Ozlem Bingol Ozakpinar

• Associate Professor
• Professor (Associate) at Marmara University

Secondary metabolites obtained from plants are among the most commonly encountered chemotherapeutics used in cancer treatment. Plants contain thousands of metabolites; therefore, it is important to reach the compound primarily responsible for activity by fractionating plant extracts through activity-guided isolation. The cytotoxic activities of C....

Research on the production of graphene, its derivatives and composites has been enhanced in the past two decades. Graphene is well known for its exceptional physicochemical properties including extensive surface area, good biocompatibility, high loading capacity, and functionalization capability which make it an ideal candidate for drug delivery sy...

Cancer, the second-leading cause of death worldwide after cardiovascular diseases, is a deadly disease caused by numerous mutations that affect cell growth and differentiation. While there is no definitive cure for cancer yet, new target molecules are being identified with the help of developing technology, and appropriate treatment protocols are b...

Some new triazole containing acetamide derivatives 9-20 using paracetamol as starting material were synthesized and their structure were characterized by FTIR, 1H-NMR, 13C-NMR and MS data. In vitro cytotoxic activities of all synthesized molecules against five cancer cell lines (human lung cancer A549, human chronic myelogenous leukemia K562, human...

Colorectal cancer (CRC) is the fourth most commonly diagnosed cancer and the third leading cause of cancer-related deaths worldwide. A substantial body of literature supports the crucial role of vitamin D (VD) in the etiology, progression, prognosis, and treatment of cancer. Recent clinical studies have found an inverse correlation between CRC inci...

Monosodium glutamate (MSG) is found in refined foods. Apocynin (APO) is a selective NADPH oxidase (NOX) inhibitor. The aim of this experimental study was to investigate possible effects of MSG and the curative effects of APO in rats. Twenty-eight male Sprague-Dawley rats were randomly divided into four groups (Normal control, APO, MSG and MSG + APO...

In the present study, poly(lactic acid) (PLA) and poly(ethylene succinate) (PESu) or poly(ethylene glycol) (PEG) under the framework of quality by design, were blended to produce effective sustained-release matrices for Paclitaxel delivery. A complete physicochemical characterization including weight variation, thickness, water uptake, moisture abs...

Corneal ulcer, which is brought on by a breach in the epithelial barrier, is a dangerous infection of the avascular corneal stroma. New treatment strategies are needed, suppressing the aggressive nature of the disease and including a combination of different drugs. In this study, vancomycin (VAN) and fluconazole (FLU) dual‐drug loaded dual‐layered...

Background: the aim of this study was to investigate the effects of apocynin (APO) on hormone levels, the blood-testis barrier, and oxidative biomarkers in monosodium glutamate (MSG) induced testicular degeneration. Methods: Sprague Dawley male rats (150-200 g; n = 32) were randomly distributed into four groups: control, APO, MSG, and MSG + APO....

Some novel triazole-bearing acetamide derivatives 9-26 were synthesized starting from carvacrol. All synthesized compounds were characterized by FTIR, 1 H-NMR, 13 C-NMR and MS data. In vitro cytotoxic activities of all synthesized molecules against five cancer lines (human breast cancer MCF-7, human lung cancer A549, human prostate cancer PC-3, hum...

Objective: Monosodium glutamate causes oxidative stress that affects a variety of organ systems, along with the kidney. The aim of this study was to evaluate the protective role of apocynin in kidney degeneration caused by monosodium glutamate using biochemical and histological methods. Materials and Methods: Sprague-Dawley rats (n=32) were used fo...

In the present study, the effect of different ratios of GelMA concentration has been exhibited for wound dressing implementation by the electrospinning method using a new polymer combination of Gelatin methacrylate (GelMA)/Polycaprolactone (PCL)/Chitosan (CS). The nanofiber composites were fabricated due to their biocompatible, biodegradable, impro...

