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Birth weight predicts aging trajectory: A hypothesis.
1Institute of Gerontology NAMS of Ukraine, Vyshgorodskaya st. 67, Kiev 04114, Ukraine.
Mechanisms of Ageing and Development
|April 8, 2018
Summary
Early life growth influences adult disease risk and longevity. Low birth weight (intrauterine growth restriction) is linked to metabolic disorders, while high birth weight (fetal macrosomia) is associated with obesity and cancer, impacting lifespan.
Area of Science:
- Developmental biology
- Epigenetics
- Longevity research
Background:
- Early life conditions, including birth weight, are increasingly recognized as critical determinants of long-term health and aging.
- Intrauterine growth restriction (IUGR) and fetal macrosomia represent extremes of birth weight with distinct health implications later in life.
- Epigenetic modifications and the Growth Hormone/Insulin-like Growth Factor (GH/IGF) axis are proposed mechanisms linking early development to adult disease and aging trajectories.
Purpose of the Study:
- To review evidence linking early-life growth patterns to age-related disease risk and longevity.
- To explore the hypothetical role of the GH/IGF axis in mediating these programmed aging trajectories.
- To discuss the implications of birth weight extremes for lifespan and health outcomes in adulthood.
Main Methods:
- Literature review of human population studies and mechanistic evidence.
- Analysis of associations between birth weight categories (IUGR, macrosomia, normal) and adult health outcomes.
- Hypothetical modeling of aging trajectories based on IGF-1 dynamics.
Main Results:
- Low birth weight (IUGR) is associated with metabolic syndrome, type 2 diabetes, and cardiovascular disease.
- High birth weight (fetal macrosomia) is linked to obesity and increased cancer risk.
- Altered IGF-1 levels, programmed during development, may drive distinct "diabetic" or "cancerous" aging pathways.
Conclusions:
- Both low and high birth weights may predict shorter life expectancy due to programmed "diabetic" or "cancerous" aging.
- Normal birth weight is associated with "normal" aging and potentially maximal longevity.
- Developmental programming via mechanisms like the GH/IGF axis is a key factor in determining life-course health trajectories.
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