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The Developmental Origins of Asthma and COPD
Francesca Polverino1, Don D Sin2
1Pulmonary and Critical Care Medicine, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA;
Insights
Early life lung insults impair development, increasing risks for childhood asthma and adult chronic obstructive pulmonary disease (COPD). Early intervention for at-risk children is crucial for preventing lifelong respiratory disease.
Area of Science:
- Pulmonary Medicine
- Developmental Pediatrics
- Environmental Health
Background:
- Two-thirds of chronic obstructive pulmonary disease (COPD) and adult asthma cases stem from impaired early-life lung development.
- Childhood lung insults lead to abnormal development and persistent impaired lung function.
- Risk factors include genetic/epigenetic changes, oxidative stress, inflammation, and environmental exposures.
Purpose of the Study:
- To review the interplay of genetic, environmental, and socioeconomic factors on lung development.
- To understand the cumulative impact on asthma and COPD risk and burden.
- To highlight the importance of early diagnosis and preventive measures.
Main Methods:
- Literature review synthesizing current research on lung development and respiratory diseases.
- Analysis of factors contributing to abnormal lung trajectories in children.
- Examination of the transition from childhood asthma to adult COPD.
Main Results:
- Early-life lung insults significantly increase the risk for developing asthma and COPD later in life.
- Environmental factors (smoke, pollution, nutrition, infections) and genetic predispositions interact to affect lung development.
- Poorly controlled asthma and other risk factors can lead to COPD in adulthood.
Conclusions:
- Abnormal lung development in early life is a critical determinant of adult respiratory disease.
- Modifiable factors underscore the need for timely identification and intervention in at-risk children.
- Addressing genetic, environmental, and socioeconomic factors is key to reducing the global burden of asthma and COPD.
Abstract:
Approximately two-thirds of cases of chronic obstructive pulmonary disease (COPD) and adult asthma are in part driven by impaired lung development related to early-life events. Many children who suffer insults to their lungs during the first few years of life experience abnormal lung development, growth, and/or maturation, leading to impaired lung function, which may persist throughout their lifespan. This abnormal lung trajectory may be exacerbated by lung dysanapsis, genetic and epigenetic alterations, oxidative stress and/or inflammation in the airways related to environmental factors including exposure to active or secondhand smoke, air pollution, poor nutrition and social deprivation, and repeated childhood respiratory tract infections. Children with asthma may transition to COPD in adulthood if their asthma is poorly controlled or in the presence of other risk factors such as smoking. As many of these factors are modifiable, prompt diagnosis and implementation of preventive measures should be considered as early as possible in children at risk for abnormal lung development. This review provides an update on the interplay between genetic, environmental, and socioeconomic factors, their cumulative impact on lung development, and its implication for the risk and burden of asthma and COPD in the global population.
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