Browsing by Author "Turan, Abdullah"

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Antioxidant and Hepatoprotective Properties of Dried Fig Against Oxidative Stress and Hepatotoxicity in Rats
(Elsevier, 2016) Turan, Abdullah; Celik, Ismail
The aim of this study was to investigate the hepatoprotective effect and antioxidant role of dried fig (DF) (Ficus carica L.) against ethanol-induced oxidative stress. Experiment was designed as normal Control, 20% ethanol, 10% DF and 10% DF+ 20% ethanol groups. The hepatoprotective and antioxidant role of the dried DF supplementation feed against ethanol induced oxidatif stress were evaluated by liver histopathological changes, measuring liver damage serum enzymes (LOSE), antioxidant defense system (ADS) and malondialdehyde (MDA) content in various tissues of rats following the exposure of experimental for 50 days. The biochemical analysis showed a considerable increase the LDSE in the ethanol group as compared to that of control group whereas, decreased in 10% DF +20% ethanol group as compared to that of ethanol group. In addition, the DF supplementation diet restored the ethanol-induced MDA and ADS towards to control. The hepatoprotection of DF is further substantiated by the almost normal histologic findings of liver in 10% DF+ 20% ethanol group against degenerative changes in ethanol group. The results indicated that the DF could be as important as diet-derived antioxidants and antihepatotoxicity in preventing oxidative damage in the tissues by inhibiting the production of ethanol-induced free radicals and hepatotoxicity in rats. (C) 2016 Elsevier B.V. All rights reserved.
Characterization of P(Pmo), P(Lo) and P(Ro) Organoparticles, Their Bioactivity Properties and Their Effect on Pancreatic Cancer Capan-1 Cell
(Elsevier Science Sa, 2023) Alpaslan, Duygu; Turan, Abdullah; Dudu, Tuba Ersen; Bozer, Busra Moran; Aktas, Nahit; Turk, Mustafa
For the first time in the literature, p (PmO), p (LO) and p (RO) organo-particles were synthesized from Peppermint oil, Lemon oil and Rose oil. Of the organo-particles L-929 cell line viability/cytotoxicity and anticancer effect against Capan-1 pancreatic cancer cell line were investigated. p (PmO), p (LO) and p (RO) organoparticles were featured by thermogravimetry (TGA), Fourier Transform Infrared Spectroscopy (FTIR), Scanning electron microscope (SEM), Particle size (DLS), and particle charge (zeta potential, Zeta) analyses. Antioxidant, biocompatible, and antimicrobial activities and in vitro cytotoxicity specialties were investigated. In studies on Capan-1 and L-929 cell lines, it was observed that p (PmO), p (LO) and p (RO) organo-particles were effective on L-929 fibroblast cell line on Capan-1 pancreatic cancer cell line. In addition, it was observed that p (PmO), p (LO) and p (RO) organo-particles were not toxic in L-929 cell lines at high doses. When the Capan-1 cell line MTT analysis results of p (PmO), p (LO) and p (RO) organo-particles were examined, a difference was observed between cell viability rates and apoptosis and necrosis values. The highest % apoptosis rate was observed in the p (RO) organo particle.
