Yeung Chi Hang, Thomas. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1999. / Includes bibliographical references (leaves 126-146). / Abstracts in English and Chinese. / Table of content / ACKNOWLEDGEMENT --- p.i / ABSTRACT --- p.ii / LIST OF ABBREVIATION --- p.vi / TABLE OF CONTENTS --- p.vii / Chapter Chapter1 --- General Introduction / Chapter 1.1 --- INTRODUCTION --- p.1 / Chapter 1.2 --- FORMATION OF CLA --- p.1 / Chapter 1.3 --- OCCURRENCE OF CLA IN FOODS --- p.5 / Chapter 1.4 --- PHYSIOLOGICAL EFFECTS OF CLA --- p.8 / Chapter 1.4.1 --- Anticarcinogenic Effects of CLA --- p.8 / Chapter 1.4.2 --- Antiatherogenic Effect of CLA --- p.11 / Chapter 1.4.3 --- Antioxidant Effect of CLA --- p.12 / Chapter 1.4.4 --- CLA and Immune Response --- p.13 / Chapter 1.4.5 --- CLA and Body Composition --- p.14 / Chapter Chapter2 --- Protective Effect of CLA on Copper-Induced Human LDL Oxidation / Chapter 2.1 --- INTRODUCTION --- p.17 / Chapter 2.1.1 --- Oxidative Modification of LDL and Atherosclerosis --- p.20 / Chapter 2.1.1.1 --- Understanding of LDL --- p.20 / Chapter 2.1.1.2 --- Oxidative Modification of LDL --- p.20 / Chapter 2.1.1.3 --- Role of Oxidative Modified LDL in Atherogenesis --- p.23 / Chapter 2.1.2 --- Antioxidants and Atherosclerosis --- p.25 / Chapter 2.1.3 --- Measuring TBARS Formation as an in vitro Index to Monitor LDL Oxidation --- p.26 / Chapter 2.1.4 --- CLA and Atherogenesis --- p.27 / Chapter 2.2 --- OBJECTIVE OF THE PRESENT STUDY --- p.28 / Chapter 2.3 --- MATERIALS AND METHODS --- p.29 / Chapter 2.3.1 --- Human LDL Isolation --- p.29 / Chapter 2.3.2 --- LDL Oxidation --- p.30 / Chapter 2.3.3 --- Thiobarbituric Acid Reactive Substances (TBARS) Assay --- p.30 / Chapter 2.4 --- STATISTICS --- p.31 / Chapter 2.5 --- RESULTS --- p.32 / Chapter 2.5.1 --- Inhibitory Effect of BSA on Human LDL Oxidation --- p.32 / Chapter 2.5.2 --- Pro-oxidant Effect of LA on Human LDL Oxidation --- p.32 / Chapter 2.5.3 --- Inhibitory Effect of CLA on Human LDL Oxidation --- p.32 / Chapter 2.6 --- DISCUSSION --- p.37 / Chapter 2.6.1 --- Effect ofBSA on Copper-Induced LDL Oxidation --- p.37 / Chapter 2.6.2 --- Effect of LA on Copper-Induced LDL Oxidation --- p.38 / Chapter 2.6.3 --- Protective Effect of CLA on Copper-Induced Human LDL Oxidation --- p.39 / Chapter Chapter3 --- Hypolipidemic Activity of CLA / Chapter 3.1 --- INTRODUCTION --- p.42 / Chapter 3.1.1 --- Total Cholesterol and LDL Cholesterol --- p.42 / Chapter 3.1.2 --- Triglyceride (TG) --- p.44 / Chapter 3.1.3 --- Hypolipidemic Effect of CLA --- p.45 / Chapter 3.1.4 --- Golden Syrian Hamster as an Animal Model of Cholesterol Metabolism --- p.46 / Chapter 3.2 --- OBJECTIVES OF THE PRESENT STUDY --- p.48 / Chapter 3.3 --- MATERIALS AND METHODS --- p.48 / Chapter 3.3.1 --- LA and CLA --- p.49 / Chapter 3.3.2 --- Animals --- p.49 / Chapter 3.3.3 --- Experiment1 --- p.49 / Chapter 3.3.4 --- Experiment2 --- p.51 / Chapter 3.3.5 --- "Determination of Serum TC, HDL-Cholesterol (HDL-C) and TG" --- p.54 / Chapter 3.3.6 --- Lipid analysis of Liver and Adipose Tissue --- p.54 / Chapter 3.3.6.1 --- Lipid Extraction and Separation of Different Lipid Species --- p.54 / Chapter 3.3.6.2 --- Acid-Catalyzed Methylation