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Güner G, Erbaş O. Candesartan protects from cisplatin-induced kidney damage via the GDF-15 pathway. Eur Rev Med Pharmacol Sci 2024; 28:1103-1110. [PMID: 38375716 DOI: 10.26355/eurrev_202402_35347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
OBJECTIVE The aim of this study was to explore the protective effect of candesartan against cisplatin-induced kidney damage, with a specific focus on the growth differentiation factor 15 (GDF-15) pathway. MATERIALS AND METHODS 24 adult female Wistar rats, with a weight range of 200-210 grams, were enrolled in the study. Eight rats were included as a normal control group and did not receive any medication. 16 rats were administered cisplatin at a dosage of 2.5 mg/kg/day twice a week for 4 weeks (total dose 20 mg/kg). Then, they were randomly divided into two groups and treated with 1 ml/kg/day tap water or 8 mg/kg/day candesartan via oral gavage daily for 4 weeks. At the end of the treatment period, animals were sacrificed, and their kidneys were assessed histologically. In addition, plasma malondialdehyde (MDA), tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), creatinine, and GDF-15 levels were assessed. RESULTS Treatment with candesartan resulted in a significant rise in serum GDF-15 levels and a significant reduction in levels of serum MDA, TNF-α, IL-6, and creatinine compared to the cisplatin and saline group. Candesartan treatment effectively protected the kidney injury, and histopathological examinations of the kidneys confirmed these results. CONCLUSIONS This study demonstrates that candesartan alleviates cisplatin-induced renal toxicity by further increasing GDF-15, downregulating inflammatory markers, and reducing oxidative stress.
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Affiliation(s)
- G Güner
- Department of Medical Oncology, Medical Point Hospital, University of Economy, Izmir, Turkey.
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Efil S, Güner G, Guven D, Çelikten B, Çelebiyev E, Taban H, Akyol A, Kilickap S, Yalcin Ş, Dizdar Ö. 456P Prognostic and predictive value of tumor-infiltrating lymphocytes in combination with systemic inflammatory markers in colon cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Ertugrul C, Acar B, Altun Z, Güner G. M074 SERUM AND PERITONEAL FLUID LEVELS OF BETA-FIBROBLAST GROWTH FACTOR AND SEVERE OF ENDOMETRIOSIS. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)61269-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ertugrul C, Altun Z, Acar B, Güner G. M073 SERUM AND PERITONEAL FLUID LEVELS OF ENDOGLIN IN WOMEN WITH BENIGN OVARIAN CYSTS: COMPARISON OF ENDOMETRIOTIC AND NON-ENDOMETRIOTIC BENIGN OVARIAN CYSTS. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)61268-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Cavuşoğlu AC, Saydam S, Alakavuklar M, Canda T, Sevinç A, Kiliç Y, Harmancioğlu O, Koçdor MA, Kinay M, Alanyali H, Görken I, Balci P, Demirkan B, Sakizli M, Güner G. A pilot study for human tumor/DNA banking: returned more questions than answers. Med Oncol 2008; 25:471-3. [PMID: 18392956 DOI: 10.1007/s12032-008-9060-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2007] [Accepted: 06/22/2007] [Indexed: 12/01/2022]
Abstract
A pilot study was performed for setting up the Dokuz Eylül University Breast Tumor DNA Bank (DEUBTB) to facilitate the sharing of tumor DNA/RNA samples and related data from cases collected by collaborators specializing in the breast cancer diseases between 2004 and 2006. The pilot study aimed to provide answers for certain questions on: (1) ethical concerns (informing the volunteer for donating specimen, anonymizing the sample information, procedure on sample request), (2) obtaining and processing samples (technical issues, flowchart), (3) storing samples and their products (storing forms and conditions), (4) clinical database (which clinical data to store), (5) management organization (quality and quantity of personnel, flowchart for management relations), (6) financial issues (establishment and maintenance costs). When the bank had 64 samples, even though it is quite ready to supply samples for a research project, it revealed many questions on details that may be answered in more than one way, pointing that all biobanks need to be controlled by a higher degree of management party which develops and offers quality standards for these establishments.
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Affiliation(s)
- A Celebiler Cavuşoğlu
- Dokuz Eylül University Faculty of Medicine and Institute of Oncology, Izmir, Turkey.
