Master Degree / Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/11147/3008
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Master Thesis Lab-on-a-chip devices for drug screening(Izmir Institute of Technology, 2019) Gökçe, Begüm; Pesen Okvur, Devrim; Çağır, AliBreast cancer is one of the cancers with the highest incidence and mortality rates in women in Turkey as well as in the world. Tumor micro environment comprises of cancer and normal cells, extracellular matrix, soluble biological and chemical factors. Research has shown that cell shape, adhesion, migration, response to growth factors and drugs are different in 2D and 3D culture. Today, only 8 out of 100 anti-cancer clinical trial gives effective results. 3D cell culture systems have shown to be a necessary step between in vitro, in vivo and clinical studies. Therefore, it is necessary to better understand the interactions of cancer cells with their micro environment, for which new cell culture setups are required. The most apparent disadvantage of widely used 3D cell culture setups is the lack of stromal cells. The systems to be developed should both provide a 3D environment and comprise multiple cell types. The drug screen in 3D tri-culture method with a lab-on-a-chip device, that will be developed in this study will be able to answer these needs. Cell lines that represent different breast cancer types alone or together with stromal cells were cultured in 3D in the to be developed lab-on-a-chip; by determining the effects of drugs with different targets on the viability and distribution of cells, a drug screening method is developed.Master Thesis Synthesis of Novel 6,7-Dihydro Derivatives(Izmir Institute of Technology, 2012) Kayar, Burcu; Çağır, AliIn last decades, biologically active natural compound (R)-goniothalamin and its derivatives received great attention from researchers. The reason for this interest is the wide range of biological properties of goniothalamin; including anti-microbial, antiprotozoan, anti-inflammatory, cytotoxic and anti-proliferative activities. The present study sets out the asymmetric large scale synthesis of α,β- unsaturated lactone derivative (R)-(+)-6-(2-Methylnaphthalen-1-yl)-5,6-dihydro-2Hpyran- 2-one. In recent studies, this linker modified analog of goniothalamin was shown to be cytotoxic against PC-3 (prostate cancer) and MCF-7 (human breast cancer) cell lines with half maximal inhibitory concentration values of 0.13 μM and 2.6 μM, respectively. The preparation of the target compound consists of three steps. First, asymmetric synthesis of homoallylic alcohol using (R)-Tol-BINAP AgF catalyst complex was performed with allyltrimethoysilane. After that, treating the chiral homoallylic alcohol with acryloylchloride in the presence of triethylamine followed by ring closing metathesis of acrylate ester using 1st generation Grubbs' catalyst finally yielded the lead compound. The large scale preparation of (R)-(+)-6-(2- Methylnaphthalen-1-yl)-5,6-dihydro-2H-pyran-2-one was achieved in order to evaluate its in-vivo anti-cancer activity in mice, and to study its mechanism of action in the cell. Additionally, synthesis of three new 7-membered β-ï § unsaturated lactone derivatives was carried out. Allylation reaction of corresponding aldehydes with allyltrimethoxysilane using CuCl-TBAT gave the racemic homoallylic alcohols. Coupling reactions of this homoallylic alcohol with 3-butenoic acid in the presence of DCC/DMAP yilded the esters. Ring closing metathesis of the related esters was studied by using 2nd generation Grubbs' catalyst.