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Category Archives: Publications

CD25 Blockade Delays Regulatory T Cell Reconstitution and Does Not Prevent Graft-versus-Host Disease After Allogeneic Hematopoietic Cell Transplantation

Daclizumab, a humanized monoclonal antibody, binds CD25 and blocks formation of the IL-2 receptor on T cells. A study of daclizumab as acute graft-versus- host disease (GVHD) prophylaxis after unrelated bone marrow transplantation was conducted before the importance of CD25+FOXP3+ regulatory T cells (Tregs) was recognized. Tregs can abrogate the onset of GVHD. The relation between Tregs and a graft-versus-malignancy effect is not fully understood….. Continue Reading

Mesenchymal stromal cell therapy to promote cardiac tissue regeneration and repair

During this period, reports published on MSCs address the best MSC tissue source for cellular therapy, mechanisms of MSC activity and improving MSC longevity, and homing in vivo. Currently, there is no definitive therapeutic advantage of any one tissue-derived MSC over another, and even combination therapies struggle with conflicting outcomes. MSC activity, persistence in vivo, or homing can be improved by priming strategies, genetic modification, or biomaterials. Despite numerous studies showing improvement in heart function after acute cardiac injury, the reproducibility and efficacy of the therapy remains elusive and falls short of expectations in clinical trials… Continue Reading

TLR3 or TLR4 Activation Enhances Mesenchymal Stromal Cell-Mediated Treg Induction via Notch Signaling.

Mesenchymal stromal cells (MSCs) are the subject of numerous clinical trials, largely due to their immunomodulatory and tissue regenerative properties. Toll-like receptors (TLRs), especially TLR3 and TLR4, are highly expressed on MSCs and their activation can significantly modulate the immunosuppressive and anti-inflammatory functions of MSCs. While MSCs can recruit and promote the generation of regulatory T cells (Tregs), the effect of TLR activation on MSC-mediated Treg induction is unknown. In this study, we investigated the effect of ligand-mediated activation of TLR3 and TLR4 on Treg induction by human MSCs…. Continue Reading

Rapid isolation of bone marrow mesenchymal stromal cells using integrated centrifuge-based technology

The use of bone marrow–derived mesenchymal stromal cells (MSCs) in cell-based therapies is currently being developed for a number of diseases. Thus far, the clinical results have been inconclusive and variable, in part because of the variety of cell isolation procedures and culture conditions used in each study. A new isolation technique that streamlines the method of concentration and demands less time and attention could provide clinical and economic advantages compared with current methodologies… Continue Reading

Human Mesenchymal Stromal Cells Improve Cardiac Perfusion in an Ovine Immunocompetent Animal Model

Mesenchymal stromal cells (MSCs) hold considerable promise in the treatment of ischemic heart disease. Most preclinical studies of MSCs for acute myocardial infarction (AMI) have been performed either in syngeneic animal models or with human cells in xenogeneic immunodeficient animals. A preferable pre-clinical model, however, would involve human MSCs in an immunocompetent animal. … Continue Reading