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Published on: May 8, 2018
Models and mechanisms of energy balance regulation in the young
1Division of Obesity and Metabolic Health, Rowett Research Institute, Aberdeen AB21 9SB, UK. J.Mercer@rowett.ac.uk
Insights
Childhood obesity is rising globally, especially in the UK. Studying rodent models reveals genetic and early-life factors influencing energy balance and obesity, aiding intervention strategies.
Area of Science:
- Pediatric Endocrinology
- Obesity Research
- Nutritional Science
Background:
- Childhood obesity is a growing global health concern, with the UK facing particular challenges.
- Understanding the complex regulatory systems of energy balance is crucial for developing effective interventions.
- Laboratory animal models are essential for studying the mechanisms of obesity, especially in young populations.
Purpose of the Study:
- To investigate the underlying causes and developmental pathways of childhood obesity.
- To identify key genes and environmental factors contributing to energy imbalance.
- To explore the long-term metabolic consequences of early-life nutritional programming.
Main Methods:
- Utilizing experimental rodent models with specific gene mutations causing obesity.
- Examining genetic susceptibility to obesity in obesogenic environments.
- Analyzing the impact of early-life nutritional experiences on later-life metabolic health.
Main Results:
- Identified genes critical for body weight regulation in rodents and humans.
- Demonstrated the significant impact of diet and obesogenic environments on regulatory systems in the young.
- Highlighted the sensitivity of developing systems to in utero and early-life nutrition.
Conclusions:
- Rodent models provide critical insights into the genetic and environmental drivers of early-onset obesity.
- Early-life nutrition plays a pivotal role in programming susceptibility to obesity and metabolic disorders.
- Findings support the development of targeted interventions for childhood obesity based on genetic and nutritional factors.
Abstract:
The proportion of the child and adolescent population that is in appropriate energy balance is declining throughout the developed world, and childhood obesity is a particular problem in the UK relative to other northern European countries. Assessment of the underlying causes of obesity, and the different routes to its development, may assist in the definition of successful intervention strategies. The network of peripheral and central (brain) regulatory systems that underlie energy balance and body weight and composition can, for the most part, only be approached experimentally through the study of appropriate laboratory animal models. This problem is particularly acute when the target is overweight and obesity in the young. Some of the mechanisms underlying the development of energy imbalance and specifically the onset of overweight and obesity in the young, and the metabolic health consequences of obesity, can be addressed by examination of experimental rodent models in which mutation of a single gene causes early-onset extreme obesity, genetic susceptibility to obesity is revealed in an obesogenic environment or early-life nutritional experience programmes susceptibility to obesity or metabolic problems in later life. These studies highlight genes that are essential to normal body-weight regulation in rodents and man, the impact of diet and diet-induced obesity on regulatory systems in the young and the potential sensitivity of developing regulatory systems to nutritional experiences in utero and during early life.
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