Cited by 2,474RNA Interference and Gene DeliveryRNA and protein synthesis mechanismsImmunotherapy and Immune Responses

mRNA-based therapeutics--developing a new class of drugs

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Sahin, Ugur, Karikó, Katalin, Türeci, Özlem·2014·Nature Reviews Drug Discovery

Abstract

In vitro transcribed (IVT) mRNA has recently come into focus as a potential new drug class to deliver genetic information. Such synthetic mRNA can be engineered to transiently express proteins by structurally resembling natural mRNA. Advances in addressing the inherent challenges of this drug class, particularly related to controlling the translational efficacy and immunogenicity of the IVTmRNA, provide the basis for a broad range of potential applications. mRNA-based cancer immunotherapies and infectious disease vaccines have entered clinical development. Meanwhile, emerging novel approaches include in vivo delivery of IVT mRNA to replace or supplement proteins, IVT mRNA-based generation of pluripotent stem cells and genome engineering using IVT mRNA-encoded designer nucleases. This Review provides a comprehensive overview of the current state of mRNA-based drug technologies and their applications, and discusses the key challenges and opportunities in developing these into a new class of drugs.

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  • mRNA vaccines still suffer from decreased efficacy due to poor RNA stability in solution and in vivo and to limited expression of the payload mRNA.

    “mRNA vaccines still suffer from decreased efficacy due to poor RNA stability in solution and in vivo and to limited expression of the payload mRNA; these are all pivotal issues that need to be carefully optimized for preclinical and clinical applications3–6.”

    From Combinatorial optimization of mRNA structure, stability, and translation for RNA-based therapeutics (2022) · cites this paper as [3]

    The sections on improving mRNA delivery and on translation and stability describe extracellular degradation, intracellular stability, and achieving sufficient expression of the encoded protein as challenges. But Box 4 says RNA is stable in RNase-free environments, while the Conclusions say mRNA instability has been efficiently addressed. The paper therefore does not support a blanket claim that poor stability in solution and in vivo still reduces vaccine efficacy. (LLM, conf=0.88)

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  • ψ and m1ψ substitutions for U have been widely adopted for mRNA therapeutics and vaccines due to improved in-cell translation and better control of innate immune responses.

    “In particular, we focused on ψ and m1ψ, since these substitutions for U have been widely adopted for mRNA therapeutics and vaccines due to improved in-cell translation and to better control of innate immune responses2,3,8,67 through avoidance of recognition by cellular toll-like receptors (TLR7 and TLR8)68, RIG‑I, and PKR69–71.”

    From Combinatorial optimization of mRNA structure, stability, and translation for RNA-based therapeutics (2022) · cites this paper as [3]

    Box 1 reports that pseudouridine-modified mRNA can improve translation and reduce innate immune activation, including activation of TLR7 and TLR8. It does not identify m1ψ or establish that both substitutions were widely adopted for mRNA therapeutics and vaccines. No page number is available in our copy. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • The immunogenicity of mRNA is the most challenging obstacle it faces.

    “IVT is a low-cost method of mRNA synthesis; however the immunogenicity of mRNA is the most challenging obstacle it faces (Sahin et al. 2014).”

    From Modifications of mRNA vaccine structural elements for improving mRNA stability and translation efficiency (2022) · cites this paper as Sahin et al. 2014

    The “Immune-stimulatory activity of IVT mRNA” section calls innate immune activation a major disadvantage for protein-replacement therapies, but an added benefit for vaccination. It does not identify immunogenicity as the most challenging obstacle for mRNA generally; the “Progress in improving mRNA delivery” section also describes substantial delivery challenges. Page numbers are unavailable in our copy. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • α- and β-globin 3′ UTRs contain sequence features that enhance the translation and stability of mRNA.

    “The 3ʹ-UTRs of α- and β-globin mRNAs are found in many in vitro-transcribed (IVT) mRNA, and they contain sequence features that enhance the translation and stability of mRNA (Sahin et al. 2014; Karikó et al. 1999).”
  • The basic structure of mRNA is made up of a protein-encoding ORF, surrounded by 5′ and 3′ UTRs, a 7-methyl guanosine 5′ cap structure, and a 3′ poly(A) tail.

    “The basic structure of mRNA, same as eukaryotic mRNA, is made up of (i) protein encoding ORF, surrounded by (ii) 5′ and 3′ UTRs, and (iii) a 7-methyl guanosine 5′ cap structure and (iv) a 3′poly(A) tail at the end sides (Verbeke et al. 2019; Schlake et al. 2012; Sahin et al. 2014) (Fig. 1).”

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Authors
Sahin, U., Karikó, K., & Türeci, Ö.
Affiliations
  • BioNTech (Germany) (DE)
  • Johannes Gutenberg University Mainz (DE)
Corresponding author
  • Karikó, Katalin
  • Türeci, Özlem
Venue
Nature Reviews Drug Discovery
Published
2014-09-19
Volume
13
Issue
10
Pages
759-780
ISSN
  • 1474-1776 (ISSN-L)
  • 1474-1784
OpenAlex
W1963706689
Cited by
2,474
References
256
Citations by year
2026: 296 · 2025: 348 · 2024: 341 · 2023: 312 · 2022: 339 · 2021: 289 · 2020: 143 · 2019: 115 · 2018: 98 · 2017: 81 · 2016: 77 · 2015: 32 · 2014: 2
FWCI
6.03
Type
journal article
Language
en
Open access
Locations
  • Nature Reviews Drug Discovery (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
in vitro transcribed mRNA, mRNA therapeutics, mRNA vaccines, cancer immunotherapy, protein replacement therapy, genome editing, designer nucleases, immunogenicity, biopharmaceutical development
MeSH terms
Animals, Humans, Immunotherapy, Proteins, RNA, Messenger, Drug Design, Drug Delivery Systems, Pluripotent Stem Cells

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