Evidence map›Paper›PMID 21697954›Full record

ArticleGene therapy2012

Neutralizing antibodies against adeno-associated virus examined prospectively in pediatric patients with hemophilia.

C Li, N Narkbunnam, R J Samulski, A Asokan, G Hu, L J Jacobson, M J Manco-Johnson, P E Monahan, Joint Outcome Study Investigators

Abstract read
PubMed Publisher
In one paragraph

Article in Gene therapy, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 150 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
150citing papers in PubMed, 1 pooled it
5.6field-weighted citation impact, top 4% 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

150 citing papers in PubMed, 1 synthesis or guideline pooled it, 218 citations in OpenAlex.

  1. A systematic review of immunosuppressive protocols used in AAV gene therapy for monogenic disorders.Molecular therapy : the journal of the American Society of Gene Therapy · 2024
    Pooled it
  2. Review
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. AAV for ovarian cancer gene therapy.Cancer gene therapy · 2025
    Review
  11. Use of CD19-targeted immune modulation to eradicate AAV-neutralizing antibodies.Molecular therapy : the journal of the American Society of Gene Therapy · 2025
    Article
  12. Review
  13. Gene therapy for hemophilia - From basic science to first approvals of "one-and-done" therapies.Molecular therapy : the journal of the American Society of Gene Therapy · 2025
    Review
  14. The curious case of AAV immunology.Molecular therapy : the journal of the American Society of Gene Therapy · 2025
    Review
  15. Article
  16. Review
  17. Review
  18. High rate of seroeligibility amongFrontiers in medicine · 2025
    Article
  19. Article
  20. Review

90 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

9 authors at 3 institutions in 2 countries.

C LiGene Therapy Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
N Narkbunnam
R J Samulski
A Asokan
G Hu
L J Jacobson
M J Manco-Johnson
P E Monahan
Joint Outcome Study Investigators
University of Colorado Denver · USMahidol University · THUniversity of North Carolina at Chapel Hill · US

Funding

Training & EducationU54AR056953 · NIAMS · UNIV OF NORTH CAROLINA CHAPEL HILL · PI XIAO, XIAO · 2008 to 2012
$7.1M
Rational and Combinatorial Engineering of AAV VectorsR01AI072176 · NIAID · UNIV OF NORTH CAROLINA CHAPEL HILL · PI HIRSCH, MATTHEW LOUIS, SAMULSKI, RICHARD J · 2008 to 2017
$3.7M
AAV Gene Therapy for AAT DeficiencyR01DK084033 · NIDDK · UNIV OF NORTH CAROLINA CHAPEL HILL · PI LI, CHENGWEN · 2009 to 2016
$2.2M
CTL response to AAV VectorR01AI080726 · NIAID · UNIV OF NORTH CAROLINA CHAPEL HILL · PI LI, CHENGWEN, SAMULSKI, RICHARD J · 2010 to 2014
$1.8M
NIAID NIH HHS 1R01AI080726NIAID NIH HHS 5R01AI072176NIAMS NIH HHS 5U54AR056953NIDDK NIH HHS 5R01DK084033PHS HHS R00069PHS HHS U27/CCU812106
6 · The paper itself

Abstract

Recombinant adeno-associated virus (rAAV) is a promising gene delivery vector and has recently been used in patients with hemophilia. One limitation of AAV application is that most humans have experienced wild-type AAV serotype 2 exposure, which frequently generates neutralizing antibodies (NAbs) that may inhibit rAAV2 vector transduction. Employing alternative serotypes of rAAV vectors may circumvent this problem. We investigated the development of NAbs in early childhood by examining sera gathered prospectively from 62 children with hemophilia A, participating in a multi-institutional hemophilia clinical trial (the Joint Outcome Study). Clinical applications in hemophilia therapy have been suggested for serotypes AAV2, AAV5 and AAV8, therefore NAbs against these serotypes were serially assayed over a median follow-up of 4 years. NAbs prevalence increased during early childhood for all serotypes. NAbs against AAV2 (43.5%) were observed more frequently and at higher titers compared with both AAV5 (25.8%) and AAV8 (22.6%). NAbs against AAV5 or AAV8 were rarely observed in the absence of co-prevalent and higher titer AAV2 NAbs, suggesting that NAbs to AAV5 and AAV8 were detected following AAV2 exposure due to partial cross-reactivity of AAV2-directed NAbs. The results may guide rational design of clinical trials using alternative AAV serotypes and suggest that younger patients who are given AAV gene therapy will benefit from the lower prevalence of NAbs.

Indexed as

Antibodies, NeutralizingAntibodies, ViralCell LineChildDependovirusFollow-Up StudiesGenetic VectorsHemophilia AHumansMaleParvoviridae InfectionsSeroepidemiologic StudiesAntibodies, NeutralizingAntibodies, Viral

Identifiers

PMID21697954
OpenAlexW2057767029

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.