Güneş, Seda
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Güneş, S.
Gunes, Seda
Güneş, S
Gunes, S.
Gunes, S
Gunes, Seda
Güneş, S
Gunes, S.
Gunes, S
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03.02. Department of Chemical Engineering
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2ZERO HUNGER
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3GOOD HEALTH AND WELL-BEING
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264
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6
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201
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9
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4
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WoS Citation Count
201
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264
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22.33
Scopus Citations per Publication
29.33
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8
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1
| Journal | Count |
|---|---|
| Helicobacter | 3 |
| Advances in Drug Delivery Systems for Healthcare: From concept to clinic | 1 |
| International Journal of Biological Macromolecules | 1 |
| Journal of Biologically Active Products from Nature | 1 |
| Journal of Materials Science: Materials in Medicine | 1 |
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Now showing 1 - 9 of 9
Article Citation - WoS: 96Citation - Scopus: 113Hypericum Perforatum Incorporated Chitosan Films as Potential Bioactive Wound Dressing Material(Elsevier Ltd., 2017) Güneş, Seda; Tıhmınlıoğlu, FundaRecent studies in wound dressing applications offer new therapies and promote wound healing process. The aim of this study was to develop Hypericum perforatum (St John's Wort) oil incorporated chitosan films for wound dressing applications. H. perforatum oil as a potential therapeutic agent was encapsulated in chitosan film to achieve a better wound dressing material. Oil incorporated chitosan films were successfully prepared by solvent casting method in different oil concentrations (0.25–1.5%v/v). Water vapor permeability (WVP), mechanical test, swelling behavior and surface hydrophobicity were performed in order to characterize the prepared films. Antimicrobial test was performed by disc diffusion method and the growth inhibition effects of the films including different amount of H. perforatum oil were investigated on Escherichia coli and Staphylococcus aureus. WVP increased with oil incorporation and the highest value was obtained for 0.25% oil concentration.The highest strain value was obtained in 0.25% oil content films although tensile stress decreased with increasing oil content. H. perforatum oil incorporated films had antimicrobial effect on both microorganisms. Chitosan based films had no cytotoxic effects on NIH3T3fibroblast cells and provided a good surface for cell attachment and proliferation. The results showed that the H. perforatum incorporated chitosan films seems to be a potential and novel biomaterial for wound healing applications.Conference Object In Vitro Evaluation of Bioactive Chitosan Microspheres for Eradicating Helicobacter Pylori Biofilm(Wiley, 2016) Güneş, Seda; Arslan, Nur; Demiray Gürbüz, Ebru; Tıhmınlıoğlu, Funda; Yılmaz, ÖzlemCertain H. pylori strains can form biofilm both inside and outside human host to protect itself under environmental stress. Biofilm contributes to development of antimicrobial resistance by some kind of mechanisms like providing a barrier for diffusion and allowing resistance gene expression.Book Part Computational Approaches for Antibody-Based Drug Design(Institute of Physics Publishing, 2024) Gunes, S.; Arkca, I.; Atik, S.B.; Ulucan-Karnak, F.; Sezgin, H.T.; Uyar, A.This chapter includes various aspects of antibodies with a major emphasis on computational tools in antibody design. In this scope, current antibody databases, computational tools, and approaches for modelling antibodies and nanobodies, the structure, and interface prediction are analyzed. On the other hand, various antibody design techniques such as grafting, the significance of antibody-drug conjugates, and how computational methods contribute to the development of therapeutic antibodies are discussed with relevant strategies in the literature. Lastly, the production cost and the rising market value of antibodies are emphasized. © IOP Publishing Ltd 2023. All rights reserved.Conference Object Determination of Biofilm Formation by Helicobacter Pylori(Wiley, 