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[Obesity and the relationship between somatotrophic axis and bone tissue]
Zofia Ostrowska1, Andrzej Kobielski, Beata Kos-Kudła
1Zakład Biochemii Klinicznej, Slaski Uniwersytet Medyczny, Zabrze. ozdrasiek@wp.pl
Endokrynologia Polska
|September 16, 2009
Summary
Obese postmenopausal women show increased bone mineral density, potentially due to adipose tissue acting as an endocrine organ influencing bone remodeling. Growth Hormone (GH) and Insulin-like Growth Factor-I (IGF-I) changes in obesity may affect bone health.
Area of Science:
- Endocrinology
- Bone Biology
- Metabolic Health
Context:
- Postmenopausal obesity is linked to higher bone mineral density (BMD) compared to lean women.
- Adipose tissue's role as an endocrine organ is increasingly recognized for its influence on skeletal health.
- The somatotropic axis, including Growth Hormone (GH) and Insulin-like Growth Factor-I (IGF-I), interacts with bone tissue.
Purpose:
- To explore the relationship between obesity, the somatotropic axis, and bone remodeling in postmenopausal women.
- To investigate how age-related changes in GH and IGF-I secretion are modified by obesity and body composition.
Summary:
- Obesity in postmenopausal women is associated with increased BMD, challenging traditional views.
- Decreased GH and IGF-I secretion with age is more pronounced in obese individuals, correlating with BMI and body fat percentage.
- GH and IGF-I influence bone remodeling by modulating osteoblast and osteoclast activity via OPG and RANKL.
Impact:
- Highlights the complex endocrine role of adipose tissue in postmenopausal bone health.
- Suggests that altered GH/IGF-I signaling in obese postmenopausal women contributes to modified bone remodeling.
- Provides insights into the molecular mechanisms (OPG/RANKL) underlying bone changes in this demographic.
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