Evidence map›Paper›PMID 20662590›Full record

ArticleHuman gene therapy2011

Rapid production of clinical-grade gammaretroviral vectors in expanded surface roller bottles using a "modified" step-filtration process for clearance of packaging cells.

Steven A Feldman, Stephanie L Goff, Hui Xu, Mary A Black, James N Kochenderfer, Laura A Johnson, James C Yang, Qiong Wang, Maria R Parkhurst, Scott Cross and 3 more

Abstract read
In one paragraph

Article in Human gene therapy, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing 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

13 citing papers in PubMed.

  1. Trial
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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

13 authors.

Steven A FeldmanSurgery Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA. feldmanst@mail.nih.gov
Stephanie L Goff
Hui Xu
Mary A Black
James N Kochenderfer
Laura A Johnson
James C Yang
Qiong Wang
Maria R Parkhurst
Scott Cross
Richard A Morgan
Kenneth Cornetta
Steven A Rosenberg

Funding

Gene therapy of cancerZIABC010985 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI ROSENBERG, STEVEN · 2009 to 2025
$56.8M
Clinical production of viral vectors for cancer gene therapyZICBC010989 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI BEYER, RACHEL · 2009 to 2025
$12.6M
Allogeneic T cells Transduced with an Anti-CD19 Chimeric Antigen ReceptorZIABC011415 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI KOCHENDERFER, JAMES · 2011 to 2025
$2.0M
Autologous T cells Transduced with an Anti-CD19 Chimeric Antigen ReceptorZIABC011413 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI KOCHENDERFER, JAMES · 2011 to 2016
$731k
6 · The paper itself

Abstract

Production of clinical-grade gammaretroviral vectors for ex vivo gene delivery requires a scalable process that can rapidly generate large amounts of vector supernatant, clear large numbers of residual packaging cells with minimal decreases in vector titer, and satisfy all current regulatory guidelines regarding product biosafety. To that end, we have developed a simplified method that is compliant with current good manufacturing practices for the production of clinical-grade gammaretroviral vectors in a clinical research environment. We validated a large-scale production platform utilizing 1,700-cm(2) expanded surface roller bottles and a "modified" step-filtration process consisting of a 40/150-μm dual-screen filter for aggregate removal followed by a Sepacell 500II leukocyte reduction filter for removal of residual packaging cells. This clarification process can clear at least 2 × 10(9) viable producer cells using a single filter set-up without any significant loss of titer post-filtration. This platform typically generates 18 liters of vector supernatant to support small-scale clinical trials, but can easily be scaled up to 70 liters during a single manufacturing run. To date, this platform has generated five clinical-grade gammaretroviral vector products, four of which are now being used in adoptive cell therapy clinical trials for the treatment of a variety of solid cancers.

Indexed as

Genetic VectorsAnimalsCell Culture TechniquesCell LineFiltrationGammaretrovirusGenetic TherapyMiceVirus Cultivation

Identifiers

PMID20662590
PMCPMC3026655

What OpenQuestion holds

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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.