Journal
LANCET CHILD & ADOLESCENT HEALTH
Volume 6, Issue 10, Pages 713-724Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S2352-4642(22)00185-7
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Funding
- US National Institutes of Health (NIH)
- Children?s Hospital of Pittsburgh Foundation
- US NIH
- [HL149693]
- [HL141849]
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There is evidence that children with obesity are at a higher risk of asthma and have more severe symptoms compared to children of healthy weight. This review examines the characteristics and underlying mechanisms of this obesity-related asthma phenotype, as well as current treatment recommendations and potential novel therapeutic approaches. The review also highlights the need for further research to improve our understanding and outcomes in children with obesity and asthma.
There is substantial epidemiological and experimental evidence of an obesity-related asthma phenotype. Compared to children of healthy weight, children with obesity are at higher risk of asthma. Children with obesity who have asthma have greater severity and poorer control of their asthma symptoms, more frequent asthma exacerbations, and overall lower asthma-related quality of life than children with asthma who have a healthy weight. In this Review, we examine some of the latest evidence on the characteristics of this phenotype and its main underlying mechanisms, including genetics and genomics, changes in airway mechanics and lung function, sex hormone differences, alterations in immune responses, systemic and airway inflammation, metabolic dysregulation, and modifications in the microbiome. We also review current recommendations for the treatment of these children, including in the management of their asthma, and current evidence for weight loss interventions. We then discuss initial evidence for potential novel therapeutic approaches, such as dietary modifications and supplements, antidiabetic medications, and statins. Finally, we identify knowledge gaps and future directions to improve our understanding of asthma in children with obesity, and to improve outcomes in these susceptible children. We highlight important needs, such as designing paediatric -specific studies, implementing large multicentric trials with standardised interventions and outcomes, and including racial and ethnic groups along with other under-represented populations that are particularly affected by obesity and asthma.
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