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A small molecule screen for enhanced homing of systemically infused cells #MMPMID25732817
Levy O; Mortensen LJ; Boquet G; Tong Z; Perrault C; Benhamou B; Zhang J; Stratton T; Han E; Safaee H; Musabeyezu J; Yang Z; Multon MC; Rothblatt J; Deleuze JF; Lin CP; Karp JM
Cell Rep 2015[Mar]; 10 (8): 1261-8 PMID25732817show ga
Poor homing of systemically infused cells to disease sites may limit the success of exogenous cell-based therapy. In this study, we screened 9,000 signal transduction modulators to identify hits that increase mesenchymal stromal cell (MSC) surface expression of homing ligands that bind to ICAM-1, such as CD11a. Pretreatment of MSCs with Ro-31-8425, an identified hit from this screen, increased MSC firm adhesion to an ICAM-1-coated substrate in-vitro, and enabled targeted delivery of systemically administered MSCs to inflamed sites in-vivo in a CD11a (and other ICAM-1-binding domains)-dependent manner. This resulted in a heightened anti-inflammatory response. This represents a new strategy for engineering cell homing to enhance therapeutic efficacy and validates CD11a/ICAM-1 as potential targets. Altogether, this multi-step screening process may significantly improve clinical outcomes of cell-based therapies.