Route-Dependent Endocrine and Metabolic Effects of Estrogen Replacement Therapy
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Anthony J. O’Sullivan
ABSTRACT
The route of estrogen replacement therapy has a major impact on the growth hormone (GH)-insulin-like growth factor-I (IGF-I) axis. Estrogen administration by the oral, but not the transdermal, route reduces IGF-I and increases GH levels in postmenopausal women. This perturbation of the GH-IGF-I axis occurs with different forms of estrogen treatment, indicating that the dissociation of the somatotropic axis and concomitant increase in GH-binding protein levels are intrinsic effects of the oral route of estrogen administration. In clinical studies, oral estrogen reduced postprandial lipid oxidation, compared with transdermal estrogen. Oral estrogen was also associated with a reduction in lean body mass and an increase in fat mass, compared with transdermal estrogen. In contrast, the route of estrogen therapy had no impact on carbohydrate metabolism or the estrogen-induced increase in bone mineral density. The findings of route-dependent changes in body composition add a new dimension to health considerations concerning estrogen therapy in postmenopausal women and may have significant implications for estrogen replacement therapy in young hypogonadal females.
© 2014 by Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
- Titelei
- TABLE OF CONTENTS
- Foreword
- What Happens When Growth Hormone is Discontinued at Completion of Growth? Metabolic Aspects
- Growth Hormone Deficiency and Peak Bone Mass
- Optimal Strategy for Management of Pituitary Disease in the Growth Hormone-Deficient Teenager
- Ethical Dilemmas in Pediatric Endocrinology: Growth Hormone for Short Normal Children
- Evidence-Based Approach to Growth Hormone Replacement Therapy in Adults, with Special Emphasis on Body Composition
- Evidence-Based Growth Hormone Therapy Prediction Models
- New Paradigms for Growth Hormone Treatment in the 21st Century: Prediction Models
- Role of Insulin-like Growth Factor Monitoring in Optimizing Growth Hormone Therapy
- Knockout Mice Challenge Our Concepts of Glucose Homeostasis and the Pathogenesis of Diabetes Mellitus
- Type 2 Diabetes Mellitus in Children: Pathophysiology and Risk Factors
- Emergence of Type 2 Diabetes Mellitus in Children: Epidemiological Evidence
- Treatment of Type 2 Diabetes Mellitus in Children and Adolescents
- Diagnosis of Maturity-Onset Diabetes of the Young in the Pediatric Diabetes Clinic
- Thrifty Genotypes and Phenotypes in the Pathogenesis of Type 2 Diabetes Mellitus
- Estradiol: A Protective Factor in the Adult Brain
- Estrogen Treatment and Estrogen Suppression: Metabolic Effects in Adolescence
- Estrogen, Bone, Growth and Sex: A Sea Change in Conventional Wisdom
- Route-Dependent Endocrine and Metabolic Effects of Estrogen Replacement Therapy
- Telomerase and the Cellular Lifespan: Implications for the Aging Process
- Human Aging and Progeria
- A Role for the Somatotropic Axis in Neural Development, Injury and Disease
- Hypothalamic Growth Hormone-Insulin-like Growth Factor-I Axis across the Human Life Span
- The Lost Voice: A History of the Castrato
- SELECTED POSTER ABSTRACTS
- GROWTH. FETAL GROWTH. SGA
- SYNDROMES: TURNER. PRADER-WILLI. NOONAN. PHP. OTHERS
- GHD. HYPOPITUITARISM. KIGS
- METABOLIC. GENETIC. ADULT. ACROMEGALY
- GH. IGF. IGFBPs
- GROWTH IN SYSTEMIC DISEASE. CRI. RICKETS. STEROIDS
Artikel in diesem Heft
- Titelei
- TABLE OF CONTENTS
- Foreword
- What Happens When Growth Hormone is Discontinued at Completion of Growth? Metabolic Aspects
- Growth Hormone Deficiency and Peak Bone Mass
- Optimal Strategy for Management of Pituitary Disease in the Growth Hormone-Deficient Teenager
- Ethical Dilemmas in Pediatric Endocrinology: Growth Hormone for Short Normal Children
- Evidence-Based Approach to Growth Hormone Replacement Therapy in Adults, with Special Emphasis on Body Composition
- Evidence-Based Growth Hormone Therapy Prediction Models
- New Paradigms for Growth Hormone Treatment in the 21st Century: Prediction Models
- Role of Insulin-like Growth Factor Monitoring in Optimizing Growth Hormone Therapy
- Knockout Mice Challenge Our Concepts of Glucose Homeostasis and the Pathogenesis of Diabetes Mellitus
- Type 2 Diabetes Mellitus in Children: Pathophysiology and Risk Factors
- Emergence of Type 2 Diabetes Mellitus in Children: Epidemiological Evidence
- Treatment of Type 2 Diabetes Mellitus in Children and Adolescents
- Diagnosis of Maturity-Onset Diabetes of the Young in the Pediatric Diabetes Clinic
- Thrifty Genotypes and Phenotypes in the Pathogenesis of Type 2 Diabetes Mellitus
- Estradiol: A Protective Factor in the Adult Brain
- Estrogen Treatment and Estrogen Suppression: Metabolic Effects in Adolescence
- Estrogen, Bone, Growth and Sex: A Sea Change in Conventional Wisdom
- Route-Dependent Endocrine and Metabolic Effects of Estrogen Replacement Therapy
- Telomerase and the Cellular Lifespan: Implications for the Aging Process
- Human Aging and Progeria
- A Role for the Somatotropic Axis in Neural Development, Injury and Disease
- Hypothalamic Growth Hormone-Insulin-like Growth Factor-I Axis across the Human Life Span
- The Lost Voice: A History of the Castrato
- SELECTED POSTER ABSTRACTS
- GROWTH. FETAL GROWTH. SGA
- SYNDROMES: TURNER. PRADER-WILLI. NOONAN. PHP. OTHERS
- GHD. HYPOPITUITARISM. KIGS
- METABOLIC. GENETIC. ADULT. ACROMEGALY
- GH. IGF. IGFBPs
- GROWTH IN SYSTEMIC DISEASE. CRI. RICKETS. STEROIDS