[Patent App.] Composite aerogel drug carrier system containing vitamin D loaded carbon nanofibers

Herein, we examined the modulatory effects of Apocynum (APO) on Monosodium Glutamate (MSG)-induced oxidative damage on the brain tissue of rats after long-term consumption of blood serum components by biochemical assays, Fourier transform infrared spectroscopy (FTIR), and machine learning methods. Sprague-Dawley male rats were randomly divided into...

Some novel triazole-bearing ketone and oxime derivatives were synthesized from Ibuprofen. In vitro cytotoxic activities of all synthesized molecules against five cancer lines (human breast cancer MCF-7, human lung cancer A549, human prostate cancer PC-3, human cervix cancer HeLa, and human chronic myelogenous leukemia K562 cell lines) were evaluate...

Objective: Growth arrest-specific 6 (GAS 6) has a role in cell proliferation and was detected in different cancer types. The aim of this study was to evaluate the plasma GAS 6 levels in colon cancer patients. Methods: This was a prospective study and conducted in a research and training hospital in Turkey. Thirty-three healthy volunteers were enrol...

Biyokimya, canlı sistemde gerçekleşen kimyasal olayları, bu sistemde yer alan tüm moleküllerin yapısını, bileşimini ve fonksiyonunu inceleyen bir bilim dalıdır. Temel biyokimya, biyokimyasal mekanizmaların moleküler düzeyde anlaşılması için alt yapıyı oluştururken hastalıklar ve tedavilerin öğrenilmesini kolaylaştırmaktadır. Biyokimyasal olayların...

Obesity and male infertility are problems that affect population. Exercise is a nonpharmacological way to reduce the negative health effects of obesity. The purpose of this study was to examine the effects of exercise on hormone levels, blood‐testis barrier, and inflammatory and oxidative biomarkers in rats that became obese due to a high‐fat diet...

In this study, nanofiber patches, a blend of the Silk fibroin(SF)/poly (caprolactone) (PCL)/Lanolin, loaded with different concentrations, were successfully synthesised by the electrospinning method. Nanofiber patches were subjected to detailed analysis by scanning electron microscopy (SEM), Fourier transforms infrared spectroscopy (FTIR), and diff...

Purpose The study aimed to evaluate the possible preventive effect of two concentrations (3 and 5% w/w) of Eugenia jambolana (EJ) extract against 5-FU-induced mucositis. Method Sixteen adult rats were separated into four groups: two control and two preventive groups. Animals in Groups 1, 2, and 3 were injected intraperitoneally with 60 mg/kg/day o...

Objective: The aim of this study was to observe the apoptotic/cytotoxic effects of exogenous SPARC on colon cancer cell line HT-29, then to investigate the function of stabilin-1 and integrin αvβ3, which are possible receptors for SPARC in colon cancer cells and to determine the quantitation of their receptor numbers. Methods: Appropriate doses of...

In this study, using a new polymer combination of Chitosan(CH)/Xanthan Gum(XG) has been exhibited for wound dressing implementation by the 3D-Printing method, which was fabricated due to its biocompatible, biodegradable, improved mechanical strength, low degradation rate, and hydrophilic nature to develop cell-mimicking, cell adhesion, proliferatio...

In the present study, the various 28 hybrid molecules containing hydrazone and sulfonate moieties were synthesized and characterized by FTIR, 1H-NMR, 13C-NMR spectroscopy and LC-MS spectrometry, besides elemental analysis. The compounds were evaluated for their antiproliferative effects against six cancer cell lines, namely A549 (non-small cell lun...

Objective: The aim of this study was to assess the preventive effects of swimming exercise on kidney and bladder damage caused by a high-fat diet (HFD) using morphological and biochemical measures. Methods: Sprague Dawley rats were fed either standard chow (CONT, 6% fat) or HFD (45% fat) for 18 weeks, these rats were divided into two subgroups at t...

