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    68GA-FAPI-04 PET/CT Versus 18F-FDG PET/CT in Imaging of Malignant Mixed Germ Cell Testicular Tumor
    (Lippincott Williams & Wilkins, 2023) Kaplan, Ihsan; Can, Canan; Guzel, Yunus; Alabalik, Ulas; Komek, Halil
    F-18-FDG PET/CT imaging was performed for restaging in in a 16-year-old boy who was operated on for right testicular tumor and was diagnosed with malignant mixed germ cell tumor. Mild FDG uptake was observed in 2 nodules in both lungs and retroperitoneal lymph node in the abdomen. Ga-68-FAPI (fibroblast activation protein inhibitor) 04 PET/CT showed moderate uptake of FAPI in lung nodules and retroperitoneal lymph node. In this case, Ga-68-FAPI-04 PET/CT was shown to be superior to F-18-FDG PET/CT in the evaluation of malignant mixed germ cell testicular tumor metastases.
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    Aquaporin 1, Aquaporin 3 and Aquaporin 5 expression and EGFR mutation in malignant pleural mesotheliomas: an imunohistochemical and molecular study
    (Taylor & Francis Ltd, 2017) Alabalik, Ulas; Turkcu, Gul; Keles, Ayse Nur; Ibiloglu, Ibrahim; Urakci, Zuhat; Buyukbayram, Huseyin
    Malignant pleural mesothelioma is a rare and fatal malignancy. This disease is, unfortunately, at its advanced stage when it is diagnosed. Survival time is usually not more than a few months. The aim of this study was to analyse the expression of Aquaporin 1, Aquaporin 3 and Aquaporin 5 in malignant pleural mesotheliomas and to explore the relationship of these levels of expression with epidermal growth factor receptor (EGFR) gene mutation and prognostic parameters. In this study, 60 cases diagnosed as malignant pleural mesothelioma among the pleural biopsy materials in the archives of the Pathology Department of Medical Faculty of Dicle University in 2003-2013 were evaluated. The tissues were stained immunohistochemically with antibodies against Aquaporin 1, Aquaporin 3 and Aquaporin 5, and the existence of EGFR mutation was investigated in the tissues by real-time polymerase chain reaction (PCR). The obtained results showed expression of Aquaporin 1, Aquaporin 3 and Aquaporin 5 in varied amounts in malignant pleural mesotheliomas. However, no significant relation was obtained thus far between the expression levels of these aquaporins and the prognostic parameters. No mutations were detected in the EGFR gene exons 18-21 by using real-time PCR. It could be suggested that although Aquaporin 1, Aquaporin 3 and Aquaporin 5 are expressed in malignant pleural mesothelioma, they do not have any effect on the prognostic parameters. Mutations in different domains of EGFR gene, other than exons 18-21, should be sought to develop new targeted treatments.
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    The Biochemical and Histologic Effects of Adnexal Torsion and Early Surgical Intervention to Unwind Detorsion on Ovarian Reserve: An Experimental Study
    (Sage Publications Inc, 2013) Ozler, Ali; Turgut, Abdulkadir; Soydinc, Hatice Ender; Sak, Muhammet Erdal; Evsen, Mehmet Siddik; Alabalik, Ulas; Basarali, Mustafa Kemal
    Objective: The aim of the present study was to determine to what extent ovarian reserves are affected by ischemia-reperfusion injury, evaluating the number of growing follicles and the serum levels of the ovarian hormones. Study Design: Thirty female fertile adult Wistar albino rats, weighing 200 to 220 g, were previously numbered to randomization, and then randomly divided into 3 equal groups (n = 10): sham, torsion, and detorsion groups. In torsion and detorsion groups, bilateral adnexal torsion (3-hour ischemia) was carried out. Bilateral adnexal detorsion (3-hour reperfusion) was performed in the detorsion group. Results: The mean number of preantral and small antral follicles in detorsion group were lower than those of the sham group (P < .01). After torsion, anti-Mullerian hormone (AMH), estradiol, and inhibin B levels decreased significantly compared to the preoperative and postoperative periods (P = .003, P = .032, and P = .014, respectively). In detorsion group, only AMH levels were found to decrease significantly following the 3-hour ischemia and 3-hour reperfusion (P < .05). Conclusion: After adnexal torsion, a significant decrease in ovarian reserve has been detected for the first time in this study. Additionally, the results of this study suggest that conservative surgery alone is insufficient to protect ovarian reserve.
