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Published on: June 3, 2016
Early life origins of metabolic disease: Developmental programming of hypothalamic pathways controlling energy
Laura Dearden1, Susan E Ozanne1
1University of Cambridge Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Box 289, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom.
Insights
Maternal metabolic conditions like obesity or diabetes during pregnancy can program offspring to become obese. This occurs by altering the development of the hypothalamus, a key brain region for regulating energy balance.
Area of Science:
- Developmental biology
- Neuroscience
- Metabolic disorders
Background:
- Perinatal exposure to adverse metabolic conditions (maternal obesity, diabetes, under-nutrition) predisposes offspring to obesity.
- This programming is a significant factor in the global rise of obesity rates.
- Offspring obesity is linked to hyperphagia, suggesting altered central energy homeostasis regulation.
Purpose of the Study:
- To review current knowledge on how adverse perinatal environments impact hypothalamic development.
- To explore the mechanisms mediating these programming effects.
- To understand the link between perinatal exposures and later-life metabolic phenotypes.
Main Methods:
- Review of animal (rodent) and non-human primate studies.
- Analysis of research on hypothalamic plasticity during the perinatal period.
- Examination of metabolic signals affecting fetal development.
Main Results:
- Adverse maternal environments impair hypothalamic structure and function during critical developmental windows.
- These impairments are potentially linked to the development of obesity and metabolic dysfunction in offspring.
- The hypothalamus is sensitive to metabolic signals during perinatal development.
Conclusions:
- Perinatal programming via hypothalamic development is a key mechanism linking maternal metabolic state to offspring obesity.
- Understanding these mechanisms is crucial for developing interventions to prevent childhood and adult obesity.
- Further research is needed to fully elucidate the mediating pathways.
Abstract:
A wealth of animal and human studies demonstrate that perinatal exposure to adverse metabolic conditions - be it maternal obesity, diabetes or under-nutrition - results in predisposition of offspring to develop obesity later in life. This mechanism is a contributing factor to the exponential rise in obesity rates. Increased weight gain in offspring exposed to maternal obesity is usually associated with hyperphagia, implicating altered central regulation of energy homeostasis as an underlying cause. Perinatal development of the hypothalamus (a brain region key to metabolic regulation) is plastic and sensitive to metabolic signals during this critical time window. Recent research in non-human primate and rodent models has demonstrated that exposure to adverse maternal environments impairs the development of hypothalamic structure and consequently function, potentially underpinning metabolic phenotypes in later life. This review summarizes our current knowledge of how adverse perinatal environments program hypothalamic development and explores the mechanisms that could mediate these effects.
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