Ong Chik Ying Rose. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (leaves 181-195). / Abstracts in English and Chinese. / Acknoledgements --- p.i / List of Abbreviations --- p.ii / Abstract --- p.iii / Abstract in Chinese --- p.v / List of Publications and Abstracts --- p.vii / List of Figures --- p.viii / List of Tables --- p.xi / Contents --- p.xii / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Saponins --- p.3 / Chapter 1.1.1 --- Structure of saponins --- p.3 / Chapter 1.1.2 --- Occurrence of saponins --- p.7 / Chapter 1.1.3 --- Bioactivities of saponins --- p.8 / Chapter 1.2 --- Paris Polyphylla --- p.9 / Chapter 1.2.1 --- Chonglou --- p.11 / Chapter 1.3 --- Polyphyllin D --- p.12 / Chapter 1.4 --- Apoptosis --- p.15 / Chapter 1.4.1 --- Apoptosis and necrosis --- p.16 / Chapter 1.4.2 --- Initiation phase of apoptosis --- p.16 / Chapter 1.4.2.1 --- Extrinsic apoptotic pathway --- p.18 / Chapter 1.4.2.2 --- Intrinsic apoptotic pathway --- p.19 / Chapter 1.4.3 --- Execution phase of apoptosis --- p.19 / Chapter 1.4.4 --- Termination phase of apoptosis --- p.20 / Chapter 1.5 --- Multi-drug resistance (MDR) --- p.21 / Chapter 1.5.1 --- MDR mediated by decreased drug accumulation --- p.21 / Chapter 1.5.2 --- MDR mediated by enhanced anti-oxidant enzyme activities --- p.25 / Chapter 1.5.3 --- MDR mediated by enhanced detoxification of drugs --- p.25 / Chapter 1.5.4 --- MDR mediated by enhanced DNA repair system --- p.26 / Chapter 1.5.5 --- MDR mediated by altered apoptotic pathway --- p.26 / Chapter 1.5.6 --- Current strategies for overcoming multidrug resistance in cancer --- p.27 / Chapter 1.6 --- Hepatocellular carcinoma (HCC) --- p.30 / Chapter 1.7 --- Objectives of project --- p.32 / Chapter Chapter 2 --- Materials and Methods --- p.33 / Chapter 2.1 --- Materials --- p.34 / Chapter 2.1.1 --- Culture of Cells --- p.34 / Chapter 2.1.1.1 --- Cell lines --- p.34 / Chapter 2.1.1.2 --- Preservation of Cells --- p.35 / Chapter 2.1.2 --- Culture Media --- p.36 / Chapter 2.1.2.1 --- RPMI 1640 (Phenol Red Medium) --- p.36 / Chapter 2.1.2.2 --- RPMI 1640 (Phenol Red-free Medium) --- p.36 / Chapter 2.1.3 --- Buffers and Reagents --- p.37 / Chapter 2.1.3.1 --- Buffer for Common Use --- p.37 / Chapter 2.1.3.2 --- Reagents for Annexin-V-FITC/PI Assay --- p.37 / Chapter 2.1.3.3 --- Reagents for Western Blotting Analysis --- p.37 / Chapter 2.1.4 --- Chemicals --- p.40 / Chapter 2.1.4.1 --- Fluorescence Dyes --- p.40 / Chapter 2.1.4.2 --- Antibodies --- p.41 / Chapter 2.1.4.3 --- Other Chemicals --- p.42 / Chapter 2.1.5 --- Summary of chemicals used in this study --- p.43 / Chapter 2.2 --- Methods --- p.48 / Chapter 2.2.1 --- In vitro Cell Cytotoxicity Assay --- p.48 / Chapter 2.2.1.1 --- AlamarBlue Assay --- p.48 / Chapter 2.2.2 --- Flow Cytometry --- p.50 / Chapter 2.2.2.1 --- Analysis by Flow Cytometry --- p.50 / Chapter 2.2.2.2 --- Determination of Apoptotic and Late Apoptotic/Necrotic Cells with Annexin-V-FITC/PI Cytometric Analysis --- p.50 / Chapter 2.2.2.3 --- Determination of Mitochondrial Membrane Potential in cells --- p.51 / Chapter 2.2.2.4 --- Determination