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    Bullous Pemphigoid Mimicking Discoid Lupus Erythematosus: A Case Report
    (Aves, 2014) Ucmak, Derya; Akkurt, Zeynep Meltem; Sula, Bilal; Acar, Gurbet; Alabalik, Ulas; Arica, Mustafa
    [Abstract Not Available]
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    Can aquaporins be used as diagnostic and prognostic markers for uterine smooth muscle tumours?
    (Taylor & Francis Ltd, 2017) Alabalik, Ulas; Turkcu, Gul; Keles, Ayse Nur; Ibiloglu, Ibrahim; Ozler, Ali; Urakci, Zuhat; Buyukbayram, Huseyin
    Generally, uterine leiomyosarcoma is easily diagnosed. However, uterine smooth muscle tumours which show atypical histological features and unusual growth patterns may mimic malignancy and may not be easily diagnosed. In this study, our aim is to show the expressions of Aquaporin3, Aquaporin7 and Aquaporin9 in uterine smooth muscle tumours, and to investigate if aquaglyceroporins can be used as diagnostic and prognostic markers to start rapidly an appropriate treatment for patients with these tumours in order to extend the survival time. We determined that there had been 74 patients diagnosed with uterine smooth muscle tumours. We divided patients into four groups based on the diagnosis: bizarre leiomyoma, smooth muscle tumour of uncertain malignant potential, leiomyosarcoma and leiomyoma. Aquaporin3, Aquaporin7 and Aquaporin9 were detected by using monoclonal anti-Aquaporin3, anti-Aquaporin7 and anti-Aquaporin9 antibodies, respectively. In leiomyosarcoma group, we observed a statistically significant relation of Aquaporin3 expression with survival time, grade, stage, mitotic index and Ki-67 score. A significant relation of both Aquaporin7 and Aquaporin9 expressions with survival time, grade, stage was not statistically detected in leiomyosarcoma group. The decrease of Aquaporin3 expression can be used as important diagnostic and prognostic marker. Aquaporin7 and Aquaporin9 expressions cannot be used as diagnostic and prognostic markers.
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    Comparing the effects of nebivolol and dexpanthenol on wound healing: an experimental study
    (Wiley, 2016) Ulger, Burak V.; Kapan, Murat; Uslukaya, Omer; Bozdag, Zubeyir; Turkoglu, Ahmet; Alabalik, Ulas; Onder, Akin
    Wound healing is a dynamic, interactive process that is initiated in response to injury. A number of investigations and clinical studies have been performed to determine new approaches for the improvement ofwound healing. The aim of this studywas to compare the effects of dexpanthenol, a molecule that is widely used for improvingwound healing, and nebivolol, a molecule that increases nitric oxide release, on wound healing. A total of 30 rats were divided into three equal groups (n = 10). A linear 2 cm incision was made in the rats' skin. No treatment was administered in the first (control) group. Dexpanthenol cream was administered to the rats in the second group and 5% nebivolol cream was administered to the rats in the third group. The wound areas of all of the rats were measured on certain days. On the 21st day, all wounds were excised and histologically evaluated. The wound healing rates of the dexpanthenol and nebivolol groups were higher than those of the control group (P < 0.05). However, the wound healing rates of the dexpanthenol and nebivolol groups were not significantly different. Nebivolol and dexpanthenol have comparable effects on wound healing.
