Health Risk and Pathogenesis of PM_2.5 in Human Systems.

Area of Science:

• Environmental Health
• Toxicology
• Molecular Biology

Background:

• Fine particulate matter (PM2.5) represents a major global environmental health concern.
• PM2.5 exposure is linked to diseases affecting numerous organ systems.
• The complex composition and variability of PM2.5 complicate risk assessment and mechanistic studies.

Purpose of the Study:

• To systematically review the toxic effects of PM2.5 across multiple organ systems.
• To elucidate the underlying pathogenic mechanisms of PM2.5 toxicity.
• To identify common and system-specific molecular pathways involved in PM2.5-induced diseases.

Main Methods:

• Systematic literature review of PM2.5 toxicity studies.
• Analysis of shared pathogenic processes including oxidative stress, inflammation, ER stress, autophagy, and apoptosis.
• Examination of system-specific signaling networks activated by PM2.5.

Main Results:

• PM2.5 exerts toxic effects on the respiratory, cardiovascular, nervous, immune, endocrine, digestive, and genitourinary systems.
• Shared molecular pathways like oxidative stress and inflammation are central to PM2.5 pathogenesis.
• System-specific signaling pathways are activated, contributing to multi-systemic disease.

Conclusions:

• PM2.5 induces multi-system toxicity through interconnected molecular pathways.
• Integrating multi-omics and molecular epidemiology is crucial for future research.
• Advanced approaches are needed to develop targeted interventions for PM2.5-related health risks.