Journal: eLife
Article Title: Short-range interactions between fibrocytes and CD8 + T cells in COPD bronchial inflammatory response
doi: 10.7554/eLife.85875
Figure Lengend Snippet: ( A, B ) Representative stainings of CD8 (brown, A ), CD45 (red, B ), and FSP1 (green, B ) in distal bronchial tissue specimens from a control subject (left) and a COPD patient (right). The yellow arrowheads indicate fibrocytes, defined as CD45 + FSP1 + cells. ( C ) Quantification of CD8 + T cells and fibrocyte densities (normalized by the sub-epithelial area) in one specimen/patient (n=20 control subjects, n=12 patients with COPD). ( D ) Merged segmented images for CD8 and CD45-FSP1 staining, showing CD8 + T cells and CD45 + FSP1 + cells, respectively, in magenta and yellow. The white arrows indicate interacting cells, detected by dilatation of CD8 positive particles. ( E ) Table showing the correspondence between dilatations in pixels and µm. ( F ) Quantification of interacting cell densities (normalized by the sub-epithelial area) in one specimen/patient, using the different dilatations sizes ( E ). ( G ) Distance maps built from the binary image produced from CD8 staining, with FSP1 + CD45 + cells (blue outlines). ( H ) Quantification of the mean minimal distances between fibrocyte and CD8 + T cells in one specimen/patient. ( I ) Cluster analysis performed by Delaunay triangulation on segmented images for CD8 and CD45-FSP1 staining, followed by the application of a threshold value (40 μm) above which connections are not kept. CD8 + T cells and fibrocytes appear, respectively, with green and red dots, connections are shown in blue. ( J ) First row: densities of clusters containing exclusively CD8 + T cells (‘CD8 clusters’), fibrocytes (‘Fib clusters’), and both cell types (‘CD8-Fib clusters’) normalized by the sub-epithelial area in one specimen/patient. Second row: mean number of cells by cluster. ( C, F, H, J ) The medians are represented as horizontal lines, n=20 specimens from control subjects, n=12 specimens from patients with COPD. *p<0.05, **p<0.01; ***p<0.001. unpaired t-tests or Mann-Whitney tests.
Article Snippet: Cells were stained with anti-CD8-PerCP-Vio700 or anti-CD4-PerCP-Vio700, anti-CD45-RA-FITC, and then fixed, permeabilized using the IntraPrep Permeabilization Reagent Kit (Beckman Coulter) and stained with anti-Granzyme-APC, anti-TNF-α-PE, anti-IFN-γ-APC, anti-IL-17- PE-Cy7, anti-IL-10-PE or isotype controls (Miltenyi Biotech, Paris, France).
Techniques: Staining, Produced, MANN-WHITNEY