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A therapeutic antisense oligonucleotide encompassing 2′-O-methoxyethyl modification triggers unique perturbation of the transcriptome

GSE307431 Homo sapiens (human) RNA-seq (gene expression) 20 samples Submitted 2026/01/06 Platform GPL24676
At a glance

RNA-seq (gene expression) · human · 20 samples

What it is
RNA-seq (gene expression)Gene activity measured by sequencing. The summary does not mention single-cell work, so this is most likely bulk: one average per sample, the usual starting point for comparing groups.
Organism
Homo sapiens (human)
Samples
20 samples
Data you can get
A processed table (series matrix) and supplementary files from NCBI; the raw sequencing reads from ENA. Which of these hold counts depends on the study, so check the file list.
Paper
A therapeutic antisense oligonucleotide encompassing 2'-O-methoxyethyl modification triggers unique perturbation of the transcriptomeNAR molecular medicine · 2026
Summary (written by the submitters)
Antisense oligonucleotides (ASOs) are short nucleic acids that act by annealing to complementary target RNA or DNA sequences. It is currently unknown how the transcriptome-wide off-target effects of different ASO chemistries targeting the same sequence differ. Nusinersen, the first FDA-approved treatment for spinal muscular atrophy (SMA), is an ASO that restores Survival motor neuron 2 (SMN2) exon 7 splicing by binding to the intronic splicing silencer N1 (ISS-N1) element in intron 7.
Read the full summary ↓
We tested the transcriptome-wide off-target effects in SMA patient fibroblasts of three ASOs targeting ISS-N1: F18OMe, a 2'-O-methyl (OMe) ASO incorporating a phosphorothioate backbone, F18MOE, a 2'-O-methoxyethyl (MOE) ASO incorporating a phosphorothioate backbone, and F20PMO, a phosphorodiamidate morpholino (PMO) ASO. Using minigenes, we showed that skipping of POLR2H exon 2 and seven other exons is triggered by direct annealing of F18MOE to target exonic sequences, and the chemistry-specific effects of F18MOE on exon skipping are primarily due to enhanced mismatch tolerance of MOE. We confirmed that reduction of ASO length and mixed MOE/OMe chemistry are both effective strategies for mitigation of off-target effects. Our findings will be instructive for future design of ASO therapies for SMA as well as other diseases treatable by ASOs.
Published in
A therapeutic antisense oligonucleotide encompassing 2'-O-methoxyethyl modification triggers unique perturbation of the transcriptome
Ottesen EW, Murzyn WA, Kaas RL et al. · NAR molecular medicine 2026 · PMID 41551726 · doi:10.1093/narmme/ugag002
This dataset
Download · which file do I need?

Direct links to NCBI and ENA, no account and no request form. Pick by what you want to do: take the small processed table to look, the supplementary files to re-analyse, or the original raw data to start over.

1 · Just have a look

Processed table

The series matrix: one table of values per sample as the submitters processed it. The smallest download, and it opens in Excel or R. Start here to see what the data look like.

2 · Re-analyse it

Supplementary files

The count tables and other files the authors uploaded. Take only the samples you need, or the whole study as GSE307431_RAW.tar (it can run to tens of gigabytes).

3 · Start from the raw reads

Raw sequencing reads

The original FASTQ files, straight from the sequencer, held at ENA. Large, and you align them yourself, so only choose this if you need to re-process the study from scratch.

What the files usually look like: For RNA-seq the counts are usually a table among the supplementary files (look for 'counts', 'expression', 'FPKM' or 'TPM' in the file name). The series matrix of a sequencing study is sometimes nearly empty.

Also filed as BioProject PRJNA1321660 and SRA study SRP618280. Searching any of these in the dataset finder brings you back here.

Samples in this study

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