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    Biochemical effect evaluation of microbial chondroitin sulphate in experimental knee osteoarthritis model
    (Erenler, Ayse Sebnem; Karabulut, Aysun Bay; Otlu, Onder, 2022) Erenler, Ayse Şebnem; Bay Karabulut, Aysun; Sevimli, Resit; Geçkil, Hikmet; Akpolat, Nusret; Ünver, Tuba; Otlu, Önder
    Osteoarthritis (OA) is the most commonchronic joint disease, primarily due to aging.Chondroitin sulfate (CS) is a glycosaminoglycan(GAG) commonly used to treat osteoarthritis. CS candelay the progression of pathology or reversemorphological changes in joint structure.Traditionally CS is produced from animal sources.However, due to different reasons such ascontamination, ecological risA, and the possibility ofinfectious diseases, the trend towards microbialsources has increased because of its advantages suchas purer, more antiallergic, and lower MolecularWeight (MW) than animal sources. Biochemicalanalysis of Microbial CS (MCS), which is a new andsignificant alternative as a source of CS in the OAhealing process, has not been evaluated in theliterature yet. This study was designed to analyze thebiochemical effects of MCS produced by our teamfrom a microbial source, with an MW value of 269Daltons, on the osteoarthritis healing processcompared to the commercial form. We aim to reachdata that MCS has a higher antioxidant effect thananimalYsourced CS, and in this way, it is a moresuitable production for the treatment ofosteoarthritis. In this study, Anee osteoarthritis wassurgically induced in experimental rabbits; and TGFY1?, CAT, MPO, TOS, and OSI parameters measuredin blood samples before the operation and after thehealing period were analyzed comparatively. Afterthe surgical application, the rabbits were randomlydivided into three groups: control, animalYsourcedCS, and E. coli sourced MCS. The standard rabbitdiet was administered daily to 10 rabbits in Group 1(control), and CS and MCS were applied daily to theother groups as 17 mg/Ag for 12 weeAs. Bloodsamples were taAen from rabbits at the 12th weeAafter surgery, and TGFY1?, CAT, MPO, TOS, andOSI parameters were biochemically evaluated. Thisstudy has confirmed that the antioxidant propertiesof MCS and data on its effectiveness in controllingoxidative stress compared to animalYsourced CS.Based on these results, it can be concluded that MCShas a significant potency of nutraceutical andtherapeutic agents for OA treatment.
  • Küçük Resim Yok
    Öğe
    BIOCHEMICAL EFFECT EVALUATION OF MICROBIAL CHONDROITIN SULPHATE IN EXPERIMENTAL KNEE OSTEOARTHRITIS MODEL
    (Parlar Scientific Publications (P S P), 2022) Erenler, Ayse Sebnem; Karabulut, Aysun Bay; Sevimli, Resit; Geckil, Hikmet; Akpolat, Nusret; Unver, Tuba; Otlu, Onder
    Osteoarthritis (OA) is the most common chronic joint disease, primarily due to aging. Chondroitin sulfate (CS) is a glycosaminoglycan (GAG) commonly used to treat osteoarthritis. CS can delay the progression of pathology or reverse morphological changes in joint structure. Traditionally CS is produced from animal sources. However, due to different reasons such as contamination, ecological risk, and the possibility of infectious diseases, the trend towards microbial sources has increased because of its advantages such as purer, more antiallergic, and lower Molecular Weight (MW) than animal sources. Biochemical analysis of Microbial CS (MCS), which is a new and significant alternative as a source of CS in the OA healing process, has not been evaluated in the literature yet. This study was designed to analyze the biochemical effects of MCS produced by our team from a microbial source, with an MW value of 269 Daltons, on the osteoarthritis healing process compared to the commercial foiut. We aim to reach data that MCS has a higher antioxidant effect than animal -sourced CS, and in this way, it is a more suitable production for the treatment of osteoarthritis. In this study, knee osteoarthritis was surgically induced in experimental rabbits; and TGF113, CAT, MPO, TOS, and OSI parameters measured in blood samples before the operation and after the healing period were analyzed comparatively. After the surgical application, the rabbits were randomly divided into three groups: control, animal -sourced CS, and E. cull sourced. MCS. The standard rabbit diet was administered daily to 10 rabbits in Group 1 (control), and. CS and MCS were applied daily to the other groups as 17 mg/kg for 12 weeks. Blood samples were taken from rabbits at the 12th week after surgery, and TGF-113, CAT, MPO, TOS, and OSI parameters were biochemically evaluated. This study has confirmed that the antioxidant properties of MCS and data on its effectiveness in controlling oxidative stress compared to animal -sourced CS. Based on these results, it can be concluded that MCS has a significant potency of nutraceutical and therapeutic agents for OA treatment.
  • Küçük Resim Yok
    Öğe
    Preparation, characterization, and biocompatibility of chondroitin sulfate-based sol-gel coatings and investigation of their effects on osseointegration improvement
    (Taylor & Francis As, 2023) Pasahan, Aziz; Sevimli, Resit; Kivilcim, Nilufer; Acari, Idil Karaca; Erenler, A. Sebnem; Sezer, Selda; Durmat, H. Turgut
    In this work, implants with enhanced antibacterial and surface properties besides mechanical, biological, and chemical properties were prepared with the replacement of traditional titanium and titanium alloys in the field of biomedical materials. Titanium substrates were coated with chondroitin sulfate (CS) containing (3-glycidoxypropyl)trimethoxysilane (GLYMO) and tetraethoxysilane (TEOS) based thin film using sol-gel technology. Chondroitin sulfate is a preferred material due to its characteristics antioxidative and osseointegresion properties besides its collagen-forming properties. Coated implants were morphologically elucidated with atomic force microscopy (AFM), and scanning electron microscopy (SEM). The structure of the chondroitin sulfate-containing films was investigated with Fourier Transform Infrared Spectroscopy (FTIR) and Energy Dispersive X-Ray Analysis (EDX) techniques. The obtained CS-based sol-gel surface coatings are thermally stable up to similar to 200 degrees C according to TGA and DTA analysis results. The biological and antibacterial properties of the coatings were also determined. The biocompatibility and osseointegration properties of the coatings developed within the scope of the study were, determined by in vivo studies on rats. According to biocompatibility results of CS/Sol-Gel coated surfaces, Cell viability (%) rates of CS-based coatings showed between 89 and 66%. According to the experimental data, it has been claimed that implants improved with antibacterial, stable, homogeneous, and biocompatible coatings can be used as a new alternative product for dental and orthopedic applications.