Evidence map›Paper›PMID 20228274›Full record

Trial reportBlood2010

Dynamics of gene-modified progenitor cells analyzed by tracking retroviral integration sites in a human SCID-X1 gene therapy trial.

Gary P Wang, Charles C Berry, Nirav Malani, Philippe Leboulch, Alain Fischer, Salima Hacein-Bey-Abina, Marina Cavazzana-Calvo, Frederic D Bushman

Open access · bronzeAbstract readClinical Trial
In one paragraph

Trial report in Blood, 2010. 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
10.4field-weighted citation impact, top 1% 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

78 citing papers in PubMed, 126 citations in OpenAlex.

  1. Trial
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  8. Review
  9. Article
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  11. Modulation of AAV transduction and integration targeting by topoisomerase poisons.Molecular therapy. Methods & clinical development · 2024
    Article
  12. Clonal tracking in cancer and metastasis.Cancer metastasis reviews · 2024
    Review
  13. Article
  14. Article
  15. Evaluation of diversity indices to estimate clonal dominance in gene therapy studies.Molecular therapy. Methods & clinical development · 2023
    Article
  16. Review
  17. Review
  18. Article
  19. 3' UTR-truncated HMGA2 overexpression induces non-malignantMolecular therapy. Methods & clinical development · 2021
    Article
  20. Review

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

8 authors at 5 institutions in 2 countries.

Gary P WangDepartment of Microbiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6076, USA.
Charles C Berry
Nirav Malani
Philippe Leboulch
Alain Fischer
Salima Hacein-Bey-Abina
Marina Cavazzana-Calvo
Frederic D Bushman
University of Pennsylvania · USUniversité Paris Cité · FRInserm · FRUniversité Paris-Saclay · FRUniversity of California, San Diego · US

Funding

Lentivirus-based Immunogene Therapy for HIV InfectionU19AI066290 · NIAID · UNIVERSITY OF PENNSYLVANIA · PI JUNE, CARL H. · 2005 to 2009
$7.2M
Favored Sites for HIV Integration in the Human GenomeR01AI052845 · NIAID · UNIVERSITY OF PENNSYLVANIA · PI BUSHMAN, FREDERIC D · 2002 to 2017
$5.6M
POSTDOCTORAL TRAINING GRANT IN INFECTIOUS DISEASEST32AI007634 · NIAID · UNIVERSITY OF PENNSYLVANIA · PI FRIEDMAN, HARVEY MICHAEL · 2001 to 2010
$1.2M
NIAID NIH HHS AI52845NIAID NIH HHS AI66290NIAID NIH HHS R01 AI052845NIAID NIH HHS T32 AI007634NIAID NIH HHS T32 AI07634NIAID NIH HHS U19 AI066290
6 · The paper itself

Abstract

X-linked severe-combined immunodeficiency (SCID-X1) has been treated by therapeutic gene transfer using gammaretroviral vectors, but insertional activation of proto-oncogenes contributed to leukemia in some patients. Here we report a longitudinal study of gene-corrected progenitor cell populations from 8 patients using 454 pyrosequencing to map vector integration sites, and extensive resampling to allow quantification of clonal abundance. The number of transduced cells infused into patients initially predicted the subsequent diversity of circulating cells. A capture-recapture analysis was used to estimate the size of the gene-corrected cell pool, revealing that less than 1/100th of the infused cells had long-term repopulating activity. Integration sites were clustered even at early time points, often near genes involved in growth control, and several patients harbored expanded cell clones with vectors integrated near the cancer-implicated genes CCND2 and HMGA2, but remain healthy. Integration site tracking also documented that chemotherapy for adverse events resulted in successful control. The longitudinal analysis emphasizes that key features of transduced cell populations--including diversity, integration site clustering, and expansion of some clones--were established early after transplantation. The approaches to sequencing and bioinformatics analysis reported here should be widely useful in assessing the outcome of gene therapy trials.

Indexed as

Epigenesis, GeneticGenetic TherapyGenetic VectorsHematopoietic Stem CellsHematopoietic Stem Cell TransplantationHumansLongitudinal StudiesMutagenesis, InsertionalProto-OncogenesRetroviridaeTransduction, GeneticTreatment OutcomeVirus IntegrationX-Linked Combined Immunodeficiency Diseases

Identifiers

PMID20228274
PMCPMC2881494
OpenAlexW1966991523

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.