Wong Yuen Fan. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2000. / Includes bibliographical references (leaves 134-150). / Abstracts in English and Chinese. / ACKNOWLEDGMENTS --- p.i / ABSTRACT --- p.ii / LIST OF ABBREAIATIONS --- p.vii / TABLE OF CONTENTS --- p.ix / Chapter Chapter 1 --- General introduction / Chapter 1.1 --- History of Kudingcha --- p.1 / Chapter 1.2 --- Classification of Kudingcha --- p.1 / Chapter 1.3 --- Composition of Kudingcha --- p.3 / Chapter 1.4 --- Introduction to phenylethanoid glycosides --- p.4 / Chapter 1.4.1 --- Isolation and purification of phenylethanoid glycosides --- p.4 / Chapter 1.4.2 --- Taxonomy of phenylethanoid glycosides --- p.5 / Chapter 1.4.3 --- Structure of phenylethanoid glycosides --- p.5 / Chapter 1.4.4 --- Biosynthesis of phenylethanoid glycosides --- p.6 / Chapter 1.4.5 --- Pharmacological effects of phenylethanoid glycosides --- p.9 / Chapter 1.4.5.1 --- Anticarcinogenic activity --- p.10 / Chapter 1.4.5.2 --- Inhibitory activity of protein kinase C --- p.10 / Chapter 1.4.5.3 --- Immunosuppressive activity --- p.11 / Chapter 1.4.5.4 --- DNA repairing activity --- p.11 / Chapter 1.4.5.5 --- Antibacterial and antiviral activities --- p.11 / Chapter 1.4.5.6 --- Antiinflammatory and antinociceptive activities --- p.12 / Chapter 1.4.5.7 --- Hepatoprotective activity --- p.12 / Chapter 1.4.5.8 --- Inhibitory activity of xanthine oxidase --- p.13 / Chapter 1.4.5.9 --- Antioxidative and scavenging activities --- p.13 / Chapter Chapter 2 --- Isolation and purification of phenylethaonid glycosides in Kudingcha / Chapter 2.1 --- Introduction --- p.15 / Chapter 2.2 --- Objectives --- p.16 / Chapter 2.3 --- Materials and Methods --- p.17 / Chapter 2.3.1 --- Extraction and isolation --- p.17 / Chapter 2.3.2 --- High performance liquid chromatograph (HPLC)analysis --- p.19 / Chapter 2.3.2.1 --- "Acteoside, ligupurpuroside A and osmanthuside B" --- p.19 / Chapter 2.3.2.2 --- cis-Ligupurpuroside B and trans-ligupurpuroside B --- p.19 / Chapter 2.3.3 --- Isolation and purification of isoacteoside --- p.19 / Chapter 2.4 --- Results --- p.24 / Chapter 2.4.1 --- A cteoside --- p.24 / Chapter 2.4.2 --- Osmanthuside B --- p.24 / Chapter 2.4.3 --- Ligupurpuroside A --- p.24 / Chapter 2.4.4 --- trans-Ligupurpuroside B --- p.25 / Chapter 2.4.5 --- cis-Ligupurpuroside B --- p.25 / Chapter 2.4.6 --- Isoacteoside --- p.25 / Chapter 2.4.6.1 --- Thermal stability --- p.25 / Chapter 2.5 --- Discussions --- p.27 / Chapter 2.5.1 --- Acteoside --- p.27 / Chapter 2.5.2 --- Osmanthuside B --- p.27 / Chapter 2.5.3 --- Ligupurpuroside A --- p.28 / Chapter 2.5.4 --- trans-Ligupurpuroside B --- p.29 / Chapter 2.5.5 --- cis-Ligupurpuroside B --- p.29 / Chapter 2.5.6 --- Isoacteoside --- p.30 / Chapter Chapter 3 --- Inhibitory effect of phenylethanoid glycosides isolated from Kudingcha on Cu2+-mediated LDL oxidation in vitro / Chapter 3.1 --- Introduction --- p.36 / Chapter 3.2 --- Mechanisms of lipoprotein oxidation in vivo --- p.36 / Chapter 3.2.1 --- Oxidants underlying LDL oxidation --- p.36 / Chapter 3.2.2 --- Oxidative modification of LDL --- p.37 / Chapter 3.2.3 --- Role of oxidatively modified LDL in atherogenesis --- p.38 / Chapter 3.2.4 --- Antioxidants and atherosclerotic heart disease --- p.40 / Chapter 3.2.5 --- Measuring the thiobarbituric acid-reactive substances (TBARS) formation as an index to monitor LDL oxidation --- p.41 / Chapter 3.2.6 --- Effect of flavonoids on Cu2+-mediated human LDL oxidation --- p.41 / Chapter 3.3 --- Objectives --- p.43 / Chapter 3.4 --- Materials and methods --- p.44 / Chapter 3.4.1 --- LDL isolation --- p.44 / Chapter 3.4.2 --- LDL oxidation --- p.44 / Chapter 3.4.3 --- Thiobarbituric acid-reactive substances (TBARS) assay --- p.45 / Chapter 3.4.4 --- Interactions of phenylethanoid glycosides isolated from Kudingcha with Cu2+ in human LDL oxidation --- p.45 / Chapter 3.4.5 --- Statistics --- p.46 / Chapter 3.5 --- Results --- p.47 / Chapter 3.5.1 --- Protective effect of the major phenylethanoid glycosides isolated from Kudingcha on LDL oxidation --- p.47 / Chapter 3.5.2 --- Varying protective effect of individual major Kudingcha phenylethanoid glycosides --- p.47 / Chapter 3.5.3 --- Interactions of Kudingcha phenylethanoid glycosides with Cu2+in human LDL oxidation --- p.51 / Chapter 3.5 --- Discussions --- p.55 / Chapter Chapter 4 --- Inhibitory effects of Kudingcha phenylethanoid glycosides on a-tocopherol oxidation in vitro / Chapter 4.1 --- Introduction --- p.58 / Chapter 4.1.1 --- LDL oxidation and atherosclerosis --- p.58 / Chapter 4.1.2 --- Role of vitamin E in LDL lipid peroxidation --- p.59 / Chapter 4.1.3 --- Interaction of tocopherol interactions with other antioxidants and synergists --- p.61 / Chapter 4.2 --- Objectives --- p.62 / Chapter 4.3 --- Materials and Methods --- p.63 / Chapter 4.3.1 --- Depletion of a-tocopherol in LDL --- p.63 / Chapter 4.3.2 --- Regeneration of a-tocopherol in LDL --- p.63 / Chapter 4.3.3 --- HPLC analysis of a-tocopherol in LDL --- p.64 / Chapter 4.3.4 --- Statistics --- p.64 / Chapter 4.4 --- Results --- p.66 / Chapter 4.4.1 --- Protective effects of Kudingcha phenylethanoid glycosides on a-tocopherol depletion --- p.66 / Chapter 4.4.2 --- Regeneration of a-tocopherol by acteoside --- p.70 / Chapter 4.5 --- Discussions --- p.72 / Chapter Chapter 5 --- Relaxing effects of Kudingcha extract and purified acteoside in rat aortic rings / Chapter 5.1 --- Introduction --- p.75 / Chapter 5.1.1 --- Mechanisms of calcium mobilization --- p.76 / Chapter 5.1.1.1 --- Voltage-dependent calcium channel --- p.76 / Chapter 5.1.1.2 --- Thromboxane A2 Receptor-mediated calcium channel --- p.77 / Chapter 5.1.1.3 --- Protein kinase C in signal transudation --- p.77 / Chapter 5.1.2 --- Contractile proteins and regulation of contraction of vascular smooth muscle --- p.78 / Chapter 5.2 --- Objectives --- p.82 / Chapter 5.3 --- Materials and Methods --- p.83 / Chapter 5.3.1 --- Arterial ring preparation --- p.83 / Chapter 5.3.2 --- Vascular action of Kudingcha extract and acteoside --- p.85 / Chapter 5.3.2.1 --- Relaxant responses of Kudingcha extract and acteoside on U46619 -induced contraction --- p.85 / Chapter 5.3.2.2 --- Relaxant responses of Kudingcha extract and acteoside on high K+ and CaCl2-induced contraction --- p.85 / Chapter 5.3.2.3 --- Relaxant responses of Kudingcha extract and acteoside on protein kinase C- mediated contraction --- p.86 / Chapter 5.3.2.4 --- Effect of acteoside on acetylcholine-induced relaxation --- p.87 / Chapter 5.3.3 --- Statistics --- p.87 / Chapter 5.4 --- Results --- p.88 / Chapter 5.4.1 --- Effects of Kudingcha extract and acteoside on U46619-induced contraction --- p.88 / Chapter 5.4.2 --- Effects of Kudingcha extract and acteoside on high K+-induced contraction --- p.94 / Chapter 5.4.3 --- Effect of Kudingcha extract and acteoside on protein kinase C-mediated contraction --- p.98 / Chapter 5.4.4 --- Effect of acteoside on acetylcholine-induced relaxation --- p.100 / Chapter 5.5 --- Discussions --- p.103 / Chapter Chapter 6 --- Effect of Kudingcha on lipid contents of hamsters and New Zealand Rabbits / Chapter 6.1 --- Introduction --- p.106 / Chapter 6.1.1 --- Factors related to CHD --- p.106 / Chapter 6.1.2 --- Animal model --- p.107 / Chapter 6.2 --- Objectives --- p.108 / Chapter 6.3 --- Materials and Methods --- p.109 / Chapter 6.3.1 --- Rabbit --- p.109 / Chapter 6.3.1.1 --- Measurement of atheroma formation --- p.112 / Chapter 6.3.2 --- Hamster --- p.114 / Chapter 6.3.3 --- Serum lipid determinations --- p.116 / Chapter 6.3.4 --- Determination of hepatic cholesterol content --- p.116 / Chapter 6.3.5 --- Statistics --- p.117 / Chapter 6.4 --- Results --- p.119 / Chapter 6.4.1 --- Growth and Food intake --- p.119 / Chapter 6.4.2 --- "Effect of Kudingcha supplementation on Serum TG, TC and HDL-C" --- p.119 / Chapter 6.4.3 --- Effect of Kudingcha supplementation on hepatic cholesterol contents --- p.124 / Chapter 6.4.4 --- Effect of Kudingcha supplementation on atheroma formation --- p.124 / Chapter 6.5 --- Discussions --- p.129 / Chapter Chapter 7 --- Conclusions --- p.131 / References --- p.134