Yazar "Sehitoglu, Muserref Hilal" seçeneğine göre listele

Listeleniyor 1 - 20 / 27
  • [ X ]
    Öğe
    Anthocyanins: Targeting of Signaling Networks in Cancer Cells
    (Asian Pacific Organization Cancer Prevention, 2014) Sehitoglu, Muserref Hilal; Farooqi, Ammad Ahmad; Qureshi, Muhammad Zahid; Butt, Ghazala; Aras, Aliye
    It is becoming progressively more understandable that phytochemicals derived from edible plants have shown potential in modelling their interactions with their target proteins. Rapidly accumulating in-vitro and in- vivo evidence indicates that anthocyanins have anticancer activity in rodent models of cancer. More intriguingly, evaluation of bilberry anthocyanins as chemopreventive agents in twenty-five colorectal cancer patients has opened new window of opportunity in translating the findings from laboratory to clinic. Confluence of information suggests that anthocyanins treated cancer cells reveal up-regulation of tumor suppressor genes. There is a successive increase in the research-work in nutrigenomics and evidence has started to shed light on intracellular-signaling cascades as common molecular targets for anthocyanins. In this review we bring to limelight how anthocyanins induced apoptosis in cancer cells via activation of extrinsic and intrinsic pathways.
  • [ X ]
    Öğe
    Association of abnormal coronary sinus reflux with coronary slow flow and importance of the Thebesian valve
    (Elsevier Ireland Ltd, 2020) Aksit, Ercan; Barutcu, Ahmet; Sehitoglu, Muserref Hilal; Kirilmaz, Bahadir; Arslan, Mehmet; Gazi, Emine; Tok, Ozge Ozden
    Background: The relationship between coronary slow flow (CSF) and coronary sinus (CS) reflux has not been previously studied. This study aimed to investigate the relationship between CSF and CS reflux and Thebesian valve presence as well as the relationship between CS reflux and serum annexin-V and ICAM-1 levels. Methods: In this case-control study, patients were divided into two groups: CSF (n = 13) and control (n = 7) groups. CS flow parameters and Thebesian valve presence were evaluated by cardiac magnetic resonance (CMR). Moreover, serum ICAM-1 and annexin-V levels were measured. Results: Regurgitation volume and regurgitation fraction, indicators of reflux flow in CS, were higher in the CSF group than in the control group (p = 0.039 and p = 0.019). Fewer Thebesian valves were observed in the CSF group than in the control group (p = 0.022). Furthermore, a positive correlation was found between regurgitation volume and regurgitation fraction and serum annexin-V and ICAM-1 levels (r = 0.813, p < 0.001 and r = 0.996, p < 0.001; r = 0.817, p < 0.001 and r = 0.993, p < 0.001, respectively). Conclusions: This study revealed the significant relationship between CSF and reflux flow in CS. The fact that the patients in the CSF group have fewer Thebesian valves suggests the importance of the valve in preventing backward flow from the coronary vein. A positive correlation between serum ICAM-1 and annexin-V levels with regurgitation volume and regurgitation fraction indicates that after a certain threshold, CS reflux should be considered an abnormal condition. (C) 2020 Elsevier B.V. All rights reserved.
  • [ X ]
    Öğe
    Correction to: The Neuroprotective Effect of Coumaric Acid on Spinal Cord Ischemia/Reperfusion Injury in Rats (Inflammation, (2015), 38, 5, (1986-1995), 10.1007/s10753-015-0179-0)
    (Springer, 2025) Guven, Mustafa; Sehitoglu, Muserref Hilal; Yuksel, Yasemin; Tokmak, Mehmet; Aras, Adem Bozkurt; Akman, Tarik; Golge, Umut Hatay
    The authors have noticed that there is a mistake in the material method of the article. While writing the surgical procedure of the ischemia, the time was mistakenly written as 20 minutes in 2, 3 and 4 groups, in the Material and Method section. The correct period of time should be 45 minutes in 2, 3 and 4 groups in the article. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.
