Person: ÇAM, MUHAMMET EMİN
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ÇAM
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MUHAMMET EMİN
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Publication Metadata only Development of Satureja cuneifolia-loaded sodium alginate/polyethylene glycol scaffolds produced by 3D-printing technology as a diabetic wound dressing material(ELSEVIER, 2020) OKTAR, FAİK NÜZHET; Ilhan, Elif; Cesur, Sumeyye; Guler, Ece; Topal, Fadime; Albayrak, Deniz; Guncu, Mehmet Mucahit; Cam, Muhammet Emin; Taskin, Turgut; Sasmazel, Hilal Turkoglu; Aksu, Burak; Oktar, Faik Nuzhet; Gunduz, OguzhanAcute wounds are a common health problem, with millions of people affected and decreased granulation tissue formation and vascularization, it is also a big challenge for wound care researchers to promote acute wound healing around the globe. This study aims to produce and characterize Satureja cuneifolia plant extract (SC) blended with sodium alginate (SA) /polyethylene glycol (PEG) scaffolds for the potential treatment of diabetic ulcer. SA/PEG scaffolds were prepared by adding different concentrations (1, 3, and 5 wt%) of PEG to 9 wt% SA. The morphological and chemical composition of the resulting 3D printed composite scaffolds was determined using scanning electron microscopy (SEM) and Fourier transforms infrared spectroscopy (FTIR), respectively. Mechanical and thermal properties, swelling, and degradation behaviours were also investigated. The release kinetics of SC were performed. The antimicrobial analysis was evaluated against Escherichia coli and Staphylococcus aureus strains. 3D printed scaffolds have shown an excellent antibacterial effect, especially against gram-positive bacteria due to the antibacterial SC extract they contain. Furthermore, the cell viability of fibroblast (L929) cells on/within scaffolds were determined by the colourimetric MTT assay. The SA/PEG/SC scaffolds show a great promising potential candidate for diabetic wound healing and against bacterial infections. (c) 2020 Elsevier B.V. All rights reserved.Publication Metadata only Dapagliflozin attenuates depressive-like behavior of male rats in the forced swim(ELSEVIER, 2019) YAVUZ, AYŞE NUR; Cam, M. E.; Hazar-Yavuz, A. N.; Yildiz, S.; Keles, R.; Ertas, B.; Kabasakal, L.Publication Open Access A novel treatment strategy for preterm birth: Intra-vaginal progesterone-loaded fibrous patches(ELSEVIER, 2020-10) YAVUZ, AYŞE NUR; Cam, Muhammet Emin; Hazar-Yavuz, Ayse Nur; Cesur, Sumeyye; Ozkan, Ozan; Alenezi, Hussain; Sasmazel, Hilal Turkoglu; Eroglu, Mehmet Sayip; Brako, Francis; Ahmed, Jubair; Kabasakal, Levent; Ren, Guogang; Gunduz, Oguzhan; Edirisinghe, MohanProgesterone-loaded poly(lactic) acid fibrous polymeric patches were produced using electrospinning and pressurized gyration for infra-vaginal application to prevent preterm birth. The patches were intravaginally inserted into rats in the final week of their pregnancy, equivalent to the third trimester of human pregnancy. Maintenance tocolysis with progesterone-loaded patches was elucidated by recording the contractile response of uterine smooth muscle to noradrenaline in pregnant rats. Both progesterone-loaded patches indicated similar results from release and thermal studies, however, patches obtained by electrospinning had smaller average diameters and more uniform dispersion compared to pressurized gyration. Patches obtained by pressurized gyration had better results in production yield and tensile strength than electrospinning; thereby pressurized gyration is better suited for scaled-up production. The patches did not affect cell attachment, viability, and proliferation on Vero cells negatively. Consequently, progesterone-loaded patches are a novel and successful treatment strategy for preventing preterm birth.Publication Metadata only Vitamin D-3/vitamin K-2/magnesium-loaded polylactic acid/tricalcium phosphate/polycaprolactone composite nanofibers demonstrated osteoinductive effect by increasing Runx2 via Wnt/beta-catenin pathway(ELSEVIER, 2021) ÇAM, MUHAMMET EMİN; Guler, Ece; Baripoglu, Yaren Ezgi; Alenezi, Hussain; Arikan, Ayca; Babazade, Ravana; Unal, Semra; Duruksu, Gokhan; Alfares, Fawzan S.; Yazir, Yusufhan; Oktar, Faik Nuzhet; Gunduz, Oguzhan; Edirisinghe, Mohan; Cam, Muhammet EminVitamin D3, vitamin K2, and Mg (10%, 1.25%, and 5%, w/w, respectively)-loaded PLA (12%, w/v) (TCP (5%, w/ v))/PCL (12%, w/v) 1:1 (v/v) composite nanofibers (DKMF) were produced by electrospinning method (ES) and their osteoinductive effects were investigated in cell culture test. Neither pure nanofibers nor DKMF caused a significant cytotoxic effect in fibroblasts. The induction of the stem cell differentiation into osteogenic cells was observed in the cell culture with both DKMF and pure