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[Smoking, fetal pulmonary development and lung disease in children]
1Service de Pneumologie Pédiatrique et Unité INSERM E 213, Hôpital Armand-Trousseau, AP-HP, 26, avenue du Docteur-Arnold-Netter, 75571 Paris Cedex 12. brigitte.fauroux@trs.ap-hop-paris.fr
Insights
Prenatal tobacco smoke exposure harms infant respiratory health, increasing symptoms and reducing lung function. This avoidable risk factor is linked to SIDS and necessitates preventative measures.
Area of Science:
- Pulmonology and developmental pediatrics.
Context:
- Prenatal tobacco smoke exposure is a significant risk factor for childhood respiratory diseases.
- Nicotine readily crosses the placenta, affecting fetal lung development.
Purpose:
- To elucidate the mechanisms by which prenatal tobacco smoke exposure impacts infant respiratory health and function.
- To highlight the link between in utero smoke exposure and increased susceptibility to respiratory illness and SIDS.
Summary:
- In utero tobacco exposure leads to increased alveolar volumes and decreased airway caliber, impairing airflow in newborns.
- These structural and functional changes render infants more vulnerable to respiratory irritants.
- Nicotine-induced alterations in ventilatory control contribute to the association with sudden infant death syndrome (SIDS).
Impact:
- Highlights the critical need for public health information and preventative strategies to mitigate infant respiratory morbidity and mortality.
- Underscores the importance of smoking cessation during pregnancy to protect infant lung health.
Abstract:
Prenatal exposure to tobacco smoke is associated with a significant increase in respiratory symptoms and a decrease in lung function in children. Epidemiological studies have demonstrated that tobacco smoke exposure represents one of the most important respiratory risk factors in childhood. Nicotine crosses the placenta and activates the nicotinic receptors which are present in a wide range of lung cells during the prenatal period. In utero tobacco exposure is responsible for an increase in alveolar volumes and a decrease in airway walls caliber, which explains the decrease in airflow that is observed during the first days of life in infants of smoking mothers. These structural and functional disturbances explain why these infants are more susceptible to respiratory irritants. The alterations in ventilatory control induced by prenatal exposure to nicotine explain the link between tobacco smoke exposure and the sudden infant death syndrome. This underlines the importance of adequate information and preventative measures to decrease this major and avoidable cause of respiratory morbidity and mortality in infants.