MARCO and bronchopulmonary dysplasia: To further validate this finding, we showed that in lung tissue sections from hyperoxic mice and BPD patients, the expression of Inhba/INHBA and Marco/MARCO was more strongly expressed in Ptprc/PTPRC + leukocytes morphologically resembling alveolar macrophages, compared to the healthy control lungs (Fig. 6f and Supplementary Fig. 8e, respectively).