Aksaray Üniversitesi Kurumsal Akademik Arşivi
DSpace@Aksaray, Aksaray Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Fritillaria behcetiana (Liliaceae), a new species from eastern Anatolia (Türkiye)
(Magnolia Press, 2025) Yapar, Yakup; Tekşen, Mehtap
Fritillaria behcetiana sp. nov. is described as a new species from Bingöl Province in eastern Anatolia, Türkiye. It is closely related to F. shehbazii, F. chlororhabdota and F. pinardii, but differs from them in several morphological features, including leaf lenght and colour, perianth segment size and colour, anther colour and length, filament length, style lenght and branching. The new species is described in detail, including distribution, ecology, conservation status and photographs with comparisons to F. shehbazii, F. chlororhabdota and F. pinardii.
Effects of artichoke (Cynara scolymus) leaf extract on the growth, blood, and biochemistry parameters of Nile tilapia (Oreochromis niloticus)
(Springer Science and Business Media B.V., 2025) Esen, Ramazan; Öz, Mustafa; Dikel, Suat
In this study, artichoke leaf extract (ALE) was added to the Nile tilapia diet at different ratios (0.00%, 1.00%, 2.00%, and 3.00%) for 30 days to investigate its effects on growth performance, hematological parameters, and blood biochemistry. A total of 240 fish with an average initial weight of 33.9 ± 1.14 g were used. The results showed that ALE supplementation significantly improved growth performance, with the best results observed at 2.00% inclusion (final weight: 58.01 ± 0.18 g, FCR: 1.48 ± 0.02, SGR: 1.79 ± 0.01) (p < 0.05). Hematological analysis revealed an increase in hemoglobin (Hb) levels (control: 9.18 ± 0.62 g/dL; 2.00% ALE: 12.83 ± 1.19 g/dL) and a decrease in white blood cell count (control: 3.54 ± 0.06 m/mm3; 2.00% ALE: 3.39 ± 0.07 m/mm3) (p < 0.05). Blood biochemistry results indicated a significant reduction in glucose (control: 73.67 ± 4.16 mg/dL; 2.00% ALE: 51.00 ± 2.00 mg/dL) and cholesterol levels (control: 227.67 ± 6.11 mg/dL; 2.00% ALE: 117.67 ± 3.21 mg/dL) (p < 0.05), suggesting improved metabolic balance. The findings indicate that 2.00% ALE supplementation enhances growth performance and may positively influence fish health by modulating blood parameters, making it a promising natural additive for sustainable aquaculture.
Effects of Dietary Anise (Pimpinella anisum L.) Oil on Growth Performance, Blood Parameters and Muscle Nutrient Content of Nile Tilapia (Oreochromis niloticus)
(John Wiley and Sons Inc, 2025) Tok, Serkan; Öz, Mustafa; Dikel, Suat
Objectives: This study aimed to investigate the effects of dietary Pimpinella anisum (anise) oil supplementation on growth performance, haematological and biochemical parameters, antioxidant enzyme activities and tissue histopathology in Nile tilapia (Oreochromis niloticus). The goal was to determine the optimal inclusion level that promotes health benefits without inducing toxicity. Methodology: A total of 240 juvenile Nile tilapia were randomly distributed into four groups: control (0.00%) and three treatments receiving anise oil at 0.10%, 0.20% and 0.30% for 8 weeks. Growth performance (weight gain, feed conversion ratio), haematological (RBC, Hb, WBC) and biochemical parameters (ALT, AST, glucose, lipids), oxidative stress markers (SOD, CAT, GPx) and histopathological changes in gill, liver, kidney and muscle tissues were evaluated. Results: Anise oil supplementation at 0.10% and 0.20% significantly improved growth performance, haematological indices and antioxidant enzyme activities (p < 0.05) compared to the control group. However, fish fed 0.30% anise oil showed elevated liver enzymes, glucose and lipid levels, along with moderate tissue damage, indicating potential adverse effects at higher doses. Conclusions: Dietary inclusion of 0.10% to 0.20% anise oil enhances the growth, physiological health and antioxidant defence in Nile tilapia. Nevertheless, 0.30% inclusion may impair metabolic balance and tissue integrity. Anise oil represents a promising natural feed additive for sustainable aquaculture when used at optimal levels.