In the present study, the various 28 hybrid molecules containing hydrazone and sulfonate moiety were synthesized and characterized by FTIR, ¹ H-NMR, ¹³ C-NMR spectroscopy and LC-MS spectrometry, besides elemental analysis. The compounds were evaluated for their antiproliferative effects against six cancer cell lines, namely A549 (non-small cell lun...

The synthesis and biomedical applications of nano/micromotors have attracted great attention. In this work, preparation and characterization of catalytic gold/poly(3,4-ethylenedioxythiophene)/platinum (Au/PEDOT/Pt) micromotors were reported to present their contribution for cancer biomarker miRNA-21 detection. Potential use of these motors for poss...

The present study is on the production of graphene-based materials via modification of graphene oxide (GO) using a simple, easy to handle and green method. Natural substances cinnamaldehyde (CA) and undecylenic acid (UA) were used for the modification. GO was produced by using a revised Hummers method. Modification was done at various temperatures...

The compound (2) formed by esterification of dimethyl morpholine (1) was converted to acetohydrazide (3). Subsequently Schiff bases (4 a–d) and carboxy(thio)amide derivatives (5 a–e) were synthesized. Then 1,2,4‐triazole (6 a–e), thia(oxa)zolidine (7 c,e) and thia(oxa)zol (8 c,e) derivatives were obtained by ring closure from carboxy(thio)amides. M...

We evaluated the effects of Rubus tereticaulis in healing process by determining the total carbonyl content, collagen synthesis, and total protein level on rat wounded tissues. Wounds were performed in the back of 54 Wistar rats, using a biopsy punch instrument with 0.6 mm in diameter. Rats were randomly divided into three groups: (i) un-treatment...

A series of new 1,3,4-oxadizole derivatives containing thioether group, has been synthesized to investigate their mPGES-1 inhibitory activities. The synthesized compounds were also evaluated for their anticancer and COX-1/2 inhibitory activities. All compounds were checked for their purity using TLC and HPLC analyses. The melting points, elemental...

Background/aims: This study was aimed to investigate the protective effects of swimming exercise on nonalcoholic fatty liver disease (NAFLD) associated with high fat diet-induced obesity, using microscopical and biochemical parameters. Materials and methods: Sprague Dawley male rats were fed either standard chow (STD group; 6% fat) or high-fat d...

Objectives: Some novel 1-(2-methyl-5-nitro-1H-imidazol-1-yl)-3-(substituted phenoxy)propan-2-ol derivatives (3a-g) were designed and synthesized. Materials and methods: Compounds 3a-g were obtained by refluxing ornidazole (1) with the corresponding phenolic compounds (2a-g) in the presence of anhydrous K2CO3 in acetonitrile. Results: Following...

We investigated the protective effects of swimming exercise on high-fat diet-induced heart and aorta damage by evaluating oxidative stress and the endothelial nitric oxide (NO) system. Sprague Dawley rats were fed either standard chow (STD, 6% fat) or high-fat diet (HFD; 45% fat) for 18 weeks, with half of the animals trained by daily swimming sess...

INTRODUCTION: In this study, some novel 1-(2-methyl-5-nitro-1H-imidazol-1-yl)-3-(substituted phenoxy)propan-2-ol derivatives (3a-g) were designed and synthesized. METHODS: Compounds 3a-g were obtained by refluxing ornidazole (1) with the corresponding phenolic compounds (2a-g) in the presence of anhydrous K2CO3 in acetonitrile. RESULTS: Following t...

Background The aerial parts of Dipsacus laciniatus are traditionally used in the treatment of colds as cold tea; decoction prepared from its roots and aerial parts are used for the treatment of diabetes and cancer, respectively. The extraction procedures and solvents are important steps in the processing of bioactive constituents from the plant mat...

Background Hydrazide-hydrazones constitute an important class of compounds for new drug development. In this study, a series of 39 new acylhydrazones (3-41), derived from (2S)-3-methyl- 2-[[(4-methylphenyl)sulfonyl]amino]butanoic acid hydrazide were synthesized with further aim to achieve biologically active acylhydrazones carrying an amino acid si...

