Fig. 2From: Impaired training-induced angiogenesis process with loss of pericyte-endothelium interactions is associated with an abnormal capillary remodelling in the skeletal muscle of COPD patientsAssessment of morphologic markers of the angiogenic process before and after exercise training in skeletal muscle biopsies of COPD patients and SHS. a-c Transmission electron micrographs focused on morphologic markers of angiogenesis, shown with black arrows: a intraluminal endothelial (EC) folding, b abluminal EC sprout, and c pericyte/endothelium (Pc/EC) interdigitations. d-f) Semi-quantitative analysis of the occurrence of intraluminal EC folding (d), abluminal EC sprouts (e), and Pc/EC interdigitations (f) on transmission electron micrographs. g, h Quantitative analysis of endothelial nucleus density (g) and pericyte coverage (h) on transmission electron micrographs. Lum: lumen; EC: endothelium; BM: basement membrane; Pc: pericyte. Data are presented as mean ± SE. Linear mixed-effect model: T: Time effect; G: Group effect; GxT: Group x Time interaction. Scale bar: 500 nmBack to article page