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    COMPARISON OF SKIP EXPRESSION IN MALIGNANT PLEURAL MESOTHELIOMAS WITH KI-67 PROLIFERATION INDEX AND PROGNOSTIC PARAMETERS
    (Vesalius Univ Medical Publ, 2016) Turkcu, Gul; Alabalik, Ulas; Keles, Ayse Nur; Ibiloglu, Ibrahim; Kucukoner, Mehmet; Sen, Hatice Selimoglu; Buyukbayram, Huseyin
    We aimed to determine the presence of SKI-interacting protein (SKIP) expression in malignant pleural mesothelioma (MPM) and its effect on prognosis by investigating SKIP correlation with the Ki-67 proliferation index and prognostic parameters. Pathological preparations of the patients diagnosed with MPM between 2006 and 2012 were evaluated. Immunohistochemical analyses were performed to evaluate the expression of SKIP and the Ki-67 proliferation index. Correlations between SKIP expression, clinicopathological factors and survival were investigated. Survival data were calculated using the Kaplan-Meier method, and Cox regression analysis was used to evaluate the prognostic value of the variables. In total, 52 patients were evaluated in the study; 36 of them were male and 16 were female. The mean age of the patients was 62.3 +/- 12.2 years. The median overall survival period was 8.5 months. Factors negatively affecting general survival in the univariate analysis included high SKIP expression, Ki-67 proliferative index over 30%, presence of non-epithelioid type MPM and stage III-IV disease (p < 0.05). Cox regression analysis revealed that high SKIP expression, high Ki-67 proliferative index and presence of non-epithelioid type MPM are independent factors that affect the survival rate. Higher SKIP expression is associated with poor prognosis in MPM.
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    Does Short Term Usage of Fresh Pomegranate Juice (FPJ) Protect Cochlear Hair Cells after Cisplatin-Based Chemo-Irradiation?
    (Aves, 2014) Akdag, Mehmet; Dasdag, Suleyman; Alabalik, Ulas; Yilmaz, Beyhan; Altas, Sevcan; Zincircioglu, Seyit Burhanedtin; Gul, Aylin
    OBJECTIVE: The aim of this study was to investigate the protective effect of short-term usage of fresh pomegranate juice (FPJ) on ototoxicity after cisplatin-based chemo-irradiation. MATERIALS and METHODS: The study was carried out on 56 adult Wistar Albino rats, which were divided into 8 groups (n: 7 for each group). The first group was accepted as the sham control group. However, rats in the seven experimental groups were treated with FPJ; cisplatin; irradiation; irradiation plus FPJ; cisplatin plus FPJ; both cisplatin and irradiation; and combined use of cisplatin, irradiation, and FPJ, respectively. Ototoxicity was evaluated by Distortion Product Otoacoustic Emissions (DPOA), histopathology, and paracochlear protein carbonyl content. RESULTS: The results of the study showed that cisplatin, irradiation, and both cisplatin and irradiation treatments affected hair cells dramatically. However, the results of cisplatin plus FPJ and combined use of cisplatin, irradiation, and FPJ indicated that FPJ plays an important role in protecting hair cells in the inner ear. Additionally, the findings of signal-noise ratio and protein carbonyl values also supported the results stated above. CONCLUSION: Fresh pomegranate juice treatment can be a supportive agent to reduce hair cell injury in the inner ear of patient treated by cisplatin, radiotherapy, or cisplatin-based chemo-irradiation. However, more performance is necessary for further studies, especially on long-term treatment with FPJ.
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    Does usage of a room air freshener affect the nasal mucosa?
    (Sage Publications Inc, 2014) Akdag, Mehmet; Bakir, Salih; Alabalik, Ulas; Ozkurt, Fazil Emre; Topcu, Ismail
    Background: Effects of chemicals emitted from the room air freshener sprays (RAFSs) on nasal mucosa are still unclear. The purpose of this study was to investigate effects of RAFSs on the nasal mucosa of rats for different time intervals. Methods: Twenty-eight rats were randomly divided into four experimental groups: group 1 (n = 7) was the control group and not exposed to RAFS or other chemicals, group 2 (n = 7) was exposed to RAFS for 1 month, group 3 (n = 7) was exposed to RAFS for 2 months, and group 4 (n = 7) was exposed to RAFS for 3 months. Samples from the nasal septum were stained using hematoxylin and eosin solution, examined by a pathologist using a light microscope, and analyzed with Fisher's exact test. Results: We observed that distinct histopathological differences in the nasal mucosa of exposed rats depends on different time intervals (p < 0.05). Increased congestion was found after the 1st month of exposure (group 2). Although edema and mild inflammatory cell infiltration, including some eosinophils, was seen after the 2nd month (group 3), squamous metaplasia, numerous eosinophils, and intense inflammatory cell infiltration began after 3 months of exposure (group 4). Conclusion: Our results showed that continuous use of RAFS can cause inflammation and eosinophilic infiltration in rats, which begins after 2 months of exposure and may lead to metaplasia after 3 months. Because of differences in body size, geometry, and physiological responses of rats, the extrapolation of these results to humans is not straightforward. However, any such comparison should be made with caution. Finally, more performance is necessary to clarify this subject.
