Related Experiment Videos
Programming the cardiovascular system, kidney and the brain--a review
E M Wintour1, K Johnson, I Koukoulas
1Howard Florey Institute, University of Melbourne, Parkville, Victoria, 3010, Australia. mwc@hfi.unimelb.edu.au
Placenta
|July 5, 2003
Summary
Early life stress, including maternal diet and hormone exposure, can reduce nephron number, increasing the risk of adult hypertension. This highlights the critical importance of the first environment for long-term cardiovascular health.
Area of Science:
- Developmental Biology
- Nephrology
- Cardiovascular Science
Background:
- The 'first environment' concept suggests prenatal conditions influence adult cardiovascular/metabolic disease risk.
- Epidemiological data is increasingly supported by animal studies on early life influences.
Purpose of the Study:
- To investigate how disruptions in nephrogenesis (kidney development) impact future kidney function and hypertension risk.
- To identify specific early-life factors that reduce nephron number and predispose to adult hypertension.
Main Methods:
- Review of animal experimental data and human epidemiological studies.
- Analysis of factors affecting nephrogenesis, including maternal diet, glucocorticoids, vitamin A deficiency, hyperglycemia, unilateral nephrectomy, and genetic factors (GDNF).
Main Results:
- Factors disrupting nephrogenesis reduce adult nephron number by 20-40%, leading to hypertension.
- Observed alterations in the hypothalamic-pituitary-adrenal axis (rats) and brain angiotensin systems (sheep) in hypertensive models.
- Kidney and brain vulnerability is highest during very early developmental stages.
Conclusions:
- Reduced nephron endowment during critical developmental periods is a key mechanism for adult hypertension.
- Early-life interventions targeting nephrogenesis may prevent adult cardiovascular diseases.
- Both kidney and brain development are uniquely vulnerable in early embryonic stages.