Combination therapy with Treg and mesenchymal stromal cells enhances potency and attenuation of inflammation after traumatic brain injury compared to monotherapy

In this study, we treated a rat controlled cortical impact model of TBI with a combination of two cell therapies: human regulatory T cells (Treg) expanded from umbilical cord blood and human mesenchymal stro mal cells (MSC) isolated from adipose tissue. We found that a sequential staggered delivery of Treg and MSC significantly reduced proliferation of microglia indicating a reduction in neuroinflammation following treatment. AbstractThe inflammatory response after traumatic brain injury (TBI) can lead to significant secondary brain injury and chronic inflammation within the central nervous system. Cell therapies, including mesenchymal stromal cells (MSC), have led to improvements in animal models of TBI and are under investigation in human trials. One potential mechanism for the therapeutic potential of MSC is their ability to augment the endogenous response of immune suppressive regulatory T  cells (Treg). We have recently shown that infusion of human cord blood Treg decreased chronic microgliosis after TBI and altered the systemic immune response in a rodent model. These cells likely use both overlapping and distinct mechanisms to modulate the immune system; therefore, combining Treg and MSC as a combination therapy may confer therapeutic benefit over either monotherapy. However, investigation of Treg + MSC combination therapy in TBI is lacking. In this study, we compared the ability MSC + Treg combination therapy, as well as MSC and Treg monotherapies, to inhi...
Source: Stem Cells - Category: Stem Cells Authors: Tags: TRANSLATIONAL AND CLINICAL RESEARCH Source Type: research