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Nakoman C, Resmi H, Ay O, Acikel U, Atabey N, Güner G. Effects of basic fibroblast factor (bFGF) on MMP-2, TIMP-2, and type-I collagen levels in human lung carcinoma fibroblasts. Biochimie 2005; 87:343-51. [PMID: 15781321 DOI: 10.1016/j.biochi.2004.11.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2004] [Accepted: 11/23/2004] [Indexed: 11/25/2022]
Abstract
Matrix metalloproteinases (MMP's) and tissue inhibitors of metalloproteinases (TIMP's) possess a preponderant role in the metabolism of the major extracellular matrix protein, collagen, and are thought to be important in the mechanism of tumor invasion. Lung cancer occupies the first position in mortality and the second position in incidence, among all cancers. In the present investigation, we studied the effect of basic fibroblast growth factor (bFGF) on collagen, matrix metalloproteinase-2 (MMP-2), and tissue metalloproteinase inhibitor-2 (TIMP-2) levels in normal and carcinoma lung tissue fibroblast cultures. MMP-2 was selected because of its high specificity in the degradation of type IV collagen, major component of the basal membrane. The effect of bFGF on MMP-2, TIMP-2, total collagen, and type I collagen levels of normal and carcinoma lung fibroblast cultures was investigated at 0, 10, and 100 ng/ml. Statistical analysis was carried out using the Mann-Whitney-U test and possible correlations were searched using the Spearman correlation analysis method. MMP-2, TIMP-2, total collagen, and type-1 collagen levels based on cell counts (10(3) cells) showed no statistically significant differences between the carcinoma and normal fibroblast cultures. However, positive correlations were found between MMP-2 and TIMP-2 in normal (P = 0.016) and carcinoma (P = 0.001) tissue fibroblast cultures. Positive correlations were also found between total collagen and TIMP-2 levels in normal and carcinoma tissue fibroblast cultures (P = 0.002 and P = 0.032). Total collagen and TIMP-2 levels also showed positive and strong correlations in all cultures except in 100 ng/ml bFGF concentrations. In addition, type I collagen and MMP-2 levels showed positive significant correlations only in normal and carcinoma control cultures, while type I collagen and TIMP-2 levels showed positive correlations in all cultures except carcinoma fibroblasts at 100 ng/ml bFGF. It may be concluded that bFGF does not affect MMP-2, TIMP-2, total collagen, and type-1 collagen levels in fibroblast cultures grown from human carcinoma and normal lung tissues. However, bFGF was noted, in vitro, to disturb the equilibrium which normally exists between the four parameters, both in normal and carcinoma tissue fibroblasts.
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Affiliation(s)
- C Nakoman
- Department of Biochemistry, Dokuz Eylül University School of Medicine, Inciralti 35340, Izmir, Turkey
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Abstract
Atherosclerosis in childhood has a slowly progressive course and its clinical features usually become prominent in middle ages. Hypercholesterolemia is one of the major risk factors for the development of atherosclerosis. A clear correlation exists between hypercholesterolemia in childhood and atherosclerotic lesions extending into adulthood.In this study, we evaluated the effect of slow release theophylline (SRT) treatment on plasma lipid profile and assessed the risk for atherosclerotic coronary heart disease in children with bronchial asthma. Group 1 consisted of 15 children with a mean age of 10.8 3.19 years who received SRT for bronchial asthma for a mean period of 9.13 2.17 months. Group 2 was composed of 15 children with a mean age of 11.40 3.78 years and followed up for bronchial asthma, who received no SRT treatment. Group 3 comprised 15 children with a mean age of 9.00 3.76 years and no history of asthma or wheezing. In all patients lipid profiles were assessed by measuring levels of plasma triglyceride, total cholesterol, high density lipoprotein cholesterol (HDL-C), low density lipoprotein cholesterol (LDL-C) apolipoprotein A (Apo-A) and apolipoprotein B (Apo-B). In group 1, the mean total cholesterol level was 175.53 24.36 mg/dl, LDL-C level was 91.00 24.07 mg/dl and Apo-B level was 87.27 12.74 mg/dl after SRT treatment. In group 1, group 2 (control group with asthma) and group 3 (the non-asthmatic control group), the mean plasma lipid level after SRT treatment was significantly higher than that before SRT treatment. In conclusion, long-term SRT treatment in children with bronchial asthma may alter lipid profile and may increase the risk for developing atherosclerotic coronary heart disease.