2016) Arslan, Nur; Güneş, Seda; Demiray Gürbüz, Ebru; Tıhmınlıoğlu, Funda; Yılmaz, ÖzlemBackground : Certain H. pylori strains form biofilm in laboratory experiments and also on the surface of gastric mucosa, suggesting possible reason for eradication failure by increasing resistance to antimicrobial agents and transmission. Aim : To examine the mature biofilm formation by H. pylori NCTC11637 standard strain in different incubation periods for H. pylori biofilm characterization.Article Citation - Scopus: 21Determination of Superoxide Dismutase Activities in Different Cyanobacteria for Scavenging of Reactive Oxygen Species(Taylor and Francis Ltd., 2015) Güneş, Seda; Tamburacı, Sedef; İmamoğlu, Esra; Dalay, Meltem ConkThere is considerable interest in cyanobacteria as sources of antioxidant pigments, antiinflammatory substances, enzymes such as superoxide dismutase (SOD) and vitamins. Antioxidant enzymes have significant role in the removal of reactive oxygen species produced during visible and ultraviolet irradiance stress in cyanobacteria. One of the most ubiquitous protective enzyme is superoxide dismutase (SOD). Most of cyanobacteria are known to have both FeSOD and MnSOD which are associated with photosystem I and II. These enzymes are responsible for scavenging superoxide radicals.Spirulina platensis and Synechococcus nidulans are widely used cyanobacteria as food supplement and cosmetic due to their bioactive compounds. Although the chemical composition of S.platensis has been investigated by many researchers, research on the relationship between protein content and comparison of SOD activity with other cyanobacteria is limited.Among several SOD producing cyanobacteria, the most promising organisms were investigate in terms of SOD activities in this study. The aim of the present work was to investigate and compare the SOD activities of different cyanobacteria including S. platensis, Pseudanabeana sp., S. nidulans and associate with protein contents. SOD activities of these cyanobacteria were determined by xanthine/xanthineoxidase method.Modified Lowry method was used for protein determination. The analysis results showed that the maximum specific SOD activity obtained was 50.4 U/mg from S.nidulans and the minimum specific SOD activity was 18.4 U/mg from Pseudanabeana sp. Total protein amount of S. nidulans, S. platensis, Pseudanabeana sp. was determined as 0.25 mg/ml, 0.27 mg/ml and 0.43 mg/ml respectively. As a result, Synechococcus nidulans was more efficient at scavenging peroxide radicals than Pseudanabeana sp. © 2015, © 2015 Har Krishan Bhalla & Sons.Doctoral Thesis Development of Novel Chitosan Nanocomposites as a Controlled Drug Release System for Helicobacter Pylori Treatment(İzmir Institute of Technology, 2016) Güneş, Suna Seda; Tıhmınlıoğlu, Funda; Yılmaz, ÖzlemHelicobacter pylori is one of the most common bacterial infection and responsible for gastroduodenal diseases in humans. Due to increasing failure rate of currently used antibiotic therapies, newer drugs and therapeutic approaches are needed. Therefore the use of encapsulated cinnamon bark oil is a promising approach for H. pylori eradication. The main objective of this dissertation was to develop a novel drug delivery system using chitosan and nanoclay containing cinnamon bark oil to be released in a controlled manner in gastrointestinal system for H. pylori eradication as an alternative or complementary to conventional antibiotic treatment. Minimum inhibition concentration (MIC) value of cinnamon bark oil was determined. Cinnamon bark oil loaded chitosan nanocomposite microspheres were produced by spray drying. The prepared microspheres were characterized for particle size & morphology, encapsulation efficiency, surface charge, mucoadhesion, degradation, swelling and drug release. Antimicrobial activity of the microspheres against H. pylori were investigated. In vitro cell viability of fibroblast and gastric epithelial cells were evaluated. In vitro cellular uptake and binding studies of microspheres were investigated by using gastric epithelial cells. MIC value of cinnamon bark oil was found as 8 μg/mL. Nanoclay incorporation decreased the biodegradation of nanocomposite microspheres and improved the release of cinnamon bark oil. Drug release mechanism was anomalous diffusion which refers to combination of diffusion and erosion controlled. The prepared microspheres showed strong mucoadhesive property. Oil released from prepared microspheres inhibited H. pylori growth. Although cinnamon oil showed