Determination of Hepatoprotective and Antioxidant Role of Dried Fig (Ficus Carica L.) Ethyl Alcohol Induced in Rat
(2014) Turan, Abdullah; Çelik, İsmail
Bu çalışmada, etil alkol ile deneysel oksidatif stres oluşturulan sıçanlarda kuru incirin karaciğer koruyucu ve antioksidan rolünün belirlenmesi amaçlanmıştır. 24 adet Wistar albino cinsi sıçanlar 4 deney grubuna ayrılmıştır (kontrol, %20 etil alkol, %10 kuru incir ve %10 kuru incir + %20 etil alkol). 50 gün muamele sonunda; kuru incir katılımlı yemin karaciğer koruyucu ve antioksidan rolü için; karağir histopatolojik değişikleri ile karaciğer harabiyeti serum enzimlerinden aspartat aminotransferaz (AST), alanin aminotransferaz (ALT), gamma glutamil transpeptidaz (GGT) ve laktat dehidrogenaz (LDH) enzim seviyeleri ortaya konuldu. Diğer yandan karaciğer, beyin, böbrek, dalak, eritrosit ve kalp dokularında antioksidan savunma unsurlarından katalaz (CAT), süperoksid dismutaz (SOD), glutatyon peroksidaz (GSH-Px), glutatyon-S-transferaz (GST), glutatyon redüktaz (GR) enzim aktiviteleri ile redükte glutatyon (GSH) seviyeleri ve malondialdehit (MDA) içerikleri tespit edilerek değerlendirilmiştir. Elde edilen sonuçlara göre; alkol grubunun serum AST, ALT GGT ve LDH enzim seviyeleri kontrol grubuna göre önemli düzeyde artarken, %10 kuru incir + etil alkol grubu alkol grubuna göre AST ALT ve LDH enzim seviyeleride önemli oranda azaldı. 50 gün deneysel muamele sonunda; kontrol grubu ile kıyaslandığında alkol grubu beyin, dalak ve böbrek dokularında MDA miktarı anlamlı artarken, %10 kuru incir + etil alkol grubunda ise alkol grubuna göre tüm dokularda istatistiki açıdan önemli düzeyde azalma olduğu görüldü. Ayrıca, alkol sıçanların farklı dokulardaki oksidatif stres sonucu antioksidan savunma sistem unsurlarının seviyelerinde dalgalanmalara neden olurken, kuru incirin bu dalgalanmalara karşı kesin iyileştirici etkileri tespit edilememiştir. Diğer yandan, karaciğer histopatolojisinde ise etil alkol grubu rat karaciğerlerinde yaygın olarak hepatositlerde hidropik dejenerasyon ve yer yer koagulasyon nekrozu belirlendi. %10 İncir + etil alkol grubunda ise hidropik dejenerasyonunun belirgin düzeyde azalmış olduğu, ayrıca koagulasyon nekrozunun da bulunmadığı görülmüştür. Sonuçlar gösterdi ki, kuru incir içeriğinin alkolün 50 günlük süre boyunca oksidatif hasarına karşı karaciğer koruyucu ve antioksidan rolünün olabileceği sonucuna kesin olarak varılamamıştır.
Developing Poly(agar-Co Oil) Based Organo-Hydrogels for the Controlled Drug Release Applications
(Elsevier, 2020) Olak, Tulu; Turan, Abdullah; Alpaslan, Duygu; Dudu, Tuba Ersen; Aktas, Nahit
In this study, it was aimed to investigate the synthesis, characterization and drug release behaviors of organohydrogels containing pH-sensitive Agar (A), Glycerol (G), Thyme Oil (TO). The novel organo-hydrogels containing TO were prepared in an emulsion media by the free-radical polymerization and crosslinking reactions among Agar (A), Glycerol (G), TO, N, N, methylenebisacrylamide (MBA) or glutaraldehyde (GA) reagent. Swelling ability (ethanol, acetone, ethanol/ID water (1:1), acetone/ID water (1:1) and gasoline environments and different pH), Fourier Transform Infrared Spectroscopy (FTIR) analysis and 5-Fluorouracil (5-Flu) drug release of the organo-hydrogels were profoundly determined and some structural parameters for organohydrogels such as blood clotting, hemolysis analysis, antioxidant analysis were also evaluated in this study. The FTIR spectra confirmed that the TO was bonded onto the organo-hydrogel structure, and the A, G and TO macromolecular chains interpenetrated through the MBA or GA reagent. When swelling analyzes were examined, it was determined that organo-hydrogels, which added thyme oil to the structure, swelled not only in pure water and tap water but also in organic solvents such as ethanol, acetone, ethanol/ID water (1:1), acetone/ID water (1:1) and gasoline. All of the organo-hydrogels synthesized in the light of blood clotting, hemolysis analysis, antioxidant analysis were hemocompatible and could be used within the body. The release results indicated that the organo-hydrogel p(AG-m-TO)(3) and p(AG-g-TO)(3) had the highest 84.3% and 73.3% release capacity. In addition, it was reported that the release capacities of organo-hydrogels were inversely proportional to the increased amount of TO. When 5-Flu drug release was examined in terms of kinetic models, it was observed that the release adapted to the Korsmeyer-Peppas (KPKM) model. And it was also determined that organo-hydrogels based on p(AG-m-TO) comply with the non-Fick law and organo-hydrogels based on p(AG-g-TO) comply with the Case II transport. In the light of the results obtained, their easy formability, their appropriate mechanical and physical properties make Organo-hydrogels suitable candidates for drug delivery systems.