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Affiliation(s)
- N Uzuner
- Dokuz Eylül University Medical Faculty of Department of Pediatrics and Biochemistry. Izmir. Turkey
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Abstract
The objective of this study was to elucidate the glycation and oxidation processes in plasma and erythrocyte membrane proteins as well as the major erythrocyte cytoskeletal protein, spectrin, using a short-term experimental rabbit diabetes model. Diabetes was induced with a single-dose alloxan injection. Spectrin was purified from erythrocyte ghosts with selective solubilization followed by gel filtration chromatography techniques, and tested for purity using sodium dodecyl sulfate-poly-acrylamide gel electrophoresis. Glycation in plasma proteins was measured as fructosamine using the nitroblue tetrazolium method, and in erythrocyte membrane and purified spectrin, as ketoamine equivalents, by the hydrazine/phenylhydrazine method. Protein oxidation in plasma, erythrocyte membrane proteins, and purified spectrin was evaluated in terms of sulfhydryl oxidation, based on cis-dichlorodiammine platinum (II) binding. Carbonyl formation was also measured in plasma and membrane proteins. Sulfhydryl oxidation, carbonyl groups and glycated protein levels showed statistically significant differences between the diabetic and control groups for both the plasma and the erythrocyte membrane proteins. The cis-dichlorodiammine platinum (II) binding was significantly different in diabetic rabbit erythrocyte spectrin, while glycation was not significantly different for this protein. Our data clearly demonstrate that both protein glycation and oxidation are biochemical alterations occurring in diabetes, even of short duration.
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Affiliation(s)
- H Resmi
- Department of Biochemistry, Dokuz Eylül University Medical School, Izmir, Turkey
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Buduneli N, Atilla G, Güner G, Oktay G. Biochemical analysis of total collagen content and collagen types I, III, IV, V and VI in gingiva of various periodontitis categories. J Int Acad Periodontol 2001; 3:1-6. [PMID: 12666971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Collagen is one of the chief components of the extracellular matrix of gingival connective tissue, where five different types have been identified to date. The molecular mechanism of collagen loss in periodontitis still needs to be explored. In the present study total collagen content was investigated in gingival connective tissue of adult periodontitis (AP) as well as early onset periodontitis patients (EOP) and clinically healthy subjects. Furthermore, collagen type I, III, IV, V andVI content was evaluated in gingival biopsies obtained from periodontitis patients. There was a statistically significant difference between AP (25.1 +/- 8.1 microg/mg) and EOP (15.6 +/- 4.0microg/mg) groups with regard to the total collagen content (P < 0.05). In the clinically healthy control group the total collagen content was 20.7 +/- 4.6microg/mg. Moreover, the distribution of collagen types exhibited variations in pooled homogenates of each periodontitis group. The total collagen loss seemed to be greater in the EOP patients than in the AP patients. When the ratio of fibril forming collagens to nonfibrillar collagens was evaluated, it seems to be decreased in AP patients in comparison to EOP patients. The findings of the present study suggest that different collagen types present in various periodontitis categories may be related with diverse pathogenic mechanisms acting in these diseases.
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Affiliation(s)
- N Buduneli
- Ege University, Faculty of Dentistry, Department of Periodontology, Izmir, Turkey.
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Ozden A, Aybek Z, Saydam N, Calli N, Saydam O, Düzcan E, Güner G. Cytoprotective effect of trimetazidine on 75 min warm renal ischemia-reperfusion injury in rats. Eur Surg Res 2000; 30:227-34. [PMID: 9704748 DOI: 10.1159/000008581] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In this experimental study, we evaluated the effect of trimetazidine (TMZ) on renal ischemia-reperfusion (IR) injury in Sprague-Dawley rats. Renal IR was achieved by a 75-min clamping of the left renal pedicle and subsequent 24 h reperfusion, after right nephrectomy was performed. The rats were randomly divided into three groups: group 1 (sham-operated: no IR injury), group 2 (ischemic control: saline treatment), and group 3 (3 mg/kg TMZ before ischemia). After 24 h of reperfusion, blood samples and renal tissue samples were taken to measure the levels of creatinine, tissue malondialdehyde (MDA), and glutathione peroxidase (GSH-Px) activity. Histopathological changes were evaluated. In addition, the 7-day survival rates in each group were evaluated. We found significant increases in the levels of creatinine and tissue MDA, severe acute tubular necrosis, and a significant decrease in the activity of the GSH-Px in group 2. There were significant decreases in the levels of creatinine and tissue MDA, mild acute tubular necrosis, and a significant increase in activity of the GSH-Px in group 3 when compared with the control group (p <0.05). Statistically significant differences (p <0.05) in survival were noted between the ischemic control and sham-operated and TMZ groups. We have concluded that TMZ is able to protect the kidney from warm IR injury.
