Browsing by Author "Kocak, Yilmaz"

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Aqueous Extract of Chives (Allium Schoenoprasum L.) Plant Impairs Erythrocyte Deformability in Sickle Cell Patients
(Ios Press, 2021) Arihan, Okan; Nader, Elie; Oto, Gokhan; Kocak, Yilmaz; Fort, Romain; Connes, Philippe
Sickle cell anemia (SCA) is a genetic disorder characterized by chronic hemolysis and the presence of erythrocytes with low deformability, which may trigger vaso-occlusive crises. We tested the in-vitro effects of aqueous extract of chives (Allium schoenoprasum L.) on erythrocyte deformability of SCA patients. Blood samples from 6 apparently healthy volunteers and 5 SCA patients were collected into heparin coated tubes. Both apparently healthy and SCA patient blood samples were incubated with 80 mu g/mL chives plant aqueous extract at 37 degrees C for 60 min and erythrocyte deformability was measured by ektacytometry (3 Pa and 30 Pa; 37 degrees C). Results of incubation of apparently healthy blood samples with plant extract showed that incubation did not alter erythrocyte deformability significantly. However, for SCA blood samples, erythrocyte deformability decreased significantly with plant extract exposure at 3 Pa (p < 0.043) and 30 Pa (p < 0.043). In conclusion, although ex-vivo incubation with plant extract does not fully model gastrointestinal processing of onions, the decrease in SCA erythrocyte deformability following incubation with aqueous chives should stimulate further studies to test the in-vivo effects of this diet in sickle cell mice.
Assessment of Therapeutic Potential of Silver Nanoparticles Synthesized by Ferula Pseudalliacea Rech. F. Plant
(Elsevier, 2022) Kocak, Yilmaz; Oto, Gokhan; Meydan, Ismet; Seckin, Hamdullah; Gur, Tugba; Aygun, Aysenur; Sen, Fatih
Plant-mediated synthesis of silver nanoparticles (Ag NPs) has increased its use in various biomedical applications due to its cost-effectiveness, renewable and environmentally friendly properties. Therefore, the focus of the study was to synthesize Ag NPs and to evaluate their antibacterial, and antioxidant activities by using the aqueous root extract of Ferula pseudodalliacea plant as a reducing agent. In addition, the synthesis of nanoparticles was confirmed by performing Ag NPs/Fp characterization processes. According to the findings of our research, color change due to surface plasmon resonance was confirmed by UV-vis spectrometry. The crystal properties of Ag NPs/Fp were determined according to the XRD model. Phytochemicals responsible for coating and reduction of Ag NPs/Fp were observed by FT-IR analysis. It has been shown that the therapeutic effect of Ag NPs/Fp exhibits better antimicrobial and antioxidant activity than aqueous extract. In addition, it was determined that Ag NPs/Fp structures showed the best antifungal effect against Candida albicans ATTC 90028 pathogen and gave a better zone than Rifampicin antibiotic. Therefore, studies at the molecular level and more comprehensively are required to determine the bioactive components and pharmacological effects of Ferula pseudodalliacea plant to confirm our antibacterial, antioxidant, and antifungal activity results.
Chitosan/Pva-supported Silver Nanoparticles for Azo Dyes Removal: Fabrication, Characterization, and Assessment of Antioxidant Activity
(Royal Soc Chemistry, 2024) Meydan, Ismet; Aygun, Aysenur; Tiri, Rima Nour Elhouda; Gur, Tugba; Kocak, Yilmaz; Seckin, Hamdullah; Sen, Fatih
With the advancement of technology, studies in the field of nanotechnology have attracted great interest in recent years. The fact that nanomaterials have superior advantages over micromaterials provides a wide range of uses. Green synthesis is an effective way to prepare nanomaterials with an easy, fast, and environmentally friendly method. Within the scope of the study, AgNPs were synthesized using basil extract and combined with chitosan/PVA as a support material. By using chitosan/PVA support materials, the surface area of AgNPs was increased and it was aimed to improve their properties. The synthesized AgNPs@chitosan/PVA nanocomposite was characterized using various methods. In the UV-Vis spectrum, an absorbance peak was observed at 430 nm for the AgNPs@chitosan/PVA nanocomposite, and the particle size was determined as 25.10 nm according to TEM results. In addition, the photocatalytic and antioxidant activities of AgNPs@chitosan/PVA nanocomposite were investigated. The antioxidant activity of the AgNPs@chitosan/PVA (100 mu g mL-1) nanocomposite against DPPH and H2O2 was determined as 89.18% and 71.87%, respectively. The photocatalytic activity of the AgNPs@chitosan/PVA nanocomposite against methylene blue (MB), methylene red (MR), methylene orange (MO), safranin, and crystal violet (CV) dyes was 77%, 85%, 79%, 54%, and 9%, respectively. While the highest photocatalytic activity was observed against MR dye, very low photocatalytic activity was observed for CV. In light of the results obtained, it can be said that the AgNPs@chitosan/PVA nanocomposite has the potential to be used as an antioxidant agent and photocatalyst. The photocatalytic activity of AgNPs@chitosan/PVA nanocomposite was tested against different dyes such as methylene blue, methylene orange, and methylene red as an effective photocatalyst.
