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Öğe Immunoglobulins and acute phase proteins in Van cats - associations with sex, age, and eye colour(Tubitak Scientific & Technological Research Council Turkey, 2021) Coskun, Pinar; Altunok, Vahdettin; Kazak, Filiz; Yuksek, NazmiIt was aimed to determine concentrations of plasma immunoglobulins (IgG, IgA, IgM) and acute phase proteins (alpha-1 acid glycoprotein, serum amyloid A, ceruloplasmin) and the association of these parameters with age, sex, and eye colour in Van cats. Blood plasma of healthy, forty-seven Van cats (Van Cat Home) fed with standard cat food were involved in the study. Cats were divided into four groups based on age (<1, 2 to 2.5, 3 to 4, > 5) and eye colour (amber-amber, amber-blue, blue-amber, and blue-blue eyes described from left to right), and two groups based on sex (male and female). Plasma IgG, IgA, IgM, alpha-1 acid glycoprotein, serum amyloid A, and ceruloplasmin concentrations were determined, and the concentrations were found to be 2.20 +/- 0.05 mg/mL, 1.05 +/- 0.04 mg/mL, 2.52 +/- 0.18 mg/mL, 562.00 +/- 14.27 mu g/mL, 1.49 +/- 0.03 mu g/mL, and 2.88 +/- 0.13 mg/dL, respectively. Male Van cats had higher IgA levels than the female cats (P < 0.05). alpha-1 acid glycoprotein concentrations in cats under 1-year-old were higher from that in the other age groups, whereas the significant difference was obtained compared to 2 to 2.5-year-old cats (p < 0.05). IgM concentrations were higher in cats with blue-blue eye colour than in the cats with other eye colours, while statistically significant difference was observed only cats with amber-blue eye colour (p < 0.05). Amber-amber eyed cat plasma ceruloplasmin concentrations were higher from that in the other eye coloured cats while significant difference was determined compared to amber-blue eyed cats (p < 0.05). Plasma immunoglobulins and acute phase proteins were determined and the associations of these parameters with age, sex, and eye colour were examined for the first time in Van cats. These data are thought to be important as reference levels in terms of diagnosis and prognosis.Öğe Nobiletin alleviates methotrexate-induced hepatorenal toxicity in rats(Taylor & Francis Ltd, 2024) Kazak, Filiz; Uyar, Ahmet; Coskun, Pinar; Yaman, TuranWe investigated the possible ameliorative effects of nobiletin (NBL) against methotrexate (MTX)-induced hepatorenal toxicity in rats. Twenty-eight Wistar albino rats were randomly divided into four groups, namely: Control; MTX (administered 20 mg/kg MTX); MTX+NBL (administered 20 mg/kg MTX and 10 mg/kg NBL per day); and NBL (administered 10 mg/kg/day NBL). Histopathological, immunohistochemical and biochemical analyses were performed on the kidney and liver tissues of rats at the end of the study. MTX caused renal toxicity, as indicated by increases in malondialdehyde (MDA) and caspase-3, as well as decreases in reduced glutathione (GSH), glucose-6-phosphate dehydrogenase (G6PD), glutathione peroxidase (GPx), catalase (CAT) and B-cell lymphoma-2 (Bcl-2). MTX also caused hepatotoxicity, as indicated by increases in 8-hydroxy-2'-deoxyguanosine (8-OHdG), tumor necrosis factor alpha (TNF-alpha), MDA and caspase-3 and decrease in interleukin 10 (IL-10), GSH, total antioxidant capacity, GPx, G6PD, CAT and Bcl-2. MTX caused histopathological changes in kidney and liver tissues indicating tissue and cellular damage. Administration of NBL concurrently with methotrexate reduced oxidative stress, inflammatory and apoptotic signs, and prevented kidney and liver damage caused by methotrexate. We consider NBL has attenuating and ameliorating effects on methotrexate-induced hepatorenal toxicity.