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Affiliation(s)
- A Ozden
- Department of Surgery, Faculty of Medicine, Pamukkale University, Denizli, Turkey
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Işlekel S, Işlekel H, Güner G, Ozdamar N. Alterations in superoxide dismutase, glutathione peroxidase and catalase activities in experimental cerebral ischemia-reperfusion. Res Exp Med (Berl) 1999; 199:167-76. [PMID: 10639700 DOI: 10.1007/s004330050121] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Free radicals are thought to be the most important cause of the reperfusion injury subsequent to ischemia. The antioxidant status of the tissue affected by ischemia-reperfusion is of great importance for the primary endogenous defense against the free radical induced injury. This investigation was performed to evaluate the antioxidant enzyme capacity of the brain tissue in the ischemia-reperfusion period using an experimental global moderate (penumbral) ischemia model on rat brains. Experiments were performed on 45 male Sprague Dawley rats. Ischemia was induced by bilateral vertebral arteries cauterization and temporary bilateral carotid arteries occlusion and sustained for 10 minutes. At the end of ischemia (0 min reperfusion) and various reperfusion periods (20 min, 60 min, 240 min), rats were decapitated and brains were frozen in liquid nitrogen. Changes in the intracellular antioxidant enzyme (superoxide dismutase, glutathione peroxidase and catalase) activities were assessed in the rat brain tissues, by spectrophotometric methods. In all moderate ischemia-reperfusion groups, superoxide dismutase activities were found to have decreased significantly compared to the sham operated controls (P < 0.05). During ischemia superoxide dismutase activity was lowered to 31% of that of the control group. The decreases were more significant in reperfusion groups, particularly in 60 min reperfusion (40%). Relatively smaller but still significant diminution was observed in glutathione peroxidase activities (P < 0.05). The ratio of diminution was striking in 20 min and 60 min reperfusion groups with 26% of the sham operated rats. Conversely, moderate ischemia-reperfusion caused significant increase in catalase activities (P < 0.05). The increment was 63% of the preischemic level with 10 min of moderate ischemia. In conclusion, activities of the major antioxidant enzymes were changed significantly in moderate brain ischemia-reperfusion. These results suggest that the disturbance in oxidant-antioxidant balance might play a part in rendering the tissue more vulnerable to free radical induced injuries.
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Affiliation(s)
- S Işlekel
- Department of Neurosurgery, Ege University Faculty of Medicine, Bornova, Izmir, Turkey.
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Işlekel H, Işlekel S, Güner G, Ozdamar N. Evaluation of lipid peroxidation, cathepsin L and acid phosphatase activities in experimental brain ischemia-reperfusion. Brain Res 1999; 843:18-24. [PMID: 10528106 DOI: 10.1016/s0006-8993(99)01845-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
This investigation was conducted in rat brain tissues to elucidate the free radical induced cellular and subcellular membrane injuries in two different depth of global ischemia. Global moderate (penumbral) ischemia was performed on rat brains by bilateral vertebral arteries cauterization and temporary occlusion of the bilateral carotid arteries. Global severe ischemia was produced by a neck tourniquet in addition to four vessel occlusion. Somatosensory evoked potentials (SSEPs) were used as a feed back parameter to monitor electrophysiologically the ischemia. At the end of ischemic insult (0 min reperfusion) or various reperfusion periods (20, 60 and 240 min), all rats were decapitated and brains were frozen in liquid nitrogen. The brain tissues were prepared for the determination of cathepsin L (CL) and acid phosphatase (AP) activities in the supernatant (cytosolic) fraction (SF) and the fraction enriched with lysosomes (FEL). Further the level of thiobarbituric acid reactive substances (TBARS) of lipid peroxidation was assessed by the spectrophotometric methods. Severe ischemia-reperfusion was accompanied by a significant increase in TBARS levels and the SF/FEL ratio for CL and AP activities compared to the sham operated group and the concurrent reperfusion groups of moderate ischemia (p<0.05). There were no significant differences between the sham operated and moderate ischemia-reperfusion groups for the same parameters. Our data clearly demonstrate that; in rat brain although severe ischemia-reperfusion causes lipid peroxidation in cellular membranes and redistribution of lysosomal enzymes from lysosomes to cytoplasm due to lysosomal membrane injury, there are no changes in lysosomal membrane stability in moderate ischemia-reperfusion.
