Cited by 326Cancer Immunotherapy and BiomarkersTryptophan and brain disordersCancer Research and Treatments

Reversal of indoleamine 2,3-dioxygenase-mediated cancer immune suppression by systemic kynurenine depletion with a therapeutic enzyme

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Triplett, Todd A, Garrison, Kendra C, Marshall, Nicholas, Donkor, Moses, Blazeck, John, Lamb, Candice, Qerqez, Ahlam, Dekker, Joseph D +18 more·2018·Nature Biotechnology

Abstract

Increased tryptophan (Trp) catabolism in the tumor microenvironment (TME) can mediate immune suppression by upregulation of interferon (IFN)-γ-inducible indoleamine 2,3-dioxygenase (IDO1) and/or ectopic expression of the predominantly liver-restricted enzyme tryptophan 2,3-dioxygenase (TDO). Whether these effects are due to Trp depletion in the TME or mediated by the accumulation of the IDO1 and/or TDO (hereafter referred to as IDO1/TDO) product kynurenine (Kyn) remains controversial. Here we show that administration of a pharmacologically optimized enzyme (PEGylated kynureninase; hereafter referred to as PEG-KYNase) that degrades Kyn into immunologically inert, nontoxic and readily cleared metabolites inhibits tumor growth. Enzyme treatment was associated with a marked increase in the tumor infiltration and proliferation of polyfunctional CD8+ lymphocytes. We show that PEG-KYNase administration had substantial therapeutic effects when combined with approved checkpoint inhibitors or with a cancer vaccine for the treatment of large B16-F10 melanoma, 4T1 breast carcinoma or CT26 colon carcinoma tumors. PEG-KYNase mediated prolonged depletion of Kyn in the TME and reversed the modulatory effects of IDO1/TDO upregulation in the TME.

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Authors
Triplett, T. A., Garrison, K. C., Marshall, N., Donkor, M., Blazeck, J., Lamb, C., Qerqez, A., Dekker, J. D., Tanno, Y., Lu, W.-C., Karamitros, C. S., Ford, K., Tan, B., Zhang, X. M., McGovern, K., Coma, S., Kumada, Y., Yamany, M. S., Sentandreu, E., Fromm, G., Tiziani, S., Schreiber, T. H., Manfredi, M., Ehrlich, L. I. R., Stone, E., & Georgiou, G.
Affiliations
  • The University of Texas at Austin (US)
  • Merck & Co., Inc., Rahway, NJ, USA (United States) (US)
  • Kyoto Institute of Technology (JP)
  • Heat Biologics (United States) (US)
Corresponding author
  • Stone, Everett
  • Georgiou, George
Venue
Nature Biotechnology
Published
2018-07-16
Volume
36
Issue
8
Pages
758-764
ISSN
  • 0733-222X (ISSN-L)
  • 1087-0156
  • 1546-1696
OpenAlex
W2883967352
Cited by
321
References
40
Citations by year
2026: 39 · 2025: 40 · 2024: 52 · 2023: 43 · 2022: 49 · 2021: 44 · 2020: 29 · 2019: 22 · 2018: 3
FWCI
9.49
Type
journal article
Language
en
Open access
Locations
  • Nature Biotechnology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Cancer Institute (R01CA189623)
Topics
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Cancer Research and Treatments
Keywords
indoleamine 2,3-dioxygenase, tryptophan 2,3-dioxygenase, kynurenine, kynureninase, tumor immunosuppression, tryptophan catabolism, tumor microenvironment, CD8+ T cells, immune checkpoint inhibitors, cancer vaccines, melanoma, breast cancer, colon cancer, enzyme therapy
MeSH terms
Adjuvants, Immunologic, Animals, Humans, Hydrolases, Kynurenine, Neoplasms, Cancer Vaccines, Cell Line, Tumor, Indoleamine-Pyrrole 2,3,-Dioxygenase, Tumor Microenvironment

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