nanofibers, separately. Vitamin D3, vitamin K2, and magnesium demonstrated to support the osteogenic differentiation of mesenchymal stem cells by expressing Runx2, BMP2, and osteopontin and suppressing PPAR-gamma and Sox9. Therefore, the Wnt/beta-catenin signaling pathway was activated by DKMF. DKMF promoted large axonal sprouting and needle-like elongation of osteoblast cells and enhanced cellular functions such as migration, infiltration, proliferation, and differentiation after seven days of incubation using confocal laser scanning microscopy. The results showed that DKMF demonstrated sustained drug release for 144 h, tougher and stronger structure, higher tensile strength, increased water up-take capacity, decreased degradation ratio, and slightly lower Tm and Tg values compared to pure nanofibers. Consequently, DKMF is a promising treatment approach in bone tissue engineering due to its osteoinductive effects.Publication Open Access Experimental and theoretical investigation of the fluid behavior during polymeric fiber formation with and without pressure(AMER INST PHYSICS, 2019-12) ÇAM, MUHAMMET EMİN; Alenezi, Hussain; Cam, Muhammet Emin; Edirisinghe, MohanThe fabrication of polymeric micro/nanofibers is gaining attention due to their use in an array of applications including tissue engineering scaffolds, nanosensors, and fiber-reinforced composites. Despite their versatile nature, polymeric fibers are widely underutilized due to the lack of reliable, large-scale production techniques. Upon the discovery of centrifugal spinning and, recently, pressurized gyration techniques, new research directions have emerged. Here, we report a comprehensive study detailing the optimal conditions to significantly improve the morphology, homogeneity, and yield of fibers of varying diameters. A series of polymeric fibers was created using a 21 wt.% solution of polyethylene oxide in distilled water and the fluid behavior was monitored inside a transparent reservoir using a high-speed camera. Fabrication of the fibers took less than 1 s. Using centrifugal spinning, we studied the formation of the fibers at three different rotational speeds, and for pressurized gyration, one rotational speed was studied with three different nitrogen gas pressures. Using the pressurized gyration technique at a gas pressure of 0.3 MPa, there was significant improvement in the production yield of the fibers. We found a strong correlation between the variation of pressure and the rate of the solution leaving the reservoir with the improved morphology of the fibers. The use of reduced power techniques, like centrifugal spinning and pressured gyration, to yield high-quality nonwoven nanofibers and microfibers in large quantities is important due to their use in rapidly expanding markets. (C) 2019 Author(s).Publication Metadata only Investigation of antioxidant and anticonvulsant activity of Hypericum triquetrifolium Turra(2022-01-01) ÇAM, MUHAMMET EMİN; TAŞKIN, TURGUT; Kirmizi Sonmez N. I. , Guler E., ÇAM M. E. , Ermanoglu M., Gurdal B., TAŞKIN T., Omurtag G. Z.© 2022 Marmara University Press.Epilepsy is a state characterized by sudden, recurrent epileptic seizures that are not initiated by an identifiable event. There are various studies has been shown that Hypericum species may be used for their anticonvulsant potentials. Besides, the relationship between anticonvulsant activity and antioxidant effect has already been shown in the literature. In the current study, H. triquetrifolium was investigated for the first time for its potential antioxidant and anticonvulsant potential using in vitro and in vivo test models. H. triquetrifolium extracts were tested with DPPH assay, FRAP assay, copper (II) ion reducing antioxidant capacity assay, and acetylcholinesterase inhibitory activity assay to understand their antioxidant potential. Especially, methanolic extract of H. triquetrifolium was shown the highest antioxidant activity. Moreover, a pentylenetetrazole (PTZ, 80 mg/kg, i.p.)-induced seizure model was conducted to analyze the anticonvulsant activities of H. triquetrifolium extracts in mice. In addition, this study revealed that H. triquetrifolium decreased the ratio of severe seizures and increased the mean onsite of mortality and survival rate in a dose-dependent manner. It is thought that the anticonvulsant effect may be either related to the antioxidant potential of H. triquetrifolium or its interference in the GABAergic system.Publication Metadata only Controlled release of donopezil-loaded polyvinyl alcohol (pva) microbubbles/nanoparticles using microfluidic t-junction device(2020-09-18) CESUR, SÜMEYYE; ÇAM, MUHAMMET EMİN; GÜNDÜZ, OĞUZHAN; Cesur S., Çam M. E., Gündüz O.Production of donepezil- loaded microbubble/nanoparticles for treatment of Alzheimer diseasePublication Open Access Camellia