• High-resolution mass spectrometric analysis of the secretome from mouse lung endothelial progenitor cells.

      Hemmen, Katherina; Reinl, Tobias; Buttler, Kerstin; Behler, Friederike; Dieken, Hauke; Jänsch, Lothar; Wilting, Jörg; Weich, Herbert A; Department of Gene Regulation, HZI, Build. D, Inhoffenstr. 7, 38124, Braunschweig, Germany. katharina.hemmen@ewetel.net (2011-05)
      Recently, we isolated and characterized resident endothelial progenitor cells from the lungs of adult mice. These cells have a high proliferation potential, are not transformed and can differentiate into blood- and lymph-vascular endothelial cells under in vitro and in vivo conditions. Here we studied the secretome of these cells by nanoflow liquid chromatographic mass spectrometry (LC-MS). For analysis, 3-day conditioned serum-free media were used. We found 133 proteins belonging to the categories of membrane-bound or secreted proteins. Thereby, several of the membrane-bound proteins also existed as released variants. Thirty-five proteins from this group are well known as endothelial cell- or angiogenesis-related proteins. The MS analysis of the secretome was supplemented and confirmed by fluorescence activated cell sorting analyses, ELISA measurements and immunocytological studies of selected proteins. The secretome data presented in this study provides a platform for the in-depth analysis of endothelial progenitor cells and characterizes potential cellular markers and signaling components in hem- and lymphangiogenesis.
    • Mouse lung contains endothelial progenitors with high capacity to form blood and lymphatic vessels.

      Schniedermann, Judith; Rennecke, Moritz; Buttler, Kerstin; Richter, Georg; Städtler, Anna-Maria; Norgall, Susanne; Badar, Muhammad; Barleon, Bernhard; May, Tobias; Wilting, Jörg; et al. (2010)
      Postnatal endothelial progenitor cells (EPCs) have been successfully isolated from whole bone marrow, blood and the walls of conduit vessels. They can, therefore, be classified into circulating and resident progenitor cells. The differentiation capacity of resident lung endothelial progenitor cells from mouse has not been evaluated.