  • [ X ]
    Öğe
    Effect of Quercetin on Colonic Anastomosis Wound Healing
    (Wiley-Blackwell, 2015) Demir, Ufuk; Edremitlioglu, Mustafa; Kandas, Emel; Sehitoglu, Muserref Hilal
    [Anstract Not Available]
  • [ X ]
    Öğe
    Effects of Aloe Vera on Spinal Cord Ischemia-Reperfusion Injury of Rats
    (Taylor & Francis Inc, 2016) Yuksel, Yasemin; Guven, Mustafa; Kaymaz, Burak; Sehitoglu, Muserref Hilal; Aras, Adem Bozkurt; Akman, Tarik; Tosun, Murat
    Aim: The purpose of this study was to evaluate the possible protective/therapeutic effects of aloe vera (AV) on ischemia-reperfusion injury (I/R) of spinal cord in rats. Materials and Methods: A total of 28 Wistar Albino rats were divided into four random groups of equal number (n = 7). Group I (control) had no medication or surgery; Group II underwent spinal cord ischemia and was given no medication; Group III was administered AV by gastric gavage for 30days as pre-treatment; Group IV was administered single dose intraperitoneal methylprednisolone (MP) after the ischemia. Nuclear respiratory factor-1 (NRF1), malondialdehyde (MDA) and superoxide dismutase (SOD) levels were evaluated. Tissue samples were examined histopathologically and neuronal nitric oxide synthase (nNOS) and nuclear factor-kappa B (NF-B) protein expressions were assessed by immunohistochemical staining. Results: NRF1 and SOD levels of ischemia group were found to be lower compared to the other groups. MDA levels significantly increased after I/R. Treatment with AV and MP resulted in reduced MDA levels and also alleviated hemorrhage, edema, inflammatory cell migration and neurons were partially protected from ischemic injury. When AV treatment was compared with MP, there was no statistical difference between them in terms of reduction of neuronal damage. I/R injury increased NF-B and nNOS expressions. AV and MP treatments decreased NF-B and nNOS expressions.Conclusions: It was observed that aloe vera attenuated neuronal damage histopathologically and biochemically as pretreatment. Further studies may provide more evidence to determine the additional role of aloe vera in spinal cord ischemia reperfusion injury.
  • [ X ]
    Öğe
    Evaluation of Serum Tumor Necrosis Factor-alpha-Induced Adipose-Associated Protein (TIARP/STEAP4) Level and Its Association with Disease Activity in Patients with Psoriasis: ASingle-Center Prospective Comparative Study
    (Galenos Publ House, 2024) Kaya, Ozge; Keskinkaya, Zeynep; Sehitoglu, Muserref Hilal; Mermutlu, Selda Isik; Kilic, Sevilay Oguz
    Aim: Tumor necrosis factor-alpha (TNF-alpha)-induced adipose-associated protein (TIARP/STEAP4) is a protective metalloreductase against oxidative stress that is induced by various proinflammatory cytokines, including TNF-alpha and interleukin-17. This study aimed to evaluate whether STEAP4 is elevated in patients with psoriasis and whether it is associated with disease activity. Materials and Methods: In this prospective cross-sectional single-center study, serum STEAP4 levels measured by the ELISA method in serum samples collected from psoriasis patients and healthy individuals. The association between STEAP4 levels and demographic characteristics and clinical findings in patients with psoriasis was further evaluated. Results: Forty-one psoriasis patients with a female: male ratio of 1:1 and a median age of 44 years and 40 controls were included in the study. The median STEAP4 level of the patients with psoriasis (9.25) was significantly higher than that of the control group (1.04) (P < 0.001). Although STEAP4 levels did not differ significantly in patients with psoriasis regarding sex, joint, and nail involvement, no significant correlation was found with age, age at disease onset, disease duration, and severity. Conclusion: The high levels of STEAP4 detected in patients with psoriasis might reflect its anti-inflammatory effects on Th-1 and Th-17 responses and on neutrophil and macrophage infiltration. On the other hand, a possible genetic variation or defect at the receptor level for STEAP4 in patients with psoriasis might hamper an adequate anti-inflammatory effect and lead to increased STEAP4 expression as a compensation mechanism. The present study not only indicates that STEAP4 might play a role in the pathogenesis of psoriasis but also suggests potential implications for its role in treatment and follow-up, which offers a promising direction for further investigation.
