Abstract
The high expression across multiple tumor types and restricted expression in normal tissues make B7-H3 an attractive target for immunotherapy. We generated chimeric antigen receptor (CAR) T cells targeting B7-H3 (B7-H3.CAR-Ts) and found that B7-H3.CAR-Ts controlled the growth of pancreatic ductal adenocarcinoma, ovarian cancer and neuroblastoma in vitro and in orthotopic and metastatic xenograft mouse models, which included patient-derived xenograft. We also found that 4-1BB co-stimulation promotes lower PD-1 expression in B7-H3.CAR-Ts, and superior antitumor activity when targeting tumor cells that constitutively expressed PD-L1. We took advantage of the cross-reactivity of the B7-H3.CAR with murine B7-H3, and found that B7-H3.CAR-Ts significantly controlled tumor growth in a syngeneic tumor model without evident toxicity. These findings support the clinical development of B7-H3.CAR-Ts.
Keywords:
4-1BB; B7-H3; CD28; PD-1/PD-L1; chimerc antigen receptor; neuroblastoma; ovarian cancer; pancreatic cancer; solid tumors.
Copyright © 2019 Elsevier Inc. All rights reserved.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
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Animals
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B7 Antigens / genetics
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B7 Antigens / immunology*
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B7-H1 Antigen / immunology
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CD28 Antigens / immunology
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Carcinoma, Pancreatic Ductal / genetics
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Carcinoma, Pancreatic Ductal / immunology
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Carcinoma, Pancreatic Ductal / pathology
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Carcinoma, Pancreatic Ductal / therapy*
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Cell Line, Tumor
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Coculture Techniques
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Female
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Humans
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Immunotherapy, Adoptive / adverse effects
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Immunotherapy, Adoptive / methods*
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Male
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Mice, Inbred C57BL
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Neuroblastoma / genetics
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Neuroblastoma / immunology
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Neuroblastoma / pathology
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Neuroblastoma / therapy*
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Ovarian Neoplasms / genetics
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Ovarian Neoplasms / immunology
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Ovarian Neoplasms / pathology
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Ovarian Neoplasms / therapy*
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Pancreatic Neoplasms / genetics
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Pancreatic Neoplasms / immunology
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Pancreatic Neoplasms / pathology
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Pancreatic Neoplasms / therapy*
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Receptors, Chimeric Antigen / genetics
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Receptors, Chimeric Antigen / immunology*
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Signal Transduction
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Tumor Burden
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Tumor Necrosis Factor Receptor Superfamily, Member 9 / immunology
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Xenograft Model Antitumor Assays
Substances
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B7 Antigens
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B7-H1 Antigen
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CD274 protein, human
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CD276 protein, human
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CD28 Antigens
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Cd274 protein, mouse
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Cd276 protein, mouse
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Receptors, Chimeric Antigen
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TNFRSF9 protein, human
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Tnfrsf9 protein, mouse
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Tumor Necrosis Factor Receptor Superfamily, Member 9