Dose-response relationships between polycyclic aromatic hydrocarbons exposure and platelet indices

Area of Science:

• Environmental Health
• Toxicology
• Hematology

Background:

• Polycyclic aromatic hydrocarbons (PAHs) are environmental pollutants with potential health effects.
• The relationship between PAH exposure and platelet indices is not well understood.
• Platelet indices are associated with various cardiovascular and inflammatory conditions.

Purpose of the Study:

• To investigate the linear and non-linear associations between exposure to specific polycyclic aromatic hydrocarbons (PAHs) metabolites and various platelet indices.
• To determine if serum platelet indices can serve as biomarkers for environmental PAH exposure.

Main Methods:

• Utilized baseline data from the Wuhan-Zhuhai Cohort Study.
• Employed generalized linear models, multivariate logistic regression, and restricted cubic splines (RCS) for analysis.
• Assessed relationships between urinary monohydroxylated PAH metabolites (e.g., ΣOHNa, ΣOHPh, ΣOH-PAHs, 1-OHP) and platelet indices (MPV, MPVP, PDW, PLR).

Main Results:

• Non-linear relationships were observed in Wuhan individuals between specific PAH metabolites (ΣOHNa, ΣOHPh, ΣOH-PAHs, 1-OHP) and platelet indices (MPV, MPVP, PDW, PLR).
• No significant linear or non-linear associations were found between PAH metabolites and platelet indices in Zhuhai individuals.
• Serum mean platelet volume (MPV) and the ratio of mean platelet volume to platelet count (MPVP) emerged as potential independent biomarkers.

Conclusions:

• Serum MPV and MPVP may act as independent biomarkers indicating the effects of environmental PAH exposure on human health.
• The observed associations were specific to certain PAH metabolites and geographical locations (Wuhan).
• Further research is warranted to elucidate the mechanisms linking PAH exposure and platelet alterations.