Evidence map›Paper›PMID 34580433›Full record

ArticleGene therapy2022

Injection pressure levels for creating blebs during subretinal gene therapy.

Brittni A Scruggs, Huber Martins Vasconcelos, Mariana Matioli da Palma, Katie Kogachi, Mark E Pennesi, Paul Yang, Steven T Bailey, Andreas K Lauer

Open access · greenAbstract read
In one paragraph

Article in Gene therapy, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
0.9field-weighted citation impact, top 27% 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 22 citations in OpenAlex.

  1. Pooled it
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  6. Article
  7. Surgical Approaches to Retinal Gene Therapy: 2025 Update.Bioengineering (Basel, Switzerland) · 2025
    Review
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  9. Article
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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

8 authors at 1 institution in 2 countries.

Brittni A ScruggsCasey Eye Institute, Department of Ophthalmology, Oregon Health & Science University, Portland, OR, USA.
Huber Martins VasconcelosCasey Eye Institute, Department of Ophthalmology, Oregon Health & Science University, Portland, OR, USA.ORCID http://orcid.org/0000-0001-5619-3188
Mariana Matioli da PalmaCasey Eye Institute, Department of Ophthalmology, Oregon Health & Science University, Portland, OR, USA.ORCID http://orcid.org/0000-0001-5770-279X
Katie KogachiCasey Eye Institute, Department of Ophthalmology, Oregon Health & Science University, Portland, OR, USA.
Mark E PennesiCasey Eye Institute, Department of Ophthalmology, Oregon Health & Science University, Portland, OR, USA.
Paul YangCasey Eye Institute, Department of Ophthalmology, Oregon Health & Science University, Portland, OR, USA.
Steven T BaileyCasey Eye Institute, Department of Ophthalmology, Oregon Health & Science University, Portland, OR, USA.
Andreas K LauerCasey Eye Institute, Department of Ophthalmology, Oregon Health & Science University, Portland, OR, USA. lauera@ohsu.edu.ORCID http://orcid.org/0000-0001-7582-9030
Oregon Health & Science University · US

Funding

Proteomics CoreP30EY010572 · NEI · OREGON HEALTH & SCIENCE UNIVERSITY · PI John Peter Campbell · 1995 to 2026
$19.4M
Neuroprotective Mechanisms of Inosine Monophosphate Dehydrogenase Inhibitors in Retinitis PigmentosaK08EY026650 · NEI · OREGON HEALTH & SCIENCE UNIVERSITY · PI YANG, PAUL · 2016 to 2020
$1.1M
NEI NIH HHS K08 EY026650NEI NIH HHS P30 EY010572
6 · The paper itself

Abstract

Retinal damage has been associated with increased injection pressure during subretinal gene therapy delivery in various animal models, yet there are no human clinical data regarding the pressures required to initiate and propagate subretinal blebs. This study characterized the intraoperative pressure levels for subretinal gene therapy delivery across eight retinal conditions. A total of 116 patients with retinal degenerative diseases have been treated with subretinal gene therapy at OHSU-Casey Eye Institute as of June 2020; seventy patients (60.3%) were treated using a pneumatic-assisted subretinal delivery system. All retinal blebs were performed using a 41-gauge injection cannula, and use of a balanced salt solution (BSS) "pre-bleb" prior to gene therapy delivery was performed at the discretion of the surgeon. Patient age and intraoperative data for BSS and vector injections were analyzed in a masked fashion for all patients who received pneumatic-assisted subretinal gene therapy. The median age of the patients was 35 years (range 4-70). No significant differences in injection pressures were found across the eight retinal conditions. In this study, patient age was shown to affect maximum injection pressures required for bleb propagation, and the relationship between age and pressure varied based on retinal condition. These data have important implications in optimizing surgical protocols for subretinal injections.

Indexed as

Retinal DegenerationAnimalsGenetic TherapyInjectionsRetina

Identifiers

PMID34580433
PMCPMC8958181
OpenAlexW3203516289

What OpenQuestion holds

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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.