WoS İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.14627/6

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Browsing WoS İndeksli Yayınlar Koleksiyonu by Author "Akakin, Dilek"

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    Article
    Citation Count: 4
    Gilaburu (viburnum Opulus L.) Fruit Extract Has Potential Therapeutic and Prophylactic Role in a Rat Model of Acetic Acid-Induced Oxidant Colonic Damage
    (Elsevier Ireland Ltd, 2024) Şener, Göksel; Cam, Muhammet Emin; Yuksel, Meral; Akakin, Dilek; Taskin, Turgut; Emre, Gizem; Karakoyun, Berna; Eczacılık Meslek Bilimleri Bölümü
    Ethnopharmacological relevance: Ulcerative colitis (UC) which has a global impact on the health care system with its recurrent and incompletely curable characteristics, affects the patients' quality of life. Gilaburu (GB; Viburnum opulus L.) is a fruit with rich polyphenol ingredient which is used ethnobotanically in T & uuml;rkiye for medicinal purposes (for example, to pass kidney stones, to treat stomach, heart, and liver diseases, hemorrhages, hypertension, ulcers, common cold, tuberculosis, rheumatic and menstrual pain, and diabetes). On the other hand, the effects of GB in the experimental UC model have not been studied.Aim of the study: This study aimed to explore the potential antioxidant and anti-inflammatory effects of GB fruit extract in improving acetic acid (AA)-induced UC.Materials and methods: Starting immediately after (AA + GB group) or 1 week before (GB + AA + GB group) the colitis induced by intrarectal AA (5%; v/v) administration, the rats orally received GB (100 mg/kg) once per day for 3 days. The control and AA groups were administered orally saline (1 ml), while the AA + SS group were administered sulfasalazine (SS; 100 mg/kg; orally) as a positive control once per day for 3 days. Distal colonic tissue specimens were obtained for the histological and biochemical [myeloperoxidase (MPO), malondialdehyde (MDA), glutathione (GSH), chemiluminescence (CL), caspase-3, 8-hydroxy-2(')-deoxyguanosine (8-OHdG), matrix metalloproteinase (MMP)-9, transforming growth factor (TGF)-beta(1), smad-3 and cytokine (tumor necrosis factor (TNF)-alpha, interleukin (IL)-1 beta, IL-6, IL-8, interferon (IFN)-gamma), measurements] evaluations on the 3(rd) day.Results: Elevated macroscopic and microscopic damage scores, high tissue wet weight values, increased tissue-associated MPO, MDA, CL, caspase-3, 8-OHdG, cytokines (TNF-alpha, IL-1 beta, IL-6, IL-8), MMP-9, TGF-beta(1), smad-3 levels, and decreased GSH values of the AA group were all reversed by GB treatments (AA + GB and GB + AA + GB groups) (p < 0.05-0.001). However, sulfasalazine treatment (AA + SS group) did not change the IL-8, 8-OHdG, MMP-9, and TGF-beta(1) measurements significantly.Conclusions: Gilaburu shows both anti-inflammatory and antioxidant effects against AA-induced colonic damage by suppressing neutrophil infiltration, regulating inflammatory mediators, inhibiting reactive species production, lipid peroxidation, and apoptosis, conserving endogenous antioxidant glutathione, and ameliorating oxidative DNA damage. Since the current ulcerative colitis drugs display limited benefits and adverse side effects, potential therapeutic and/or prophylactic role of gilaburu can be evaluated in ulcerative colitis.
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    Article
    Citation Count: 0
    Histological and Biochemical Effects of an Ethanolic Extract of myrtus Communis Leaf on the Pancreases of Rats Fed High Fat Diets
    (Taylor & Francis Ltd, 2024) Şener, Göksel; Ertas, Busra; Sen, Ali; Sener, Goksel; Ercan, Feriha; Akakin, Dilek; Eczacılık Meslek Bilimleri Bölümü
    We investigated the effects of an ethanolic extract of Myrtus communis subsp. communis (MC) leaves on the pancreases of rats fed with a high fat diet (HFD). Wistar albino rats were fed either with standard lab chow (Control group) or with a 45% fat diet (HFD and HFD+MC groups) for 4 months, with the MC extract (100 mg/kg) being administered by orogastric gavage to rats in the HFD+MC group during the last month. Blood and pancreas samples were collected from all experimental groups at the end of the study. Insulin and leptin levels, and the lipid profile, were analyzed in the blood serum. Pancreatic injury was assessed histologically. Insulin, nuclear factor kappa beta (NF-kappa B), and alpha-smooth muscle actin (alpha-SMA) were assessed using immunohistochemistry. Apoptosis was assessed using terminal deoxynucleotidyl transferase dUTP nick end-labeling (TUNEL) immunohistochemistry. In addition, oxidant/antioxidant activity was analyzed by biochemical methods. Increased body weight, serum insulin and leptin levels, blood glucose level and pancreatic tissue malondialdehyde (MDA), 8-hydroxy-2'-deoxyguanosine (8-OHdG) levels, myeloperoxidase (MPO) activity and decreased tissue glutathione (GSH) level were observed in the HFD group compared to the Control group, in addition to dyslipidemia. An increased histopathological damage score, pancreatic islet area, insulin, TUNEL, NF-kappa B and alpha-SMA immunoreactivity were seen in animals from the HFD group compared to the Control group. However, such pathological changes were reduced in the HFD+MC group. Our data indicate further investigation of MC extract as a therapeutic adjuvant for HFD-induced pancreatic injury, acting via anti-inflammatory and antioxidant mechanisms, is worth carrying out.
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    Article
    Citation Count: 2
    cotinus Coggygria Scop. Attenuates Acetic Acid-Induced Colitis in Rats by Regulation of Inflammatory Mediators
    (Springer, 2023) Şener, Göksel; Ertas, Busra; Cevik, Ozge; Yildirim, Aybeniz; Kayali, Damla Gokceoglu; Akakin, Dilek; Sener, Goksel; Eczacılık Meslek Bilimleri Bölümü
    In traditional medicine, many medicinal plants are used in the treatment of various diseases caused by inflammation. The objective of the present study is to elucidate for the first time the effects of Cotinus coggygria (CC) ethanol extract (CCE) on colonic structure and inflammation of acetic acid-induced ulcerative colitis in rats. Colonic damage was assessed using disease activity index score, enzyme-linked immunosorbent assay, and hematoxylin-eosin staining. Also, in vitro antioxidant activity of CCE was investigated by ABTS methods. Total phytochemical content of CCE was measured spectroscopically. Acetic acid caused colonic damage according to disease activity index and macroscopic scoring. CCE significantly reversed these damages. While the levels of proinflammatory cytokines TNF-alpha, IL-1beta, IL-6, and TGF-1beta increased in tissue with UC, IL-10 level decreased. CCE increased inflammatory cytokine levels to values close to the sham group. At the same time, while markers indicating disease severity such as VEGF, COX-2, PGE2, and 8-OHdG indicated the disease in the colitis group, these values returned to normal with CCE. Histological research results support biochemical analysis. CCE exhibited significant antioxidant against ABTS radical. Also, CCE was found to have a high content of total polyphenolic compounds. These findings provide evidence that CCE might be benefit as a promising novel therapy in the treatment of UC in humans due to high polyphenol content and justify the use of CC in folkloric medicine for treatment of inflamed diseases.