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. 2022 Jan 12;23:8. doi: 10.1186/s12931-022-01929-7

Fig. 2.

Fig. 2

a Relative gene expression of hepcidin in COPD patients based on stable sputum macrophage iron content. Data shown as median (IQR). HAMP hepcidin antimicrobial peptide; SHI sputum hemosiderin index. b Relative gene expression of ferroportin in COPD patients based on stable sputum macrophage iron content. Data shown as median (IQR). SLC40A1, solute carrier family 40 member 1; SHI sputum hemosiderin index. ***p < 0.001