Abstract: Disclosed are means, treatment methods, and compositions of matter useful for prevention and/or reversion of chronic obstructive pulmonary disease (COPD). In one embodiment the invention provides the administration of mesenchymal stem cells and exosome thereof as a means of augmenting endogenous endothelial regeneration and/or endothelial regeneration stimulated by exogenous means. In some embodiments the invention provides administration of allogeneic mesenchymal stem cells together with autologous endothelial progenitor cells and/or mobilization of said autologous endothelial progenitor cells.