Lung-derived cultured mesenchymal stem cells (MSC) show a typical surface marker profile and have a higher colony-forming unit, fibroblast (CFU-F) frequency.

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Presentation transcript:

Lung-derived cultured mesenchymal stem cells (MSC) show a typical surface marker profile and have a higher colony-forming unit, fibroblast (CFU-F) frequency in lung MSC derived from central biopsies compared with peripheral transbronchial biopsies. Lung-derived cultured mesenchymal stem cells (MSC) show a typical surface marker profile and have a higher colony-forming unit, fibroblast (CFU-F) frequency in lung MSC derived from central biopsies compared with peripheral transbronchial biopsies. Primary cells were isolated from the central and peripheral transbronchial lung biopsies of 27 lung-transplanted patients. Single-cell suspensions were assayed for CFU-F content under standard conditions for 14 days. (A) Primary lung cells derived from central biopsies displayed a significantly higher CFU-F frequency compared with peripheral transbronchially derived cells (p=0.0254). Median CFU-F frequencies of individual biopsies are shown as colonies/100 000 seeded cells. Closed circles represent CFU-F numbers from biopsies of individual patients undergoing lung biopsies once after transplantation, whereas open circles represent CFU-F numbers of repetitive biopsies of patients undergoing bronchoscopies at different time points after transplantation. The Mann-Whitney U test was used to calculate p values. *p<0.05. Colonies with ≥40 cells were counted as CFU-F. (B) A typical lung-derived colony stained with crystal violet. (C) Cultured lung MSC (passages 3 and 4) were harvested, stained with surface marker antibodies and analysed with flow cytometry. A representative surface marker profile from central lung-derived MSC of one patient is presented. Sample: red shaded area. Isotype control: grey line. Sara Rolandsson et al. BMJ Open Resp Res 2014;1:e000027 ©2014 by British Thoracic Society