  • [ X ]
    Öğe
    Healing Effects of L-Carnitine on Colon Anastomosis Wound on Experimental Colon Anastomosis
    (Wiley-Blackwell, 2015) Kandas, Emel; Edremitlioglu, Mustafa; Demir, Ufuk; Erbil, Guven; Sehitoglu, Muserref Hilal
    [Anstract Not Available]
  • [ X ]
    Öğe
    Humic Acid Has Protective Effect on Gastric Ulcer by Alleviating Inflammation in Rats
    (Pleiades Publishing Inc, 2022) Sehitoglu, Muserref Hilal; Oztopuz, Ozlem; Karaboga, Ihsan; Ovali, Mehmet Akif; Uzun, Metehan
    The new agents are needed in treatment of gastric ulcer that have less side effects, adequate efficacy, and no drug interactions. In this study, we aimed to investigate the potential protective effects of humic acid on experimental gastric ulcer. Wistar Albino male rats (n = 48) were randomly divided into 8 groups as follow; Control (without any applications), Humic acid (50 mg/kg), ethanol group (1 mL/rat), and indomethacin group (25 mg/kg). In the treatment groups, both gastric ulcer model and humic acid 50 mg/kg were applied. In addition, famotidine the antiulcer drug was used as positive control. All medications were administered by oral gavage. Levels of ADAM10 and ADAMTS12 in gastric mucosa were determined by ELISA method. Hematoxylin-Eosin (H&E) staining, iNOS, and PCNA immunohistochemical staining were performed for histopathological investigations. Apoptosis was demonstrated by using the TUNEL method. In addition, the levels of inflammatory cytokines (TNF-alpha, IL-6, IL-10) and caspase-3 gene were determined by qRT-PCR. ADAM10 and ADAMTS12 levels significantly increased in the treatment groups compared to the ulcer groups (p < 0.05). The experimental groups showed mucosal erosion, bleeding, leukocyte infiltration and edema. Treatment with humic acid and famotidine was found to suppress iNOS activity, thereby decreasing proinflammatory activity and preventing damage to the gastric mucosa, while reducing the number of apoptotic cells. IL-6, IL-10, TNF-alpha and caspase-3 levels were significantly decreased in the treatment groups compared to damaged gastric mucosa. As a result, humic acid may be defined as a potential protective agent with its anti-inflammatory effect in gastric ulcer.
  • [ X ]
    Öğe
    Hyperbaric oxygen treatment ameliorates gentamicin-induced nephrotoxicity and expression of kidney injury molecule 1 in the rat model
    (Undersea & Hyperbaric Medical Soc Inc, 2019) Oztopuz, Ozlem; Turkon, Hakan; Sehitoglu, Muserref Hilal; Buyuk, Basak; Uzun, Metehan; Ovali, Mehmet Akif; Demir, Ufuk
    In recent years, hyperbaric oxygen (HBO2) therapy has been considered as an effective method for the treatment of gentamicin (GM)-induced renal toxicity. However, the findings related to the use of HBO2 for GM toxicity are limited and contradictory. The aim of this study is to investigate the protective role of HBO2 on GM-induced nephrotoxicity. For this purpose, Wistar albino rats (n=28) were randomly divided into four equal groups: C, HBO2, GM and GM+HBO2. GM (100 mg/kg, ip) and HBO2 were applied over seven days. On the eighth day blood and kidney tissue samples were harvested. The albumin, creatinine, and urea levels were determined from serum samples. Superoxide dismutase (SOD), glutathion peroxidase (GSH-Px) activities, malondialdehyde (MDA), total antioxidant status (TAS) and total oxidant status (TOS) values were analyzed spectrophotometrically. The relative expression level of TNF-alpha, IL-1 beta and Kim-1 gene were determined by qRT-PCR assays; histopathologic investigation was completed in kidney tissue samples. Serum urea, albumin and creatinine levels significantly increased in the GM group compared to the GM+HBO2 group. For antioxidant parameters the GM+HBO2 group was not statistically different from the C group but was significantly different compared with the GM group. TNF-alpha, IL-1 beta and Kim-1 gene expression levels in the GM group were statistically increased compared to the GM+HBO2 group (p=0.015, p=0.024, p=0.004) respectively. Severe tubular necrosis, epithelial desquamation and mild peritubular hemorrhage were observed in the GM-administrated group, while HBO2 exposure ameliorated these alterations. In conclusion, HBO2 exposure may be defined as a potential method for the prevention of GM-induced renal toxicity.