of Hydrogen Peroxide (H2O2) Release in cells --- p.52 / Chapter 2.2.2.5 --- Measurement of doxorubicin accumulation in cells --- p.53 / Chapter 2.2.2.6 --- Determination of P-glycoprotein expression level in cells --- p.54 / Chapter 2.2.2.7 --- Determination of mitochondrial depolarization and swellingin isolated mitochondria --- p.54 / Chapter 2.2.3 --- Methods involved in DNA sequencing of MDRl promoter --- p.56 / Chapter 2.2.3.1 --- DNA extraction --- p.56 / Chapter 2.2.3.2 --- DNA and Gel Band Purification --- p.56 / Chapter 2.2.3.3 --- Assessment of DNA amount --- p.57 / Chapter 2.2.3.4 --- Polymerase Chain Reaction --- p.57 / Chapter 2.2.3.5 --- Agarose Gel Electrophoresis --- p.59 / Chapter 2.2.3.6 --- Preparation for DNA sequencing --- p.59 / Chapter 2.2.4 --- Western Blotting Analysis --- p.61 / Chapter 2.2.4.1 --- Preparation of Proteins from Cells --- p.61 / Chapter 2.2.4.2 --- Preparation of proteins from isolated mitochondria --- p.63 / Chapter 2.2.4.3 --- Protein analysis with Western analysis --- p.63 / Chapter 2.2.5 --- Confocal laser scanning microscopy (Confocal microscopy) --- p.66 / Chapter 2.2.5.1 --- Analysis with confocal microscopy --- p.66 / Chapter 2.2.5.2 --- Determination of mitochondrial changes in cells by confocal microscopy --- p.66 / Chapter 2.2.5.3 --- Determination of lysosomal rupture in cells by confocal microscopy --- p.67 / Chapter 2.2.6 --- Mitochondrial isolation --- p.68 / Chapter Chapter 3 --- Results 一 Resistance Mechanisms in RHepG2 cells --- p.69 / Chapter 3.1 --- Resistance of RHepG2 cells towards various chemical agents --- p.70 / Chapter 3.1.1 --- RHepG2 cells are resistant to doxorubicin --- p.70 / Chapter 3.1.2 --- RHepG2 cells are resistant to taxol --- p.72 / Chapter 3.1.3 --- RHepG2 cells are resistant to valinomycin --- p.74 / Chapter 3.2 --- Resistance mechanism in RHepG2 cells --- p.76 / Chapter 3.2.1 --- Reduced doxorubicin accumulation is observed in RHepG2 cells --- p.76 / Chapter 3.2.2 --- More P-glycoproteins on the cell surface was observed in RHepG2 cells --- p.80 / Chapter 3.2.3 --- Inhibition of P-glycoprotein activity increased doxorubicin accumulation in RHepG2 cells --- p.82 / Chapter 3.2.4 --- HepG2 and RHepG2 cells contain the same P-glycoprotein promoter region --- p.86 / Chapter 3.2.5 --- RHepG2 over-expressed Bcl-2 --- p.91 / Chapter 3.2.6 --- HepG2 and RHepG2 cells had the same level of Bax protein --- p.93 / Chapter Chapter 4 --- Results - Effects of Polyphyllin D in HepG2 and RHepG2 cells --- p.95 / Chapter 4.1 --- Cytotoxicity of Polyphyllin D in HepG2 and RHepG2 cells --- p.96 / Chapter 4.1.1 --- Polyphyllin D exhibited cytotoxic effect in both HepG2 and RHepG2 cells --- p.96 / Chapter 4.2 --- Apoptotic mechanism caused by Polyphyllin D in HepG2 and RHepG2 cells --- p.93 / Chapter 4.2.1 --- Polyphyllin D caused apoptosis in HepG2 and RHepG2 cells --- p.98 / Chapter 4.2.2 --- Polyphyllin D did not activate caspase8 --- p.103 / Chapter 4.2.3 --- Polyphyllin D did not concentrate on the plasma membrane of cells --- p.106 / Chapter 4.2.4 --- Polyphyllin D did not change Bcl-2 level in HepG2 and