Person: ERTAŞ, BÜŞRA
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ERTAŞ
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BÜŞRA
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Publication Metadata only Myrtus communis leaf extract protects against cerulein-induced acute pancreatitis in rats(WILEY, 2020) ŞEN, ALİ; Ozbeyli, Dilek; Sen, Ali; Kaya, Ozlem Tugce Cilingir; Ertas, Busra; Aydemir, Sezgin; Ozkan, Naziye; Yuksel, Meral; Sener, GokselIn this study, the aim was to examine the potential protective effects of Myrtus communis subsp. communis leaf ethanol extract (MC) treatment against acute pancreatitis (AP) in rats. Thirty-two rats were grouped as the saline-pretreated control (C), MC-pretreated control (MC), saline-pretreated AP (AP), and MC-pretreated AP (MC + AP) groups. To induce AP, cerulein was administered (50 mu g/kg) two times. The rats were given MC for 14 days before cerulein injection. Six hours after the final cerulein injection, the rats were sacrificed. Pancreatic damage was associated with an increase in the serum activity of lipase and amylase, the pancreatic activity of myeloperoxidase, and the pancreatic level of malondialdehyde, interleukin-1 beta, and interleukin-6. AP also led to a decrease in the pancreatic level of anti-inflammatory interleukin-10 and glutathione. Pretreatment with MC before the induction of AP significantly reduced the pancreatic damage observed during the histological examination as well as reversed the biochemical changes evoked by AP. Practical applications Acute pancreatitis is characterized by high mortality (average about 5%; severe cases may reach about 30%). The current treatment for acute pancreatitis is mainly symptomatic. The introduction of herbal drugs may lead to the development of a new strategy in the treatment of this disease. This study revealed that MC reduced pancreatic injury by decreasing pro-inflammatory cytokines, increasing antioxidant capacity and anti-inflammatory cytokine, IL-10. To the authors' knowledge, this research is the first report showing that MC inhibits the development of AP. This observation suggests that MC may be useful in the prevention and the treatment of AP in clinical settings.Publication Metadata only Evaluation of the protective effect of Myrtus communis in scopolamine induced Alzheimer model through cholinergic receptors(ELSEVIER, 2019) ŞEN, ALİ; Aykac, Asli; Ozbeyli, Dilek; Uncu, Murat; Ertas, Busra; Kilinc, Olca; Sen, Ali; Orun, Oya; Sener, GokselAlzheimer's disease is a progressive neurodegenerative disorder causing common health problem with increasing age. Evidences show that the key symptoms of AD are mainly caused by cholinergic system dysfunction which has a role in cognitive disorders. Cholinergic pathways especially muscarinic receptors like M-1 subtype also have a major role in learning, memory, cognitive functions and emotional state. There is no available permanent treatment currently to cure AD or to change its progression. This study was designed to investigate the factors that play important role in pathogenesis of AD and to compare the effects of Galantamine treatment with effects of Myrtus communis treatment. The expression level of M-1, ACh, BDNF; AChE activity, GSH level, MDA and MPO activity and AChE gene expression were investigated in scopolamine-induced rat model. Results showed that, administration of MC significantly improves the SCOP-induced reduction of latency and object recognition time; increasing BDNF, M-1 and ACh receptor expression levels in the different brain regions. Additionally, MC showed an increased in AChE by enhancing GSH activity and reducing MDA level and MPO activity. In conclusion MC considered as a possible novel therapeutic approach that can be a valuable alternative way in the prevention and treatment of AD.Publication Open Access Protective effects of Rubus tereticaulis leaves ethanol extract on rats with ulcerative colitis and bio-guided isolation of its active compounds: A combined in silico, in vitro and in vivo study(2022-11-01) ŞEN, ALİ; ÖZBEYLİ, DİLEK; ERTAŞ, BÜŞRA; DOĞAN, AHMET; BİTİŞ, LEYLA; Şen A., Özbeyli D., Teralı K., Göger F., Yıldırım A., Ertaş B., Doğan A., Bitiş L., Şener G.The aim of this study was to evaluate the therapeutic effect of active ethanol extract obtained from the leaves of Rubus tereticaulis (RTME) against colitis, and to purify major compounds from this extract by bioassay-directed isolation. Rats with colitis induced via intra-rectal acetic acid administration (5%, v/v) received RTME or sulfasalazine for three consecutive days. On day four, all rats were decapitated, and the colonic tissue samples were collected for macroscopic score, colon weight, reduced glutathione (GSH), myeloperoxidase (MPO), and malondialdehyde (MDA) analyses. The active compounds and chemical composition of RTME were determined by bio-guided isolation and LC-MS/MS, respectively. Compared to the colitis group, the rats treated with RTME displayed significantly lowered macroscopic scores and colon wet weights (p < 0.001). These effects were confirmed biochemically by a decrease in colonic MPO activity (p < 0.001), MDA levels (p < 0.001), and an increase in GSH levels (p < 0.001). Kaempferol-3-O-β-d-glucuronide (RT1) and quercetin-3-O-β-d-glucuronide (RT2) were found to be the major compounds of RTME, as evidenced by in vitro anti-inflammatory and antioxidant activity-guided isolation. Their anti-inflammatory/antioxidant activities were also predicted by docking simulations. Additionally, quinic acid, 5-caffeoylquinic acid, quercetin pentoside, quercetin glucoside, quercetin-3-O-β-d-glucuronide, kaempferol-3-O-β-d-glucuronide, and