  • [ X ]
    Öğe
    Increased Levels of Serum Ischemia Modified Albumin in Patients with Ankylosing Spondylitis
    (Clin Lab Publ, 2016) Turkon, Hakan; Gokmen, Ferhat; Cakir, Dilek Ulker; Sehitoglu, Muserref Hilal; Resorlu, Hatice; Doner, Davut; Essizoglu, Ertan
    Background: The aim of the study was to investigate oxidant/antioxidant status by determining serum ischemia-modified albumin (IMA) levels with oxidative/antioxidant parameters in patients with ankylosing spondylitis (AS) compared to the controls. Methods: The serum concentrations of IMA, IMA/albumin ratio (IMAR), malondialdehyde (MDA), total oxidant status (TOS), oxidative stress index (OSI), superoxide dismutase (SOD), glutathione peroxidase (GPx), and total antioxidant capacity (TAC) were measured in 40 AS patients and 35 healthy controls. Results: Mean serum IMA, IMAR, MDA, TOS, and OSI levels were increased in patients with AS when compared to the control group (p < 0.05 for all). Serum levels of SOD and GPx were significantly lower in the patient group than in the healthy subjects (p < 0.001 for both). Serum TAC levels were decreased in patients with AS compared to the controls but the statistical difference was not significant. Serum IMA levels were found to be positively correlated with BASDAI, BASFI, BASMI, and ASDAS-CRP (r = 0.356, r = 0.370, r = 0.412, r = 0.353, respectively, and p < 0.05 for all). IMAR values showed significant correlations with BASFI, BASMI, and ASDAS-CRP (r = 0.351, p = 0.026; r = 0.400, p = 0.010; and r = 0.379, p = 0.016, respectively). Conclusions: Depletion in antioxidant systems and overproduction of free radicals leading to formation of the oxidative stress may play a role in the development of AS. Increased levels of IMA might provide important contributions to the underlying oxidative stress in AS.
  • [ X ]
    Öğe
    Melatonin ameliorates sodium valproate-induced hepatotoxicity in rats
    (Springer, 2020) Oztopuz, Ozlem; Turkon, Hakan; Buyuk, Basak; Coskun, Ozlem; Sehitoglu, Muserref Hilal; Ovali, Mehmet Akif; Uzun, Metehan
    Valproic acid (VPA) is a anticonvulsant and mood-stabilizing agent used to treat epilepsy in patients of all ages. However, it can cause hepatotoxicity with increased oxidative stress. Melatonin (MEL) is known as antioxidant and antiinflammatory agent. Therefore, the present study designed to investigate the probable protective role of melatonin against VPA-induced liver toxicity. For that purpose, 28 Wistar rats were randomly selected and divided into four groups, namely the Group C (vehicle), VPA (500 mg/kg/day VPA), MEL + VPA (10 mg/kg/day melatonin + 500 mg/kg/day VPA) and MEL (10 mg/kg/day melatonin). The agents were given by oral gavage for 14 days. Blood and liver tissue samples from all the rats were harvested on the 15th day of experiment. Biochemical analyses were conducted on the blood samples. The levels of malondialdehyde (MDA), superoxide dismutase (SOD), alpha glutathione S-transferases (alpha-GST), nuclear factor-kappa B (NF-kappa B), myeloperoxidase (MPO) and changes in gene expression were examined in the liver tissues. Also, liver histopathological analyses were conducted. VPA administration significantly increased the levels of alpha-GST, MDA, NF-kappa B and of IL-1 beta, TNF-alpha gene expression in the liver compared to Group C. Moreover, vacuolization, hydropic degeneration, inflammatory cell infiltration, and sinusoidal congestion were commonly detected in the VPA-treated group along with the highest apoptotic index (TUNEL staining) values. Melatonin administration was revealed to exhibit powerful protective properties at cellular, inflammatory and oxidative level activities against VPA-induced liver toxicity. Therefore, melatonin administration may be used as an adjuvant therapy against to VPA-induced liver toxicity.