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    Effect of caffeic acid phenethyl ester on myringosclerosis development in the tympanic membrane of rat
    (Springer, 2015) Kinis, Vefa; Ozbay, Musa; Alabalik, Ulas; Gul, Aylin; Yilmaz, Beyhan; Ozkurt, Fazi Emre; Sengul, Engin
    Myringosclerosis is hyalinization and calcification of certain areas of the tympanic membrane, especially the fibrous lamina propria layer and appears as white sclerotic lesions. Ventilation tube insertion is one of the most performed operations in the pediatric otorhinolaryngology practice to treat chronic otitis media with effusion. Myringosclerosis is a very common sequela of ventilation tube insertion. In this experimental study, our aim was to show the histopathological effects of caffeic acid phenethyl ester on myringosclerosis development in rat tympanic membrane after myringotomy. The rats were randomly categorized into four experimental groups including the comparison group (n = 4), non-treated group (n = 7), the saline (control) group (n = 7), the caffeic acid phenethyl ester group (n = 7). Non-treated group did not receive any treatment for 15 days. Saline (2.5 mL/kg, intraperitoneal) was administered to the third group once a day for 15 days. Fourth group received caffeic acid phenethyl ester intraperitoneally once a day at a dose of 10 mu mol/kg for 15 days. Myringotomy was performed on the right tympanic membrane of all rats except comparison group using a sterile pick with the help of an operating microscope. Histopathological examination of myringosclerosis formation was done by a pathologist under light microscope. In histopathological analysis of groups, the severity of inflammation was milder in caffeic acid phenethyl ester group compared to non-treated and saline groups (p < 0.05). There was less myringosclerotic plaques in caffeic acid phenethyl ester group than in non-treated and saline groups (p < 0.05). TM thickness measurements were very close to each other in non-treated and saline groups. The tympanic membrane thickness of caffeic acid phenethyl ester group was much thinner than the other two groups (p < 0.05). Caffeic acid phenethyl ester decreases inflammation severity and the formation of myringosclerotic plaques. These two effects resulted in thinner tympanic membranes of rats which were treated with caffeic acid phenethyl ester. As a result, caffeic acid phenethyl ester has potential preventive effects on myringosclerosis development after myringotomy and ventilation tube insertion.
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    The Effect of Corticosteroid Against Streptomycin Ototoxicity
    (Lippincott Williams & Wilkins, 2013) Kinis, Vefa; Ozbay, Musa; Bakir, Salih; Sengul, Engin; Yorgancilar, Ediz; Keles, Aysenur; Alabalik, Ulas
    The aim of this experimental study was to determine the possible protective role of corticosteroid in prevention of streptomycin-induced ototoxicity. Twenty-eight adult Wistar albino rats were divided into 4 groups: control (n = 7), streptomycin (n = 7), corticosteroid (n = 7), and streptomycin + corticosteroid (n = 7). Rats were tested with distortion product otoacoustic emissions (DPOAEs) in the beginning and at the end of the study. The animals in all groups were killed under general anesthesia on the 45th day after the last DPOAE measurements. Hearing results were analyzed statistically to determine differences in amplitudes of DPOAE. In addition, the cochleas of each rat were evaluated by histopathologic and immunohistochemical examination. Significant difference was not observed in cochlear hair cells in the control and corticosteroid groups, whereas severe degeneration of hair cells and increased apoptotic cells were observed in the streptomycin group. Moderate degeneration was observed in the streptomycin + corticosteroid group. The hair cells were partially intact. DP-gram of the streptomycin and streptomycin + corticosteroid groups was significantly deteriorated (P < 0.05). The coadministration of steroids with streptomycin, which has a serious ototoxic effect, did not lead to a limitation of this harmful effect.
