Evidence map›Paper›PMID 19309290›Full record

ArticleHuman gene therapy2009

Improved induction of immune tolerance to factor IX by hepatic AAV-8 gene transfer.

Mario Cooper, Sushrusha Nayak, Brad E Hoffman, Cox Terhorst, Ou Cao, Roland W Herzog

Open access · greenAbstract read
In one paragraph

Article in Human gene therapy, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 63 papers.

0numbers the graph read from it
0cells of the map it votes in
63citing papers in PubMed
5.9field-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

63 citing papers in PubMed, 88 citations in OpenAlex.

  1. Article
  2. Review
  3. Review
  4. 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
  5. Article
  6. Article
  7. Review
  8. Article
  9. Single-dose AAV vector gene immunotherapy to treat food allergy.Molecular therapy. Methods & clinical development · 2022
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Immune Response Mechanisms against AAV Vectors in Animal Models.Molecular therapy. Methods & clinical development · 2020
    Review
  18. Review
  19. Muscle-Directed Delivery of an AAV1 Vector Leads to Capsid-Specific T Cell Exhaustion in Nonhuman Primates and Humans.Molecular therapy : the journal of the American Society of Gene Therapy · 2020
    Article
  20. Review

3 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

6 authors at 2 institutions in 1 country.

Mario CooperDivision of Cellular and Molecular Therapy, Department of Pediatrics, University of Florida, Gainesville, FL 32610, USA.
Sushrusha Nayak
Brad E Hoffman
Cox Terhorst
Ou Cao
Roland W Herzog
University of Florida · USBeth Israel Deaconess Medical Center · US

Funding

Vector CoreP01HL078810 · NHLBI · WISTAR INSTITUTE · PI ERTL, HILDEGUND C. J. · 2005 to 2014
$16.7M
Immunology of Factor IX Gene Transfer to LiverR01AI051390 · NIAID · UNIVERSITY OF FLORIDA · PI HERZOG, ROLAND W. · 2002 to 2022
$6.7M
Training Program in Regenerative MedicineT32DK074367 · NIDDK · UNIVERSITY OF FLORIDA · PI SCOTT, EDWARD W · 2007 to 2022
$2.9M
NHLBI NIH HHS P01 HL078810NIAID NIH HHS R01 AI051390NIAID NIH HHS R01 AI/HL51390NIDDK NIH HHS T32DK074367
6 · The paper itself

Abstract

Gene therapy for hemophilia B has been shown to result in long-term expression and immune tolerance to factor IX (F.IX) after in vivo transduction of hepatocytes with adeno-associated viral (AAV-2) vectors in experimental animals. An optimized protocol was effective in several strains of mice with a factor 9 gene deletion (F9(-/-)). However, immune responses against F.IX were repeatedly observed in C3H/HeJ F9(-/-) mice. We sought to establish a gene transfer protocol that results in sustained expression without a requirement for additional manipulation of the immune system. Compared with AAV-2, AAV-8 was more efficient in transgene expression and induction of tolerance to F.IX in three different strains of wild-type mice. At equal vector doses, AAV-8 induced transgene product-specific regulatory CD4(+)CD25(+)FoxP3(+) T cells at significantly higher frequency. Moreover, sustained correction of hemophilia B in C3H/HeJ F9(-/-) mice without antibody formation was documented in all animals treated with > or =4 x 10(11) vector genomes (VG)/kg and in 80% of mice treated with 8 x 10(10) VG/kg. Therefore, it is possible to develop a gene transfer protocol that reliably induces tolerance to F.IX largely independent of genetic factors. A comparison with other studies suggests that additional parameters besides plateau levels of F.IX expression contributed to the improved success rate of tolerance induction.

Indexed as

Genetic TherapyGene Transfer TechniquesAnimalsAntibody FormationDependovirusFactor IXGenetic VectorsHemophilia BHumansImmune ToleranceImmunoglobulin GLiverMiceTime FactorsT-Lymphocytes, RegulatoryTransgenesFactor IXImmunoglobulin G

Identifiers

PMID19309290
PMCPMC2829279
OpenAlexW2012445121

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.