  • [ X ]
    Öğe
    Ozone treatment for high-dose systemic Steroid-Induced retinal injury
    (Taylor & Francis Ltd, 2020) Yildiz, Aydin; Sehitoglu, Muserref Hilal; Karaboga, Ihsan; Arikan, Sedat
    Objective To investigate the effect of high-dose systemic steroids on retinal tissues and the effectiveness of ozone (O-3) therapy. Methods Twenty-four New Zealand white rabbits were divided into three groups of eight. Group 1 was accepted as the control group, Group 2 received intramuscular 20 mg/kg methylprednisolone acetate and Group 3 received 14 sessions of ozone treatment in addition to methylprednisolone acetate. The subjects were sacrificed on the 30(th)day. Retinal tissues were removed. Superoxide dismutase (SOD), catalase (CAT), malondialdehyde (MDA), total antioxidant status (TAS) and total oxidant status (TOS) levels were evaluated for tissue biochemistry and serum ischaemic modified albumin (IMA), interleukin-6 (IL-6) and tumour necrosis factor-alpha (TNF-alpha) levels were evaluated with the ELISA method. Haematoxylin-eosin staining and TUNEL evaluation for apoptosis were evaluated as histopathological methods. Results In the treatment group, antioxidant parameters of TAS, SOD and CAT were higher, oxidative and ischaemic parameters of MDA, TOS and IMA were lower, inflammatory parameters of IL-6 and TNF-alpha were lower, retinal thickness was better and apoptosis amount was lower. Conclusion Apoptosis increases in retinal tissues due to high dose systemic steroid administration and the retina becomes thinner. With biochemical examination, oxidation parameters increased while antioxidant parameters decreased. Both histopathological and biochemical parameters improved significantly with ozone treatment.
  • [ X ]
    Öğe
    Protective effect of gel form of gastric gavage applicated aloe vera on ischemia reperfusion injury in renal and lung tissue
    (C M B Assoc, 2017) Sahin, Hasan; Yener, Ali Umit; Karaboga, Ihsan; Sehitoglu, Muserref Hilal; Dogu, Tugba; Altinisik, Hatice Betul; Altinisik, Ugur
    The aloe vera plant has become increasingly popular in recent years. This study aimed to research the effect of aloe vera to prevent renal and lung tissue damage in an experimental ischemia-reperfusion (I/R) injury model. The study included 21 male Wistar Albino rats, which were categorized into control group, n = 7 (no procedures), Sham group n = 7 (I/R); and aloe vera therapy group, n = 7 (aloe vera and I/R). Superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), and malondialdehyde (MDA) were evaluated from lung and kidney tissues for biochemical investigations. As histopathological, hematoxylin and eosin and anti-iNOS were also examined. In biochemical investigations, SOD, CAT, and GPx levels of the Sham group were found to be lower compared with the other groups (P < 0.05). The aloe vera therapy group was not statistically different from control groups but significantly different compared with the Sham group. In the same way, the MDA levels of kidney and lung tissues were statistically significant in the aloe vera therapy group, compared to the Sham group. In the Sham group, the peribronchial and perialveolar edema were observed in lung parenchyma. Also, excess interstitial hemorrhage, leukocyte infiltration, and alveolar wall thickening were identified in ischemic groups. The histopathological changes were much lighter than in the aloe vera therapy group. In renal tissues, excess epithelial cell deterioration, tubular desqumination, and glomerular atrophy were observed in the Sham group. The histopathological changes were markedly reduced in the aloe vera therapy group. In the kidney and lung tissue, the level of iNOS activity in the Sham group was significantly higher than in the control and aloe vera therapy group. This study indicated that aloe vera is protective against oxidative damage formed by I/R in distant organs like the lungs and kidneys.