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    The effect of hyperbaric oxygen therapy on fracture healing in nicotinized rats
    (Turkish Assoc Trauma Emergency Surgery, 2014) Demirtas, Abdullah; Azboy, Ibrahim; Bulut, Mehmet; Ucar, Bekir Yavuz; Alemdar, Celil; Alabalik, Ulas; Akpolat, Veysi
    BACKGROUND: The aim of the present study was to investigate the effect of hyperbaric oxygen therapy on fracture healing in nicotinized rats. METHODS: Thirty-two rats were divided as follows: nicotinized group (1), hyperbaric oxygen group (2), nicotinized + hyperbaric oxygen group (3), and control group (4). For 28 days, nicotine was administered in Groups 1 and 3. Then, a standard shaft fracture was induced in the left femur of rats. Groups 2 and 3 underwent hyperbaric oxygen therapy for 21 days. At the end of the experiment, fracture site, left femur and whole body bone mineral content and density were measured. RESULTS: The radiological and histopathological scores of Group 1 were statistically significantly lower compared to Groups 2, 3 and 4, and there was no statistically significant difference between the Groups 2, 3 and 4. In a comparison between the groups, no statistically significant difference was found in terms of bone mineral content and density values measured at the fracture site, left femur and whole body. CONCLUSION: The negative effects of nicotine on fracture healing are eliminated with hyperbaric oxygen therapy, but hyperbaric oxygen alone does not cause significant changes in healing (radiologically and histopathologically).
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    The Effect of Hyperbaric Oxygen Treatment on the Healing of Burn Wounds in Nicotinized and Nonnicotinized Rats
    (Oxford Univ Press, 2013) Selcuk, Caferi Tayyar; Ozalp, Burhan; Durgun, Mustafa; Tekin, Alicem; Akkoc, Mehmet Fatih; Alabalik, Ulas; Ilgezdi, Savas
    The importance of oxygen in wound healing and the negative effects of cigarette smoking have been demonstrated in various studies. In this study, our aim was to investigate the effect of hyperbaric oxygen (HBO2) treatment on wound healing in nicotinized and nonnicotinized rats. The study was conducted on 32 Sprague Dawley rats. The rats were divided into four groups, with eight rats in each: group 1, nonnicotinized rats; group 2, nonnicotinized rats treated with HBO2; group 3, nicotinized rats; and group 4, nicotinized rats treated with HBO2. To prepare the nicotinized groups, the rats were given nicotine for 28 days. At the end of day 28, standard, deep, second-degree to third-degree burns were created on the rats. The HBO2-treated groups underwent HBO2 treatment once a day for 7 days after the creation of the burn damage. All rats were killed 21 days after injury, and the burns were subjected to macroscopic, histopathological, and microbiological evaluation. During this evaluation, the smallest necrotic areas and the lowest rate of fibrosis were observed in group 2. The largest necrotic areas and the highest inflammation and fibrosis rates were observed in the nicotine-treated group 3. When the nicotinized and nonnicotinized groups were compared separately, there was a significant difference in favor of the groups treated with HBO2. Bacterial growth was the highest in the nicotinized group 3, whereas no statistically significant difference was observed among the other groups. We conclude that HBO treatment accelerates the recovery of burn wounds and provides more effective healing by reducing the development of scars both in nicotinized and nonnicotinized rats.
