Cited by 52Platelet Disorders and TreatmentsDNA and Nucleic Acid ChemistryHeparin-Induced Thrombocytopenia and Thrombosis

Assessing single-stranded oligonucleotide drug-induced effects in vitro reveals key risk factors for thrombocytopenia

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Sewing, Sabine, Roth, Adrian B., Winter, Michael, Dieckmann, Andreas, Bertinetti-Lapatki, Cristina, Tessier, Yann, McGinnis, Claudia, Huber, Sylwia +5 more·2017·PLOS ONE

Abstract

Single-stranded oligonucleotides (ON) comprise a promising therapeutic platform that enables selective modulation of currently undruggable targets. The development of novel ON drug candidates has demonstrated excellent efficacy, but in certain cases also some safety liabilities were reported. Among them are events of thrombocytopenia, which have recently been evident in late stage trials with ON drugs. The underlying mechanisms are poorly understood and the risk for ON candidates causing such events cannot be sufficiently assessed pre-clinically. We investigated potential thrombocytopenia risk factors of ONs and implemented a set of in vitro assays to assess these risks. Our findings support previous observations that phosphorothioate (PS)-ONs can bind to platelet proteins such as platelet collagen receptor glycoprotein VI (GPVI) and activate human platelets in vitro to various extents. We also show that these PS-ONs can bind to platelet factor 4 (PF4). Binding to platelet proteins and subsequent activation correlates with ON length and connected to this, the number of PS in the backbone of the molecule. Moreover, we demonstrate that locked nucleic acid (LNA) ribosyl modifications in the wings of the PS-ONs strongly suppress binding to GPVI and PF4, paralleled by markedly reduced platelet activation. In addition, we provide evidence that PS-ONs do not directly affect hematopoietic cell differentiation in culture but at higher concentrations show a pro-inflammatory potential, which might contribute to platelet activation. Overall, our data confirm that certain molecular attributes of ONs are associated with a higher risk for thrombocytopenia. We propose that applying the in vitro assays discussed here during the lead optimization phase may aid in deprioritizing ONs with a potential to induce thrombocytopenia.

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Crossref · 10.1371/journal.pone.0187574

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  • The most advanced CNS-active ASO scaffold utilizes a mixed backbone configuration with at least 70-80% PS content, maintaining efficacy and distribution with minimal risk of toxic phenotypes.

    “The most advanced CNS-active ASO scaffold utilizes a mixed backbone configuration with at least 70–80% PS content. This modification maintains efficacy and distribution with minimal risk of toxic phenotypes 13, 14 via mechanisms that are not fully understood15.”

    From A divalent siRNA chemical scaffold for potent and sustained modulation of gene expression throughout the central nervous system (2019) · cites this paper as [14]

    The Discussion (page not provided) reports that reducing PS content may reduce platelet activation and thrombocytopenia risk, and that LNA modifications improve binding to RNA targets. But the Methods describe the tested oligonucleotides as fully phosphorothioated; the paper does not establish a CNS-active mixed-backbone scaffold with 70–80% PS content or show maintained efficacy and distribution. (LLM, conf=0.88)

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  • Thrombocytopenia (low platelet count) has been reported as a PS-mediated rare adverse event.

    “In addition, we found no measurable changes in blood chemistry or cell counts (Supplementary Fig. 20), which is particularly important because thrombocytopenia (low platelet count) has been reported as a PS-mediated rare adverse event13, 14.”

    From A divalent siRNA chemical scaffold for potent and sustained modulation of gene expression throughout the central nervous system (2019) · cites this paper as [14]

    The Introduction (page unavailable) reports rare platelet-count reductions and cases of severe thrombocytopenia in trials of phosphorothioate oligonucleotides. But the Discussion (page unavailable) says the clinical mechanism remains unknown and may be multifactorial, so the paper does not establish that PS itself mediated those events. (LLM, conf=0.86)

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Authors
Sewing, S., Roth, A. B., Winter, M., Dieckmann, A., Bertinetti-Lapatki, C., Tessier, Y., McGinnis, C., Huber, S., Koller, E., Ploix, C., Reed, J. C., Singer, T., & Rothfuss, A.
Affiliations
  • F. Hoffmann-La Roche AG (CH)
  • Roche (Denmark) (DK)
Corresponding author
Sewing, Sabine
Venue
PLOS ONE
Published
2017-11-06
Volume
12
Issue
11
Pages
e0187574
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2767260707
Cited by
52
References
41
Citations by year
2026: 5 · 2025: 6 · 2024: 7 · 2023: 10 · 2022: 6 · 2021: 5 · 2020: 4 · 2019: 6 · 2018: 3
FWCI
2.74
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
F. Hoffmann-La Roche
Topics
  • Health Sciences › Medicine › Hematology › Platelet Disorders and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
  • Health Sciences › Medicine › Surgery › Heparin-Induced Thrombocytopenia and Thrombosis
Keywords
single-stranded oligonucleotides, thrombocytopenia, phosphorothioate oligonucleotides, platelet activation, glycoprotein VI, platelet factor 4, locked nucleic acid, pro-inflammatory effects, hematopoietic differentiation, oligonucleotide length, lead optimization
MeSH terms
Bone Marrow, Enzyme-Linked Immunosorbent Assay, Flow Cytometry, Humans, Oligonucleotides, Platelet Membrane Glycoproteins, Protein Binding, Risk Factors, Thrombocytopenia, Platelet Activation, Surface Plasmon Resonance

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