Abstract |
The graft-versus- tumor (GVT) effect after allogeneic hematopoietic cell transplantation (allo-HCT) represents an effective form of immunotherapy against many malignancies. Meaningful separation of the potentially curative GVT responses from graft-versus-host disease (GVHD), the most serious toxicity following T-cell replete allo-HCT, has been an elusive goal. GVHD is initiated by alloantigens, although both alloantigens and tumor-specific antigens (TSAs) initiate GVT responses. Emerging data have illuminated a role for antigen-presenting cells (APCs) in inducing alloantigen-specific responses. By using multiple clinically relevant murine models, we show that a specific subset of host-derived APCs-CD8(+) dendritic cells (DCs)-enhances TSA responses and is required for optimal induction of GVT. Stimulation of TLR3, which among host hematopoietic APC subsets is predominantly expressed on CD8(+) DCs, enhanced GVT without exacerbating GVHD. Thus, strategies that modulate host APC subsets without direct manipulation of donor T cells could augment GVT responses and enhance the efficacy of allo-HCT.
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Authors | Tomomi Toubai, Yaping Sun, Gary Luker, Jun Liu, Kathryn E Luker, Isao Tawara, Rebecca Evers, Chen Liu, Nathan Mathewson, Chelsea Malter, Evelyn Nieves, Sung Choi, Kenneth M Murphy, Pavan Reddy |
Journal | Blood
(Blood)
Vol. 121
Issue 20
Pg. 4231-41
(May 16 2013)
ISSN: 1528-0020 [Electronic] United States |
PMID | 23520337
(Publication Type: Journal Article, Research Support, N.I.H., Extramural)
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Chemical References |
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Topics |
- Animals
- Bone Marrow Transplantation
(immunology, physiology)
- CD8 Antigens
(metabolism)
- Cells, Cultured
- Dendritic Cells
(metabolism, physiology)
- Female
- Graft vs Tumor Effect
(immunology, physiology)
- Leukemia
(immunology, therapy)
- Lymphoma
(immunology, therapy)
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Transgenic
- Tissue Donors
- Transplantation, Homologous
- Up-Regulation
(immunology)
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