Evidence map›Paper›PMID 25429463›Full record

ArticleCurrent gene therapy2015

Preclinical evaluation of efficacy and safety of an improved lentiviral vector for the treatment of β-thalassemia and sickle cell disease.

Olivier Negre, Cynthia Bartholomae, Yves Beuzard, Marina Cavazzana, Lauryn Christiansen, Céline Courne, Annette Deichmann, Maria Denaro, Edouard de Dreuzy, Mitchell Finer and 14 more

Open access · greenAbstract read
In one paragraph

Article in Current gene therapy, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 76 papers.

0numbers the graph read from it
0cells of the map it votes in
76citing papers in PubMed
7.5field-weighted citation impact, top 2% 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

76 citing papers in PubMed, 117 citations in OpenAlex.

  1. Trial
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  4. Article
  5. Ex Vivo Gene and Cell Therapy in Hematopoietic Stem Cells.International journal of molecular sciences · 2025
    Review
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  7. Article
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  16. Development of anMolecular therapy. Methods & clinical development · 2023
    Article
  17. Clinical applications of gene therapy for rare diseases: A review.International journal of experimental pathology · 2023
    Review
  18. Review
  19. Review
  20. Review

16 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

24 authors at 8 institutions in 3 countries.

Olivier Negre
Cynthia Bartholomae
Yves Beuzard
Marina Cavazzana
Lauryn Christiansen
Céline Courne
Annette Deichmann
Maria Denaro
Edouard de Dreuzy
Mitchell Finer
Raffaele Fronza
Béatrix Gillet-Legrand
Christophe Joubert
Robert Kutner
Philippe Leboulch
Leïla Maouche
Anaïs Paulard
Francis J Pierciey
Michael Rothe
Byoung Ryu
Manfred Schmidt
Christof von Kalle
Emmanuel Payen
Gabor Veresbluebird bio, 150 Second Street, Cambridge, MA 02141, USA. gveres@bluebirdbio.com.
Université Paris-Saclay · FRBluebird Bio (France) · FRGerman Cancer Research Center · DECommissariat à l'Énergie Atomique et aux Énergies Alternatives · FRHarvard University Press · USMedizinische Hochschule Hannover · DETranslational Research in Oncology · FRUniversité Paris Cité · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A previously published clinical trial demonstrated the benefit of autologous CD34(+) cells transduced with a selfinactivating lentiviral vector (HPV569) containing an engineered β-globin gene (β(A-T87Q)-globin) in a subject with β thalassemia major. This vector has been modified to increase transduction efficacy without compromising safety. In vitro analyses indicated that the changes resulted in both increased vector titers (3 to 4 fold) and increased transduction efficacy (2 to 3 fold). An in vivo study in which 58 β-thalassemic mice were transplanted with vector- or mock-transduced syngenic bone marrow cells indicated sustained therapeutic efficacy. Secondary transplantations involving 108 recipients were performed to evaluate long-term safety. The six month study showed no hematological or biochemical toxicity. Integration site (IS) profile revealed an oligo/polyclonal hematopoietic reconstitution in the primary transplants and reduced clonality in secondary transplants. Tumor cells were detected in the secondary transplant mice in all treatment groups (including the control group), without statistical differences in the tumor incidence. Immunohistochemistry and quantitative PCR demonstrated that tumor cells were not derived from transduced donor cells. This comprehensive efficacy and safety data provided the basis for initiating two clinical trials with this second generation vector (BB305) in Europe and in the USA in patients with β-thalassemia major and sickle cell disease.

Indexed as

Genetic VectorsAnemia, Sickle CellAnimalsAntigens, CD34beta-ThalassemiaComputational BiologyDisease Models, AnimalDNA DamageFemaleGene ExpressionGenetic TherapyGene Transfer TechniquesHematopoietic Stem Cell TransplantationLentivirusMaleMiceAntigens, CD34

Identifiers

PMID25429463
PMCPMC4440358
OpenAlexW2116613468

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.