Master Degree / Yüksek Lisans Tezleri

Permanent URI for this collectionhttps://hdl.handle.net/11147/3008

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Department: search.filters.department.Thesis (Master)--İzmir Institute of Technology, BioengineeringSubject: search.filters.subject.Encapsulation

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  • Master Thesis
    Development of Doxorubicin-Loaded Liposomes Self-Assembled With Polysaccharides for Breast Cancer Therapy
    (01. Izmir Institute of Technology, 2023) Kılıç Özdemir, Sevgi; Polat, Hürriyet; Kılıç Özdemir, Sevgi; Polat, Hürriyet; 04.01. Department of Chemistry; 03.02. Department of Chemical Engineering; 03. Faculty of Engineering; 04. Faculty of Science; 01. Izmir Institute of Technology
    This thesis aimed to develop Tariquidar and Doxorubicin-loaded liposomes decorated by Fucoidan coating for breast cancer treatment. Fucoidan is a negatively charged polysaccharide with a special affinity to p-selectins expressed on MDA-MB-231 breast cancer cells and, at the same time, possesses anti-cancer activity. Different liposomes were prepared by extrusion method from the DSPC, Cholesterol, and cationic lipid DSTAP mixtures for coating negatively charged Fucoidan. The most stable liposomes with a size of 200 nm were obtained at a molar ratio of DSPC/Cholesterol/DSTAP:55/30/15, exhibiting a zeta potential above +30 mV. Tariquidar was encapsulated into the liposome bilayer by passive loading, and Doxorubicin into the core of the liposome by active loading. In the final step, liposomes were coated with Fucoidan by electrostatic interaction. Tariquidar loading was determined by UV-Vis spectrophotometry, indicating an optimum TRQ/Lipid molar ratio of 0.012 with encapsulation and loading efficiencies of 50% and 20%, respectively. Fluorescence spectrophotometry determined Doxorubicin loading, showing insignificant encapsulation efficiency change (exhibiting around 70%) by neither Tariquidar content in the bilayer nor DSTAP% in the formulation. An optimum amount of Fucoidan was determined by incubating the liposomes with varying amounts of fucoidan at different dilutions. Size and zeta potential measurements monitored the coating of liposomes with Fucoidan. Our finding showed that zeta potentials of liposomes go from positive to negative with increasing fucoidan, while no trend was observed in the size of liposomes. However, smaller sizes were observed when incubation was performed in diluted solutions.
  • Master Thesis
    Synthesizing of Olive Leaf Exteact Loaded Calcium Alginate Chitosan Microcapsules and Investigation of Their Anticancer Activity on Cancer Cells
    (Izmir Institute of Technology, 2014) Bal, Yıldız; Şanlı Mohamed, Gülşah; Bayraktar, Oğuz; Şanlı Mohamed, Gülşah; Bayraktar, Oğuz; 03.02. Department of Chemical Engineering; 04.01. Department of Chemistry; 03. Faculty of Engineering; 04. Faculty of Science; 01. Izmir Institute of Technology
    As we all know there are too many diseases which can be counted as fatal. But cancer is one of the most terrifying one for human race. Moreover, breast cancer in females and lung cancer in males are the most common cancer types. Although there are so many treatment methods, they have severe side effects. On the other hand, mother earth is so willing to give her hand and open all of the sources she got. O. europaea is one of the most important valuable source and Mediterranean area is blessed with that source. Olive and olive products may play an important role in cancer prevention. However, there are some limitations on their direct usage. Since encapsulation technology can seal valuable things into small capsules, it can be used to alleviate these limitations. In this study, the aim was figure the limitations of olive leaf extract (OLE) out with the encapsulation technology and enhance the effectiveness. Moreover, assess this effectiveness on cancer cell lines. Thus, OLE loaded calcium alginate (OLE-Ca-Alg) capsules produced by ionic-crosslinking. To limit the loss of OLE, capsules were coated with chitosan (CS) and OLE loaded chitosan calcium alginate (OLE-CS-Ca-Alg) were produced–two stage procedure. Optimization studies and characterization of the microcapsules were carried out. To investigate their anticancer effectiveness cytotoxicity, cell cycle and apoptosis analysis were performed for lung and breast cancer cell lines besides cytotoxic effects of the capsules were compared with healthy cell line. Additionally, visual observations were done by optical microscopy. Consequently, results showed OLE loaded capsules are more cytotoxic than free OLE. These effects were supported with cell cycle, apoptosis analysis and optical microscopy observations. In contrast none of compounds was cytotoxic for healthy cells. Thus, it can be concluded that our results will enhance the drug industry as it is a new approach for anticancer drugs and biocompatible material for biomedical applications.