Effect of Boric Acid and Borax on Heart Rate in Rats Treated With Benzo(A)pyrene and 3-Methylcholanthrene
(Parlar Scientific Publications (p S P), 2021) Bulduk, Bahattin; Oto, Gokhan; Ozdemir, Hulya; Gunbatar, Nizamettin; Bulduk, Mehmet; Kocak, Yilmaz; Keskin, Siddik
In this study, the effects of boric acid (BA) and borax (BX) on the heart rate of rats treated with benzo(a)pyrene (B(a)P) and 3-methylcholanthrene (3-MC) were investigated. This research was conducted with the permission of Van Ytiztincti Yil University Animal Experiments Local Ethics Committee. Wistar albino rats weighing 250 +/- 50 g were used in the study and divided into nine groups, six in each group. Group 1 was assigned as the control group. B(a)P (100 mg/kg) was administered intraperitoneally to Group 2 and 3-MC (100 mg/kg) to Group 3. BA only was administered to Group 4 at 300 mg/L in drinking water and to Group 5, BX only at 300 mg/L. Group 6 received B(a)P (100 mg/kg) + BA (300 mg/L) and Group 7 3-MC (100 mg/kg) + BA (300 mg/L). B(a)P (100 mg/kg) + BX (300 mg/L) was administered to Group 8 and 3 -MC (100 mg/kg) BX (300 mg/L) to Group 9. At the end of the 150th day, the rats were anaesthetised and their ECGs recorded. The heart rate (beats/min) was found to be statistically significant in B(a)P, 3 -MC and groups compared to the control group. It was found that the heart rate increased by 3 -MC and B(a)P in the groups was regulated by BA and BX.
The Effect of Resveratrol Treatment on Heart Rate and Qt Values in Rats With Chronic Fluorosis
(Parlar Scientific Publications (p S P), 2022) Bulduk, Bahattin; Oto, Gokhan; Ozdemir, Hulya; Gunbatar, Nizamettin; Kocak, Yilmaz; Gul, Cihan; Elasan, Sadi
With this study, it was investigated how the impact of sodium fluoride (NaF) exposure on the cardiac conduction system would be treated with resveratrol. A total of 8 rats, 4 female and 4 male, weighing 200-300 grams, were used in each group. The first group was separated as the control group. The second group was determined as the group given 10 melt/day NaF, the third group as the group given 50 mg/It/day resveratrol, and the fourth group as the group given 10 mg/It/day NaF + 50 mg/It/day resveratrol. In the study conducted for 12 weeks, resveratrol and NaF were mixed into the drinking water of rats. When the study was finished after 4 months, the rats were anesthetized. They were placed in the right lateral position for the recording of ECGs. ECG samples were evaluated in II. derivation. Heart rate numbers were found high and QT values were found low in the groups that were administered only NaF. The heart rate and QT values of the groups administered with resveratrol alone or in combination with NaF showed parallelism with the control group.