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    Effect of Intraperitoneal Curcumin Instillation on Postoperative Peritoneal Adhesions
    (Karger, 2015) Turkoglu, Ahmet; Gul, Mesut; Yuksel, Hatice Kurt; Alabalik, Ulas; Ulger, Burak Veli; Uslukaya, Omer; Avci, Yahya
    Objective: The aim of this study was to determine the effect of curcumin on adhesion formation in a rat cecum abrasion model. Materials and Methods: Thirty Wistar rats were randomized into three groups; the control group received saline, the curcumin group received 10 mg/kg of curcumin after cecal abrasion, and in the sham group the abdominal wall was closed without any abrasion to the cecum. On day 15, adhesions were assessed blindly using a standardized scale, and histopathological samples were taken and examined. Results: There were no incisional hernias or wound dehiscences in any animals of the three groups. A comparison of adhesion scores showed a significant difference between the curcumin (median = 1) and the control group (median = 2; p < 0.05). The grade of inflammation of the curcumin (median = 1) and the sham (median = 0) group was significantly lower than that of the control group (median = 3; p < 0.01 and p < 0.001, respectively). Hydroxyproline levels were significantly lower in the sham (48.3 +/- 11.8 mu g/mg) and the curcumin (63.8 +/- 13.9 mu g/mg) group compared to the control group (85.7 +/- 22.1 mu g/mg; p < 0.05). Conclusion: These data suggest that curcumin, administered intraperitoneally, was effective in the prevention of peritoneal adhesion formation. (C) 2014 S. Karger AG, Basel
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    Effects of caffeic acid phenethyl ester on wound healing of nasal mucosa in the rat: an experimental study
    (W B Saunders Co-Elsevier Inc, 2014) Kinis, Vefa; Ozbay, Musa; Akdag, Mehmet; Alabalik, Ulas; Gul, Aylin; Yilmaz, Beyhan; Ozkan, Hakan
    Purpose: Wound healing of the nasal mucosa is a highly complex process that restores the anatomical and functional integrity of tissue that has been exposed to trauma. In this experimental study, our aim was to use histopathological examination to investigate the effects of caffeic acid phenethyl ester on the wound healing of rat nasal mucosa after mechanical trauma. Materials and methods: The rats were randomly divided into 3 experimental groups: a non-treated group (n = 7), a control saline group (n = 7) and a caffeic acid phenethyl ester group (n = 7). The non-treated group received no treatment for 15 days. The second group was administered saline (2.5 mL/kg, intraperitoneal) once a day for 15 days. The third group received caffeic acid phenethyl ester intraperitoneally at a dose of 10 mu mol/kg once a day for 15 days. At the beginning of the study, unilateral mechanical nasal trauma was induced on the right nasal mucosa of all rats in the three groups using a brushing technique. Samples were stained using hematoxylin and eosin solution and were examined by a pathologist using a light microscope. Results: The severity of inflammation was milder in the caffeic acid phenethyl ester group compared with that in the non-treated and saline groups (P < 0.05). The subepithelial thickness index was lower in the experimental group (P < 0.05). Goblet cell and ciliated cell loss was substantially reduced in the experimental group compared with the non-treated and saline groups (P <0.05). Conclusions: Caffeic acid phenethyl ester decreases inflammation and the loss of goblet cells and ciliated cells. Therefore, caffeic acid phenethyl ester has potential beneficial effects on the wound healing of nasal mucosa in the rat. (C) 2014 Elsevier Inc. All rights reserved.
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    Effects of enoxaparin and rivaroxaban on tissue survival in skin degloving injury: an experimental study
    (Turkish Assoc Orthopaedics Traumatology, 2014) Azboy, Ibrahim; Demirtas, Abdullah; Bulut, Mehmet; Alabalik, Ulas; Ucar, Yavuz; Alemdar, Celil
    Objective: The aim of this study was to evaluate the effects of the antithrombotic agents enoxaparin, and rivaroxaban on tissue survival following skin degloving injury in an experimental rat tail model. Methods: The study included 24 rats divided into three equal groups of 8; the enoxaparin group (Group 1), the rivaroxaban group (Group 2) and the saline control group (Group 3). A degloving injury was created by making a circular incision 5 cm distal to the base of the tail; manual traction was applied to the tail skin distal to the incision. After 15 minutes, the ends of the incision were sutured back in place. Antithrombotic agents were administered immediately after suturing and repeated once a day for 15 days. At the end of Day 15, the experiment was terminated. Gross morphological tissue survival and histopathology were evaluated. Results: Histopathological examination of the enoxaparin and rivaroxaban groups revealed that the skin was mostly normal or intact with minimal inflammation. The mean length of necrotic area was significantly higher in the saline group compared to the enoxaparin and rivaroxaban groups (p < 0.05). No statistically significant differences were noted between the rivaroxaban and enoxaparin groups (p=0.451). The mean extent of skin necrosis was significantly higher in the control group than the study groups (p < 0.05), while there was no significant difference in the length of necrotic area between Group 1 and 2 (p=0.722). Conclusion: Rivaroxaban and enoxaparin improved tissue survival in skin degloving injuries in terms of gross morphological and histopathological findings in a rat tail model.