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Affiliation(s)
- H Işlekel
- Department of Biochemistry, School of Medicine, Dokuz Eylül University, Inciralti 35340, Izmir, Turkey.
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Güner G, Gürer S, Elmali N, Ertem K. Anterior sacroiliac fusion: a new video-assisted endoscopic technique. Surg Laparosc Endosc Percutan Tech 1998; 8:233-6. [PMID: 9649051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We present a case of sacroiliac fusion performed for an intraarticular osteochondroma of the sacroiliac joint, which was the cause of severe pain and disability. Excision of the lesion and sacroiliac fusion were successfully performed by utilizing minimally invasive surgical techniques. Although the application of this technique requires a dedicated and highly experienced team, the encouraging result of our first case, with minimal morbidity and disability due to the operation, induces us to recommend this technique in sacroiliac fusion, especially when fusion is combined with additional procedures such as drainage, biopsy, or excision.
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Affiliation(s)
- G Güner
- Department of Orthopedics, Ynönü University Faculty of Medicine, Malatya, Turkey
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Cömlekçi A, Biberoglu S, Kozan O, Bahçeci O, Ergene O, Nazli C, Kinay O, Güner G. Correlation between serum lipoprotein(a) and angiographic coronary artery disease in non-insulin-dependent diabetes mellitus. J Intern Med 1997; 242:449-54. [PMID: 9437405 DOI: 10.1111/j.1365-2796.1997.tb00017.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVES To examine the impact of diabetic state on the concentrations of lipoprotein(a) [Lp(a)] in patients with non-insulin-dependent diabetes mellitus (NIDDM) and the correlation between angiographic coronary artery disease (CAD) and serum Lp(a) concentrations in NIDDM. DESIGN In this cross-sectional study of 26 patients with NIDDM and 19 nondiabetic sex- and age-matched patients who underwent coronary angiography. CAD was assessed visually using coronary artery score (CAS), and plasma Lp(a) was measured by an enzyme-linked immunosorbent assay. SETTING The study was performed in an internal medicine clinic at a university hospital. SUBJECTS Twenty-six age- and sex-matched patients with NIDDM and 19 control patients without diabetes. RESULTS There was no significant difference between the Lp(a) concentrations of patients with NIDDM and nondiabetic subjects (P > 0.05). When patients with NIDDM were stratified by absence or presence of CAD, patients with CAD had higher levels of Lp(a) (P < 0.05). However, there was no significant correlation between the concentrations of Lp(a) and CAS (P > 0.05). CONCLUSIONS Diabetic state does not have any impact on Lp(a) concentrations. Lp(a) excess seems to be atherogenic in patients with NIDDM as shown in nondiabetic patients in previous studies. Although diabetic patients with CAD have higher Lp(a) concentrations than the diabetic patients without CAD, Lp(a) levels were not correlated with CAS.
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Affiliation(s)
- A Cömlekçi
- Department of Internal Medicine, Dokuz Eylül University, Medical School, Inciralti, Izmir, Turkey
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Saydam N, Kirb A, Demir Ö, Hazan E, Oto Ö, Saydam O, Güner G. Determination of glutathione, glutathione reductase, glutathione peroxidase and glutathione S-transferase levels in human lung cancer tissues. Cancer Lett 1997; 119:13-9. [DOI: 10.1016/s0304-3835(97)00245-0] [Citation(s) in RCA: 94] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Açikel Ü, Hazan E, Sariosmanoglu N, Çatalyürek &H, Silistreli E, Güner G, Saydam N, Tunçok Y, Güven H, Karabay Ö, Oto Ö. Nisoldipine Cardioplegia in the Isolated Rabbit Heart. J Cardiovasc Pharmacol Ther 1997; 2:285-290. [PMID: 10684469 DOI: 10.1177/107424849700200406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND: The metabolic and hemodynamic effects of nisoldipine supplementation in cardioplegia after ischemic injury were investigated in 13 isolated rabbit hearts. Group 1 consisted of 6 hearts, which received St. Thomas II cardioplegic solution. In group 2, nisoldipine was added to the cardioplegic solution at a concentration of 0.1 mg/kg in 7 hearts. METHODS: The explanted hearts were suspended from Langendorff apparatus and were perfused with Krebs-Henseleit solution. Left ventricular pressure, heart rate, malondialdehyde, glutathione peroxidase, glutathione reductase, reduced glutathione, oxidized glutathione, creatine kinase MB, (CK-MB), aspartate transaminase, and lactate dehydrogenase (LDH) were measured before and after 60 minutes of ischemia. Peak generated pressure after ischemia was significantly higher in group 2 versus group 1 while end-diastolic pressure was significantly lower in group 2 after ischemic arrest (P <.05). RESULTS: Malondialdehyde levels were lower in group 2 (P <.05). Glutathione peroxidase and glutathione reductase levels were significantly higher in group 2 (P <.05). The only enzymatic significant difference was observed between the preischemic and postischemic levels of aspartate transaminase in group 2 (P <.05). CONCLUSIONS: These findings show beneficial effects of nisoldipine cardioplegia, although its use as a cardioplegic additive is not yet possible. We believe, however, the effects of oral nisoldipine before cardiac surgery can be studied in a clinical setting.