  • [ X ]
    Öğe
    Quercetin associated with dimethylsulfoxide has a curative effect on experimental colon anastomosis injury
    (Acta Cirurgica Brasileira, 2020) Demir, Ufuk; Edremitlioglu, Mustafa; Kanda, Emel; Sehitoglu, Muserref Hilal; Kilinc, Nihal
    Purpose: To examine the effects of quercetin on healing of experimental colon anastomosis injury in early and late period. Methods: Eighty male Wistar-Albino rats were divided into 8 groups. For all groups, left colons of the rats were resected and for the rest end-to-end anastomosis was performed. Two of the groups for which the experiment protocol was ended on the 3rd and 7th day following the anastomosis were not administered with either quercetin or dimethylsulfoxide DMSO, whereas two other groups were administered with DMSO only, and four other groups were administered with quercetin dissolved in DMSO in doses of 20 and 100 mg/kg during the protocol. At the end of the study, anastomosis line was resected, histopathological evaluation was performed and bursting pressure, malondialdehyde, superoxide dismutase, catalase, and hydroxyproline levels were measured. Results: Quercetin significantly increased hydroxyproline, superoxide dismutase, catalase levels, histopathological healing score, bursting pressure values and decreased malondialdehyde level in early period. It also significantly increased superoxide dismutase, catalase, and hydroxyproline levels and decreased malondialdehyde level in late period. Conclusion: it was seen that quercetin speeds up the injury healing process and reveals an antioxidant effect, specifically in early period.
  • [ X ]
    Öğe
    The ameliorative effect of ozone therapy on spinal cord ischemia in rabbits
    (Bayrakol Medical Publisher, 2020) Akman, Tarik; Aras, Adem Bozkurt; Simsek, Tuncer; Sehitoglu, Muserref Hilal; Yukser, Yasemin; Aslan, Esra; Akman, Canan
    Aim: Research in applications of O3 treatment for spinal cord ischemia is a rich area of study. The effects of O3 treatment on spinal cord ischemia have not been studied much to date. The aim of this study is to investigate the role of prophylactic administration of O3 on the recovery of ischemic changes in terms of oxidative stress markers in lysosomal and mitochondrial enzymatic activities in the spinal cord of male rabbits. Material and Method: Twenty-four New Zealand White (NZW) adult male rabbits (weight: 2.5-3 kg) were obtained from Saki Yenilli Experimental Animals Center (Ankara, Turkey). The rabbits were housed in plastic cages at a temperature of 21 +/- 2 degrees C, with 12 hours light/12 hours dark cyclus, fed with standard rabbit diet (Bil-Yem Ltd. Co., Ankara, Turkey) and water ad libitum for the duration of the experiment. Rabbits were randomly divided into 4 groups of 6 rabbits. The first group was accepted as control and the second group was treated with 50 mu g/mL (20 mL) ozone by rectal insufflation 5 times per day. On the 10th day, animals were sacrificed. The third sham group had infrarenal abdominal aorta cross- clamping (IAACC) performed and were sacrificed 24 hours later. The fourth group was treated with 50 mu g/mL ozone (20 mL) by rectal insufflation 5 times per day and on the 10th day, IAACC was performed. Twenty-four hours later the animals were sacrficed. Results: When data obtained from the biochemical analysis were investigated (Table 1) in the groups with induced ischemia, the expected reduction in SOD, CAT, and GPX enzyme activities was observed and an increase in MPO activity was observed. The statistical difference between ozone administered groups and the control group was significant (p < 0.05). When the ischemia+ozone group is compared with the ischemia group, the results are significant and a statistical difference is observed (p < 0.05). When GPX values in the group with ischemia-induced were investigated, the enzyme activity values were very low. A serious increase was observed in the ozone administered treatment group (p < 0.05). Discussion: Ozone (O3) is a molecule carrying three oxygen atoms forming as a result of exposure of oxygen to high energy electric currents and ultraviolet (UV) light in nature. It is found as a gas at room temperature. It is colorless, and has a characteristic smell. As ozone has a high degree of oxidation strength, it is called active oxygen in medicine. Due to its ability to increase blood circulation, it is used for treatment, not just of disorders related to circulation, but as an aid to the renewal of organic functions disrupted by many diseases.