Effects of Artemisinin on Anti-Epileptogenic, Antioxidant and Cholinesterase Enzymes in Pentylenetetrazole-Induced Kindling Model in Mice
(Assoc Pharmaceutical Teachers india, 2023) Kocak, Yilmaz; Yunusoglu, Oruc; Huyut, Zubeyir; Turkan, Fikret
Background: Artemisinin (ART) is a compound synthesized from the plant Artemisia annua. This compound has various therapeutic effects and is widely used against malaria. However, ART is known to have modulating effects on GABA (gamma-aminobutyric acid) receptors, which are thought to be responsible for epileptic seizures. This study aimed to evaluate the effects of ART on anti-convulsant, antioxidant, and cholinesterase enzyme activities in Pentylenetetrazole (PTZ)-induced kindling model in mice. Materials and Methods: In the experiment, 6 groups were formed, with seven mice in each group. Mice received a total of 11 intraperitoneal injections of PTZ (35 mg/kg). On the last day of the study, a threat dose of PTZ (75 mg/kg) was administered. In addition, behavioral analysis tests (Locomotor activity and rotarod) and biochemical measurements were performed. Results: Compared with the PTZ group, ART attenuated the severity of the kindling, decreasing the seizure score. ART and VPA reversed increased oxidative stress. Decreased cholinesterase enzymes in PTZ-induced brain increased with ART treatment. While the PTZ application impaired locomotor activity in mice, the ART application provided improvement in locomotor activity. However, no significant difference was found between the groups in the motor performance of the mice. Conclusion:The findings show that ART may have the potential to prevent PTZ-induced oxidative stress, neurochemical changes, behavioral disorders, and seizures.
Effects of Fluoride on Oxidative Dna Damage, Nitric Oxide Level, Lipid Peroxidation and Cholinesterase Enzyme Activity in a Rotenone-Induced Experimental Parkinson's Model
(Taylor & Francis Ltd, 2023) Kocak, Yilmaz; Oto, Gokhan; Huyut, Zubeyir; Alp, Hamit Hakan; Turkan, Fikret; Onay, Ezgi
ObjectiveEnvironmental toxins are known to be one of the important factors in the development of Parkinson's disease (PD). This study was designed to investigate the possible contribution of fluoride (F) exposure to oxidative stress and neurodegeneration in rats with PD induced by rotenone (ROT).Materials and methodsA total of 72 Wistar albino male rats were used in the experiment and 9 groups were formed with 8 animals in each group. ROT (2 mg/kg) was administered subcutaneously (sc) for 28 days. Different doses of sodium fluoride (NaF) (25, 50 and 100 ug/mL) were given orally (po) for 4 weeks. Malondialdehyde (MDA), glutathione (GSH), nitric oxide (NO), oxidative DNA damage (8-OHdG) and cholinesterase (AChE/BChE) enzyme activities were evaluated in serum and brain tissue homogenates.ResultsRats treated with ROT and NaF had significant increases in serum and brain MDA, NO content, and decreases in GSH. In addition, the combination of ROT and NaF triggered oxidative DNA damage and resulted in increased AChE/BChE activity.ConclusionsFindings suggest that NaF and ROT may interact synergistically leading to oxidative damage and neuronal cell loss. As a result, we believe that exposure to pesticides in combination with NaF is one of the environmental factors that should not be ignored in the etiology of neurological diseases such as PD in populations in areas with endemic fluorosis.
Microwave-Assisted Fabrication of Agruni Trimetallic Nps With Their Antibacterial Vs Photocatalytic Efficiency for Remediation of Persistent Organic Pollutants
(Springer, 2024) Kocak, Yilmaz; Tiri, Rima Nour Elhouda; Aygun, Aysenur; Meydan, Ismet; Bennini, Nihed; Karahan, Tugba; Sen, Fatih
Antibiotic-resistant bacteria have long been a concern and become a public health problem around the world. Therefore, various methods are being tried to develop new-generation therapeutic agents against antibiotic resistance. One of these methods is biogenic nanoparticle (NP) synthesis. Besides the antibacterial properties of biogenic NPs, it also contributes to the solution of the environmental toxic waste problem. In this study, we present a more environmentally friendly microwave approach to produce AgRuNi trimetallic nanoparticles (AgRuNi TNPs). The structural properties and chemical composition of TNPs were characterized by several techniques such as XRD, TEM, FTIR etc. The average particle size of AgRuNi TNPs was found to be 3.61 +/- 0.63 nm. For the removal of a persistent organic pollutant, such as methyl orange (MO) under solar irradiation, the photocatalytic activity of AgRuNi TNPs to remove MO dye was examined. The photodegradation percentage (%) of AgRuNi TNPs against MO dye after 300 min was calculated as 92%. Additionally, the antibacterial efficacy of the generated nanoparticles against gram (+) and gram (-) was evaluated. Overall, the current method to produce AgRuNi TNPs is based on the principles of green chemistry and pharmaceutical technology and shows promise for the creation of highly effective photocatalytic systems and the development of drug delivery systems to generate antibacterial activity.