Evidence map›Paper›PMID 35808824›Full record

ArticleMolecular therapy : the journal of the American Society of Gene Therapy2022

A truncated reverse transcriptase enhances prime editing by split AAV vectors.

Zongliang Gao, Sujan Ravendran, Nanna S Mikkelsen, Jakob Haldrup, Huiqiang Cai, Xiangning Ding, Søren R Paludan, Martin K Thomsen, Jacob Giehm Mikkelsen, Rasmus O Bak

Open access · bronzeAbstract read
In one paragraph

Article in Molecular therapy : the journal of the American Society of Gene Therapy, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed
7.7field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

61 citing papers in PubMed, 92 citations in OpenAlex.

  1. Overview of Delivery Methods for Gene Editing.Methods in molecular biology (Clifton, N.J.) · 2027
    Review
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  8. A primer on prime: A prime editing update from advances to first-in-human trial.Molecular therapy : the journal of the American Society of Gene Therapy · 2026
    Review
  9. Review
  10. Article
  11. Article
  12. Review
  13. Article
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  15. Engineering chimeric PCSK9 for a vaccine against atherosclerosis.Molecular therapy. Methods & clinical development · 2025
    Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article

1 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 1 institution in 1 country.

Zongliang GaoDepartment of Biomedicine, Aarhus University, Aarhus C, Denmark.
Sujan RavendranDepartment of Biomedicine, Aarhus University, Aarhus C, Denmark.
Nanna S MikkelsenDepartment of Biomedicine, Aarhus University, Aarhus C, Denmark.
Jakob HaldrupDepartment of Biomedicine, Aarhus University, Aarhus C, Denmark.
Huiqiang CaiDepartment of Clinical Medicine, Aarhus University, Aarhus C, Denmark.
Xiangning DingDepartment of Biomedicine, Aarhus University, Aarhus C, Denmark.
Søren R PaludanDepartment of Biomedicine, Aarhus University, Aarhus C, Denmark.
Martin K ThomsenDepartment of Biomedicine, Aarhus University, Aarhus C, Denmark.
Jacob Giehm MikkelsenDepartment of Biomedicine, Aarhus University, Aarhus C, Denmark.
Rasmus O BakDepartment of Biomedicine, Aarhus University, Aarhus C, Denmark; Aarhus Institute of Advanced Studies, Aarhus University, Aarhus C, Denmark. Electronic address: bak@biomed.au.dk.
Aarhus University · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Prime editing is a new CRISPR-based, genome-editing technology that relies on the prime editor (PE), a fusion protein of Cas9-nickase and M-MLV reverse transcriptase (RT), and a prime editing guide RNA (pegRNA) that serves both to target PE to the desired genomic locus and to carry the edit to be introduced. Here, we make advancements to the RT moiety to improve prime editing efficiencies and truncations to mitigate issues with adeno-associated virus (AAV) viral vector size limitations, which currently do not support efficient delivery of the large prime editing components. These efforts include RT variant screening, codon optimization, and PE truncation by removal of the RNase H domain and further trimming. This led to a codon-optimized and size-minimized PE that has an expression advantage (1.4-fold) and size advantage (621 bp shorter). In addition, we optimize the split intein PE system and identify Rma-based Cas9 split sites (573-574 and 673-674) that combined with the truncated PE delivered by dual AAVs result in superior AAV titer and prime editing efficiency. We also show that this minimized PE gives rise to superior lentiviral vector titers (46-fold) over the regular PE in an all-in-one PE lentiviral vector. We finally deliver the minimized PE to mouse liver by dual AAV8 vectors and show up to 6% precise editing of the PCSK9 gene, thereby demonstrating the value of this truncated split PE system for in vivo applications.

Indexed as

CRISPR-Cas SystemsProprotein Convertase 9AnimalsDependovirusGene EditingGenetic VectorsMiceRNA-Directed DNA PolymeraseRNA, Guide, CRISPR-Cas SystemsPCSK9 protein, humanProprotein Convertase 9RNA-Directed DNA PolymeraseRNA, Guide, CRISPR-Cas SystemsAAV vectorsCRISPR-Cas9gene editinggene therapyin vivo deliveryPASTEprime editingreverse transcriptase

Identifiers

PMID35808824
PMCPMC9481986
OpenAlexW4284881260

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.