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Affiliation(s)
- Ü Açikel
- Department of Thoracic and Cardiovascular Surgery, Dokuz Eylül University, Inciralti, Izmir, Turkey
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Abstract
This investigation was effected to determine the levels of the two antioxidant enzymes, superoxide dismutase (SOD) (EC 1.15.1.1) and catalase (CAT) (EC 1.11.1.6) in lung cancerous tissues and to compare with normal lung tissue in order to evaluate the antioxidant status in lung cancer. Fifteen lung carcinoma tissue samples and the normal counterparts from the same cases were homogenized and the cytosols obtained by ultracentrifugation (100,000 x g). SOD was assayed using a modification of the indirect nitroblue tetrazolium assay method, while CAT was measured by a spectrophotometric method. The data obtained are as follows: 1.42 +/- 0.24 U/mg protein (means +/- SEM) of SOD in lung cancer and 3.13 +/- 0.51 U/mg protein in normal lung tissue and 33.53 +/- 6.09 U/mg protein of CAT in lung cancer and 71.33 +/- 14.38 in normal lung tissue. The differences were found to be significant at the level of P < 0.01 for both enzymes. These low levels of the antioxidant enzymes in lung cancerous tissues can lead to elevated levels of reactive oxygen metabolites, resulting in damage to the key subcellular structures such as DNA, cell membranes, and other vital cellular components.
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Affiliation(s)
- G Güner
- Department of Biochemistry, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey
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Yenisey C, Yenice S, Güner G, Güner S. Evaluation of tumor-associated antigens and total sialic acid levels in effusions of malignant and benign origin. Biochem Soc Trans 1996; 24:301S. [PMID: 8736959 DOI: 10.1042/bst024301s] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- C Yenisey
- Department of Biochemistry, Adnan Menderes University, Faculty of Medicine, Aydin, Turkey
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Yenisey C, Güner G. Serum MCA, CA 125 and CA 19.9 determination in primary breast cancer. Biochem Soc Trans 1996; 24:302S. [PMID: 8736960 DOI: 10.1042/bst024302s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- C Yenisey
- Department of Biochemistry, Adnan Menderes University, Faculty of Medicine, Aydin, Turkey
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Affiliation(s)
- C Yenisey
- Department of Biochemistry, Adnan Menderes University, Faculty of Medicine, Turkey
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Abstract
We present a new technique for arthroscopically assisted treatment of tibial plateau fracture. This is a modification of previously described reduction and grafting techniques. We performed a core graft under the depressed fragment and used it for reduction. With the aid of anterior cruciate ligament surgery techniques, we aimed to simplify the graft harvesting and reduction for better healing.
