Evidence map›Paper›PMID 22077817›Full record

ArticleHuman gene therapy2012

Long-term expression of human coagulation factor VIII in a tolerant mouse model using the φC31 integrase system.

Christopher L Chavez, Annahita Keravala, Jacqueline N Chu, Alfonso P Farruggio, Vanessa E Cuéllar, Jan Voorberg, Michele P Calos

Abstract read
In one paragraph

Article in Human gene therapy, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
2.0field-weighted citation impact, top 14% 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

11 citing papers in PubMed, 22 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Liver-targeted gene therapy: Approaches and challenges.Liver transplantation : official publication of the American Association for the Study of Liver Diseases and the International Liver Transplantation Society · 2015
    Review
  5. Review
  6. New applications for phage integrases.Journal of molecular biology · 2014
    Review
  7. Article
  8. piggyBac-mediated phenotypic correction of factor VIII deficiency.Molecular therapy. Methods & clinical development · 2014
    Article
  9. Article
  10. Article
  11. Article
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

7 authors at 1 institution in 1 country.

Christopher L ChavezDepartment of Genetics, Stanford University School of Medicine, Stanford, CA 94305-5120, USA.
Annahita Keravala
Jacqueline N Chu
Alfonso P Farruggio
Vanessa E Cuéllar
Jan Voorberg
Michele P Calos
Stanford University · US

Funding

Transferring Integrase Technology to AnimalsR01HL068112 · NHLBI · STANFORD UNIVERSITY · PI CALOS, MICHELE P · 2001 to 2006
$1.8M
Transferring Integrase Technology to AnimalsR56HL068112 · NHLBI · STANFORD UNIVERSITY · PI CALOS, MICHELE P · 2007 to 2007
$356k
NHLBI NIH HHS HL068112
6 · The paper itself

Abstract

We generated a mouse model for hemophilia A that combines a homozygous knockout for murine factor VIII (FVIII) and a homozygous addition of a mutant human FVIII (hFVIII). The resulting mouse, having no detectable FVIII protein or activity and tolerant to hFVIII, is useful for evaluating FVIII gene-therapy protocols. This model was used to develop an effective gene-therapy strategy using the φC31 integrase to mediate permanent genomic integration of an hFVIII cDNA deleted for the B-domain. Various plasmids encoding φC31 integrase and hFVIII were delivered to the livers of these mice by using hydrodynamic tail-vein injection. Long-term expression of therapeutic levels of hFVIII was observed over a 6-month time course when an intron was included in the hFVIII expression cassette and wild-type φC31 integrase was used. A second dose of the hFVIII and integrase plasmids resulted in higher long-term hFVIII levels, indicating that incremental doses were beneficial and that a second dose of φC31 integrase was tolerated. We observed a significant decrease in the bleeding time after a tail-clip challenge in mice treated with plasmids expressing hFVIII and φC31 integrase. Genomic integration of the hFVIII expression plasmid was demonstrated by junction PCR at a known hotspot for integration in mouse liver. The φC31 integrase system provided a nonviral method to achieve long-term FVIII gene therapy in a relevant mouse model of hemophilia A.

Indexed as

AnimalsDisease Models, AnimalFactor VIIIGene ExpressionGenetic TherapyHemophilia AHumansIntegrasesMiceMice, Inbred C57BLTransfectionFactor VIIIIntegrases

Identifiers

PMID22077817
PMCPMC3327602
OpenAlexW1998991911

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.