Blanco Fernández, BárbaraGarrido, CristinaRubí Sans, GerardSánchez Cid, LourdesGuerra Rebollo, MartaRubio Vidal, NúriaMateos Timoneda, Miguel ÁngelEngel, ElisabethPérez Amodio, Soledad2022-03-222023-01-132021-02-010928-4931https://hdl.handle.net/2445/184321Thymidine kinase expressing human adipose mesenchymal stem cells (TK-hAMSCs) in combination with ganciclovir (GCV) are an effective platform for antitumor bystander therapy in mice models. However, this strategy requires multiple TK-hAMSCs administrations and a substantial number of cells. Therefore, for clinical translation, it is necessary to find a biocompatible scaffold providing TK-hAMSCs retention in the implantation site against their rapid wash-out. We have developed a microtissue (MT) composed by TKhAMSCs and a scaffold made of polylactic acid microparticles and cell-derived extracellular matrix deposited by hAMSCs. The efficacy of these MTs as vehicles for TK-hAMSCs/GCV bystander therapy was evaluated in a rodent model of human prostate cancer. Subcutaneously implanted MTs were integrated in the surrounding tissue, allowing neovascularization and maintenance of TK-hAMSCs viability. Furthermore, MTs implanted beside tumors allowed TK-hAMSCs migration towards tumor cells and, after GCV administration, inhibited tumor growth. These results indicate that TK-hAMSCs-MTs are promising cell reservoirs for clinical use of therapeutic MSCs in bystander therapies.13 p.application/pdfengcc by-nc-nd (c) Elsevier, 2021http://creativecommons.org/licenses/by-nc-sa/3.0/es/NanomedicinaCàncerNanomedicineCancerinfo:eu-repo/semantics/article2022-03-11info:eu-repo/semantics/openAccess647048733579487