Figure 7. Translational potential of MPO as an imaging target for organ rejection.
(A) MPO protein levels measured by flow cytometry in human blood monocyte subsets. (B) MPO in biopsy samples from patients after heart transplantation. H&E stain and immunoreactive staining for MPO in representative sections from patient biopsies. Patient on left had no signs of rejection (grade 0) and no MPO+ cells, whereas patient on the right was graded 3R (severe rejection/high grade infiltrate) and showed MPO+ cells on immunoreactive staining. Scale bar: 20 μm. (C) Quantification of MPO+ cells in patients with no (ISHLT grade 0), mild (1R), and high grade (2/3R) cellular infiltration. Data are shown as mean ± SEM.
