Antitumor Responses in the Absence of Toxicity in Solid Tumors by Targeting B7-H3 via Chimeric Antigen Receptor T Cells

Cancer Cell. 2019 Feb 11;35(2):221-237.e8. doi: 10.1016/j.ccell.2019.01.002.

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.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • B7 Antigens / genetics
  • B7 Antigens / immunology*
  • B7-H1 Antigen / immunology
  • CD28 Antigens / immunology
  • Carcinoma, Pancreatic Ductal / genetics
  • Carcinoma, Pancreatic Ductal / immunology
  • Carcinoma, Pancreatic Ductal / pathology
  • Carcinoma, Pancreatic Ductal / therapy*
  • Cell Line, Tumor
  • Coculture Techniques
  • Female
  • Humans
  • Immunotherapy, Adoptive / adverse effects
  • Immunotherapy, Adoptive / methods*
  • Male
  • Mice, Inbred C57BL
  • Neuroblastoma / genetics
  • Neuroblastoma / immunology
  • Neuroblastoma / pathology
  • Neuroblastoma / therapy*
  • Ovarian Neoplasms / genetics
  • Ovarian Neoplasms / immunology
  • Ovarian Neoplasms / pathology
  • Ovarian Neoplasms / therapy*
  • Pancreatic Neoplasms / genetics
  • Pancreatic Neoplasms / immunology
  • Pancreatic Neoplasms / pathology
  • Pancreatic Neoplasms / therapy*
  • Receptors, Chimeric Antigen / genetics
  • Receptors, Chimeric Antigen / immunology*
  • Signal Transduction
  • Tumor Burden
  • Tumor Necrosis Factor Receptor Superfamily, Member 9 / immunology
  • Xenograft Model Antitumor Assays

Substances

  • B7 Antigens
  • B7-H1 Antigen
  • CD274 protein, human
  • CD276 protein, human
  • CD28 Antigens
  • Cd274 protein, mouse
  • Cd276 protein, mouse
  • Receptors, Chimeric Antigen
  • TNFRSF9 protein, human
  • Tnfrsf9 protein, mouse
  • Tumor Necrosis Factor Receptor Superfamily, Member 9