Thesis (Ph.D.) -- University of Adelaide, Dept. of Physiology, 1999. / Includes bibliographical references (leaves 172-217).

by Linda Shiou-mei Ooi. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1993. / Includes bibliographical references (leaves 95-109). / Abstract --- p.i / Acknowledgements --- p.iii / List of Figures --- p.viii / Chapter Chapter I. --- Introduction --- p.1 / Objectives --- p.4 / Chapter Chapter II. --- Literature Review --- p.5 / Chapter II. 1. --- Lipoprotein-Lipids --- p.5 / Chapter II.1.1. --- General Concept and Metabolism of Lipoprotein-lipids --- p.5 / Chapter II. 1.2. --- Factors affecting plasma lipoprotein-lipids --- p.11 / Chapter II. 1.2.1. --- Ageing --- p.11 / Chapter II. 1.2.2. --- Obesity --- p.12 / Chapter II. 1.2.3. --- Diet --- p.13 / Chapter II. 1.2.4. --- Alcohol --- p.13 / Chapter II. 1.2.5. --- Cigarette smoking --- p.14 / Chapter II. 1.2.6. --- Exercise --- p.14 / Chapter II. 1.2.7. --- Gender differences --- p.14 / Chapter II.2. --- Sex Hormones --- p.14 / Chapter II.2.1. --- General concepts of sex hormone-production and the metabolism of sex hormones --- p.15 / Chapter II.2.1.1. --- Biosynthesis of testosterone --- p.16 / Chapter II.2.1.2. --- Metabolism of testosterone --- p.17 / Chapter II.2.1.3. --- Dihydrotestosterone (DHT) --- p.18 / Chapter II.2.1.4. --- Androstenedione --- p.18 / Chapter II.2.1.5. --- Biosynthesis of estrogen in men --- p.18 / Chapter II.2.1.6. --- Metabolism of estrogen --- p.19 / Chapter II.2.2. --- Factors affecting sex hormone levels in plasma --- p.19 / Chapter II.2.2.1. --- Sex hormone binding globulin (SHBG) --- p.19 / Chapter II.2.2.2. --- Sampling time --- p.19 / Chapter II.2.2.3. --- Stress and acute or chronic non-endocrine illnesses --- p.20 / Chapter II.2.2.4. --- Ageing --- p.21 / Chapter II.2.2.5. --- Diet and nutrition --- p.21 / Chapter II.2.2.6. --- "Medication, drugs and alcohol" --- p.22 / Chapter II.2.2.7. --- Body composition and obesity --- p.22 / Chapter II.2.2.8. --- Variations in states of sleep-wake cycle --- p.23 / Chapter II.2.2.9. --- Levels of physical and sympathetic nervous system activity --- p.23 / Chapter II. 3. --- The relationship between sex hormones and lipoproteins --- p.24 / Chapter II.3.1. --- "Gender difference in sex hormones, menopause and lipoprotein-lipids" --- p.24 / Chapter II.3.2. --- "Interventional study, exogenous sex hormone and lipoprotein-lipidsin men" --- p.25 / Chapter II.3.3. --- The relationships of endogenous sex hormones and lipoprotein-lipids --- p.26 / Chapter Chapter III. --- Materials and Methods --- p.28 / Chapter III.l. --- Subjects and Sampling Methods --- p.28 / Chapter III.2. --- Quantitation of serum lipoprotein-lipids --- p.29 / Chapter III.2.1 --- Determination of cholesterol and triglyceride --- p.29 / Chapter Table III.2.1.A. --- Intra-assay variations for cholesterol and triglyceride --- p.30 / Chapter Table III.2.1.B. --- Inter -assay variations for Cholesterol and Triglyceride --- p.30 / Chapter III.2.2. --- Determination of HDL-Cholesterol and its subfractions --- p.31 / Chapter Table III.2.2. --- Intra- and inter-assay variation for HDL-cholesterol --- p.31 / Chapter III.2.3. --- Determination of VLDL-C and LDL-C --- p.32 / Chapter III.2.4. --- Quantitative determination of serum apolipoproteins and Lp(a) --- p.32 / Chapter III.2.4.1. --- Determination of Apolipoproteins A-I and B --- p.33 / Chapter III.2.4.2. --- Determination of Lipoprotein (a) --- p.33 / Chapter III. 3. --- Quantitative determination of sex hormones --- p.33 / Chapter III.3.1. --- For urinary unconjugated and serum total testosterone --- p.34 / Chapter III.3.1.1 --- Experimental Procedures --- p.35 / Determination of the optimal antibody titre --- p.35 / Establishment of a standard curve and quality controls --- p.35 / Preparation of standards --- p.35 / Purification of radioactively-labelled 3H-testosterone --- p.37 / Preparation of charcoal- stripped urine as zero calibrator (blank) --- p.37 / Preparation of spiked urine or plasma --- p.38 / Preparation of samples for RIA --- p.38 / RIA --- p.39 / Calculation --- p.40 / Chapter III.3.1.2. --- Characteristics of the radioimmunoassay for testosterone --- p.40 / Sensitivity --- p.40 / Precision studies --- p.42 / Within- and between- batch imprecisions --- p.42 / Chapter Table III.3.1.2.A. --- Within-run variation --- p.42 / Chapter Table III.3.1.2.B. --- Between-run variation --- p.42 / Recoveries --- p.43 / Chapter Table III.3.1.2.C. --- "The recoveries of known amounts of testosterone added to charcoal-stripped urine, between immunoassays" --- p.43 / Test of linearity --- p.43 / Comparison with another procedure --- p.43 / Cross reactivity of the antiserum --- p.44 / Procedure --- p.46 / Chapter Table III.3.1.2.D. --- Cross reactivity of some naturally occurring steroids with testosterone antiserum --- p.47 / Chapter III.3.2 --- For urinary total testosterone --- p.47 / Test of linearity and recovery --- p.48 / Chapter III.3.3. --- For urinary unconjugated and serum total 17β-Estradiol --- p.50 / Chapter III.3.3.1 --- Experimental procedure --- p.50 / Determination of the optimal antibody titre --- p.50 / Establishment of a standard curve and quality controls --- p.52 / Preparation of standards --- p.52 / Preparation of tracer 3H-estradiol and construction of a standard curve --- p.52 / Preparation of spiked control urine or plasma --- p.52 / Preparation of samples for RIA --- p.53 / Chapter III.3.3.2. --- Characteristics of the radioimmunoassay for E2 --- p.53 / Sensitivity --- p.54 / Precision studies --- p.54 / Within- and between- batch imprecisions --- p.54 / Chapter Table III.3.3.2.A. --- Within-run variation of known amount of E2 added to charcoal- stripped urine --- p.54 / Chapter Table III.3.3.2.B. --- Between-run variation of known amount of e2 added to charcoal- stripped urine --- p.54 / Recoveries --- p.56 / Chapter Table III.3.3.2.C. --- "The recoveries of known amount of e2 added to charcoal- stripped urine, between immunoassays" --- p.56 / Test of linearity --- p.56 / Comparison with another procedure --- p.56 / Chapter III.3.4. --- For urinary total estradiol --- p.58 / Test of linearity and recovery --- p.58 / Chapter III.4. --- Determination of serum sex hormone-binding globulin (SHBG) --- p.60 / Chapter III.5. --- Determination of urinary unconjugated Cortisol --- p.60 / Chapter III.6. --- Statistical methods --- p.62 / Chapter III.6.1. --- Biological Variations --- p.62 / Chapter III.6.2. --- Univariate and multivariate correlations --- p.62 / Chapter Chapter IV. --- Results --- p.64 / Chapter IV. 1. --- The characteristics of the experimental subjects and their lipoprotein-lipids profiles --- p.64 / Chapter Table IV. 1. A. --- The anthropometric and biochemical characteristics of the experimental male subjects --- p.64 / Chapter Table IV.1.B. --- The lipoprotein-lipids profiles in 46 healthy Hong Kong Chinese men --- p.65 / Chapter IV. 2. --- "Levels of sex hormones in serum and urine, and urinary free Cortisol" --- p.65 / Chapter Table IV.2. --- The sex hormones at serum and urinary levels and urinary free Cortisol in 46 healthy Hong Kong Chinese men --- p.66 / Chapter Table IV.2.A. --- Formula for the indirect calculation of unbound (free) testosterone levels in plasma --- p.67 / Chapter Table IV.2.B. --- Formula for the indirect calculation of unbound (free) 17β-estradiol levels in plasma --- p.68 / Chapter IV. 3. --- Biological variations --- p.69 / Chapter Table IV. 3. --- "The biological variations of serum lipoprotein-lipids, serum sex hormones and urinary sex hormones and Cortisol in 46 healthy Hong Kong Chinese men" --- p.69 / Chapter Table IV.3.A. --- Correlations of serum lipoprotein-lipids between short-term (3- week) variations --- p.70 / Chapter Table IV.3.B. --- Correlations of serum and urinary sex hormones and urinary unconjugated Cortisol between short-term (3-week) variations --- p.70 / Chapter IV. 4. --- Univariate correlation --- p.71 / Chapter Table IV.4. --- The univariate correlation table --- p.72 / Chapter IV.4.1. --- Inter-relationship among serum and urinary sex hormones --- p.73 / Chapter IV.4.2. --- Urinary free Cortisol and sex hormones and serum lipoprotein-lipids --- p.73 / Chapter IV.4.3. --- Correlation between urinary sex hormones and serum lipoprotein- lipids --- p.73 / Chapter IV.4.4. --- Correlations among serum lipoprotein-lipids --- p.74 / Chapter IV.4.5. --- Correlations between serum lipoprotein-lipids and sex hormones --- p.74 / Chapter IV.4.6. --- "Correlations between anthropometric variables, sex hormones and lipoprotein-lipids" --- p.75 / Chapter IV.4.7. --- Correlation of the ratio of HDL2 and HDL3 and other variables --- p.76 / Chapter IV. 5. --- Multiple linear stepwise regression --- p.77 / Chapter Table IV.5. --- "Stepwise multiple linear regression of lipoprotein-lipids on BMI, W/H Ratio, and Age" --- p.77 / Chapter Table IV.5. A. --- "Stepwise multiple linear regression of lipoprotein-lipids on BMI, W/H Ratio, Age, SHBG, and serum and urinary Sex Hormones" --- p.80 / Chapter Table IV.5.B. --- "Stepwise multiple linear regression of lipoprotein-lipids on BMI, W/H Ratio, Age, SHBG, Triglyceride and serum and urinary Sex Hormones" --- p.81 / Chapter Chapter V. --- Discussion --- p.82 / Chapter V. l. --- Experimental subjects and their lipoprotein-lipids profiles --- p.82 / Chapter V. 2. --- Levels of sex hormones in serum and urine --- p.84 / Chapter Table V.2. --- Values of sex steroids in 46 healthy Hong Kong Chinese men compared to others cited in literature --- p.85 / Chapter V. 3. --- "17β-Estradiol,atherogenic lipoprotein-lpids and HDL3" --- p.88 / Chapter V. 4. --- "Testosterone, and HDL-C and its subfractions" --- p.90 / Chapter Chapter VI. --- Conclusions --- p.92 / References --- p.95 / Appendices --- p.110