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The Mystery of Antibodies Against Polyethylene Glycol (PEG) - What do we Know?

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Abstract

Purpose

Recent findings demonstrated anti-PEG antibody formation in some healthy individuals and patients who have not received PEGylated biotherapeutics. Some of these findings evoked criticism because of shortcomings in the antibody assays used. To better understand this topic, we established robust antibody analytics and screened two cohorts of healthy individuals and one cohort of hemophilia patients for the expression of anti-PEG antibodies.

Methods

A flow cytometry approach and a fully validated ELISA platform were established to detect specific anti-PEG antibodies. Immunohistochemistry was used to test for potential binding of anti-PEG antibodies to human tissues.

Results

IgM and/or IgG anti-PEG antibodies are expressed by some healthy individuals and by some patients with hemophilia who have not received PEGylated biotherapeutics. These antibodies can be either transient or persistent and recognize PEGs of different sizes with or without terminal methoxy groups. Age and location of healthy individuals influence the prevalence of IgG but not of IgM antibodies. Anti-PEG antibodies do not cross-react with human tissues supporting the safety of the antibodies.

Conclusion

We confirm that some healthy individuals and some patients with hemophilia express specific antibodies against PEG which are not associated with any pathology and do not bind to human tissues.

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Abbreviations

CI:

Confidence intervals

CRO:

Contract research organisation

ELISA:

Enzyme linked immunosorbent assay

FCM:

Flow cytometry

FDA:

Food and drug administration

GLP:

Good laboratory practice

IHC:

Immunohistochemistry

KA :

Equilibrium association constant

PEG:

Polyethylene glycol

PK:

Pharmacokinetic

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Acknowledgments and Disclosures

The authors are grateful to Julia Stevens (Asterand Bioscience) for conducting the human tissue cross-reactivity study. Moreover, we thank Neriman Yildiz, Margit Pichler and Silvia Neppl for technical assistance. The authors also thank Karima Benamara for editing the manuscript.

Contribution

C. L. designed research, performed experiments, analyzed and interpreted data, and wrote the manuscript; P.A. and F.M.H. established validated assay formats, and analyzed and interpreted data; M.d.l.R. designed and interpreted data from the tissue cross-reactivity study; A.B. performed statistical modeling of antibody titers; T.P. performed experiments and interpreted data; J.S. generated PEGylated proteins, designed and interpreted data from the prevalence study; J.O. provided patient samples and interpreted data; F.S. interpreted data; B.M.R. designed research, analyzed and interpreted data, and wrote the manuscript.

Conflict-of-interest disclosure: C. L., M.d.l.R., A.B., T.P., F.M.H., J.S., H.P.S., F.S. and B.M.R. are employees of Baxalta Innovations GmbH. P.A. was an employee of Baxter Innovation GmbH in the course of this study and is now employed by IMC FH Krems, University for Applied Sciences, Krems, Austria.

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Correspondence to Birgit Maria Reipert.

Additional information

This study was supported by Baxalta Innovations GmbH.

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Lubich, C., Allacher, P., de la Rosa, M. et al. The Mystery of Antibodies Against Polyethylene Glycol (PEG) - What do we Know?. Pharm Res 33, 2239–2249 (2016). https://doi.org/10.1007/s11095-016-1961-x

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  • DOI: https://doi.org/10.1007/s11095-016-1961-x

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