kaempferol rutinoside were identified in RTME via using LC-MS/MS. RT2, along with other compounds, may be responsible for the observed protective action of RTME against colitis. This study represents the first report on the beneficial effects of RTME in an experimental model of colitis and highlights the potential future use of RTME as a natural alternative to alleviate colitis.Publication Metadata only Myrtus communis extract ameliorates high-fat diet induced brain damage and cognitive function(MARMARA UNIV, 2020) ŞEN, ALİ; Ozbeyli, Dilek; Yarimbas, Gizem; Ertas, Busra; Sen, Ali; Sakarcan, Selin; Sener, GokselObesity causes cognitive weakening and increases the risk of neurodegenerative diseases. Myrtus connnunis extract (MC) has anti-inflammatory and antioxidant properties. In this study, it is aimed to investigate the effects of Myrtus comniunis on oxidative brain damage caused by a high-fat diet (HFD), using behavioral and biochemical parameters. Twenty- four Wistar albino rats (200-250 g) were divided into three groups. The control group (C) received a standard diet, while HFD groups were received HFD for 16 weeks. MC (100 mg/kg, oral) was given to the HFD + MC group for the last 4 weeks. At the end of the study, the novel object recognition test (NORT) was performed and the hippocampus and blood samples were collected. Acetylcholinesterase (AChE) and Na+/K+- ATPase activities, malondialdehyde (MDA), 8-hydroxy-2'-deoxyguanosine (8-0HdG) and reduced glutathione (GSH) levels were measured in the hippocampal samples and cholesterol levels were analyzed in sera. Findings have shown that NORT performance of the HFD group was reduced, while administration of MC prevents this reduction and in parallel, increased AChE and decreased Na+/K+-ATPase activities were ameliorated by administration of MC. Increased MDA and 8-OHdG levels observed in the HFD group, were decreased in the MC treated HFD group. Our results point out that MC has ameliorative effects on hippocampal oxidative stress and cognitive impairment in high fat nutrition-induced obesity.Publication Open Access The effects of riboflavin on ischemia/reperfusion induced renal injury: Role on caspase-3 expression(MARMARA UNIV, 2019-05-15) ERTAŞ, BÜŞRA; Ayaz Adakul, Betul; Ertas, Busra; Cevikelli, Zatiye Ayca; Ozbeyli, Dilek; Ercan, Feriha; Kandemir, Cansu; Cevik, Ozge; Sener, Tarik Emre; Sener, GokselReactive oxygen metabolites play important roles in ischemia/reperfusion (I/R) injury in several organ systems. Riboflavin has been shown to exert antioxidant and/or anti-inflammatory activities in several experimental models. The aim of this study was to investigate the role of riboflavin against I/R injury in the rat kidney. Wistar albino rats 200-300 g weighing were divided into 3 groups. One week after unilateral nephrectomy, the IR procedure was applied to the rats. To induce I/R injury renal pedicle was clamped for 45 minutes and then rats were allowed reperfusion for 6 hours. Riboflavin (25 mg/ kg, orally) or vehicle was administered for one week as pretreatment. After decapitation, kidney tissue samples were taken for the evaluation of malondialdehyde (MDA), an end product of lipid peroxidation; glutathione (GSH), a key antioxidant; and 8-hydroxydeoxyguanosine (8-OHdG), a specific marker of oxidative DNA damage. Furthermore, myeloperoxidase (MPO) and caspase-3 activities were also examined together with histological analysis. Ischemia/reperfusion induced significant increases in MDA and 8-OHdG levels and MPO and caspase- 3 activities, and decrese in GSH levels. In the riboflavin treatment these indices were found to be reversed back to control levels. The present data demonstrated that riboflavin, through its antioxidant effect, attenuates I/R induced acute renal injury in rats.Publication Open Access Protective effects of petroselinum crispum (parsley) extract against methotrexate-induced hepatotoxicity(2021-01-01) ERTAŞ, BÜŞRA; ÖZBEYLİ, DİLEK; ERTAŞ B., Turan F. B., ÖZBEYLİ D., YANARDAĞ R., SAÇAN Ö., Sener G.© 2021 European Journal of Biology. All rights reserved.Objective: By inhibiting the synthesis of thymidine and purine, and thereby DNA synthesis, Methotrexate (MTX), suppresses the proliferation of cancer cells. It is thought that the side-effect mechanism is related to oxidant molecules derived from MTX metabolism. In this study, we examined whether the Petroselinum crispum extracts (PCr; parsley) of which the antioxidant properties have been previously shown, was protective against MTX induced liver damage. Materials and Methods: Sprague Dawley rats (female/male; 200-250 g) were used. MTX was injected intraperitoneally and PCr extract was given orally. A single dose of 20mg/kg MTX was administered to the groups that were to experience hepatotoxicity. Then, a physiological saline (MTX group) or PCr (2 g/kg, MTX + PCr group) treatment was applied for 5 days. The same treatments were applied to the other groups (control group, PCr group) for 5 days after a single dose saline injection. At the end of the study, the biochemical parameters were examined in the blood and liver tissues taken from animals sacrificed by decapitation. Results: MTX caused a significant increase in malondialdehyde and collagen levels and myeloperoxidase and caspase-3 activities, while glutathione levels were found to have decreased. PCr treatment showed protective efficacy by preventing these increases. Conclusion: It appears that the administration of PCr to MTX treated rats prevented the accumulation of lipid peroxides, inflamatory reactions and depletion of antioxidant glutathione, and thus protected liver tissues against oxidative stress.