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Intra-tracheal instillation of PM2.5alters lipid metabolism in the lung. (A) PCA scatter plot of the lipid metabolites from BALF. (B) Heat map of the lipid metabolic profile from BALF. (C) PLS-DA scatter plot of the lipid metabolites from BALF. (D) VIP score plot of the lipid metabolites from BALF. PM2.5 (45 mg/kg) was intra-tracheally instilled into rats on the 1st, 3rd and 6th days (n = 3–5).
