RT Journal Article T1 Factory neovessels: engineered human blood vessels secreting therapeutic proteins as a new drug delivery system A1 Compte, Marta A1 Alonso-Camino, Vanesa A1 Cuesta Martínez, Ángel A1 Santos-Valle, Patricia A1 Sánchez-Martín, David A1 López, Mariola A1 Vicario, José Luis A1 Salas, Clara A1 Sanz, Laura A1 Álvarez-Vallina, Luis AB Several works have shown the feasibility of engineering functional blood vessels in vivo using human endothelial cells (ECs). Going further, we explored the therapeutic potential of neovessels after gene-modifying the ECs for the secretion of a therapeutic protein. Given that these vessels are connected with the host vascular bed, we hypothesized that systemic release of the expressed protein is immediate. As a proof of principle, we used primary human ECs transduced with a lentiviral vector for the expression of a recombinant bispecific αCEA/αCD3 antibody. These ECs, along with mesenchymal stem cells as a source of mural cells, were embedded in Matrigel and subcutaneously implanted in nude mice. High antibody levels were detected in plasma for 1 month. Furthermore, the antibody exerted a therapeutic effect in mice bearing distant carcinoembryonic-antigen (CEA)-positive tumors after inoculation of human T cells. In summary, we show for the first time the therapeutic effect of a protein locally secreted by engineered human neovessels. PB Springer Nature SN 0969-7128 YR 2010 FD 2010 LK https://hdl.handle.net/20.500.14352/93824 UL https://hdl.handle.net/20.500.14352/93824 LA eng NO Compte M, Alonso-Camino V, Santos-Valle P, et al. Factory neovessels: engineered human blood vessels secreting therapeutic proteins as a new drug delivery system. Gene Ther. 2010;17(6):745-751. doi:10.1038/gt.2010.33 NO Ministerio de Ciencia e Innovación (España) NO Comunidad de Madrid NO Fondo de Investigación Sanitaria NO Instituto de Salud Carlos III NO Gobierno Vasco NO European Commission DS Docta Complutense RD 16 abr 2025