Lifetime consequences of abnormal fetal pancreatic development

Area of Science:

• Endocrinology
• Developmental Biology
• Perinatal Medicine

Background:

• Adverse intrauterine environments, such as maternal diabetes or growth restriction, have lasting health implications.
• Maternal hyperglycemia leads to fetal overgrowth and altered insulin secretion, while growth restriction impairs B-cell development.
• These perinatal changes can predispose individuals to endocrine pancreas dysfunction and insulin resistance later in life.

Purpose of the Study:

• To review the long-term health consequences of adverse intrauterine environments.
• To examine the impact on fetal endocrine pancreas and B-cell development in humans and animal models.
• To explore potential preventative strategies for these long-term effects.

Main Methods:

• Review of existing human and animal model studies on intrauterine environment and endocrine pancreas development.
• Analysis of the effects of maternal conditions like diabetes and undernutrition on fetal growth and B-cell function.
• Comparison of findings from human pregnancies and various animal models of intrauterine growth restriction.

Main Results:

• Maternal diabetes/hyperglycemia causes fetal overgrowth, increased insulin secretion, and B-cell hyperplasia, followed by reduced adult insulin secretion.
• Intrauterine growth restriction is linked to low insulin secretion and delayed B-cell development, potentially leading to later-life insulin resistance.
• Animal models demonstrate that pharmacological, dietary, or surgical interventions can induce intrauterine growth retardation with lasting pancreatic consequences.

Conclusions:

• The endocrine pancreas, particularly insulin-producing B-cells, plays a critical role in adapting to intrauterine stress.
• Long-term health outcomes are significantly influenced by the intrauterine milieu, highlighting a global health concern.
• Further research and concerted efforts are necessary to prevent the adverse long-term effects of unfavorable intrauterine environments.