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Öğe Effect of a high sucrose and high fat diet in BDNF ( plus /-) mice on oxidative stress markers in adipose tissues(Elsevier Science Inc, 2019) Bodur, Akın; İnce, İmran; Kahraman, Cemil; Abidin, İsmail; Abidin, Selcen Aydın; Alver, AhmetThe purpose of this study was to investigate the effects of a high fat and a high sucrosediet in wild type and BDNF (+/-) mice on oxidative stress in epididymal and subcutaneousadipose tissues by measuring different markers of oxidative stress and antioxidant enzymes. Wild type (WT) and BDNF (+/-) male mice were divided into six groups receiving fed control diet (CD), high sucrose diet (HSD), or high fat diet (HFD) for four months. Levels of 3-nitrotyrosine (3-NT) increased in the HFD-fed BDNF (+/-) mice, while 4-hydroxynonenal (4-HNE) levels increased in the CD and HFD-fed BDNF (+/-) groups. Malondialdehyde (MDA) levels decreased in subcutaneous tissue compared to epididymal adipose tissue, independently of diet type. Superoxide dismutase (SOD) activity was reduced by HFD (p < 0.05), butglutathione peroxidase (GSH-Px) activity was increased by HSD in epididymal adipose tissuein BDNF (+/-) mice (p < 0.05). GSH-Px activities was increased by CD and HFD in subcutaneous adipose tissue of BDNF (+/-) (p < 0.05). SOD2 and GSH-Px3 expressions were only decreased by HSD in epididymal and subcutaneous adipose tissues of BDNF (+/-) mice (p < 0.05). In conclusion, reduced BDNF may increase OS in epididymal adipose tissue, but not in subcutaneous adipose tissue following HSD and HFD.Öğe Hyperbaric oxygen therapy affects insulin sensitivity/resistance by increasing adiponectin, resistin, and plasminogen activator inhibitor-I in rats(Tubitak Scientific & Technical Research Council Turkey, 2021) Kahraman, Cemil; Yaman, HuseyinBackground/aim: Hyperbaric oxygen therapy (HBOT) causes insulin sensitivity, but the reason for this is not known yet. The aim of the present study was to investigate the effect of HBOT on insulin sensitivity via resistin, plasminogen activator inhibitor-I (PAI-I), and adiponectin. Materials and methods: The study was designed using HBOT and control groups, with eight rats in each group. After 20 days of HBOT under 2.5 atmospheres for 90 min, the fasting insulin (FI), resistin, PAI-I, homeostatic model assessment of insulin resistance scores (HOMA-IR), quantitative insulin sensitivity check index (QUICKI), fasting plasma glucose (FPG), triglyceride, and high-density lipoprotein cholesterol (HDL-C) in the plasma were measured. The resistin, PAI-I, and adiponectin mRNA expression levels were also measured in the adipose tissue. Results: Compared to the control group, the FI, FPG, and HOMA-IR scores were significantly lower in the HBOT group, whereas the HDL-C and QUICKI scores were found to be higher. In addition, the resistin, adiponectin, and PAI-I mRNA expression levels were also higher in the HBOT group. Conclusion: The present study demonstrated that the HBOT had regulated the FI, FPG, and HDL-C associated with metabolic syndrome and diabetes mellitus. Moreover, the study showed that HBOT causes insulin sensitivity by raising adiponectin.Öğe Investigation of the relationship between oxidative stress and SCUBE1 levels in high fat diet-induced obese rats(Tubitak Scientific & Technical Research Council Turkey, 2018) Bodur, Akın; Kahraman, Cemil; Altay, Diler Us; Rendi, Taghi Ahmadi; Menteşe, Ahmet; Alver, AhmetBackground/aim: This study aimed to investigate signal peptide-Cub-EGF domain-containing protein 1 (SCUBE1) levels and oxidative stress (OS) in a high fat diet (HFD)-induced obese rat model. Materials and methods: Fourteen rats were randomly divided into two groups. Group 1, the control group, was given a standard diet (10% calories of fat) and Group 2, the obese group, was given a HFD (60% calories of fat), both for 70 days. Rats were then sacrificed and serum samples were collected. Serum glucose and triglyceride concentrations were determined using an autoanalyzer. Serum SCUBE1, adiponectin, and plasminogen activator inhibitor-1 levels were determined using an enzyme-linked immunosorbent assay. Serum