The unique antimicrobial and anticancer properties of metal nanoparticles made them an excellent candidate for multiple purposes in medical field. As being an environment friendly method biosyn-thesis, is drawing attention day by day. Silver nanoparticles were synthesized in our study by using the cell extract obtained from fungus Aspergillus niger...

Activated platelets and glycated lipoproteins are responsible for atherothrombosis in diabetics. Melatonin and native high-density lipoproteins are crucial in the preservation of pro/oxidant-antioxidant balance. The aim of the present study was to investigate the in vitro effects of native high-density lipoproteins and melatonin on altering the pla...

Recently, NK1R (Neurokinin-1 receptors) take attention as new and promising target in anticancer drug development area. It has been proved that non-peptide NK1R antagonists L-733,060, aprepitant and L-732,138 inhibited tumor growth in several cancer cell lines. For the development of novel NK1R antagonists as antitumor agents, heterocyclic compound...

This study aims to determine the potential protective effects of ferulic acid against cisplatin-induced nephrotoxicity and to compare its effect with curcumin, a well-known protective agent against cisplatin- induced toxicity in rats. Administration of cisplatin resulted in high BUN (Blood Urea Nitrogen), creatinine, MDA (Malondialdehyde), MPO (Mye...

The objective of this study was to establish reference intervals for growth arrest-specific 6 (GAS6), a vitamin K-dependent protein, in human adult plasma according to the Guideline of Clinical and Laboratory Standards Institute (CLSI) C28-A3. Blood samples were collected from 308 healthy volunteers aged 18–72 (157 female, 151 male). A non-parametr...

Diabetes is a factor that causes hepatic damage. This experimental study has been designed to investigate possible therapeutical and protective effects of oxytocin in streptozotocin-(STZ) induced diabetes. Wistar albino rats used in this study were randomly divided into four groups: I) Control Group, II) STZ induced Diabetic Group (STZ Group), III)...

Objective: The aim of this study is to determine relationship of cytochrome P-450 2C19 (CYP2C19) enzymes polymorphism, side effects, and medication adherence in patients who have been diagnosed with major depression and have utilized selective serotonin reuptake inhibitors. Methods: Fifty-three major depression patients (mean of age: 33.25±11.29 ye...

Ovarian ischaemia reperfusion (I/R) injury may affect fertility. Protecting ovaries against organ damage is therefore clinically important. In this study, we assessed the effects of remifentanil and investigated whether it has a protective effect. Eighteen female Wistar albino rats were assigned to three groups (n = 6): a sham group, an ischaemia r...

Background and objective: The current study aimed to evaluate cardiovascular risk factors, haematological and biochemical parameters, and serum endocan concentrations in lichen planus (LP) patients. Methods: This study was conducted with 86 cases, including 43 LP patients and 43 healthy controls. Cardiovascular risk factors, haematological and b...

In this study, a series of thiosemicarbazide derivatives 12–14, 1,2,4-triazol-3-thione derivatives 15–17 and compounds bearing 2-(4H-1,2,4-triazole-3-ylthio)acetamide structure 18–32 have been synthesized starting from phenolic compounds such as 2-naphtol, paracetamol and thymol. Structures and purity of the target compounds were confirmed by the u...

In this study, we synthesized several new 1,2,4-triazoles starting from phenolic compounds such as 2-naphtol, paracetamol and thymol. These results demonstrated that compound 19 triggers apoptosis by using intrinsic and extrinsic pathways, while compounds 18 and 25 induce apoptotic cell death by triggering intrinsic pathway

PURPOSE: To investigate the effects of remifentanil as an antioxidant and analyze the histopathologic, biochemical changes in experimental ischemia-reperfusion (I/R) exposed rat uteri. METHODS: Wistar albino rats were assigned to three groups (n = 7). 2h period of ischemia was followed by 1h of reperfusion in the I/R and the I/R-remifentanil group...

