4.5 Review

Air pollution, metabolites and respiratory health across the life-course

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Child serum metabolome and traffic-related air pollution exposure in pregnancy

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Summary: Recent research findings challenge the traditional view of chronic obstructive pulmonary disease (COPD) as solely caused by smoking in genetically susceptible individuals. Instead, COPD is now understood as the potential end result of gene-environment interactions accumulated over an individual's lifetime. Future research should aim to understand the dynamic interactions between genes and the environment by integrating information from basic and clinical omics with exposures over time. Additionally, COPD should be viewed as a clinical syndrome rather than a single disease.

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Integration of gene expression and DNA methylation identifies epigenetically controlled modules related to PM2.5 exposure

Simon Kebede Merid et al.

Summary: Exposure to PM2.5 at birth was found to be associated with differential gene expression in children and adolescents. Additionally, gene modules related to complex diseases were identified in relation to PM2.5 exposure.

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Feiby L. Nassan et al.

Summary: Using a global untargeted metabolomic approach, this study identified significant metabolites and metabolic pathways associated with long-term exposure to PM2.5, NO2, and temperature. This is the largest metabolomics study on long-term air pollution to date, the first to report a metabolic signature of long-term temperature exposure, and the first to use independent component analysis (ICA) in the analysis.

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Audrey J. Gaskins et al.

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Metabolomic signatures of the short-term exposure to air pollution and temperature

Feiby L. Nassan et al.

Summary: This study is the first to report an untargeted metabolomic signature related to temperature exposure, the largest study to date on untargeted metabolomic signature of air pollution, and the first to use ICA. Short-term exposure to air pollution and temperature can affect several important plasma metabolites and metabolic pathways, involving inflammation and oxidative stress, immunity, and nucleic acid damage and repair.

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Summary: This study explored a childhood asthma endotype characterized by reduced sphingolipid concentrations, early onset, and increased airway resistance. Lower concentrations of ceramides and sphingomyelins at 6 months correlated with an increased asthma risk before age 3, while reduced levels of key phosphosphingolipids at age 6 were associated with higher airway resistance. These associations were influenced by the 17q21 genotype and nasal gene expression of SPT.

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Application of high-resolution metabolomics to identify biological pathways perturbed by traffic-related air pollution

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Summary: Pediatric asthma is a major public health challenge, affecting 5-20% of children in Europe and attributed to genetic susceptibility and environmental factors. Metabolomics, as an emerging approach, can provide deeper insight into the pathophysiological mechanisms of asthma, facilitate the discovery of early diagnostic markers and personalized therapies. Analyzing intermediate metabolites in clinical practice may have a positive impact on pediatric asthma management.

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Fine particulate matter exposure and perturbation of serum metabolome: A longitudinal study in Baoding, China

Shu Huan et al.

Summary: A study on 63 healthy college students revealed that exposure to PM2.5 has significant effects on serum metabolomics, particularly impacting metabolic signaling related to oxidative stress and inflammation. Males may be more susceptible to these metabolic perturbations induced by higher PM2.5 exposure.

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Perturbation of amino acid metabolism mediates air pollution associated vascular dysfunction in healthy adults

Baihuan Feng et al.

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