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Affiliation(s)
- U S Müezzinoğlu
- Department of Orthopedics and Traumatology, Inönü University, Faculty of Medicine, Malatya, Turkey
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Affiliation(s)
- G Oktay
- Department of Biochemistry, Medical Faculty, Dokuz Eylül University, Turkey
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23
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Oktay G, Güner G, Karlikaya C, Akkoçlu A. Serum levels of neuron-specific enolase, carbohydrate antigen 19-9 and carbohydrate antigen 125 in carcinoma of the lung. Biochem Soc Trans 1995; 23:211S. [PMID: 7672232 DOI: 10.1042/bst023211s] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- G Oktay
- Department of Biochemistry, Faculty of Medicine, Dokuz Eylül University, Izmir/Turkey
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24
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Affiliation(s)
- A Güner
- Department of Neurosurgery, Medical Faculty, First University, Elazig, Turkey
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Abstract
Renal cell carcinoma (RCC) has been shown to secrete several hormones and biologically active substances that influence the host metabolism or induce paraneoplastic syndromes. Observation of anemia in 20% of patients with RCC and the spontaneous recovery of anemia following nephrectomy drew attention to the body iron metabolism. Ferritin was previously proposed as a tumor marker for RCC. In order to determine whether RCC cells actually produce ferritin, we studied ferritin levels in serum from peripheral and renal veins as well as from the tumor tissue and the healthy parenchyma from radical nephrectomy specimens of 22 patients with RCC. Ferritin levels both in sera and cytosols were measured by an enzyme immunoassay method. The mean serum ferritin level from the renal vein was 419.9 +/- 72.4 ng/ml, and it was 157.3 +/- 18.3 ng/ml from the peripheral vein (p < 0.05). Renal vein ferritin correlated with stage and had a significant impact on prognosis (p < 0.05). The mean cytosolic ferritin level of the cancer tissue was 705.6 +/- 56.9 ng/mg cytosol protein, whereas in the normal parenchyma it was 95.9 +/- 10.1 ng/mg cytosol protein. This was also highly significant (p = 1.15 x 10(-13)), suggesting that RCC cells probably express ferritin. As currently there exists no reliable tumor marker for RCC, the value of ferritin as a marker should be investigated further before drawing any clinical conclusions.
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Affiliation(s)
- Z Kirkali
- Department of Urology, Dokuz Eylül University, School of Medicine, Izmir, Turkey
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26
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Djavani M, Yenice S, Kirkali G, Güner G, Sessiz HT. Interstitial collagens isolated from lung of rabbits with alloxan-induced diabetes mellitus. Biochem Soc Trans 1993; 21 ( Pt 3):274S. [PMID: 8224425 DOI: 10.1042/bst021274s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- M Djavani
- Department of Biochemistry, Medical Faculty, Dokuz Eylül University, Izmir, Turkey
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27
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Djavani M, Kirkali G, Yenice S, Güner G, Sessiz HT. Quantitation of type I and III collagen of liver in alloxan-induced diabetic rabbits. Biochem Soc Trans 1993; 21 ( Pt 3):273S. [PMID: 8224424 DOI: 10.1042/bst021273s] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- M Djavani
- Department of Biochemistry, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey
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28
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MESH Headings
- Adenocarcinoma/blood
- Adenocarcinoma/enzymology
- Adenocarcinoma/pathology
- Biomarkers, Tumor/blood
- Carcinoma, Large Cell/blood
- Carcinoma, Large Cell/enzymology
- Carcinoma, Large Cell/pathology
- Carcinoma, Non-Small-Cell Lung/blood
- Carcinoma, Non-Small-Cell Lung/enzymology
- Carcinoma, Non-Small-Cell Lung/pathology
- Carcinoma, Small Cell/blood
- Carcinoma, Small Cell/enzymology
- Carcinoma, Small Cell/pathology
- Carcinoma, Squamous Cell/blood
- Carcinoma, Squamous Cell/enzymology
- Carcinoma, Squamous Cell/pathology
- Humans
- Lung Diseases/blood
- Lung Diseases/enzymology
- Lung Neoplasms/blood
- Lung Neoplasms/enzymology
- Lung Neoplasms/pathology
- Pancreatic Elastase/blood
- Reference Values
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Affiliation(s)
- G Güner
- Department of Biochemistry, Medical Faculty, Dokuz Eylül University, Izmir/Turkey
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29
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Güner G, Oktay G, Akkoçlu A, Karlikaya C. Evaluation of "neuron-specific enolase" as a tumor marker for small cell carcinoma of the lung. Biochem Soc Trans 1993; 21 ( Pt 3):306S. [PMID: 8224452 DOI: 10.1042/bst021306s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- G Güner
- Department of Biochemistry, Medical Faculty, Dokuz Eylül University, Izmir, Turkey
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30
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Baskin Y, Kirkali G, Güner G, Sengör T, Ceryan K. Tissue and plasma fibronectin level in patients with head and neck carcinoma. Biochem Soc Trans 1993; 21 ( Pt 3):308S. [PMID: 8224453 DOI: 10.1042/bst021308s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Y Baskin
- Department of Biochemistry, Medical Faculty, Dokuz Eylül University, Izmir/Turkey
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31