Öğe Protective and therapeutic effects of nobiletin against cisplatin-induced nephrotoxicity in rats(Taylor & Francis Ltd, 2024) Kazak, Filiz; Coskun, Pinar; Yarim, Gul Fatma; Baspinar, Nuri; Ozdemir, Ozgur; Ates, Mehmet Burak; Altug, Muhammed EnesPossible protective and therapeutic effects of nobiletin on kidney in a cisplatin-induced nephrotoxicity rat model were investigated. Forty male albino rats were divided into four groups: control, cisplatin (CIS), cisplatin+nobiletin (CIS+NOB), and nobiletin+cisplatin (NOB+CIS). At the end of the study, the rats were subjected to biochemical, histological and immunohistochemical analyzes. Compared to the control group, tGSH (p < 0.05) levels, and G6PD (p < 0.05) and GPx (p < 0.001) activities, were increased in the CIS group; while significant (p < 0.05) decreases occurred in the MDA and TOC levels. Histopathologically, the kidneys of the groups administered nobiletin (CIS+NOB, NOB+CIS) were significantly different from the CIS group, being closer to control group in terms of degeneration and hyaline cylinder formation in the tubules (p < 0.05). While dilatation in the tubules, protein-rich fluid and hyaline cylinder formation in the lumen were most common in the CIS group, a significant decrease (p < 0.05) of these parameters was seen in the nobiletin groups (CIS+NOB, NOB+CIS). This study suggests that nobiletin can be effective in preventing and ameliorating toxic effects of cisplatin on the kidney.Öğe The protective effect of Boswellic acid and Ellagic acid loaded, colon targeted, and pH-sensitive N-succinyl chitosan in ulcerative colitis rat model(Elsevier, 2022) Yipel, Mustafa; Tekeli, Ibrahim Ozan; Altinok-Yipel, Fulya; Coskun, Pinar; Aslan, Abdullah; Guvenc, Mehmet; Beyazit, NeslihanTargeted drug delivery systems that provide therapeutic activity with lower concentrations of both herbal and other substances, while reducing access to non-target sites and undesirable effects; have an important potential for future projections in terms of pharmacological and toxicological studies. The present study aimed to investigate the protective effects of Acetyl 11-keto-beta-boswellic acid (AKBA) and Ellagic acid (EA) loaded, colon targeted, and pH-Sensitive N-succinyl chitosans (NsCh) in ulcerative colitis (UC) model induced by acetic acid (AA) in rats. The physicochemical characterization (elemental analysis, FT-IR, DSC, XRD, SEM, NMR) analyses, swelling, and releasing tests of NsCh's suggested that AKBA and EA were successfully loaded to pH-sensitive polymer and targeted to the colon. The targeted AKBA and EA were administered to Wistar rats (n:30, 5 groups) and damage, inflammatory cytokine, protein expression, oxidative stress, and antioxidant parameter levels in colon tissues of the groups were determined. Increase in the levels of CAT, GPx activities, and decrease in necrosis, inflammation, and levels of MDA, TNF-alpha, COX-2, NF-kB were observed in the targeted EA and AKBA groups compared to the UC group. The potential protective effect of EA and AKBA loaded, colon-targeted, pH sensitive controlled releasing system against UC and the potential to be licensed preparations by completing the next stages of in vitro and in vivo studies were demonstrated.Öğe Rutin Attenuates Methotrexate-Induced Hepatic Oxidative Stress in Rats*(Ataturk Universitesi, 2021) Turk, Sueda; Kazak, Filiz; Coskun, Pinar; Kisacam, Mehmet AliThis study aimed to assess the antioxidant effects of rutin on methotrexate-induced hepatic oxidative stress. Wistar Albino rats (n=24) were separated into 4 groups: control group (C); methotrexate (M, 20 mg/kg, single dose) group; rutin (R, 50 mg/kg/day, for fifteen days) group; and methotrexate + rutin [MR, methotrexate (20 mg/kg, single dose) + rutin (50 mg/kg/day, for fifteen days)] group. Rats were sacrificed on the sixteenth day and liver tissues were removed. The liver glucose-6-phosphate dehydrogenase (G6PD), glutathione peroxidase (GPx), malondialdehyde (MDA), nicotinamide adenine dinucleotide phosphate (NADPH), total glutathione (tGSH), and vitamin C were determined colorimetrically. Malondialdehyde increased and vitamin C decreased in the M group compared to the others (P<0.001). Total glutathione reduced in both M and MR groups compared to C group (P<0.05). An important decrease in M group NADPH and GPx compared to C group (P<0.001) was observed. Nicotinamide adenine dinucleotide phosphate of R group were determined to be higher than M group (P<0.001). In this study, it might demonstrate that methotrexate caused oxidative stress in the liver and rutin had antioxidant effects on methotrexate-induced hepatic oxidative stress. Consequently, it can be suggested that rutin may be useful in attenuating the side effects of methotrexate on the liver. © 2021 Ataturk Universitesi. All rights reserved.