of Fatty Acids --- p.55 / Chapter 3.3.6.3 --- GLC Analysis of FAME --- p.55 / Chapter 3.3.7 --- Quantification of Tissue Cholesterol --- p.56 / Chapter 3.3.7.1 --- Cholesterol Extraction and Silylation --- p.56 / Chapter 3.3.7.2 --- GLC Analysis of TMS-Ether Derivative of Cholesterol --- p.56 / Chapter 3.4 --- STATISTICS --- p.57 / Chapter 3.5 --- RESULTS --- p.59 / Chapter 3.5.1 --- Body Weight and Food Intake --- p.59 / Chapter 3.5.2 --- "Effect of Dietary CLA Supplementation on Serum TG, TC and HDL-C" --- p.59 / Chapter 3.5.3 --- "Effect of Dietary CLA Supplementation on Hepatic TG, Phospholipid and Cholesterol" --- p.64 / Chapter 3.5.4 --- Effect of Dietary CLA Supplementation on Adipose Tissue TG and Cholesterol --- p.73 / Chapter 3.5.5 --- Effect of CLA Supplementation on Cholesterol Levels of Different Tissues --- p.73 / Chapter 3.6 --- DISCUSSION --- p.79 / Chapter 3.6.1 --- "Effect of CLA Supplementation on Serum TG, TC and HDL-C" --- p.79 / Chapter 3.6.2 --- "Effect of CLA Supplementation on Hepatic TG, PL and Cholesterol" --- p.81 / Chapter 3.6.3 --- Effect of CLA on Adipose Tissue TG and Cholesterol --- p.83 / Chapter 3.6.4 --- Implication of CLA Intake in Humans --- p.84 / Chapter Chapter4 --- Influences of Dietary CLA on Cholesterol Homeostasis / Chapter 4.1 --- INTRODUCTION --- p.86 / Chapter 4.2 --- NEUTRAL EFFECT OF DIETARY CLA SUPPLEMENTATION ON HMG-COA REDUCTASE ACTIVITY --- p.88 / Chapter 4.2.1 --- HMG-CoA Reductase as the Rate-Limiting Enzyme in Cholesterol Synthesis --- p.88 / Chapter 4.2.2 --- Objective of The Present Study --- p.91 / Chapter 4.2.3 --- Materials and Methods --- p.92 / Chapter 4.2.3.1 --- Preparation of Hepatic Microsome --- p.92 / Chapter 4.2.3.2 --- HMG-GoA Reductase Activity Assay --- p.92 / Chapter 4.2.4 --- Statistics --- p.93 / Chapter 4.2.5 --- Results --- p.94 / Chapter 4.2.6 --- Discussion --- p.96 / Chapter 4.3 --- DOWN-REGULATION OF THE INTESTINAL ACAT ACTIVITY BY CLA FEEDING --- p.97 / Chapter 4.3.1 --- Role of ACAT in Cholesterol Absorption --- p.97 / Chapter 4.3.2 --- Objective of The Present Study --- p.99 / Chapter 4.3.3 --- Materials and Methods --- p.100 / Chapter 4.3.3.1 --- Preparation of Intestinal Microsome --- p.100 / Chapter 4.3.3.2 --- ACAT Activity Assay --- p.100 / Chapter 4.3.4 --- Statistics --- p.101 / Chapter 4.3.5 --- Results --- p.102 / Chapter 4.3.6 --- Discussion --- p.104 / Chapter 4.4 --- ALTERATION OF FECAL EXCRETION BY DIETARY CLA --- p.105 / Chapter 4.4.1 --- Objective of The Present Study --- p.108 / Chapter 4.4.2 --- Materials and Methods --- p.109 / Chapter 4.4.2.1 --- Separation of Neutral and Acidic Sterols --- p.109 / Chapter 4.4.2.2 --- Neutral Sterol Analysis --- p.109 / Chapter 4.4.2.3 --- Acidic Sterol Analysis --- p.110 / Chapter 4.4.2.4 --- GLC Analysis of Neutral and Acidic Sterols --- p.110 / Chapter 4.4.3 --- Statistics --- p.113 / Chapter 4.4.4 --- Results --- p.114 / Chapter 4.4.4.1 --- Effect of CLA Supplementation on Fecal Output of Neutral Sterols --- p.114 / Chapter 4.4.4.2 --- Effect of CLA Supplementation on Fecal Output of Acidic Sterols --- p.114 / Chapter 4.4.5 --- Discussion --- p.118 / Chapter Chapter5 --- Conclusions --- p.123 / References --- p.126