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    Comparison of the healing effects of mesazaline and Ganoderma lucidum in acetic acid-induced colitis in rats
    (Korean Surgical Society, 2022) ozden, Huseyin; Sahin, Yasar; Kilitci, Asuman; Karaca, Gokhan; Gomec, Muhammed; Yildiz, Ahmet; Ucar, Cahit
    Purpose: The etiology and pathogenesis of distal colitis (DC) are poorly understood. Activation of intestinal inflammatory response may lead to intestinal tissue necrosis. Antioxidant and anti-inflammatory agents are among the treatment options. Our study aimed to compare the protective effects of mesalazine and Ganoderma lucidum in acetic acid (AA) induced colitis in rats. Methods: Twenty-four rats were randomly grouped as colitis, mesalazine, G. lucidum, and combined (G. lucidum + mesalazine) groups. DC was induced by intrarectal administration of AA. Statistical comparisons were done by using parameters including colonic tissue IL-1, IL-6, TNF-alpha, and CRP levels. Histopathologic changes of the samples of colonic tissue were scored as mucosal damage score and inflammatory score. A P-value of <0.05 was considered significant. Results: Intrarectal administration of AA leads to increased interleukin and CRP levels. High mucosal damage and inflammatory scores were noted in colitis group animals. Single mesalazine or G. lucidum treatment produced considerably decreased tissue interleukin and CRP levels. The lowest tissue interleukin and CRP levels were noted in the combined treatment group of animals. Mucosal damage and inflammatory scores were found to be significantly low in this group of animals. Conclusion: The intrarectal administration of AA results in an activation of intestinal inflammation and severe mucosal damage in colonic tissue. Single use of mesalazine and G. lucidum treatment decreases the severity of intestinal inflammatory response and mucosal damage. The healing effects of the combined treatment of mesalazine and G. lucidum seem to be more effective than that of separate use in the treatment of DC.
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    Effect of ondansetron for preventing of ovarian hyperstimulation syndrome: in an experimental rat model
    (Taylor & Francis Ltd, 2022) Bakirci, Suekrue; Sagsoez, Nevin; Devrim, Tuba; Sahin, Yasar; Bulanik, Murat; Goezueyukari, Hilal
    Objective: Ovarian hyperstimulation syndrome is an iatrogenic condition that occurs in the treatment of infertility. There is no specific treatment available for OHSS. Cabergoline is a dopamine receptor 2 agonist and VEGF-VEGF2 receptor antagonist . Recently, cabergoline has been widely used to prevent the development of OHSS and reduce its severity Serotonin is known as a neurotransmitter and thought to have a role in the mechanism of angiogenesis and in signaling in endothelial cells. Serotonin is said to have similar effects to VEGF . Ondansetron is Selective Serotonin (5-HT3) Receptor Antagonist . It works by blocking the action of serotonin, a natural substance that may cause nausea and vomiting. In the clinical practice today, there is no choice other than cabergoline, to prevent occurrence and reduce severity of OHSS, and sometimes its effects are limited. Methods: In our study, we compared the effect of cabergoline and ondansetron. 32 immature rats were used and the OHSS model was created. Parameters such as hematocrit value , ovarian size, the number of follicles in the ovary, endometrial capillary congestion and thickness values were evaluated and compared. Results: As a result, in our study, it was seen that ondansetron was effective on OHSS in many parameters. It is thought to be as effective as cabergoline. When we look at the literature, this is the first study in which ondansetron was evaluated for this purpose. It would be good to show this effect of ondansetron with other studies.
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    Effects of edaravone on testicular torsion-detorsion injury in rats
    (Wiley, 2024) Sahin, Yasar; Ustuner, Evren; Tutun, Hidayet; Yildirim, Ebru; Eroglu, Oguz; Kurtdede, Efe; Ozkabadayi, Yasin
    Background and objective: This study aimed to assess the protective ability of edaravone on testicular torsion-detorsion injury in rats. Methods: Eighteen adult male Sprague-Dawley rats were randomly divided into three groups: Sham group (control, n = 6); testicular torsion/detorsion (T/D group, n = 6) and T/D+edaravone (T/D+E group, n = 6). The spermatic cords of rats of the T/D group and the T/D+E group were rotated 720(degrees) in a clockwise direction and maintained for 120 min in this torsion position. Around 90 min after the torsion, edaravone at a dose of 10 mg/kg dissolved in saline was administered IP to the T/D+E group. The testicle was counter-rotated to its normal position to allow reperfusion for 4 h. Left testes of each animal were excised 240 min after beginning of reperfusion. Oxidative stress markers (TAS, TOS, SOD, and MDA) and apoptotic pathways (Caspase 3, Caspase 8, Caspase 9, Bcl-2, and Bax,) were assessed by ELISA methods. Also, testicles were subjected to the histopathologic and ultrasound examinations. Results: Ultrasound imaging showed that edaravone reduced the surface area and increased vascularization in testicles with T/D (p < 0.0001, p < 0.05, respectively). Edaravone pretreatment markedly decreased the levels of MDA, TOS, Bcl-2, Bax, Caspase 3, Caspase 8, and Caspase 9 (p < 0.0001). Also, it increased significantly TAS levels (p < 0.0001) and reduced insignificantly SOD activity. Histopathologic examinations demonstrated that edaravone significantly attenuated the histological damage caused by T/D in testicles. Conclusion: Taken together, the findings indicate that pretreatment of edaravone has protective effect against testicular T/D injury.