Effect of Isgin (Rheum Ribes L.) on Biochemical Parameters, Antioxidant Activity and Dna Damage in Rats With Obesity Induced With High-Calorie Diet
(Taylor & Francis Ltd, 2023) Bati, Bedia; Celik, Ismail; Turan, Abdullah; Eray, Nese; Alkan, Elif Ebru; Zirek, Ali Kemal
The present study was designed to investigate the effects ofRheum ribesL. plant root extracts on DNA damage, biochemical and antioxidant parameters in rats with experimental obesity induced with a high-calorie diet. The study groups were divided as "normal control(NC)", "obese control(OC)", "obese +Rheum ribes(OR1)(200 mg/kg)" and "obese +Rheum ribes(OR2)(400 mg/kg)". At the end of the application, rats were sacrificed and blood and tissue samples were obtained. According to the results obtained, the marker of DNA damage in tissues of 8-OHdG was determined to be significantly reduced in brain tissue of the OR1 and OR2 groups compared to the NC group. However, fluctuations were identified in the MDA activity, antioxidant defense system elements and serum biomarkers in tissues. In conclusion,Rheum ribesplant root extract ensured improvements in DNA damage in brain tissues and MDA levels and showed positive effects on antioxidant parameter activities in different tissues.
Evaluation of Particle Biosynthesis, P(Okra) Particle Bioactivity, and Drug Release Properties Using Abelmoschus Esculentus (Okra) Plant Extract
(Springer, 2024) Alpaslan, Duygu; Turan, Abdullah; Dudu, Tuba Ersen; Aktas, Nahit
Interest in synthesizing functional materials from natural compounds has increased recently. For this reason, compound particles attract attention due to their multifunctional properties. Abelmoschus esculentus L. (Okra) is a vegetable species belonging to the Hibiscus family, widely used for its edible unripe fruit. This study synthesized the particle from the Abelmoschus esculentus (Okra) extract (Oe) by emulsion polymerization. In this synthesis, ammonium persulfate (APS, initiator) to form free radicals at the Abelmoschus esculentus (Okra) extract (Oe) and ethylene glycol di methacrylate to cross-link the formed radicals were used. The synthesized poly(Okra) ((p(O)) particles structure Field emission scanning and Fourier transform infrared and biological activities (biocompatible, antioxidant, antimicrobial, and hydrogen peroxide scavenging) were characterized. The p(O) particle showed good antimicrobial activity against Staphylococcus aureus, Bacillus cereus, Enterococcus faecalis, and Candida albicans. It has been measured to have high antioxidant and hydrogen peroxide scavenging activity with p(O) particles.
A Garlic Oil-Based Organo-Hydrogel for Use in Ph-Sensitive Drug Release
(Springer int Publ Ag, 2021) Alpaslan, Duygu; Olak, Tulu; Turan, Abdullah; Ersen Dudu, Tuba; Aktas, Nahit
In this study, six different organo-hydrogels containing agar-glycerol (AG)-based garlic oil (GO) were synthesized using two different crosslinkers (N,N, methylenebisacrylamide (MBA), glutaraldehyde (GA)) to ensure the controlled release of ceftriaxone (Ce) and carboplatin (Cp). Synthesized organo-hydrogels were characterized by FT-IR. Afterward, swelling behaviors were investigated in DI, tap water, ethanol, acetone, ethanol/DI water (1:1), acetone/DI water (1:1) and gasoline environments and different pH. As a result of hemolysis, blood clotting and antioxidant analysis, organo-hydrogels have been shown to have blood compatibility and antioxidant properties. Ce and Cp release properties of the prepared organo-hydrogels were also determined. The highest Ce release rate was obtained to be 37.8% for p (AG-g-GO)(3) at pH 8.0 after 7 days. However, the highest Cp release rate was found to be 95.4% for p (AG-g-GO)(3) at pH 7.4 after 1 day.
Properties, Bioactivity, in Vitro Drug Release and Functionality as a Biomaterial of Poly(Apigenin) Hydrogel
(Horizon Research Publishing, 2025) Alpaslan, Duygu; Dudu, Tuba Ersen; Turan, Abdullah; Aktas, Nahit
Controlled release systems used in the biomedical industry or still in the animal testing phase generally use various chemicals, especially natural or artificial polymers. In recent years, there has been increasing interest in plant-based products as controlled release materials. For the first time in the literature, poly(apigenin) hydrogel was synthesized from apigenin, an important flavonoid. Swelling percentages and biodegradation percentages of poly(apigenin) hydrogel at different pH values were investigated. Structural analyses of poly(apigenin) hydrogel were performed using FT-IR (Fourier Transform Infrared Spectroscopy). To examine drug release amounts and kinetics, different drug active ingredients (paracetamol, ceftriaxone, and 5-Fluorouracil(5-fu)) were loaded into the poly(apigenin) hydrogel. The release of paracetamol, ceftriaxone, and 5-fu from the synthesized poly(apigenin) hydrogel was determined as 95%, 58% and 96%, (pH 7.4) respectively. For kinetic studies, zero-order, first-order, Higuchi, and Korsmeyer-Peppas, models were used. When the correlation coefficients (R2) were compared, it was seen that the drug release kinetics fit better with the Korsmeyer-Peppas model. It was observed that the poly(apigenin) hydrogel synthesized in this study was a suitable material for the release systems of paracetamol, ceftriaxone, and 5-Fluorouracil.
