Evidence map›Paper›PMID 31752530›Full record

ArticleHuman gene therapy methods2019

Lot-to-Lot Variation in Adeno-Associated Virus Serotype 9 (AAV9) Preparations.

Deirdre M O'Connor, Corinne Lutomski, Martin F Jarrold, Nicholas M Boulis, Anthony Donsante

Open access · greenAbstract read
In one paragraph

Article in Human gene therapy methods, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
2.0field-weighted citation impact, top 13% 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, 21 citations in OpenAlex.

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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

5 authors at 2 institutions in 1 country.

Deirdre M O'ConnorDepartment of Neurosurgery, Emory University School of Medicine, Atlanta, Georgia.
Corinne LutomskiChemistry, Indiana University Bloomington, Bloomington, Indiana.
Martin F JarroldChemistry, Indiana University Bloomington, Bloomington, Indiana.
Nicholas M BoulisDepartment of Neurosurgery, Emory University School of Medicine, Atlanta, Georgia.
Anthony DonsanteDepartment of Neurosurgery, Emory University School of Medicine, Atlanta, Georgia.
Emory University · USIndiana University Bloomington · US

Funding

Intrathecal Gene Therapy Expressing IGF-1 for Amyotrophic Lateral SclerosisR21NS085553 · NINDS · EMORY UNIVERSITY · PI BOULIS, NICHOLAS M · 2013 to 2014
$388k
NINDS NIH HHS R21 NS085553
6 · The paper itself

Abstract

Viral vectors are complex drugs that pose a particular challenge for manufacturing. Previous studies have shown that, unlike small-molecule drugs, vector preparations do not yield a collection of identical particles. Instead, a mixture of particles that vary in capsid stoichiometry and impurities is created, which may differ from lot to lot. The consequences of this are unclear, but conflicting reports regarding the biological properties of vectors, including transduction patterns, suggest that this variability may have an effect. However, other variables, including differences in animal strains and techniques, make it difficult to identify a cause. Here, we report lot-to-lot variation in spinal cord gray matter transduction following intrathecal delivery of self-complementary adeno-associated virus serotype 9 vectors. Eleven lots of vector were evaluated from six vector cores, including one preclinical/Good Laboratory Practice lot. Eight of the lots, including the preclinical lot, failed to transduce the gray matter, whereas the other three provided robust transduction. The cause for this variation is unknown, but it did not correlate with vector titer, buffer, or purification method. These results highlight the need to identify the cause of this variation and to develop improved production and quality control methods to ensure lot-to-lot consistency of vector potency.

Indexed as

AnimalsDependovirusGenetic VectorsGray MatterHEK293 CellsHumansMass SpectrometryRatsSerogroupSwineTissue DistributionTransfectionAAV9intrathecallot-to-lot variationspinal cordtransduction

Identifiers

PMID31752530
PMCPMC6919242
OpenAlexW2989833586

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.