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Outcome of low birthweight
1Medical Research Council Environmental Epidemiology Unit, University of Southampton, UK.
Insights
Babies born small face higher risks of adult diseases like heart disease and diabetes. Early life nutrition and oxygen supply may permanently alter development, leading to these long-term health issues.
Area of Science:
- Developmental biology
- Metabolic disease
- Cardiovascular health
Background:
- Infant growth restriction is linked to increased adult risk of coronary heart disease, hypertension, and diabetes.
- This association suggests 'developmental programming' where early-life conditions permanently affect health.
- The underlying cellular and molecular mechanisms of this programming are not fully understood.
Purpose of the Study:
- To explore the concept of developmental programming in relation to early life growth and adult disease.
- To highlight the potential role of nutrient or oxygen inadequacy in utero or infancy.
- To identify potential cellular and molecular factors involved in programming.
Main Methods:
- Review of existing literature on early life nutrition, growth, and adult disease.
- Examination of animal studies documenting 'programming' effects of undernutrition.
- Hypothesizing cellular and molecular changes, such as altered hormone secretion or tissue sensitivity.
Main Results:
- Confirmed association between small size at birth/infancy and increased risk of adult chronic diseases.
- Established 'programming' as a key concept linking early undernutrition to permanent structural and functional changes.
- Identified hormonal and tissue sensitivity changes as potential key factors in adult disease development.
Conclusions:
- Early life nutritional and oxygen supply significantly influences long-term health outcomes.
- Developmental programming provides a framework for understanding the link between infant growth and adult disease.
- Further research into cellular and molecular mechanisms is crucial for understanding and potentially preventing adult-onset diseases.
Abstract:
Babies who are small at birth and during infancy are now known to be at an increased risk of developing coronary heart disease, hypertension and diabetes during adult life. This has led to the suggestion that these diseases are 'programmed' by an inadequate supply of nutrients or oxygen in utero or immediately after birth. The phenomenon of 'programming', whereby undernutrition in early life permanently changes body structure and function, is well documented in animals. As yet we know little about cellular and molecular changes which underlie it, but persisting changes in the secretion of hormones or in the sensitivity of tissues to them may be important in determining adult disease.