malondialdehyde levels and superoxide dismutase and glutathione peroxidase enzyme activities were determined using colorimetric methods. Results: Final body weight was higher in the obese group (P = 0.007). Serum malondialdehyde concentrations were also higher in the obese group (P = 0.021). Serum glutathione peroxidase activities were higher in the control group (P = 0.028). Serum SCUBE1 levels were also higher in the control group (P = 0.038). Conclusion: There may be no connection between the measured OS parameters and SCUBE1. Differences in SCUBE1 levels may therefore be evaluated independently from OS in obesity.Öğe Reciprocal Effects of Adipose Tissue Denervation and High Fat Diet on Serum Metabolic Parameters and Adipokine Levels in Rats: A Long Term Study(Pleiades Publishing Inc, 2022) Kahraman, Cemil; Rendi, T. Ahmadi; Sağlam, Neslihan; Akça, İmran İnce; Abidin, İsmail; Alver, AhmetThe sympathetic nervous system (SNS) plays an important role in regulating the metabolic and secretory functions of white adipose tissue. In this study, it was aimed to investigate the long term effects of bilateral retroperitoneal adipose tissue denervation and high fat diet (HFD) on general metabolic status and serum levels of some adipokines in rats. For this purpose, we fed denervated and control rats with control and high fat diet for 70 days. At the end of the feeding program, denervation caused an increase in serum triglyceride (p < 0.01), leptin (p < 0.05) and adiponectin levels (p < 0.01), as well as body weight (p < 0.05) in the group with the control diet (CD). We also observed that the serum adiponectin levels (p < 0.05), of the animals in the denervated HFD group was higher than the non-denervated group whereas the body weight and leptin/adiponectin ratio were reduced. Our data indicate that bilateral denervation of a pad of white adipose tissue in rats causes different changes in metabolic parameters and circulating adipokine levels at different energy states, and in the long term, while denervation mimicked obesity in the control diet group, it to some extent suppressed the effects of a high fat diet in the HFD group.Öğe The regulation of adipokines related to obesity and diabetes is sensitive to BDNF levels and adipose tissue location(Springer Int Publ Ag, 2022) Akça, İmran İnce; Bodur, Akın; Kahraman, Cemil; Abidin, İsmail; Aydın-Abidin, Selcen; Alver, AhmetPurpose The role of BDNF in adipose tissue metabolism is poorly understood. We investigated the effects of decreased levels of BDNF on the expression of major adipokines in different fat depots (e.g., subcutaneous and epididymal) of mouse groups fed three different diet protocols. Methods BDNF heterozygous (+ / -) mice were used to evaluate the effect of reduced BDNF levels. Six groups of C57BL/6 J breed wild type (WT) and BDNF (+ / -) mice were formed. These groups were fed, respectively, a control diet (CD), a high-fat diet (HFD), and a high-sucrose diet (HSD) for 4 months. Serum samples and adipose tissues were used for biochemical assays. The serum concentrations and tissue expression levels of leptin, adiponectin, and resistin were measured. Results Compared to the CD-fed WT group (control group), serum leptin and leptin expression levels were found to be higher in all experimental groups. Serum adiponectin levels were lower in the BDNF (+ / -) groups and HFD-fed WT group than in the control group. Epididymal adiponectin expression was found to be lower in the HFD-fed BDNF (+ / -) group and higher in HSD-fed groups than in the control group. Compared to the control group, adiponectin expression increased in the WT groups in subcutaneous adipose tissue. Serum resistin levels were elevated in the HFD-fed groups. Resistin expression in epididymal adipose tissue was lower in the CD-fed and HFD-fed groups than in the control group. Conclusions BDNF levels and diet differentially affect the expression of adipokines in different fat tissues in the body. BDNF may play a protective role in obesity and diabetes.Öğe Resistin levels in denervated obese rats(Wiley-Blackwell, 2016) Sağlam, Neslihan; Randi, T. Ahmedi; Kahraman, Cemil; Alver, Ahmet…