  • [ X ]
    Öğe
    The Axon Protective Effects of Syringic Acid on Ischemia/eReperfusion Injury in a Rat Sciatic Nerve Model
    (Turkish Neurosurgical Soc, 2017) Tokmak, Mehmet; Sehitoglu, Muserref Hilal; Yuksel, Yasemin; Guven, Mustafa; Akman, Tarik; Aras, Adem Bozkurt; Yaka, Umut
    AIM: In the relevant literature, there is no experimental study that investigated the axon protective effects of syringic acid- a polyphenol compound- with an anti-oxidant capacity on ischemia/reperfusion injury. MATERIAL and METHODS: The rats were randomly divided into four groups: Control group (no medication or surgical procedure), Sham group, Syringic acid group, and Methyprednisolone (MP) Group. lschemia was achieved by abdominal aorta clamping and all animals were sacrificed 24 hours after ischemia. Harvested sciatic nerve segments were investigated histopathologically and for tissue biochemistry. RESULTS: lschemic fiber degeneration scores were found significantly lower in syringic acid and MP groups than sham group. Additionally, apoptosis-related cysteine peptidase caspase-3 immunostaining scores were lower in syringic acid and MP groups. Biochemically, superoxide dismutase and nuclear respiratory factor 1 values were significantly higher in syringic acid group compared to those of control and sham groups while malondialdehyde levels were significantly lower in the syringic acid group. CONCLUSION: Syringic acid reduces oxidative stress and axonal degeneration in rat sciatic nerve after ischemia/reperfusion injury. Therefore, syringic acid may play a role in the treatment of peripheral nerve injuries due to ischemia/reperfusion.
  • [ X ]
    Öğe
    The effect of aloe vera on ischemia-Reperfusion injury of sciatic nerve in rats
    (Elsevier France-Editions Scientifiques Medicales Elsevier, 2016) Guven, Mustafa; Golge, Umut Hatay; Aslan, Esra; Sehitoglu, Muserref Hilal; Aras, Adem Bozkurt; Akman, Tarik; Cosar, Murat
    Purpose: Aloe vera is compound which has strong antioxidant and anti-inflammatory effects. We investigated the neuroprotective role of aloe vera treatment in rats with experimental sciatic nerve ischemia/reperfusion injury. Methods: Twenty-eight male Wistar Albino rats were divided equally into 4 groups. Groups; Control group (no surgical procedure or medication), sciatic nerve ischemia/reperfusion group, sciatic nerve ischemia/reperfusion + aloe vera group and sciatic nerve ischemia/reperfusion + methylprednisolone group. Ischemia was performed by clamping the infrarenal abdominal aorta. 24 hours after ischemia, all animals were sacrificed. Sciatic nerve tissues were also examined histopathologically and biochemically. Results: Ischemic fiber degeneration significantly decreased in the pre-treated with aloe vera and treated with methylprednisolone groups, especially in the pre-treated with aloe vera group, compared to the sciatic nerve ischemia/reperfusion group (p < 0.05). A significant decrease in MDA, an increase in NRF1 level and SOD activity were observed in the groups which obtained from the AV and MP groups when compared to the sciatic nerve ischemia/reperfusion group. When all results were analysed it was seen that the aloe vera group was not statistically different compared to the MP group (p > 0.05). Conclusions: Aloe vera is effective neuroprotective against sciatic nerve ischemia/reperfusion injury via antioxidant and anti-inflammatory properties. Also aloe vera was found to be as effective as MP. (C) 2016 Elsevier Masson SAS. All rights reserved.
  • [ X ]
    Öğe
    The Effect of Coumaric Acid on Ischemia-Reperfusion Injury of Sciatic Nerve in Rats
    (Springer/Plenum Publishers, 2015) Guven, Mustafa; Yuksel, Yasemin; Sehitoglu, Muserref Hilal; Tokmak, Mehmet; Aras, Adem Bozkurt; Akman, Tarik; Golge, Umut Hatay
    The aim of the study was to determine the effect of coumaric acid on sciatic nerve ischemia/reperfusion (SNI) injury in rats. The rats were randomly divided into four groups: control group (no medication or surgical procedure), SNI group, SNI + coumaric acid (CA) group, and SNI + methylprednisolone (MP) group. Ischemia was achieved by abdominal aorta clamping, and all animals were sacrificed 24 h after ischemia. Harvested sciatic nerve segments were investigated histopathologically and for tissue biochemistry. A significant decrease in MDA, an increase in NRF1 levels, and increase in SOD activity were observed in the groups which received coumaric acid and methylprednisolone when compared to the corresponding untreated group (p < 0.05). Ischemic fiber degeneration significantly reduced in the SNI + CA and SNI + MP groups, especially in the SNI + MP group, compared to the SNI group (p < 0.05). Beta amyloid protein expressions were significantly decreased in the SNI + CA group compared to the SNI group (p < 0.05). Our study revealed that coumaric acid treatment after ischemia/reperfusion in rat sciatic nerves reduced oxidative stress and axonal degeneration. Therefore, coumaric acid may play a role in the treatment of peripheral nerve injuries due to ischemia/reperfusion.
