)
- Published
- 2016
- Full Text
- View/download PDF
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