RHepG2 cells --- p.109 / Chapter 4.2.5 --- Polyphyllin D treatment enhanced Bax protein expression in both HepG2 and RHepG2 cells --- p.111 / Chapter 4.2.6 --- Polyphyllin D caused cytochrome c and AIF release in HepG2 and RHepG2 cells --- p.113 / Chapter 4.2.7 --- Polyphyllin D induced mitochondrial membrane depolarization in HepG2 and RHepG2 cells --- p.118 / Chapter 4.2.8 --- Polyphyllin D caused mitochondrial swelling in HepG2 and clustering of mitochondriain RHepG2 cells --- p.122 / Chapter 4.2.9 --- "Polyphyllin D caused H202 release in HepG2 and RHepG2 cells, and the cytotoxic effects of Polyphyllin D could be reduced by NAC" --- p.127 / Chapter 4.2.10 --- Polyphyllin D caused permeabilization of lysosomes --- p.132 / Chapter 4.3 --- Site of action of Polyphyllin D in cells --- p.135 / Chapter 4.3.1 --- Purity of isolated mitochondria --- p.135 / Chapter 4.3.2 --- Polyphyllin D caused cytochrome c release from the HepG2 and RHepG2 isolated mitochondria --- p.137 / Chapter 4.3.3 --- Polyphyllin D induced mitochondrial depolarization in HepG2 and RHepG2 isolated mitochondria --- p.139 / Chapter 4.3.4 --- Polyphyllin D caused mitochondrial swelling in HepG2 and RHepG2 isolated mitochondria --- p.142 / Chapter 4.4 --- Resistance reversal effects of Polyphyllin D in RHepG2 cells --- p.144 / Chapter 4.4.1 --- Polyphyllin D increased doxorubicin accumulation in RHepG2 cells --- p.144 / Chapter 4.4.2 --- P-glycoprotein expression was not down-regulated after Polyphyllin D treatment --- p.146 / Chapter 4.4.3 --- Co-treatment of doxorubicin with Polyphyllin D had enhanced cytotoxic effect --- p.148 / Chapter Chapter 5 --- Discussion - Resistance mechanisms in RHepG2 cells --- p.150 / Chapter 5.1 --- Resistance of RHepG2 cells towards various chemical reagents --- p.151 / Chapter 5.2 --- Resistance mechanisms in RHepG2 cells --- p.154 / Chapter Chapter 6 --- Discussion - Effects of Polyphyllin D in HepG2and RHepG2 cells --- p.159 / Chapter 6.1 --- Cytotoxicity of Polyphyllin D in HepG2 and RHepG2 cells --- p.160 / Chapter 6.2 --- Apoptotic mechanisms caused by Polyphyllin D in HepG2 and RHepG2 cells --- p.162 / Chapter 6.3 --- Site of action of Polyphyllin D in HepG2 andRHepG2 cells --- p.172 / Chapter 6.4 --- Resistance reversal effects of Polyphyllin D in RHepG2 cells --- p.175 / Chapter Chapter 7 --- Future Perspectives --- p.177 / Chapter Chapter 8 --- Conclusion --- p.179 / References
| Identifer | oai:union.ndltd.org:cuhk.edu.hk/oai:cuhk-dr:cuhk_324983 |
| Date | January 2004 |
| Contributors | Ong, Chik Ying Rose., Chinese University of Hong Kong Graduate School. Division of Biochemistry. |
| Source Sets | The Chinese University of Hong Kong |
| Language | English, Chinese |
| Detected Language | English |
| Type | Text, bibliography |
| Format | print, xix, 195 leaves : ill. (some col.) ; 30 cm. |
| Rights | Use of this resource is governed by the terms and conditions of the Creative Commons “Attribution-NonCommercial-NoDerivatives 4.0 International” License (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
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