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    Cinnamaldehyde is an effective anti-inflammatory agent for treatment of allergic rhinitis in a rat model
    (Elsevier Ireland Ltd, 2016) Hanci, Deniz; Altun, Huseyin; Cetinkaya, Erdem Atalay; Muluk, Nuray Bayar; Cengiz, Betul Peker; Cingi, Cemal
    Objectives: The effect of cinnamaldehyde on the treatment of allergic rhinitis (AR) was investigated in rat model. Methods: Twenty-eight female Wistar albino rats were randomly divided into four groups: Group 1 (control) (C), Group 2 (AR with no treatment) (AR + NoTr), Group 3 (AR + Azelastine HCl) (AR + Aze), and Group 4 (AR + cinnamaldehyde) (AR + Cin). At day 21, AR + Aze rats were given an Azelastine HCl drop, and AR + Cin rats were given cinnamaldehyde intranasally. In all groups, allergic symptoms histopathological results were evaluated. Results: The AR + NoTr group showed the worst allergic symptoms, cilia loss and greater inflammation. In the AR + Aze and AR + Cin groups, allergic symptom scores were higher than those in the control group. However, between AR + Aze and AR + CM groups, there were no significant differences in the allergic symptom scores Histopathological analysis revealed vascular congestion and an increase in goblet cell numbers in the AR + Cin group. However, AR + Cin rat nasal mucosa had less plasma cell infiltration compared with the AR + NoTr group. In rats from the AR + Aze group, analysis of the nasal mucosa revealed less eosinophil infiltration than that seen in the AR + NoTr group. A lower score for mast cell (MC) infiltration was observed in the nasal mucosa of rats treated with Azelastine HCl compared with cinnamaldehyde. Conclusions: In this study we observed that both Azelastine HCl and cinnamaldehyde reduced allergic symptoms in an AR rat model. Cinnamaldehyde decreased vascular congestion as well as plasma cell, eosinophil, and inflammatory cell infiltration into the lamina propria. (C) 2016 Elsevier Ireland Ltd. All rights reserved.
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    The role of Bax/Bcl-2 and Nrf2-Keap-1 signaling pathways in mediating the protective effect of boric acid on acrylamide-induced acute liver injury in rats
    (Pergamon-Elsevier Science Ltd, 2022) Cengiz, Mustafa; Ayhanci, Adnan; Akkemik, Ebru; Sahin, Ilknur Kulcanay; Gur, Fatma; Bayrakdar, Alpaslan; Cengiz, Betul Peker
    Introduction: This study aims to investigate whether boric acid (BA) can protect rats from acrylamide (AA)induced acute liver injury. Materials and methods: AA was used to induce acute liver injury. Thirty rats were divided into five group including Group 1 (saline), Group 2 (AA), Group 3 (20 mg/kg BA), Group 4 (10 mg/kg BA+AA) and Group 5 (20 mg/kg BA+AA). Their blood and liver were harvested to be kept for analysis. Liver function enzyme activities were performed by spectrophotometric method. Catalase (CAT), superoxide dismutase (SOD) activity, and malondialdehyde levels were determined by colorimetric method. The in-silico studies were performed using the blind docking method. Results: Administration AA to rats, biochemical parameters, liver histology, and expression levels of apoptotic markers were negatively affected. However, after the administration of BA, the altered biochemical parameters, liver histology, and expression levels of apoptotic markers were reversed. Moreover, the mechanisms of AA-induced deterioration in the levels of SOD, CAT, and Nrf2-Keap-1 and the mechanisms of the protective effect of BA against these deteriorations were explained by in silico studies. Conclusion: Thus, the present study could explain the interactions between AA and thiol-containing amino acid residues of Keap-1, the effect of BA on these interactions, and the biochemical toxicity caused by the AA. In this sense, this work is the first of its kind in the literature. Based on the biochemical, histopathological, and in silico results, it can be suggested that BA has the potential to be used as a protective agent against AA-induced liver injury.