A series of diflunisal 4-thiazolidinones were synthesized. Some selected compounds were determined at one dose towards the full panel of 60 human cancer cell lines by National Cancer Institute. 2',4'-Difluoro-4-hydroxy-N-[4-oxo-2-(thiophen-2-yl)-1,3-thiazolidin-3-yl]biphenyl-3-carboxamide (4a) demonstrated the most marked effect on K-562 cancer cel...

Tolmetin hydrazide and a novel series of tolmetin hydrazide-hydrazones 4a-l were synthesized in this study. The structures of the new compounds were determined by spectral (FT-IR, (1) H NMR) methods. N'-[(2,6-Dichlorophenyl)methylidene]-2-[1-methyl-5-(4-methylbenzoyl)-1H-pyrrol-2-yl]acetohydrazide (4g) was evaluated in vitro using the MTT colorimet...

The field of reproductive biology has undergone significant developments in the last decade. The notion that there is a fixed reserve pool of oocytes before birth was established by Zuckerman in 1951. However, in 2004, an article published in nature challenged this central dogma of mammalian reproductive biology. Tilly's group reported the existenc...

Preeclampsia (PE) is a hypertensive disease of pregnancy complicating 2-8% of all pregnancies. The exact pathophysiology still remains unknown. Growth arrest-specific 6 (Gas6) is a member of the vitamin K-dependent protein family and it has been suggested as a novel atherothrombotic risk factor with anti-angiogenic and pro-atherogenic properties. T...

A novel series of new ten tolmetin hydrazide derivatives, N-Alkyl/Arylsubstituted-2-{[1-methyl-5-(4-methylbenzoyl)- 1H-pyrrol-2-yl]acetyl}hydrazinecarbothioamides [4a-j] have been synthesized in this study. The structures of the new compounds were determined by spectral (FT-IR, 1H-NMR, 13C-NMR and 2D-NMR) methods and their purity were proven by ele...

Growth arrest-specific 6 (Gas6) is a newly discovered vitamin K-dependent protein, which is a ligand for TAM receptors [Tyro3 (Sky), Axl, and Mer] from the tyrosine kinase family. Gas6 knockout mice were resistant to venous and arterial thrombosis. There are contradictory reports on the presence of Gas6 and its receptors in mouse platelets. The obj...

Oxytocin (OXY) plays a crucial role in reproduction. The aim of this study is to investigate the therapeutic and protective effects of oxytocin treatment on streptozotocin (STZ) induced diabetes in testicular tissue. The rats were randomly divided into four experimental groups: (I) Control Group, (II) STZ induced Diabetic Group (STZ Group), (III) S...

Aerobik hucrelerin normal metabolik yolaklarinda bulunan cesitli enzimler ile travma, enfeksiyon, reperfuzyon ve inflamasyon gibi cevresel faktorler reaktif oksijen turlerini (ROT) olusturur. Bu radikaller bir veya birden fazla eslesmemis elektron iceren molekuller olup, yuksek kimyasal aktivitelerinden dolayi hucresel makromolekullerin hasarina ne...

A series of polyurethane film were prepared from poly(ethylene glycol) with different molecular weight (PEG 1500, 3000, and 8000) and castor oil by one-shot bulk polymerization method. Hexamethylene diisocyanate and 1,4-buthane diol were used as diisocyanate and chain extender, respectively. In order to characterize the samples, their density, swel...

Ya zış ma Ad re si / Add ress rep rint re qu ests to: Sadik Sahin Zeynep Kamil Maternity and Children's Hospital, Deparment of Gynecology and Obstetrics, Opr. Dr. Burhanettin Üstünel Cad. No:10, Uskudar, Istanbul -Turkey Elekt ro nik pos ta ad re si / E-ma il add ress: drsadiksahin@gmail.com Ka bul ta ri hi / Da te of ac cep tan ce: 28 Nisan 2014 /...

