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Generation of Human Chimeric Antigen Receptor Regulatory T Cells.

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January 2025

Department of Microbiology and Immunology, Medical University of South Carolina; Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina; Hollings Cancer Center, Medical University of South Carolina;

Chimeric antigen receptor (CAR) T-cell therapy has reshaped the face of cancer treatment, leading to record remission rates in previously incurable hematological cancers. These successes have spurred interest in adapting the CAR platform to a small yet pivotal subset of CD4 T cells primarily responsible for regulating and inhibiting the immune response, regulatory T cells (Tregs). The ability to redirect Tregs' immunosuppressive activity to any extracellular target has enormous implications for creating cell therapies for autoimmune disease, organ transplant rejection, and graft-versus-host disease.

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Background: Patients who underwent hematopoietic stem cell transplantation (HSCT) are considered at high risk for pediatric intensive care unit (PICU) admission. Therefore, this study aimed to assess outcomes and mortality-related risk factors among pediatric HSCT recipients admitted to the PICU.

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The outcomes of haploidentical hematopoietic cell transplantation (haplo-HCT) have improved with the implication of new in vivo and ex vivo graft-versus-host disease (GVHD) prophylaxis regimens. However, primary graft failure is still reported more frequently in haplo-HCT compared to a matched donor HCT. We conducted a pilot study (NCT04942730) to evaluate the impact of adding bendamustine to fludarabine and busulfan conditioning on engraftment after haplo-HCT.

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Transfusion of blood products is a common lifesaving medical procedure in clinical practice. However, it poses the risk of potential adverse reactions for the recipient. Transfusion-associated graft-versus-host-disease (TA-GVHD) is a rare adverse event, fatal in >90% of cases.

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