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    Evaluation of Burn Wound Healing Efficacy and Biocompatibility of Centella asiatica Mediated Synthesised AgNPs Loaded Hybrid Nanofiber Scaffold: In Vitro and In Vivo Studies
    (Wiley-V C H Verlag Gmbh, 2024) Bozkaya, Ogun; Bozkaya, Esra; Ekici, Husamettin; Alcigir, Mehmet Eray; Sahin, Yasar; Cerci, Nebahat Aytuna; Karahan, Siyami
    The aim of this study is to evaluate the cell responses, potential skin reactions during the treatment process and burn wound healing efficacy of electrospun polycaprolactone/polyethylene oxide (PCL/PEO) nanofibers (NFs) containing Centella asiatica mediated synthesized silver nanoparticles (CA-AgNPs) by in vitro and in vivo studies. Apoptosis-necrosis, genotoxicity, hemolysis, and cell attachment studies are carried out within the scope of in vitro tests, and irritation, sensitivity, and burn wound studies are carried out within the scope of in vivo tests. The apoptotic index value of CA-AgNPs-[PCL/PEO] NFs material on L929 fibroblast cells is determined as 5.0 +/- 1.0% at the highest concentration and the necrotic index value is 5.0 +/- 0.3%. Micronucleus rates (%) of NFs treated with CHO (Chinese Hamster Ovary) cells are not at genotoxic level. The hemolytic index value of NFs dressing is determined as 0.23 +/- 0.03%, The primary irritation index (PII) value of NFs wound dressing is calculated as 0.36 by irritation tests. In addition, the potential sensitization reaction of NFs extract on guinea pigs is evaluated and the sensitization score is determined as 0.9. The healing efficacy of NFs material on second-degree burn wounds compared to a commercial product is supported by pathomorphological findings.
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    Investigation of Thiol/Disulfide Balance in Obese Rats with Non-Alcoholic Fatty Liver Disease
    (Korean Soc Pediatric Gastroenterology & Nutrition, 2021) Tursun, Serkan; Gulerman, Hacer Fulya; Gazyagci, Serkal; Sahin, Yasar; Erel, Ozcan; Neselioglu, Salim
    Purpose: Due to the increasing prevalence of obesity worldwide, non-alcoholic fatty liver disease (NAFLD) has reached epidemic dimensions over time. NAFLD is the most common cause of childhood chronic liver disease. There is a relationship between NAFLD and oxidative stress. This study aims to investigate the changes in thiol/disulfide homeostasis parameters to determine the oxidant/antioxidant balance in obese rats with diet-induced NAFLD and healthy rats. Methods: Twelve Wistar albino rats were used in this study. Experimentally produced NAFLD obese rats (n=6) and healthy rats were compared. Experimental NAFLD model was created with a special fatty liver diet (Altromin (R) C1063, Fatty Liver Diet, Exclusivet, Lage, Germany). The biochemical and histopathological features of the groups, as well as serum thiol/disulfide homeostasis parameters, were analyzed and compared. Results: In the experimentally induced NAFLD rat model, they gained more weight than the control group. Steatosis (at least grade 2) occurred in all rats fed with special fatty liver diet for 12 weeks. Histopathologically, no high-grade inflammation was observed in rats with experimental NAFLD after feeding a diet for 12 weeks. Results revealed that aspartate transaminase and alanine transaminase levels were high, albumin levels were low, oxidant stress parameters increased, and antioxidant thiol groups decreased. Conclusion: Experimental NAFLD is characterized by increased oxidant stress accompanying fatty tissue in the liver. Analysis of thiol/disulfide homeostasis parameters in NAFLD can be used in further studies to develop effective treatment options.
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    The apoptotic and proliferative effects of tulathromycin and gamithromycin on bovine tracheal epithelial cell culture
    (Tubitak Scientific & Technological Research Council Turkey, 2022) Sahin, Yasar; Yildirim, Ebru; Yurdakok Dikmen, Begum; Turk, Mustafa
    Gamithromycin and tulathromycin are commonly used in the treatment of bovine respiratory bacterial diseases. The current work was undertaken to establish the apoptotic, necrotic, and cytotoxic effects of these antibiotics in the target animal. Cells with apoptosis and necrosis were determined by dual staining method, cytotoxic effects were determined by MTT assay, cell proliferative effects were examined by XCelligence real-time cell analysis system (RTCA-SP). The comparison between gamithromycin and tulathromycin concentrations on tracheal cells in terms of % cell viability was found to be significantly different. While the cell viability percentage of gamithromycin was higher at 150 mu g/mL, 180 mu g/mL, and 240 mu g/mL than tulathromycin, and at 2 mu g/mL, 4 mu g/mL, 10 mu g/mL, 20 mu g/mL, and 50 mu g/mL concentrations tulathromycin cell viability was higher than gamithromycin (p < 0.05). When the staining method data were evaluated, the difference between the results of % apoptotic index at 20 mu g/mL concentration was significant and it was found that gamithromycin had more apoptotic effect than tulathromycin (p < 0.05). It was seen that tulathromycin and gamithromycin applied on tracheal epithelial cells at concentrations of 2 and 10 mu g/mL increased the viability depending on time. The increase in epithelial cell proliferation of gamithromycin and tulathromycin due to time shows that these antibiotics can maintain longterm prophylactic treatment against diseases.
