Fig. 1: Luminal epithelial cell type composition differs along the human and rat airway tree.
From: Structure and function relationships of mucociliary clearance in human and rat airways
a Airway branching generations in human and rat investigated in this study included BG0-6 in humans and BG0-5 in rats. b Workflow for imaging luminal epithelial cell type composition and ciliary beat and clearance function in airway samples. Schematic: Created in BioRender. Nawroth, J. (2025) https://BioRender.com/a01i578). c Example IF staining of cilia (ATUB, magenta) and secretory cells (SCGB1A1, green; MUC5AC, gray) in human and rat airway epithelium in BG0 (trachea) and BG5/6. Scale bar: 20 µm. d Quantification of luminal cell proportions labeled with ATUB (ciliated cells) or with MUC5AC and/or SCGB1A1 (secretory cells) as a function of airway branching generation in human and rat airway epithelium. Inset: Percentage of human secretory cell population positive for only MUC5AC (gray), only for SCGB1A1 (green), or for both (white) as a function of branching generation. Solid line: mean, shaded region: SEM. Numbers of human donors (2–3 FOVs each): BG0, n = 3; BG1, n = 3; BG2, n = 5; BG3, n = 3; BG4, n = 7; BG5, n = 2; BG6, n = 2; Numbers of rat donors (2–3 FOVs each): BG0, n = 5; BG1, n = 3; BG2, n = 2; BG4, n = 1; BG5, n = 1. For full donor information see Supplementary Tables 1 and 2. Source data for (d) are provided as a Source Data file.