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    The Effects of Hyperbaric Oxygen Therapy Against Streptomycin Ototoxicity
    (Derman Medical Publ, 2014) Bakir, Salih; Ozbay, Musa; Kinis, Vefa; Yorgancilar, Ediz; Gun, Ramazan; Gul, Aylin; Alabalik, Ulas
    Aim: Hyperbaric oxygen (HBO) is an important adjuvant therapy and being increasingly used in the treatment of various disorders because of having an important antioxidant activity. This experimental study was designed to determine the possible protective effect of HBO therapy on streptomycininduced ototoxicity. Material and Method: Twenty-eight adult Wistar albino rats were divided into four groups: Streptomycin (n= 7), saline (n= 7), HBO (n= 7), and streptomycin plus HBO (n= 7). The HBO administered rats were placed into a large pressure chamber and received 100% oxygene at 2.5 atmosphere absolute for 60 minutes per day in a period of seven days. Rats were tested with DPOAE (Distortion Product Otoacoustic Emissions) in the beginning and the end of study. The animals in all groups were sacrificed under general anesthesia on the seventh day. Biopsy specimens from inner ear were stored for histopathologic examination with hematoxylin and eosin (H& E) under light microscopy. Results: Outer hair cells shown by light microscopic images were mostly preserved in control and HBO group. DPOAE measurements revealed no significant differences between the beginning and the end (p> 0.05). Streptomycin and streptomycin plus HBO treated rats showed loss of hair cells and auditory functions significantly (p< 0.05). Between the groups of streptomycin and streptomycin plus HBO; there was no statistically significance according to the analysis of the histopathological scores and DPgram results (p> 0.05). Discussion: HBO has probably no harmful effect on hair cells. But it seems to be not beneficial in a streptomycin-induced cochlear damage rat model.
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    The effects of intravenous immunoglobulin on cerebral ischemia in rats: An experimental study
    (Sage Publications Inc, 2016) Tunik, Selcuk; Aluclu, Mehmet Ufuk; Acar, Abdullah; Akkoc, Hasan; Guzel, Aslan; Alabalik, Ulas; Akkus, Murat
    Stroke is one of the major reasons of death in the United States and related to adult disability. Despite aggressive research, the treatment approaches of stroke still remains a major clinical problem. Intravenous immunoglobulin (IVIg) is a polyspecific Ig G preparation obtained from plasma of several thousand healthy people (donors). IVIg is an important treatment approach and used for several disorders. The aim of this study was to investigate the potentially beneficial effects of IVIg therapy in experimentally induced ischemia in middle cerebral artery occlusion (MCAo) models of rats. A total of 30 adult male Sprague Dawley rats were used. The rats were divided into two equal groups, each consisting of 15 randomly selected rats: control group (n = 15) and IVIg group (n = 15). Intraluminal filament method was used for establishment of cerebral ischemia. Intraluminal filament was withdrawn after 2 h of MCAo and reperfusion started again and passed to therapeutic stages for all the groups. Physiologic saline solution of 0.5 ml/kg was administered to the control group and 400 mg/kg IVIg was given to the IVIg group rats intravenously. In neurological evaluation, the worst score was determined as 3 and the best score as 0. After routine process, the brain tissue was prepared histopathological investigation. The IVIg group showed significantly better recovery with respect to the control group by neurological examination. The observation of specimens obtained from IVIg groups showed that findings correlate with grade 1 and -2 histopathologically. Nevertheless, ischemic amendments were observed to comply with grade 3 in ischemic areas in control group. IVIg therapy can be used in the treatment of ischemic stroke patients.
