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The re-emerging role of linoleic acid in paediatric asthma
Sarah Naughten1, Gertrude Ecklu-Mensah1,2, Gailan Constantino3
1Department of Pediatrics, University of California San Diego, La Jolla, CA, USA.
Insights
Linoleic acid, common in Western diets, may influence childhood asthma development and severity. Further research is needed to clarify its role in paediatric asthma pathophysiology.
Area of Science:
- Pediatric Allergy and Immunology
- Nutritional Immunology
- Environmental Health
Background:
- Asthma is a leading chronic childhood illness, influenced by early exposures affecting immune development.
- Microbial and dietary metabolites are implicated in paediatric asthma onset and exacerbation.
- Linoleic acid, an omega-6 polyunsaturated fatty acid, is prevalent in Western diets.
Purpose of the Study:
- To review literature on linoleic acid's role in paediatric asthma development and impact.
- To explore the relationship between human microbial metabolism and childhood allergic diseases.
- To examine mechanistic studies on linoleic acid metabolites in asthma.
Main Methods:
- Literature review of human microbial metabolism and childhood allergic diseases.
- Analysis of cellular and animal models investigating dietary and microbial linoleic acid metabolites.
- Synthesis of studies on linoleic acid metabolites in childhood asthma development and exacerbation.
Main Results:
- Growing evidence suggests a role for linoleic acid in asthma onset and pathophysiology.
- Conflicting data exists, highlighting the need for further investigation.
- Microbial and dietary linoleic acid metabolites are key areas of focus.
Conclusions:
- Linoleic acid metabolites warrant further investigation for their impact on paediatric asthma.
- Additional cellular, animal, and longitudinal studies are recommended.
- Targeting linoleic acid and its metabolites may offer future therapeutic avenues.
Abstract:
Asthma is the most common chronic disease within the paediatric population. Although it is multifactorial, its onset may be linked to early-life exposures with subsequent impact on immune system development. Microbial and dietary metabolic products have been implicated in the development and exacerbation of paediatric asthma. Linoleic acid is the most common omega-6 polyunsaturated fatty acid in the Western diet. In this review, we summarise the literature regarding the involvement of linoleic acid in the development of and its impact on existing paediatric asthma. First, we summarise the existing knowledge surrounding the relationship between human microbial metabolism and allergic diseases in children. Next, we examine cellular or animal model-based mechanistic studies that investigated the impact of dietary- and microbial-derived linoleic acid metabolites on asthma. Finally, we review the literature investigating the impact of linoleic acid metabolites on the development and exacerbation of childhood asthma. While there is conflicting evidence, there is growing support for a role of linoleic acid in the onset and pathophysiology of asthma. We recommend that additional cellular, animal, and longitudinal studies are performed that target linoleic acid and its metabolites.
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