Evidence map›Paper›PMID 19603001›Full record

ArticleMolecular therapy : the journal of the American Society of Gene Therapy2009

Impact of the underlying mutation and the route of vector administration on immune responses to factor IX in gene therapy for hemophilia B.

Ou Cao, Brad E Hoffman, Babak Moghimi, Sushrusha Nayak, Mario Cooper, Shangzhen Zhou, Hildegund C J Ertl, Katherine A High, Roland W Herzog

Abstract read
In one paragraph

Article in Molecular therapy : the journal of the American Society of Gene Therapy, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 78 papers.

0numbers the graph read from it
0cells of the map it votes in
78citing papers in PubMed
–field-weighted citation impact
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

78 citing papers in PubMed.

  1. Article
  2. Review
  3. The curious case of AAV immunology.Molecular therapy : the journal of the American Society of Gene Therapy · 2025
    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. TLR9-independent CD8Molecular therapy : the journal of the American Society of Gene Therapy · 2024
    Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Immunogenicity of Recombinant Adeno-Associated Virus (AAV) Vectors for Gene Transfer.BioDrugs : clinical immunotherapeutics, biopharmaceuticals and gene therapy · 2023
    Review
  12. Article
  13. Article
  14. Article
  15. Review
  16. Article
  17. CAR- and TRuC-redirected regulatory T cells differ in capacity to control adaptive immunity to FVIII.Molecular therapy : the journal of the American Society of Gene Therapy · 2021
    Article
  18. Review
  19. Review
  20. Article

18 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.

Ou CaoDepartment of Pediatrics, University of Florida, Gainesville, Florida 32610, USA.
Brad E Hoffman
Babak Moghimi
Sushrusha Nayak
Mario Cooper
Shangzhen Zhou
Hildegund C J Ertl
Katherine A High
Roland W Herzog

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
Howard Hughes Medical InstituteNHLBI NIH HHS P01 HL078810NIAID NIH HHS R01 AI051390NIAID NIH HHS R01 AI/HL51390NIDDK NIH HHS T32 DK074367NIDDK NIH HHS T32DK074367
6 · The paper itself

Abstract

Immune responses to factor IX (F.IX), a major concern in gene therapy for hemophilia, were analyzed for adeno-associated viral (AAV-2) gene transfer to skeletal muscle and liver as a function of the F9 underlying mutation. Vectors identical to those recently used in clinical trials were administered to four lines of hemophilia B mice on a defined genetic background [C3H/HeJ with deletion of endogenous F9 and transgenic for a range of nonfunctional human F.IX (hF.IX) variants]. The strength of the immune response to AAV-encoded F.IX inversely correlated with the degree of conservation of endogenous coding information and levels of endogenous antigen. Null mutation animals developed T- and B-cell responses in both protocols. However, inhibitor titers were considerably higher upon muscle gene transfer (or protein therapy). Transduced muscles of Null mice had strong infiltrates with CD8+ cells, which were much more limited in the liver and not seen for the other mutations. Sustained expression was achieved with liver transduction in mice with crm(-) nonsense and missense mutations, although they still formed antibodies upon muscle gene transfer. Therefore, endogenous expression prevented T-cell responses more effectively than antibody formation, and immune responses varied substantially depending on the protocol and the underlying mutation.

Indexed as

AdenoviridaeAnimalsCD8-Positive T-LymphocytesEnzyme-Linked Immunosorbent AssayFactor IXGenetic TherapyGenetic VectorsHemophilia BHumansImmunity, HumoralImmunohistochemistryMiceMicroscopy, FluorescenceMutationMutation, MissenseFactor IX

Identifiers

PMID19603001
PMCPMC2835008

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.