Cited by 833CAR-T cell therapy researchCancer Immunotherapy and BiomarkersImmunotherapy and Immune Responses

Targeted delivery of a PD-1-blocking scFv by CAR-T cells enhances anti-tumor efficacy in vivo

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Rafiq, Sarwish, Yeku, Oladapo O, Jackson, Hollie J, Purdon, Terence J, van Leeuwen, Dayenne G, Drakes, Dylan J, Song, Mei, Miele, Matthew M +9 more·2018·Nature Biotechnology

Abstract

The efficacy of chimeric antigen receptor (CAR) T cell therapy against poorly responding tumors can be enhanced by administering the cells in combination with immune checkpoint blockade inhibitors. Alternatively, the CAR construct has been engineered to coexpress factors that boost CAR-T cell function in the tumor microenvironment. We modified CAR-T cells to secrete PD-1-blocking single-chain variable fragments (scFv). These scFv-secreting CAR-T cells acted in both a paracrine and autocrine manner to improve the anti-tumor activity of CAR-T cells and bystander tumor-specific T cells in clinically relevant syngeneic and xenogeneic mouse models of PD-L1+ hematologic and solid tumors. The efficacy was similar to or better than that achieved by combination therapy with CAR-T cells and a checkpoint inhibitor. This approach may improve safety, as the secreted scFvs remained localized to the tumor, protecting CAR-T cells from PD-1 inhibition, which could potentially avoid toxicities associated with systemic checkpoint inhibition.

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  • Modified CAR-T cells that secrete PD-1-blocking single-chain variable fragments had improved antitumor activity by an autocrine and paracrine manner.

    “Moreover, modified CAR-T cells, which secret PD-1-blocking single-chain variable fragments (scFv), had improved antitumor activity by an autocrine and paracrine manner [345].”

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Authors
Rafiq, S., Yeku, O. O., Jackson, H. J., Purdon, T. J., van Leeuwen, D. G., Drakes, D. J., Song, M., Miele, M. M., Li, Z., Wang, P., Yan, S., Xiang, J., Ma, X., Seshan, V. E., Hendrickson, R. C., Liu, C., & Brentjens, R. J.
Affiliations
  • Memorial Sloan Kettering Cancer Center (US)
  • Cornell University (US)
  • Weill Cornell Medicine (US)
  • Eureka Therapeutics (United States) (US)
Corresponding author
Brentjens, Renier J
Venue
Nature Biotechnology
Published
2018-08-13
Volume
36
Issue
9
Pages
847-856
ISSN
  • 0733-222X (ISSN-L)
  • 1087-0156
  • 1546-1696
OpenAlex
W2886131798
Cited by
833
References
46
Citations by year
2026: 78 · 2025: 94 · 2024: 91 · 2023: 114 · 2022: 123 · 2021: 121 · 2020: 122 · 2019: 72 · 2018: 14 · 2017: 1 · 2012: 1
FWCI
31.01
Type
journal article
Language
en
Open access
Locations
  • Nature Biotechnology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (1s10od010598-01)
  • National Cancer Institute (P01CA190174, P50CA192937, P30CA008748)
Topics
  • Health Sciences › Medicine › Oncology › CAR-T cell therapy research
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
chimeric antigen receptor T cells, anti-PD-1 therapy, scFv, chimeric antigen receptor, immune checkpoint blockade, PD-L1, paracrine signaling, autocrine signaling, bystander T cells, tumor microenvironment, hematologic malignancies, solid tumors, CAR T cell safety
MeSH terms
Receptors, Chimeric Antigen, Animals, Humans, T-Lymphocytes, Xenograft Model Antitumor Assays, Mice, Single-Chain Antibodies, Tumor Microenvironment, Programmed Cell Death 1 Receptor

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