Cited by 4RNA Interference and Gene DeliveryBiosimilars and Bioanalytical MethodsMonoclonal and Polyclonal Antibodies Research

Cross-Reactive Polyclonal Antibodies Raised Against GalNAc-Conjugated siRNA Recognize Mostly the GalNAc Moiety

Ballman, Kimberly K., Peek, Victoria L., Sloan, John H., Li, Jingling, Konrad, Robert J., Wen, Yi·2024·The AAPS Journal

Abstract

Small interfering RNA (siRNA) is gaining momentum as a therapeutic modality with six approved products. Since siRNA has the potential to elicit undesired immune responses in patients, immunogenicity assessment is required during clinical development by regulatory authorities. In this study, anti-siRNA polyclonal antibodies were generated through animal immunization. These cross-reactive polyclonal antibodies recognized mostly the N-acetylgalactosamine (GalNAc) moiety with a small fraction against sequence-independent epitopes. We demonstrate that the polyclonal antibodies can be utilized as immunogenicity assay positive controls for the same class of GalNAc-conjugated siRNAs. In addition, anti-GalNAc mAbs showed desired sensitivity and drug tolerance, supporting their use as alternative surrogate positive controls. These findings can guide positive control selection and immunogenicity assay development for GalNAc-conjugated siRNAs and other oligonucleotide therapeutics.

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Crossref · 10.1208/s12248-024-00914-w

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25 of 25 references verified0 citation errors · 0 not checkable

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Authors
Ballman, K. K., Peek, V. L., Sloan, J. H., Li, J., Konrad, R. J., & Wen, Y.
Affiliations
Eli Lilly (United States) (US)
Corresponding author
Wen, Yi
Venue
The AAPS Journal
Published
2024-04-03
Volume
26
Issue
3
Pages
41-41
ISSN
1550-7416 (ISSN-L)
OpenAlex
W4393859273
Cited by
4
References
25
Citations by year
2026: 3 · 2025: 1
FWCI
0.55
Type
journal article
Language
en
Open access
closed
Locations
  • The AAPS Journal (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
  • Life Sciences › Immunology and Microbiology › Immunology › Biosimilars and Bioanalytical Methods
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
Keywords
GalNAc-conjugated siRNA, N-acetylgalactosamine, immunogenicity assessment, positive control, monoclonal antibodies, oligonucleotide therapeutics, siRNA therapeutics, cross-reactivity
MeSH terms
Acetylgalactosamine, Animals, Antibodies, Monoclonal, Humans, Oligonucleotides, RNA, Small Interfering

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