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Maternal malnutrition programs the endocrine pancreas in progeny
Brigitte Reusens1, Nicolas Theys, Olivier Dumortier
1Université Catholique de Louvain, Life Sciences Institute, Louvain-la-Neuve, Belgium. brigitte.reusens@uclouvain.be
The American Journal of Clinical Nutrition
|May 13, 2011
Summary
Early life malnutrition, including calorie or protein deficits and high-fat diets, impairs pancreatic beta cell development. This programming leads to reduced insulin secretion and increased oxidative stress, contributing to type 2 diabetes risk.
Area of Science:
- Endocrinology
- Developmental Biology
- Metabolic Disorders
Background:
- Type 2 diabetes results from pancreatic beta cell dysfunction or loss.
- Poor fetal and early postnatal nutrition are linked to later diabetes susceptibility.
- Nutrient availability during development can program the endocrine pancreas.
Purpose of the Study:
- Investigate the effects of various early malnutrition types on rat beta cell populations.
- Identify mechanisms linking intrauterine nutritional insults to beta cell defects.
- Explore potential molecular pathways, like mitochondrial programming, involved in beta cell programming.
Main Methods:
- Utilized rat models to study effects of different dietary deficiencies (calories, protein, high-fat) during development.
- Assessed beta cell mass, insulin secretion, and oxidative stress vulnerability in malnourished pups.
- Reviewed literature on hormonal and molecular factors influencing fetal beta cell development.
Main Results:
- Malnourished rat pups exhibited fewer beta cells with impaired insulin secretion and heightened oxidative stress vulnerability.
- These beta cell defects were persistent and did not fully recover.
- Different nutritional insults led to distinct cellular and physiological mechanisms affecting beta cell mass.
Conclusions:
- Early life malnutrition permanently damages pancreatic beta cell populations, increasing type 2 diabetes risk.
- Hormonal, molecular, and vascular factors may mediate these programming effects.
- Mitochondrial programming is a potential key mechanism in intrauterine beta cell programming.
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