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    The effect of krill oil on Wnt/ß-catenin signaling pathway in acetaminopheninduced acute liver injury in mice
    (Walter De Gruyter Gmbh, 2023) Sahin, Yasar; Devrim, Alparslan Kadir; Alcigir, Mehmet Eray; Senol, Ali; Ekici, Husamettin; Devrim, Tuba; Sudagidan, Mert
    Objectives: This study investigated the effect of krill oil (KO) on liver damage caused by acetaminophen (APAP). Methods: In the present study, the control and APAP groups were given distilled water by gavage for 14 days. In addition, the KO and APAP+KO groups were given 500 mg/kg krill oil by gavage for 14 days. At the end of 14 days, 0.9 % sodium chloride solution (saline solution) administration was applied intraperitoneally to the control and KO groups. Meanwhile, 220 mg/kg acetaminophen was administered to the APAP and APAP+KO groups. While some biochemical parameters in plasma were examined, some oxidative stress parameters in plasma and liver tissue were evaluated. Apoptotic and inflammatory responses of some primer sequences determined by quantitative Real-Time PCR (qPCR) in liver tissue. After histopathological examination of liver tissue, immunohistochemical analysis was performed with Wnt inhibitory factor-1 (Wif-1), beta-catenin (ss-Catenin), and 8-hydroxy-2'-deoxyguanosine (8-OHdG). Results: The Wif-1 positivity in hepatocytes increased significantly in the APAP group (5.29 +/- 0.71) compared to the control (1.14 +/- 0.51), and KO (2.14 +/- 0.55) groups (p<0.001). The 8-OHdG positivity in hepatocytes increased significantly in the APAP group (19.57 +/- 0.58) compared to the control (0.43 +/- 0.20), KO (3.57 +/- 0.48), and APAP+KO (4.00 +/- 2.53) groups (p<0.001). Conclusions: As a result, krill oil could be used as a nutritional supplement to protect the liver against acetaminopheninduced liver injury.
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    Ultrasonographic and histopathological investigation of the effect of N-acetylcysteine on doxorubicin-induced ovarian and uterine toxicity in rats
    (Bmc, 2024) Ustuner, Evren; Yildirim, Ebru; Macun, Hasan Ceyhun; Ekici, Huesamettin; Sahin, Yasar; Guncum, Enes; Anteplioglu, Tugce
    Background This study aimed to investigate the mitigating effect of N-acetylcysteine (NAC) on doxorubicin (DOX)-induced ovarian and uterine toxicity in rats using laboratory tests, ultrasonographic (US) imaging, and histopathology analysis. Methods Forty-eight rats were divided into six groups (n = 8) as follows: Group A (control) (0.5 mL saline administered intraperitoneally [IP]), Group B (a single 10 mg/kg dose of DOX administered IP on day 1), Group C (a single 10 mg/kg dose of DOX administered IP 24 h before sacrifice), Group D (100 mg/kg of NAC administered IP for 21 days), Group E ( a single 10 mg/kg dose of DOX administered IP on day 1 and 100 mg/kg of NAC administered IP for 21 days), and Group F (100 mg/kg of NAC administered IP for 21 days and a single 10 mg/kg dose of DOX administered IP 24 h before sacrifice). The ovaries were examined using B-mode US on days 1, 14, and 21, and the histopathological examinations of the ovaries and the uterus were undertaken after sacrifice on day 22. Results Histomorphological analyses showed that ovarian weight decreased after DOX administration in Group B but not in Group E. US revealed a transient increase in ovarian size in Group B and E, reverting to baseline levels over time, as well as a progressive increase in peritoneal fluid in Groups B and E. Group B exhibited a significant decrease in the thickness of the endometrium and myometrium and uterine cornual length, which was not observed in Group E. Histopathological examination showed that DOX caused a decline in follicular count, especially in primordial, secondary, and Graafian follicles, and resulted in follicular atresia, predominantly in Group B. Destructive degeneration/necrosis and vascular changes were most prominently seen in the corpus luteum of Groups C and B. In NAC-treated rats (Groups E and F), although germ cell damage was present, atretic follicles and vascular changes, such as hyperemia and congestion, were reduced. The anti-m & uuml;llerian hormone (AMH) level was the highest in Group F. Conclusions NAC, an antioxidant, attenuated DOX-induced gonadotoxicity in rats.