Cited by 95RNA Interference and Gene DeliveryNanoparticle-Based Drug DeliveryAdvanced Drug Delivery Systems

Protamine-Based Strategies for RNA Transfection

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Jarzebska, Natalia Teresa, Mellett, Mark, Frei, Julia, Kündig, Thomas M., Pascolo, Steve·2021·Pharmaceutics

Published version of a preprint

Abstract

Protamine is a natural cationic peptide mixture mostly known as a drug for the neutralization of heparin and as a compound in formulations of slow-release insulin. Protamine is also used for cellular delivery of nucleic acids due to opposite charge-driven coupling. This year marks 60 years since the first use of Protamine as a transfection enhancement agent. Since then, Protamine has been broadly used as a stabilization agent for RNA delivery. It has also been involved in several compositions for RNA-based vaccinations in clinical development. Protamine stabilization of RNA shows double functionality: it not only protects RNA from degradation within biological systems, but also enhances penetration into cells. A Protamine-based RNA delivery system is a flexible and versatile platform that can be adjusted according to therapeutic goals: fused with targeting antibodies for precise delivery, digested into a cell penetrating peptide for better transfection efficiency or not-covalently mixed with functional polymers. This manuscript gives an overview of the strategies employed in protamine-based RNA delivery, including the optimization of the nucleic acid’s stability and translational efficiency, as well as the regulation of its immunostimulatory properties from early studies to recent developments.

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Crossref · 10.3390/pharmaceutics13060877

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  • Specific immune responses against at least one antigen were detected in 63% of patients after treatment, and the frequency of activated IgD+ CD38hi B cells increased by more than two-fold in 60% of evaluated patients.

    “Specific immune responses against at least one antigen were detected in 63% of patients after treatment, and the frequency of activated IgD+ CD38hi B cells increased by more than two-fold in 60% of evaluated patients.343,353,354”

    From Advances in COVID-19 mRNA vaccine development (2022) · cites this paper as [354]

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Authors
Jarzebska, N. T., Mellett, M., Frei, J., Kündig, T. M., & Pascolo, S.
Affiliations
  • Department of Dermatology, University Hospital Zürich (USZ), University of Zürich (UZH), Raemistrasse 100, 8091 Zürich, Switzerland
  • University of Zurich (CH)
Corresponding author
Pascolo, Steve
Venue
Pharmaceutics
Publisher
MDPI AG
Published
2021-06-14
Volume
13
Issue
6
Pages
877
ISSN
1999-4923 (ISSN-L)
OpenAlex
W3167965536
Cited by
95
References
75
Citations by year
2026: 13 · 2025: 26 · 2024: 17 · 2023: 23 · 2022: 11 · 2021: 5
FWCI
1.47
Type
journal article
Language
en
Open access
Locations
  • Pharmaceutics (publishedVersion, cc-by)
  • Preprints.org (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion, cc-by)
  • Zurich Open Repository and Archive (University of Zurich)
Funders
  • Universität Zürich
  • Foundation for Research in Science and the Humanities
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Advanced Drug Delivery Systems
Keywords
protamine, RNA transfection, RNA delivery, RNA stabilization, RNA vaccines, cationic peptides, cell-penetrating peptides, immunostimulatory properties, nucleic acid stability, heparin neutralization

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