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Kirkali G, Baskin Y, Güner G, Sengör T, Ceryan K. Tissue and plasma elastase and anti-protease (alpha 1 protease inhibitor-alpha 2 macroglobulin) levels in malignancies of head and neck. Biochem Soc Trans 1993; 21 ( Pt 3):307S. [PMID: 7693524 DOI: 10.1042/bst021307s] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- G Kirkali
- Department of Biochemistry, Medical Faculty, Dokuz Eylül University, Izmir/Turkey
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32
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Affiliation(s)
- M Djavani
- Department of Biochemistry, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey
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33
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Yenice S, Kirkali G, Güner G, Töre IR. The antigenicity of elastin-derived peptides obtained from atherosclerotic human aorta. Biochem Soc Trans 1993; 21:208S. [PMID: 8359459 DOI: 10.1042/bst021208s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- S Yenice
- Department of Biochemistry, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey
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34
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Yenice S, Kirkali G, Güner G, Töre I. Immunospecificity of soluble elastin peptides: determination by ELISA assay. Biochem Soc Trans 1993; 21:209S. [PMID: 8359460 DOI: 10.1042/bst021209s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- S Yenice
- Department of Biochemistry, Kokuz Eylül University Faculty of Medicine, Izmir, Turkey
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35
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Abstract
This study was undertaken to determine tissue and serum ferritin levels in different stages of breast carcinoma. Eighty-nine cases have been evaluated, the groups investigated being breast carcinoma, benign breast disease and healthy controls. Ferritin levels in both the sera and the tissue cytosols were measured by an enzyme immunoassay method, while total proteins were assayed by Lowry's procedure and the ferritin concentrations given in ng ferritin/mg cytosol protein. No significant difference has been determined for serum ferritin between any of the groups studied, while the tissue cytosol ferritins were found to be 91.6 +/- 50.9, 565.0 +/- 48.3, 142.7 +/- 93.3, 683.3 +/- 212.9 and 655.5 +/- 100.4 ng/mg cytosol protein for the benign, malign (global), malign (stage I), malign (stage II) and malign (stage III) groups, respectively. The differences between the malign groups and the benign group were found to be highly significant (P < 0.001) except for the stage I subgroup, which was fairly significant (P < 0.05). A sensitivity of 90% was evaluated for tissue cytosol ferritin in breast carcinoma, the 'intra-patient' sensitivity being 100%. In conclusion, we state that tissue ferritin is more valuable than serum ferritin as a tumour marker of diagnosis for breast carcinoma.
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Affiliation(s)
- G Güner
- Department of Biochemistry, Faculty of Medicine, Dokuz Eylül University, Inciralti, Izmir, Turkey
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36
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Abstract
This study is a quantitative analysis of acid and alkaline phosphatase activity in human brain tumor homogenates and subcellular fractions, in parallel with normal brain tissue. Glioblastoma multiforme, meningioma, astrocytoma and normal tissue samples were separated by ultracentrifugation into five subcellular fractions: nuclei (N), mitochondria (M), microsomes (P), ribosomes (R) and supernatant (S). These two phosphatases showed significant increase in astrocytoma and meningioma tissue homogenates, compared with normal brain tissue. Alkaline phosphatase levels were determined to increase significantly in glioblastoma multiforme tissue homogenates as compared with normals, while those of acid phosphatase were observed to decrease. The results of this investigation also indicate that the subcellular distributions of acid and alkaline phosphatase show differences in the different tumor types. This observation is evidence against metabolic uniformity in tumoral tissue.
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37
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Güner G, Kökoğlu E, Güner A. Hydrogen peroxide detoxication by catalase in subcellular fractions of human brain tumors and normal brain tissues. Cancer Lett 1985; 27:221-4. [PMID: 4005831 DOI: 10.1016/0304-3835(85)90111-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Hydrogen peroxide detoxication by catalase was found to be significantly lower in human brain tumoral tissue as compared with normal brain tissue. As to the subcellular distribution of catalase activity, the tumoral tissue showed a decrease in the nuclear and mitochondrial fractions and an increase in the supernatants.
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Abstract
This study is a qualitative and quantitative comparative analysis of the phosphoglycerides found in human brain tumors and normal brain tissue. Astrocytomas, glioblastomas, meningosarcomas and ependymomas were studied and, in all of these, the total phosphoglyceride levels were found to be significantly lower than in normal controls. Fractionation of the phosphoglycerides by thin-layer chromatography showed definite qualitative and/or quantitative differences in the phosphoglyceride fractions of tumor tissues in comparison with normal brain tissue.
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