  • [ X ]
    Öğe
    The effects of apomorphine on paracetamol-induced hepatotoxicity in rats
    (C M B Assoc, 2017) Sehitoglu, Muserref Hilal; Yayla, Muhammet; Kiraz, Asli; Oztopuz, Rahime Ozlem; Bayir, Yasin; Karaca, Turan; Khalid, Sumbul
    It is becoming progressively more understandable that overdose of paracetamol in both humans and animals causes severe hepatotoxicity. Apomorphine is known as a neuroprotective agent. Due to the protective effect, apomorphine had been tested in experimental studies on different models. Findings obtained through series of expriments suggested that apomorphine may also be useful in liver toxicity. The aim of this study is to investigate the relationship among the hepatoprotective mechanism of apomorphine and to determine the possible role of apomorphine on paracetamol-induced hepatotoxicity in rats. 30 Sprague Dawley rats (adult male) were distributed into 5 groups. Group 1 was the control group and did not receive any medication. Group 2 received only paracetamol 2 g/kg by intragastric gavage to induce hepatotoxicity. Groups 3 and 4 were given apomorphine 1 mg/kg and 2 mg/kg by intraperitoneal injection, respectively. Groups 3 and 4 were given 2g/kg of Paracetamol. In Group 5, rats were treated with 2 mg/kg of apomorphine. Drug-treated rats were given food for the next 24 h until they were sacrified. Moreover, we also performed AST, ALT measurements in serum, MDA and SOD levels in liver tissues and histopathological analysis of the liver in all groups. Apomorphine had positive effects on both liver enzymes, oxidative stress markers and histopathological results in paracetamol-induced hepatotoxicity. Additionally, apomorphine at 2 mg/kg dose was significantly more protective as compared to 1 mg/kg as evidenced by the histopathological examination results. It was thought that apomorphine was found hepatoprotective on paracetamol-induced hepatotoxicity, especially at higher doses such as 2 mg/kg.
  • [ X ]
    Öğe
    The hepatoprotective effect of Aloe vera on ischemia-reperfusion injury in rats
    (Kare Publ, 2019) Sehitoglu, Muserref Hilal; Karaboga, Ihsan; Kiraz, Asli; Kiraz, Hasan Ali
    OBJECTIVE: Aloe vera is known for its antioxidant properties. In this experimental study, we aimed to investigate the efficacy of Aloe vera in ischemia-reperfusion (I/R) liver injury in rats. METHODS: Male Wistar Albino rats were divided into three groups, where the sham group (n=7) underwent no medication or surgical procedures, the I/R group (n=7) was the control group that received 45 minutes of applied abdominal aorta ischemia and rats were sacrificed 24 hours after reperfusion, and the I/R+AV group (n=7) was the treatment group that was given Aloe vera (30 mg/kg) every day followed by gastric lavage for a month before applying ischemia and performing sacrifice as in the previous group. Before sacrifice, all the liver tissues were removed. Tissues were examined for histopathological investigation, iNOS immunoreactivity and tissue biochemistry, malondialdehyde (MDA), catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GSH-Px) activities. RESULTS: The SOD, CAT, and GSH-Px levels of the I/R+AV group were not significantly different from the sham group (p>0.05) but were significantly higher when compared to the I/R group. MDA levels of liver tissues were significantly lower (p<0.05) in the I/R+AV group as compared to the I/R group. Disrupted hepatic cords, sinusoidal dilatation, hemorrhage, cytoplasmic vacuolization of hepatocytes, and intensive iNOS immunoreactivity were detected in the I/R group. Decreased histopathological change score and iNOS immunoreactivity score were noticed in the I/R+AV group as compared to the I/R group. CONCLUSION: It was found that Aloe vera showed a hepatoprotective effect against I/R injury. Further research is required to determine the effective dose, administration method, and effects of Aloe vera for liver transplantation.