Cited by 151Advanced biosensing and bioanalysis techniquesDNA and Nucleic Acid ChemistryRNA Interference and Gene Delivery

Chemically Modified DNA Aptamers Bind Interleukin-6 with High Affinity and Inhibit Signaling by Blocking Its Interaction with Interleukin-6 Receptor

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Gupta, Shashi, Hirota, Masao, Waugh, Sheela M., Murakami, Ikuo, Suzuki, Tomoki, Muraguchi, Masahiro, Shibamori, Masafumi, Ishikawa, Yuichi +7 more·2014·Journal of Biological Chemistry

Abstract

Interleukin-6 (IL-6) is a pleiotropic cytokine that regulates immune and inflammatory responses, and its overproduction is a hallmark of inflammatory diseases. Inhibition of IL-6 signaling with the anti-IL-6 receptor antibody tocilizumab has provided some clinical benefit to patients; however, direct cytokine inhibition may be a more effective option. We used the systematic evolution of ligands by exponential enrichment (SELEX) process to discover slow off-rate modified aptamers (SOMAmers) with hydrophobic base modifications that inhibit IL-6 signaling in vitro. Two classes of IL-6 SOMAmers were isolated from modified DNA libraries containing 40 random positions and either 5-(N-benzylcarboxamide)-2'-deoxyuridine (Bn-dU) or 5-[N-(1-naphthylmethyl)carboxamide]-2'-deoxyuridine (Nap-dU) replacing dT. These modifications facilitate the high affinity binding interaction with IL-6 and provide resistance against degradation by serum endonucleases. Post-SELEX optimization of one Bn-dU and one Nap-dU SOMAmer led to improvements in IL-6 binding (10-fold) and inhibition activity (greater than 20-fold), resulting in lead SOMAmers with sub-nanomolar affinity (Kd = 0.2 nm) and potency (IC50 = 0.2 nm). Although similar in inhibition properties, the two SOMAmers have unique sequences and different ortholog specificities. Furthermore, these SOMAmers were stable in human serum in vitro for more than 48 h. Both SOMAmers prevented IL-6 signaling by blocking the interaction of IL-6 with its receptor and inhibited the proliferation of tumor cells in vitro as effectively as tocilizumab. This new class of IL-6 inhibitor may be an effective therapeutic alternative for patients suffering from inflammatory diseases.

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  • This scalable and reproducible top-down nanoproteomics approach can be generally applied to other low-abundance plasma/serum proteins of interest, such as cytokines or growth factors, if the NPs can be functionalized with a suitable affinity reagent.

    “Beyond cTnI, we expect that this scalable and reproducible top-down nanoproteomics approach can be generally applied to other low-abundance plasma/serum proteins of interest, such as cytokines or growth factors, if the NPs can be functionalized with a suitable affinity reagent55,56.”

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Authors
Gupta, S., Hirota, M., Waugh, S. M., Murakami, I., Suzuki, T., Muraguchi, M., Shibamori, M., Ishikawa, Y., Jarvis, T. C., Carter, J. D., Zhang, C., Gawande, B., Vrkljan, M., Janjic, N., & Schneider, D. J.
Affiliations
SomaLogic (United States) (US)
Corresponding author
Schneider, Daniel J.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2014-03
Volume
289
Issue
12
Pages
8706-8719
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2084203294
Cited by
151
References
52
Citations by year
2026: 3 · 2025: 13 · 2024: 7 · 2023: 10 · 2022: 16 · 2021: 9 · 2020: 13 · 2019: 17 · 2018: 14 · 2017: 13 · 2016: 14 · 2015: 16 · 2014: 6
FWCI
6.69
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Advanced biosensing and bioanalysis techniques
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
Keywords
interleukin-6, SOMAmer, IL-6 receptor, cytokine signaling inhibition, SELEX, serum stability, tumor cell proliferation, inflammatory diseases
MeSH terms
Interleukin-6 Inhibitors, Amino Acid Sequence, Animals, Anti-Inflammatory Agents, Base Sequence, Cricetulus, Humans, Macaca fascicularis, Molecular Sequence Data, Interleukin-6, CHO Cells, Receptors, Interleukin-6, Serum, Mice, Rats, SELEX Aptamer Technique, Aptamers, Nucleotide, Drug Discovery

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