Engineered binding to erythrocytes induces immunological tolerance to E. coli asparaginase
- Ecole Polytechnique Federale Lausanne (Switzlerland). Inst. of Bioengineering; Anokion SA, Ecublens (Switzerland); DOE/OSTI
- Ecole Polytechnique Federale Lausanne (Switzlerland). Inst. of Bioengineering; Anokion SA, Ecublens (Switzerland)
- Ecole Polytechnique Federale Lausanne (Switzlerland). Inst. of Bioengineering
- Univ. Hospital of Lausanne (Switzerland). Centre Hospitalier Universitaire Vaudois
- Ecole Polytechnique Federale Lausanne (Switzlerland). Inst. of Bioengineering; Anokion SA, Ecublens (Switzerland); Univ. of Chicago, IL (United States). Inst. for Molecular Engineering; Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Antigen-specific immune responses to protein drugs can hinder efficacy and compromise safety because of drug neutralization and secondary clinical complications. We report a tolerance induction strategy to prevent antigen-specific humoral immune responses to therapeutic proteins. Our modular, biomolecular approach involves engineering tolerizing variants of proteins such that they bind erythrocytes in vivo upon injection, on the basis of the premise that aged erythrocytes and the payloads they carry are cleared tolerogenically, driving the deletion of antigen-specific T cells. We demonstrate that binding the clinical therapeutic enzyme Escherichia coli L-asparaginase to erythrocytes in situ antigen-specifically abrogates development of antibody titers by >1000-fold and extends the pharmacodynamic effect of the drug 10-fold in mice. Additionally, a single pretreatment dose of erythrocyte-binding asparaginase tolerized mice to multiple subsequent doses of the wild-type enzyme. This strategy for reducing antigen-specific humoral responses may enable more effective and safer treatment with therapeutic proteins and drug candidates that are hampered by immunogenicity.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1625944
- Journal Information:
- Science Advances, Journal Name: Science Advances Journal Issue: 6 Vol. 1; ISSN 2375-2548
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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Engineering antigen-specific immunological tolerance.
IMMUNOLOGICAL UNRESPONSIVENESS TO PROTEIN ANTIGENS IN RABBITS EXPOSED TO X IRRADIATION OR 6-MERCAPTOPURINE TREATMENT