American Association for Cancer Research
10780432ccr173061-sup-190972_2_supp_4692203_p76g4m.pptx (1.3 MB)

Figure S1 from Cross-talk between T Cells and Hematopoietic Stem Cells during Adoptive Cellular Therapy for Malignant Glioma

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posted on 2023-03-31, 20:23 authored by Tyler J. Wildes, Adam Grippin, Kyle A. Dyson, Brandon M. Wummer, David J. Damiani, Rebecca S. Abraham, Catherine T. Flores, Duane A. Mitchell

Intravenously administered HSPCs durably engraft in gliomas, supplant host immunity, and differentiate into antigen-presenting cells.


University of Florida


American Brain Tumor Association

Alex's Lemonade Stand Foundation

Florida Center for Brain Tumor Research

University of Florida, and University of Florida Clinical and Translational Science



Purpose: Adoptive T-cell immunotherapy (ACT) has emerged as a viable therapeutic for peripheral and central nervous system (CNS) tumors. In peripheral cancers, optimal efficacy of ACT is reliant on dendritic cells (DCs) in the tumor microenvironment. However, the CNS is largely devoid of resident migratory DCs to function as antigen-presenting cells during immunotherapy. Herein, we demonstrate that cellular interactions between adoptively transferred tumor-reactive T cells and bone marrow–derived hematopoietic stem and progenitor cells (HSPCs) lead to the generation of potent intratumoral DCs within the CNS compartment.Experimental Design: We evaluated HSPC differentiation during ACT in vivo in glioma-bearing hosts and HSPC proliferation and differentiation in vitro using a T-cell coculture system. We utilized FACS, ELISAs, and gene expression profiling to study the phenotype and function of HSPC-derived cells ex vivo and in vivo. To demonstrate the impact of HSPC differentiation and function on antitumor efficacy, we performed survival experiments.Results: Transfer of HSPCs with concomitant ACT led to the production of activated CD86+CD11c+MHCII+ cells consistent with DC phenotype and function within the brain tumor microenvironment. These intratumoral DCs largely supplanted abundant host myeloid-derived suppressor cells. We determined that during ACT, HSPC-derived cells in gliomas rely on T-cell–released IFNγ to differentiate into DCs, activate T cells, and reject intracranial tumors.Conclusions: Our data support the use of HSPCs as a novel cellular therapy. Although DC vaccines induce robust immune responses in the periphery, our data demonstrate that HSPC transfer uniquely generates intratumoral DCs that potentiate T-cell responses and promote glioma rejection in situ. Clin Cancer Res; 24(16); 3955–66. ©2018 AACR.

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