Air pollution components linked to heart and lung problems
In older adults, a rise spanning the middle half of chloride exposure levels was linked to 3.48% higher blood pressure between heartbeats.
313 measurements
Limit: Blood pressure and a lung-function ratio served as proxies for heart and lung disease
Edited by Boris Djordjevic · AgingResearch.News
In older adults, researchers used personal exposure monitoring in a longitudinal observational study with 313 measurements to examine fine-particle pollution and heart and lung function. They identified chloride, nickel, barium and selenium as key components associated with poorer function.
A rise spanning the middle half of nickel exposure levels was associated with a 0.09% decrease in a lung-function ratio: air exhaled in the first second of a forced breath divided by the total exhaled. The researchers also analyzed DNA methylation—chemical tags on DNA—and gene activity as possible links between exposure and these changes. Their analyses suggested possible roles for pathways involving nerve signaling, metabolism and cardiovascular function.
Why it matters
Heart and lung problems in older adults make it important to distinguish the risks linked to individual pollution components, rather than treating fine particles as a single exposure.
Caveats
This observational study could not establish that pollution components caused dysfunction or that the proposed molecular pathways mediated it. The abstract reported 313 measurements but did not give the number of participants or their age range.
The paper
Chinese Center For Disease Control and Prevention
Environmental Science & Technology, Sep 22, 2026