Objective: To find out whether there is a correlation between the extent of platelet activation and inflammation and the severity of preeclampsia (PE) in the third trimester of pregnancy. Methods: Forty-one women with PE (n = 23 severe, n = 18 mild) and 80 normotensive pregnant (NP) women were included in the study. Their blood samples were obta...

Aim: The aim of this study was to determine plasma Growth Arrest Specific Protein 6 (GAS6) protein levels in patients with unexplained recurrent pregnancy loss (RPL) and compare them to those of pregnant and to healthy non-pregnant women with a history of at least one live delivery. Patients and methods: A total of 205 women were included in the...

In this case–control study, we aimed to evaluate the serum and seminal plasma levels of Selenium (Se), total antioxidant capacity (TAC), and Coenzyme Q10 (CoQ-10) and determine their relationship with sperm concentration, motility, and morphology in men with idiopathic infertility. A total of 59 subjects were enrolled in the study. Forty four patie...

Objective To evaluate the effects of the immunosuppressant tacrolimus as an antioxidant and analyze the histopathologic changes in rat uteri exposed to experimental ischemia-reperfusion (I/R) injury. Design Experimental study. Setting Experimental surgery laboratory in a university. Animal(s) Twenty-eight female rats exposed to experimentally in...

Aims: New biomarkers are required to detect diabetic nephropathy earlier in persons with type 2 diabetes mellitus. Recent experimental studies indicate that growth arrest-specific protein 6 (Gas6) may have a role in pathogenesis of complications associated with diabetes. The objective of the current study is to examine whether plasma Gas6 concentr...

The tumor suppressor INPP4B is an important regulator of phosphatidyl-inositol signaling in the cell. Reduced INPP4B expression is associated with poor outcomes for breast, prostate, and ovarian cancer patients. INPP4B contains a CX5R catalytic motif characteristic of dual-specificity phosphatases, such as PTEN. Lipid phosphatase activity of INPP4B...

Objective: The aim was to investigate the putative anti-inflammatory and anti-apoptotic effect of obestatin in a rat model of subarachnoidal haemorrhage (SAH). Methods: To induce SAH, rats were injected with 0.3 mL blood into their cisterna magna. At 48 hours rats were decapitated after neurological examination. Blood-brain barrier (BBB) permeab...

Etodolac hydrazide and a novel series of etodolac hydrazide-hydrazones 3-15 and etodolac 4-thiazolidinones 16-26 were synthesized in this study. The structures of the new compounds were determined by spectral (FT-IR, (1) H NMR, (13) C NMR, HREI-MS) methods. Some selected compounds were determined at one dose toward the full panel of 60 human cancer...

A series of novel N-(3-substituted aryl/alkyl-4-oxo-1,3-thiazolidin-2-ylidene)-4-[5-(4-methylphenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]benzenesulfonamides 2a–e were synthesized by the addition of ethyl α-bromoacetate and anhydrous sodium acetate in dry ethanol to N-(substituted aryl/alkylcarbamothioyl)-4-[5-(4-methylphenyl)-3-(trifluoro-methyl)-1...

Objective: Thrombocytopenia remains a serious problem in patients treated with high-dose chemotherapy and bone marrow transplantation. In recent years, infusion of ex vivo expanded megakaryocytes (Mk) progenitors into patients has been proposed as a strategy for shortening the time of platelet engraftment. The development of in vitro culture method...

5199 Objective Growth Arrest Specific-6 (Gas6) is a new vitamin K-dependent protein and is a ligand for TAM receptors, three receptors (Tyro, Axl and Mer) belonging to the receptor tyrosine kinase subfamily. The number of publications concerning the physiological importance of the new vitamin-K dependent proteins, which are not members of the coag...

In this study, for the first time, the morphology of the dorsal and ventral skin of Triturus karelinii using light microscopy through histochemical methods was described. The skin exhibited basic morphological characteristics of the other urodeles: the epidermis composed of keratinized stratified epithelium with numerous conical protrusions and the...