Combined Mesenchymal Stromal Cell Therapy and ECMO in ARDS: A Controlled Experimental Study in Sheep

on behalf of the Combining Extracorporeal Life Support and Cell Therapy in Critical Illness (CELTIC) investigators. This study, employing a 24-hour, large animal model of ARDS and ECMO, examined the safety and efficacy of MSC therapy. We found that endobronchially administered MSCs adhere to, and impair, membrane oxygenators in-vivo . MSCs did not improve oxygenation or other ventilatory parameters but did reduce the severity of histological evidence of lung injury. Our data also suggest that MSCs may reduce circulatory shock associated with ARDS. There were no adverse effects of MSC administration on renal or liver function. Abstract Rationale Mesenchymal stromal cell therapy is a promising intervention for ARDS, although trials to date have not investigated its use alongside ECMO. Recent pre-clinical studies have suggested that combining these interventions may attenuate the efficacy of ECMO. Objectives To determine the safety and efficacy of mesenchymal stromal cell therapy in a model of ARDS and ECMO. Mitochondrial Transfer via Tunneling Nanotubes is an Important Mechanism by Which Mesenchymal Stem Cells Enhance Macrophage

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