Synthesis, Characterization and Investigation of Antioxidant Effect of Nanoparticles From Juniper (juniperus Oxycedrus L. Ssp. Oxycedrus) Plant Biopolymer
(2024) Turan, Abdullah; Aktaş, Nahit
İnsanoğlu ilk çağlardan beri çevresindeki bitki, mantar ve diğer canlıları kendi amaçları için kullanmaya başlamış ve zamanla hangisinin hangi amaçlar için kullanacağını öğrenmiştir. Bitkiler tarafından üretilen maddeler diğerlerine göre daha fazla önem kazanmış ve saflaştırılmaya başlanmıştır. Bugün kullanılan ilaçların büyük bir kısmı ya bitki ekstraktlarından elde edilen bileşikler ya da bu bileşiklerin türevleridir. Son zamanlarda teknolojik gelişmeler ile beraber bu bileşiklerden nanopartiküllerin sentezlenmesine olan ilgi artırmıştır. Bu doktora tezi kapsamında tıbbi ve farklı kullanım alanları olan ardıç (Juniperus oxycedrus L. ssp. oxycedrus) türünün meyve metanol ekstraktı (AE), ekstraktan elde edilen amentoflavone ve cuprassoflavone karışımı (AC) ve bunlardan elde edilen nanopartiküllerin (p(AE), p(AC)) sentezlenmesi hedeflenmiştir. Kullanılan bu malzemelerin kan uyumluluk testleri, antibakteriyel ve antioksidan özellikler araştırılmıştır. Sentezlenen nanopartiküllerin yüzey yükü ve boyut analizi, sıcaklığa bağlı yapısal bozunma davranışları, olası bağ yapıları ve morfolojik özellikleri çeşitli enstrümental analiz cihazları kullanılarak incelendi. Sentezlenen nanopartiküllere ayrıca ağrı kesici (parsetamol) ve antikanserojen (5-fluorouracil (5-Fu) ve Paklitaksel) ilaçlar yüklendi. İlaç yüklü bu partiküllerin farklı pH ortamında salım davranışı ve farklı ilaç salım kinetik modelleri incelenmiştir. Ayrıca deneysel olarak karaciğer harabiyeti oluşturulmuş sıçanlarda AC ve p(AC) nanopartiküllerin serum biyobelirteçlerinden aspartat aminotransferaz (AST), alanin aminotransferaz (ALT), üre ve keratin (Cre) seviyeleri ile karaciğer, böbrek, dalak, beyin, akciğer, kan ve kalp dokularında katalaz (CAT), glutatyon redüktaz (GR), süperoksid dismutaz (SOD), glutatyon S-transferaz (GST) enzim aktiviteleri ve redükte glutatyon (GSH) seviyeleri ile lipid peroksidasyon (Malondialdehit) (MDA) düzeyleri incelenmiştir. Çalışma kapsamında kullanılan ardıç meyve metanol eksraktı, AC p(AE) ve p(AC) nanopartiküllerin kana uyumlu, antioksidan ve antimikrobiyal özelliğe sahip olduğu tespit edildimiştir. Parasetamol yüklü p(AE) nanopartiküllerinden % 95 parasetamol salındığı gözlenmiştir. Farklı ilaç yüklenen p(AC) nanopartikülerinden ise pH 5.4'te % 97 parasetamol, pH 8'de % 90 paklitaksel ve pH 7.4'te % 99 5-Fu salındığı belirlenmiştir. İlaç yüklü nanopartiküllerin ilaç salım kinetik modelleri incelendiğinde p(AE) parasetamol için pH 7.4'te Higuchi modeline, p(AC) parasetamol için pH 5.4'te Krosmeyer-Peppas modeline, p(AC)5-Fu için pH 8'de Higuchi modeline ve p(AC) paklitaksel için pH 8'de Krosmeyer-Peppas kinetik modeline uyduğu görülmüştür. Sentezlenen partiküllerin sıçan uygulamalarında serum biyobelirteçlerinde genel olarak olumlu etki ettiği ve antioksidan enzimlerin aktivitesi ile GSH ve MDA seviyelerinde farklı dokularda farklılıklar olmasına rağmen genel olarak olumlu etki ettiği tespit edilmiştir.
