Master Degree / Yüksek Lisans Tezleri

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Department: search.filters.department.Thesis (Master)--İzmir Institute of Technology, Molecular Biology and GeneticsSubject: search.filters.subject.Alkaloids

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Now showing 1 - 3 of 3
  • Master Thesis
    Proteomic analysis of benzylisoquninoline alkaloid (BIA) biosynthesis in different opium poppy cultivars and examination of differentially expressed proteins in relation to bia content
    (01. Izmir Institute of Technology, 2024) Frary, Anne; Frary, Anne; 04.03. Department of Molecular Biology and Genetics; 04. Faculty of Science; 01. Izmir Institute of Technology
    Haşhaş (Papaver somniferum), eczacılıkta kullanılan benzilizokinolin alkaloidleri (BIA) üretmesi nedeniyle Türkiye için stratejik öneme sahip bir bitkidir. Yalnızca haşhaş bitkisinden elde edilebilen bu alkaloidler, ağrı kesici, öksürük kesici ve narkotik amaçlı ilaç olarak yaygın şekilde kullanılmaktadır. Türkiye'nin haşhaş çeşitleri, yüksek BIA içeriği hedeflenerek geliştirilmiş olup küresel rekabet için verimlerinin artırılması gerekmektedir. Bu çalışmada, farklı haşhaş çeşitlerinin belirli organlarındaki protein seviyelerinin değişen BIA içeriği ile ilişkili olarak karşılaştırılmasını içeren proteomik bir yaklaşım kullanılmıştır. Çalışmada, belirli alkaloidler açısından öne çıkan üç Türk haşhaş çeşidi kullanılmıştır: tebain (TMO T), morfin (Ofis 2) ve noskapin (Ofis NM). Haşhaş bitkisinin belirli dokularından alınan protein ekstraktları, LC-MS/MS kullanılarak incelenmiş ve ardından kuru kapsüllerdeki BIA miktarı TLC/HPLC analizleriyle ölçülmüştür. Bu şekilde, farklı haşhaş çeşitlerinin ve organlarının protein ekspresyon modelleri ile kapsüllerdeki alkaloid birikimi arasındaki bağlantılar araştırılmış ve BIA metabolizmasının biyosentetik ve düzenleyici yollarına dair bilgi edinilmiştir. İncelenen beş doku arasında, olgun kapsüller en yüksek sayıda anlamlı farklı şekilde ifade edilen proteini gösterirken, Ofis 2 protein ifade profilleri açısından tüm dokularda TMO T ve Ofis NM'den belirgin şekilde ayrışmıştır. BIA yolağındaki kilit enzimler, üç haşhaş çeşidinin kapsülleri ve lateks içeren gövdeleri arasında anlamlı yukarı ve aşağı regülasyon göstermiştir. Gelecekteki araştırmalar, BIA biyosentezini aydınlatmak ve manipüle etmek için karakterize edilmemiş proteinlerin işlevlerini, çoklu omik entegrasyonunu, dokuya özgü enzim lokalizasyonunu ve işlevsel gen çalışmalarını araştırabilir. Bu sayede farmasötik amaçlar için yüksek verimli haşhaş çeşitlerinin geliştirilmesine olanak sağlanabilir.
  • Master Thesis
    Characterization of Glycoalkaloid Content and Molecular Mapping in Eggplant
    (Izmir Institute of Technology, 2006) Kırsoy, Öyküm; Frary, Anne; Frary, Anne; 04.03. Department of Molecular Biology and Genetics; 04. Faculty of Science; 01. Izmir Institute of Technology
    In this thesis, solamargine which is a known eggplant glycoalkaloid and has an important place for human health was characterized in eggplant. For characterization, two eggplant lines S.melongena MM738 and S.linnaeanum MM195 were used. Although, for identification and detection of glycoalkaloid concentration, many different methods have been utilized, for this thesis, high-performance liquid chromatography (HPLC) was used to analyze glycoalkaloid concentration in eggplant. In HPLC, spiking of samples was done using a solamargine standard and it was found that S. melongena had an undetectable level of solamargine while S. linnaeanum had between 17.6 and 33.4 mg (average 25.5 ± 11) solamargine per gram of freeze dried powder. In addition to characterization of glycoalkaloids in S.melongena MM738 and S.linnaeanum MM195, different types of molecular markers were surveyed for polymorphism in S.melongena MM738 and S.linnaeanum MM195 for mapping. A total of 47 polymorphic markers were then tested on the F2 population and located on the eggplant molecular genetic map.
  • Master Thesis
    Genetic Mapping and Characterization of Eggplant for Glycoalkaloid Content
    (Izmir Institute of Technology, 2010) Gürbüz, Nergiz; Gürbüz, Nergiz; Doğanlar, Sami; Doğanlar, Sami; 04.03. Department of Molecular Biology and Genetics; 04. Faculty of Science; 01. Izmir Institute of Technology
    Most plants including eggplant, produce toxins against insects, pathogens and animals. The biggest class of these toxins is alkaloids. Generally plants produce alkaloids in a glycosidic form which are called glycoalkaloids. Glycoalkaloids have toxic effects on human health. For example, as a result of disrupting the cell membrane, the gastrointestinal track and other organs are damaged. Glycoalkaloids are not only toxic to human health but also they have beneficial effects. For example, they decrease cholesterol level, and have anticancer activity. And also they are used as a precursor for steroidal drugs. Therefore, isolation and determination of glycoalkaloids content is important. For this aim, column chromatography was performed and solamargine and solasonine were obtained. Totally 122,8 mg solamargine, solasonine and solamargine and solasonine mix from Solanum linnaeanum were obtained. Their identities were confirmed via 1H NMR and mass spectroscopy. For determination of glycoalkaloid content HPLC method was developed via changing different parameters such as mobile phase, pH, temperature, flow rate and column type. It was found that separation of glycoalkaloids by using RP column without phosphate buffer was not sufficient. On the other hand, separation of glycoalkaloids by using carbohydrate column was better but this type of column is not stable. Furthermore, linkage mapping was performed by using CAPs and SSR methods; and 385 COSII markers and 221 SSR markers were tested. Of the tested markers, 38 of the COS II markers and 28 of the SSR markers were found to be polymorphic. A total of 52 of these markers were mapped.