Exploring the anti-inflammatory and cytotoxic effects of Valeriana tuberosa L. constituents: Integrating in vitro and in silico studies
(Elsevier B.V., 2025) Çelik, Cansel; Özhan, Yağmur; Öztürk, Ceren; Dede, Zülal Sevgi; Çitoğlu, Tuğçe; Tekşen, Mehtap
Valeriana tuberosa L. yielded four new iridoids, valtuberoside I-IV (1–3 and 15), along with 13 known secondary metabolites via activity-directed fractionation. Compounds were characterized by NMR and HRESIMS. EtOH extract, fractions, and isolates were evaluated for their inhibition on nitric oxide (NO) release in LPS-induced RAW 264.7 cells. Compounds 3, 4, 6, 8, 9, 11, 13, 16, and 17 exhibited anti-inflammatory activity by inhibiting the release of NO (IC50 43.44–95.71 μM), and their mode of actions were elucidated by ELISA, Western blot, qPCR, immunostaining techniques and supported by molecular modelling studies. Compounds 8, 9, 11, 13, and 17 showed significant reduction in TNF-α, IL-1β, IL-6, PGE2, and COX-2 enzyme production, while 9 and 13 decreased iNOS protein expression in RAW 264.7 cells. Compound 13 exhibited remarkable inhibition on pro-inflammatory markers, cox-2 gene expression and translocation of NF-κB to the nuclear region. Moreover, it had the most favourable interaction (ds: −6.46 kcal/mol) with iNOS in in silico analyses. The cytotoxic activities of the most active isolates against MCF-7, MDA-MB-231, U87, A172, MIA PaCa-2, PANC-1, Mahlavu, and Hep3B cancer cell lines were assessed using CCK8 assay and their cell death mechanisms were unveiled via Apoptosis/Necrosis Assay Kit. Compound 8 had significant cytotoxic activity against MIA PaCa-2 (IC50 23.7 μM) and Hep3B (IC50 25.4 μM) cancer cell lines, via arresting cell cycle especially in G2/M phase and triggering the apoptotic pathway. These findings indicated that 8 and 13 deserve further in vivo assays on the way to discover new potential drug leads.
Investigation of the effects of morin on potassium bromate-induced brain damage in rats via different pathways with biochemical and histopathological methods
(Elsevier Ltd, 2025) Aygörmez, Serpil; Küçükler, Sefa; Gür, Cihan; Akaras, Nurhan; Maraşlı, Şaban; Kandemir, Fatih Mehmet
Aim: Potassium bromate (KBrO3) is a colorless, odorless substance used as a food additive. It causes multiple organ damage and neurotoxicity. Morin is a flavonoid from the Moraceae family known to have anti-inflammatory, antioxidant, antiapoptotic, antiautophagic, and neuroprotective properties. Therefore, this study aimed to investigate the effects of Morin against KBrO3-induced brain damage. Methods: 62 mg/kg KBrO3 and 50–100 mg/kg Morin were administered to 35 male rats by oral gavage daily for 14 days. Various analyses were performed using molecular, biochemical, and histological methods. Results: The analyses results showed that KBrO3 application decreased antioxidant markers and raised lipid peroxidation in the brain tissue. The KBrO3 application triggered apoptosis, endoplasmic reticulum stress, and inflammation. Morin treatment increased enzymatic and nonenzymatic antioxidant levels and decreased lipid peroxidation. In addition, Morin alleviated KBrO3-induced apoptosis, endoplasmic reticulum stress, and inflammation in the brain tissue. The histopathological analysis revealed an increase in degenerative changes, as well as pyknotic changes and vacuolization in cells, in neurons in the KBrO3 group. Increased hyperemia and congestion were detected in the meninges and vessels in the cerebral cortex. Conclusion: KBrO3 application caused toxicity in the brain tissue and impaired tissue integrity, whereas Morin treatment alleviated KBrO3-induced toxicity.