cytotoxic effect above 31 μg/mL, the oil encapsulated chitosan microspheres did not show any cytotoxic effect on NIH3T3 and MKN45 cells. The prepared microspheres were able to get internalized into MKN45 cells and had great incorporation activity. The results of this study demonstrated that cinnamon bark oil loaded chitosan nanocomposites may serve as biocompatible and effective gastroretentive drug carrier for the treatment of H. pylori infection.Conference Object Investigation of Antimicrobial Activity To Determine Mic Value of Cinnamon Bark Oil Against Helicobacter Pylori(Wiley, 2014) Güneş, Seda; Becerikli, T.; Tıhmınlıoğlu, Funda; Yılmaz, Özlem[No abstract available]Article Citation - WoS: 32Citation - Scopus: 36A Novel Bilayer Zein/Mmt Nanocomposite Incorporated With H. Perforatum Oil for Wound Healing(Springer, 2020) Güneş, Seda; Tamburacı, Sedef; Tıhmınlıoğlu, FundaRecently, layered structures composed of nanofibers have gained attention as a novel material to mimic skin tissue in wound healing applications. The aim of this study is to develop a novel hybrid bilayer material composed of zein based composite film and nanofiber layers as a wound dressing material. The upper layer was composed of H. perforatum oil incorporated zein film including MMT and the bottom layer was comprised of 3D electrospun zein/MMT nanofibers to induce wound healing with the controlled release of H. perforatum oil. The bilayer composites were characterized in terms of mechanical test, WVP, water uptake and surface wettability. Antimicrobial activity of the wound dressings against microorganisms were investigated by disc diffusion method. In vitro cytotoxicity of monolayer film and bilayer structure was performed using WST-1 assay on HS2 keratinocyte and 3T3 cell lines. Results indicated that the prepared monolayer films showed appropriate mechanical and gas barrier properties and surface wettability for wound healing. Controlled release of H. perforatum oil was obtained from fabricated membranes up to 48 h. Bilayer membranes showed antimicrobial activity against E. coli, S. aureus, and C. albicans and did not show any toxic effect on NIH3T3 mouse fibroblast and HS2 keratinocyte cell lines. In vitro scratch assay results indicated that H. perforatum oil had a wound healing effect by inducing fibroblast migration. The proliferation study supported these results by increasing fibroblast proliferation on H. perforatum oil loaded bilayer membranes.Article Citation - WoS: 73Citation - Scopus: 94In Vitro Evaluation of Spirulina Platensis Extract Incorporated Skin Cream With Its Wound Healing and Antioxidant Activities(Taylor & Francis, 2017) Güneş, Seda; Tamburacı, Sedef; Conk Dalay, Meltem; Deliloğlu Gürhan, İsmetContext: Algae have gained importance in cosmeceutical product development due to their beneficial effects on skin health and therapeutical value with bioactive compounds. Spirulina platensis Parachas (Phormidiaceae) is renowned as a potential source of high-value chemicals and recently used in skincare products. Objective: This study develops and evaluates skin creams incorporated with bioactive S. platensis extract. Materials and methods:Spirulina platensis was cultivated, the aqueous crude extract was prepared and in vitro cytotoxicity of S. platensis extract in the range of 0.001-1% concentrations for 1, 3 and 7d on HS2 keratinocyte cells was determined. Crude extracts were incorporated in skin cream formulation at 0.01% (w/w) concentration and in vitro wound healing and genotoxicity studies were performed. Immunohistochemical staining was performed to determine the collagen activity. Results: 0.1% S. platensis extract exhibited higher proliferation activity compared with the control group with 198% of cell viability after 3 d. Skin cream including 1.125% S. platensis crude extract showed enhanced wound healing effect on HS2 keratinocyte cell line and the highest HS2 cell viability % was obtained with this concentration. The micronucleus (MN) assay results indicated that S. platensis extract incorporated creams had no genotoxic effect on human peripheral blood cells. Immunohistochemical analysis showed that collagen 1 immunoreactivity was improved by increased extract concentration and it was strongly positive in cells treated with 1.125% extract incorporated skin cream. Conclusions: The cell viability, wound healing activity and genotoxicity results showed that S. platensis incorporated skin cream could be of potential value in cosmeceutical and biomedical applications.