Sinensis Leaves Hydroalcoholic Extract Improves the Alzheimer's Disease-Like Alterations Induced by Type 2 Diabetes in Rats(MARMARA UNIV, INST HEALTH SCIENCES, 2020-06-29) ÇAM, MUHAMMET EMİN; Cam, Muhammet Emin; Taskin, TurgutObjective: Novel investigations have confirmed that hyperglycemia is strictly associated with the development of cognitive impairment and dementia. Sodium-dependent glucose transporter (SGLT) inhibitors, which are oral antidiabetic drugs, are currently being investigated as the medication in Alzheimer's disease (AD). In our study, Camellia sinensis (green tea), which inhibits sodium-dependent glucose transporter-1 (SGLT-1), was used in the treatment of type 2 diabetes mellitus (T2DM)-induced AD-like alterations via its antidiabetic effects. Methods: High-fat diet/streptozotocin-treated rat model was chosen to provide T2DM-induced AD-like alterations. Antidiabetic effects were evaluated with the measurement of blood glucose level (BGL), oral glucose tolerance test (OGTT), and insulin tolerance test (ITT). On the other hand, novel object recognition test (NORT), open field test (OFT), passive avoidance test (PAT), and Morris's water maze (MWM) test were performed to investigate the anti-Alzheimer's effects of C. Sinensis. Results: C. sinensis tolerated BGL for a short time but metformin, the first medication prescribed for T2DM, tolerated BGL during the test for 120 min. C. sinensis increased the number of square crosses and the frequency of grooming activity in a similar manner to metformin in OFT. C. sinensis treatment improved exploratory behavior and memory retention components in NORT. The step-through latency decreased in HFD/STZ-treated rat model but it improved with metformin and C. sinensis treatment in PAT. According to the results obtained by the MWM test, C. sinensis treatment slightly improved learning. Conclusion: C. sinensis improved short-term memory and increased the locomotor activity in rats according to the results obtained by NORT, OFT, and PA.Publication Metadata only Fabrication, characterization and fibroblast proliferative activity of electrospun Achillea lycaonica-loaded nanofibrous mats(PERGAMON-ELSEVIER SCIENCE LTD, 2019) KABASAKAL, LEVENT; Cam, Muhammet Emin; Cesur, Sumeyye; Taskin, Turgut; Erdemir, Gokce; Kuruca, Durdane Serap; Sahin, Yesim Muge; Kabasakal, Levent; Gunduz, OguzhanThe use of natural compounds such as biocompatible and non-toxic plant extracts, without undesired side effects, in tissue engineering applications, is highly preferred compared to chemical drugs. In this study, the characterization and performance of electrospun Achillea lycaonica-loaded (0.125, 0.250 and 0.500, wt%) poly (lactic acid) (PLA) (8%, w/v) nanofibrous mats for skin tissue engineering were investigated. SEM, FTIR, DSC, and tensile strength test of the electrospun nanofibers have been investigated. Drug releasing test and cell culture study were also carried out. Achillea lycaonica-loaded nanofibrous mats in 0.250 (wt%) and 0.500 (wt%) demonstrated excellent cell compatibility and increased the viability of NIH/3T3 (mouse embryo fibroblast) cells within 72 h. According to the results, Achillea lycaonica-loaded PLA nanofibers have proper tensile strength and controlled release. The working temperature range enlarged for the composites having higher plant extract content. Consequently, Achillea lycaonica-loaded nanofibrous mats have a great potential in skin tissue engineering applications.Publication Metadata only Controlled Release of Metformin Loaded Polyvinyl Alcohol (PVA) Microbubble/Nanoparticles Using Microfluidic Device for the Treatment of Type 2 Diabetes Mellitus(Springer, 2020) SAYIN, FATİH SERDAR; Cesur S., Cam M.E., Sayın F.S., Su S., Gunduz O.Nowadays it became obvious that a relentless increase in Type 2 diabetes mellitus (T2DM), affecting the economically affluent countries, is gradually afflicting also the developing world. The currently used drugs in the treatment of T2DM have inefficient glucose control and carry serious side effects. In this study, nano-sized uniform particles were produced by microfluidic method by the explosion of microbubbles. Morphological (SEM), molecular interactions between the components (FT-IR), drug release test by UV spectroscopy measurement were carried out after production process. When microbubbles and nanoparticles, optical microscope and SEM images obtained were examined, it was observed that metformin was successfully loaded into nanoparticles. The diameter of the microbubbles and nanoparticles was 104 ± 91 µm and 116 ± 13 nm, respectively. Metformin was released in a controlled manner at pH 1.2 for 390 min. It is promising in the treatment of T2DM with the controlled release ability of metformin loaded nonoparticles. © Springer Nature Switzerland AG 2020.