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    The effects of sulforaphane on the liver and remote organ damage in hepatic ischemia-reperfusion model formed with pringle maneuver in rats
    (Elsevier, 2015) Oguz, Abdullah; Kapan, Murat; Kaplan, Ibrahim; Alabalik, Ulas; Ulger, Burak Veli; Uslukaya, Omer; Turkoglu, Ahmet
    Background: The purpose of this study was to investigate the effect of Sulforaphane on ischemia/ reperfusion (IR) injury of the liver and distant organs resulting from liver blood flow arrest. Materials and methods: Fourty Wistar rats were assigned into four groups, each included 10 rats were used. Group I as only laparatomy, Group II laparatomy and Sulforaphane application, Group III hepatic IR; and Group IV as hepatic IR and Sulforaphane application group. Animals were subjected to liver ischemia for 30 min and then reperfusion is started. 5 mg/kg Sulforaphane was applied via oral lavage 15 minutes before initiating the experimental study. Blood samples were taken from the animals for biochemical analysis at 60th minutes of the experiment in the first and second groups; 30 minutes after beginning reperfusion in the third and forth groups. Simultaneously, liver, lung and kidney tissues were sampled for biochemical and histopathological examinations. Results: The administration of sulforaphane significantly reduced the serum TOA and liver TOA levels, increased the serum TAC and liver TAC levels and also decreased The OSI and liver OSI levels. In the histopathologic examination, the injury was reduced by the administration of sulforaphane. Administration of sulforaphane did not lead to any significant changes in any parameter including histopathological parameters in both the kidney and the lung. Conclusions: Sulforaphane reduced the liver oxidative stress from I/R injury. A histological injury in liver was reduced by sulforaphane administration. However, there were no significant effects of sulforaphane on the remote organ injuries induced by IR. (C) 2015 IJS Publishing Group Limited. Published by Elsevier Ltd. All rights reserved.
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    Evaluation of the Effect of Thymoquinone Treatment on Wound Healing in a Rat Burn Model
    (Lippincott Williams & Wilkins, 2013) Selcuk, Caferi Tayyar; Durgun, Mustafa; Tekin, Recep; Yolbas, Iyas; Bozkurt, Mehmet; Akcay, Cemal; Alabalik, Ulas
    Thymoquinone (TQ) is a plant extract that has been shown to have antimicrobial, anti-inflammatory, and antioxidant effects. Because of these activities, the authors hypothesized that TQ would reduce inflammation and oxidative stress and accelerate wound closure in a rat model of deep second-degree burns. For the purposes of this study, 40 Sprague-Dawley rats were divided into five groups of eight rats each. Group 1 was the control group, group 2 was the silver sulfadiazine group, group 3 was treated with systemic TQ, group 4 received topical TQ, and group 5 was administered topical and systemic TQ. After the deep second-degree burn damage was created, daily dressing changes and TQ administration were continued in the study groups for a period of 21 days. Systemic TQ was administered intraperitoneally at a dose of 2 mg/kg/day, whereas the topical treatment was applied using a 0.5% solution. The changes in the wound site were observed macroscopically, histopathologically, microbiologically, and biochemically in all groups. The smallest necrotic areas were observed at the end of the study in the groups that were administered a combination of systemic and topical TQ, or solely topical TQ (6.1 +/- 1.6 cm(2) and 6.7 +/- 0.4 cm(2), respectively), whereas the largest necrotic areas were observed in the control group (11.2 +/- 1.2cm(2)). The total antioxidant state levels in the control group were significantly lower than in the other groups (P < .05), whereas the total oxidative stress levels were lower in the TQ groups compared with the control group (P < .05). The lowest bacterial counts were observed in the groups treated with both topical and systemic TQ (P < .05). TQ given systemically and/or topically reduced inflammation and oxidative stress and accelerated the rate of wound closure or reepithelialization.