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    The effects of CDP-choline treatment in Amanita phalloides mushroom toxicosis
    (Pergamon-Elsevier Science Ltd, 2024) Coskun, Nuri Cenk; Buyucek, Seyma
    Amanita phalloides poisoning is known to be the most fatal case among mushroom poisoning cases. Its main mechanism of toxicity is that it leads to cell death by the irreversible binding of its toxins to the DNA-dependent RNA polymerase II enzyme. This study was planned to analyze the effects of the CDP-choline molecule on Amanita phalloides mushroom poisoning cases. The extract of the Amanita phalloides mushroom was taken and intraperitoneally administered to male Wistar Albino rats at a dose of 0.3 g/kg. In the experiment phase, the rats were divided into three groups of CDP-choline treatment according to the doses of 100 mg/kg, 250 mg/kg, and 500 mg/kg, and one control group was administered a 1 ml/kg dose of 0.9% isotonic NaCl solution. The treatments were then administered intraperitoneally at the 2nd hour, and at the 6th hour, the rats were sacrificed. The degree of damage in the liver and kidney tissues of the rats was evaluated histopathologically. It was concluded that CDP-choline reduced or prevented the damage that occurred in the liver significantly and dose-dependently in the toxicosis picture caused by Amanita phalloides , and it showed a tendency to lower or prevent the damage in the kidney, albeit not significantly.
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    Effects of Walnut Septum on The Enzyme Pathways Associated with Plasma Cholesterol Level
    (Duzce Univ, Fac Medicine, 2024) Sirin, Neslihan; Coskun, Nuri Cenk; Adem, Sevki
    Objective: Cholesterol is crucial compound that plays pivotal role in cellular function in living organisms. Its excess or deficiency in plasma can lead to destruction and disintegration of cell membrane structure. Maintaining balanced intake of cholesterol in diet and seeking medical treatment, if necessary, can help prevent these negative effects. Furthermore, people often resort to natural and herbal remedies, such as walnut septum. Due to dearth of scientific data regarding effects of walnut septum on cholesterol metabolism, this research was undertaken to explore its potential effects. Methods: Analysis was begun by extracting septum using various solvents. Resulting extracts were then analyzed using GC-MS, and compounds were identified by using an integrated library database. To detect effects of extracts on cholesterol esterase and HMGCoA reductase, a colorimetric method was employed. Results: Monophenol, 2,4-Di-tert-butylphenol, 2,6-Di-tert-butylphenol, ethyl linoleate, and butyl linoleate were some of compounds detected by GC-MS scanning. The highest inhibitions were observed in the enzymatic analysis, with a rate of 3.2% (acetone) in the HMG-CoA reductase analysis and 13.6% (water) in the cholesterol esterase analysis. Conclusions: Although the walnut septum extract contains various chemical compounds, our in vitro analysis data suggest that there is no inhibitory effect at therapeutic level on enzyme pathways that regulate plasma cholesterol levels, namely HMG-CoA reductase and cholesterol esterase. We believe that further research is necessary to comprehensively evaluate its effects on other pathways.
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    Toxin components and toxicological importance of Galerina marginata from Turkey
    (Pergamon-Elsevier Science Ltd, 2020) Akata, Ilgaz; Yilmaz, Ismail; Kaya, Ertugrul; Coskun, Nuri Cenk; Donmez, Mert
    Amatoxins, most of which are hepatotoxic, can cause fatal intoxication. While mushrooms in the amatoxin-containing Galerina genus are rare, they can poison humans and animals worldwide. Few studies have profiled the toxicity of Galerina marginata. In addition, many studies indicate that macrofungi can have different characteristics in different regions. In this study, the quantities of toxins present in G. marginata from different provinces in Turkey were analysed using reversed-phase high-performance liquid chromatography with ultraviolet detection (RP-HPLC-UV) and liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS). G. marginata samples were collected from three different regions of Turkey. The taxonomic categorization of mushrooms was based on their micro- and macroscopic characteristics. The presence of toxins alpha-amanitin (AA), beta-amanitin (BA), gamma-amanitin (GA), phalloidin (PHD) and phallacidin (PHC) quantities were measured using RP-HPLC-UV and then were confirmed using LC-ESI-MS/MS. BA levels were higher than AA levels in G. marginata mushrooms collected from all three regions. Moreover, the levels of GA were below the detection limit and no phallotoxins were detected. This is the first study to identify and test the toxicity of G. marginata collected from three different regions of Turkey using RP-HPLC-UV. This is also the first study to confirm the UV absorption of amatoxins in G. marginata using LC-ESI-MS/MS, which is a far more sensitive process. More studies evaluating the toxicity of G. marginata in other geographic regions of the world are needed.
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    Treatment of Burn Wounds with a Chitosan-Based Hydrogel Dressing Containing Artemisia absinthium L.: A Comprehensive In Vivo Study
    (2024) Aydın, Meryem; Ozcan, Yunus; Kantarcıoglu Coşkun, Sinem; Alpay, Merve; Coskun, Nuri Cenk
    Objective: Wormwood (Artemisia absinthium L.) is a valuable medicinal plant that has been used for the wound healing since ancient times. Hydrogel dressings are often preferred for wound care in treatment. In this study, the effects of chitosan-based hydrogel dressings containing wormwood were investigated in rats with a burn wound model for the first time. Material-Method: Certain phenolic compounds in wormwood extracts were detected by LC-MS/MS and antioxidant activities were calculated using the DPPH. The antibacterial activity of the dressings was tested using the disk diffusion method. Tissues taken from 48 female Sprague-Dawley rats were histopathologically examined at days 3rd and 21st. Skin tissue Il-1?, Il-6, TNF-? and Il-10 levels were measured using ELISA. All data obtained from histopathological examination and cytokine levels were statistically evaluated. Results: Fifteen phenolic compounds were quantitatively determined in wormwood extracts. The antioxidant activities of high-, medium-, and low-dose wormwood extracts were 91.1% ± 0.054, 89.6% ± 0.012 and 84.1% ± 0.02, respectively. The hydrogel dressings showed no antibacterial activity against S. aureus (ATCC 29213) or P. aeruginosa (ATCC 27853). Granulation tissue formation, collagen increase, and regular scar appearance were higher in all three wormwood groups. Wound contraction was completed and remodeling phase started at day 21st, especially in the high-dose wormwood treatment group. Tissue cytokine levels were determined in pg/ml in all groups. Conclusion: It was determined that A. absinthium L. can promote wound healing through various mechanisms of action and shows immunomodulatory effects, and is appropriate for use as a wound dressing in the form of a chitosan-based hydrogel.