Use of Coconut Oil-Based Organo-Hydrogels in Pharmaceutical Applications
(Springer, 2022) Alpaslan, Duygu; Olak, Tulu; Turan, Abdullah; Ersen Dudu, Tuba; Aktas, Nahit
In this study, six different organo-hydrogel containing Agar-Glycerol (AG) based Coconut Oil (CnO) were synthesized using different crosslinkers to ensure the controlled release of D-3 Vitamine and 5-Fluorouracil (5-Flu). Synthesized organo-hydrogels were characterized by FT-IR, Afterwards, swelling behaviors were investigated in ethanol, acetone, ethanol/ID water (1:1), acetone /ID water (1:1) and gasoline environments and different pH. As a result of hemolysis, blood clotting and antioxidant analysis, organo-hydrogels have been shown to have blood compatibility and antioxidant properties. The effects of the initial pH of the solution on the drug release process were investigated. It was observed that the most release occurred at pH 2 and glutaraldehyde crosslinker. Release kinetics models were applied to understand the mechanism of the release system of D-3 Vitamine and 5-Flu (anti-cancer) with poly(Agar-co-Glycerol-co-Coconut Oil) (p(AG-co-CnO)) organo-hydrogel. The value of the correlation coefficient (R-2) was used as the best model fit indicator of different models and it was determined that the balance data fit the Korsmeyer-Peppas with large R(2)s and the Higuchi kinetic model. The results showed that the p(AG-co-CnO) organo-hydrogel can be used as a suitable carrier for the controlled release of D-3 Vitamin and 5-Flu.
Yara Kaplama Malzemesi Olarak Kollajen Esaslı Hidrojel Filmleri
(2018) Erduğan, Hüseyin; Şahiner, Nurettin; Sahiner, Mehtap; Suner, Selin Sağbaş; Turan, Abdullah
Yara kaplama malzemesi olarak kullanılacak kollajen/kitosan (koll/kitosan) vekollajen/kitosan/poli(N-izopropil akrilamid) (koll/kitosan/p(NIPAm)) iç içe geçmiş ağ yapılı(IPN) hidrojelleri gluteraldehit ve poli(etilenglikol)diakrilat çapraz bağlayıcıları kullanılarakfilm şeklinde sentezlenmiştir. Hazırlanan hidrojellerin morfolojik karakterizasyonu optikmikroskop ile yapılmış ve hidrojel yüzeylerinde 1-20 µm boyutunda mikro gözenekleriçerdiği belirlenmiştir. Hidrojellerin yapısal ve termal karakterizasyonu FT-IR spektroskopisive termal gravimetrik analiz (TGA) ölçümleri ile belirlenmiştir. Koll/kitosan vekoll/kitosan/p(NIPAm) IPN hidrojellerinin pH 5,4, 7,4 ve 9,0 da denge şişme kapasiteleribelirlenmiş ve koll/kitosan/p(NIPAm) hidrojeli en yüksek pH 5,4 değerinde % 428±97oranında şiştiği belirlenmiştir. Ayrıca hidrojellerin 25-50 ºC aralığındaki denge şişmedeğerleri ölçülmüş ve koll/kitosan hidrojellerinin yaklaşık % 200 şişme değeri ile neredeysebütün sıcaklıklarda aynı şişme derecesine sahip olduğu gözlemlenirkenkoll/kitosan/p(NIPAm) hidrojelinin 25 ºC sıcaklıkta % 312±14 oranında şişerken, yapısındakisıcaklık duyarlı p(NIPAM) den dolayı 50 ºC ısıtıldığında % 59±2 şişme değeri ile küçüldüğügözlemlenmiştir. Ayrıca, hazırlanan koll/kitosan esaslı IPN hidrojelleri deksametazon sodyumfosfat ilacının salımında kullanılmış ve koll/kitosan hidrojellerinin 114,6±2,9 mg/g ilacı 15saatte salarken koll/kitosan/p(NIPAm) aynı sürede yaklaşık 51,3±1,2 mg/g saldığıgözlemlenmiştir.