Personal exposure to fine particulate matter and renal function in children: A panel study

Area of Science:

• Environmental Health
• Pediatric Nephrology
• Toxicology

Background:

• Limited evidence exists on short-term fine particulate matter (PM2.5) exposure and children's renal function.
• The underlying mechanisms, particularly the role of cytokines, remain unclear.

Purpose of the Study:

• To investigate the association between short-term PM2.5 exposure and renal function in children.
• To explore the mediating role of serum cytokines, specifically CCL27, in this relationship.

Main Methods:

• A panel study involving 105 children (aged 4-13 years) in Wuhan, China.
• Continuous monitoring of personal PM2.5 exposure for 72 hours before health examinations.
• Linear mixed-effects models and mediation analysis to assess PM2.5 effects on estimated glomerular filtration rate (eGFR) and cytokine roles.

Main Results:

• Short-term PM2.5 exposure showed a dose-responsive relationship with decreased eGFR within 2 days, peaking at lag 0.
• The inverse association was stronger in younger children (4-6 years), boys, and those living near major roads.
• Serum chemokine ligand 27 (CCL27) mediated 3.75%-6.61% of the relationship between PM2.5 and reduced eGFR.

Conclusions:

• Short-term PM2.5 exposure is associated with reduced renal function in healthy children.
• The mechanism involves a dose-dependent decrease in eGFR, partly mediated by CCL27.
• Even PM2.5 levels below Chinese air quality standards can impact children's kidney function.