Evidence map›Paper›PMID 33186538›Full record

ArticleStem cell reports2021

β-Globin Lentiviral Vectors Have Reduced Titers due to Incomplete Vector RNA Genomes and Lowered Virion Production.

Jiaying Han, Kevin Tam, Feiyang Ma, Curtis Tam, Bamidele Aleshe, Xiaoyan Wang, Jason P Quintos, Marco Morselli, Matteo Pellegrini, Roger P Hollis and 1 more

Open access · goldAbstract read
In one paragraph

Article in Stem cell reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
1.3field-weighted citation impact, top 21% 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

20 citing papers in PubMed, 24 citations in OpenAlex.

  1. Trial
  2. Trial
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  4. Review
  5. Article
  6. Review
  7. Quantifying the mutational landscape of retroviral and lentiviral vectors in gene therapy patients.Molecular therapy : the journal of the American Society of Gene Therapy · 2025
    Article
  8. Enhancing titers of therapeutic lentiviral vectors using PKC agonists.Molecular therapy. Methods & clinical development · 2025
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
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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

11 authors at 2 institutions in 1 country.

Jiaying HanDepartment of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Terasaki Life Sciences Building, 610 Charles E. Young Drive East, Los Angeles, CA 90095-1489, USA.
Kevin TamDepartment of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, USA.
Feiyang MaDepartment of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, USA.
Curtis TamDepartment of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, USA.
Bamidele AlesheDepartment of Microbiology, Immunology & Molecular Genetics, David Geffen School of Medicine, University of California, Los Angeles, USA.
Xiaoyan WangDepartment of General Internal Medicine and Health Services Research, UCLA, Los Angeles, CA, USA.
Jason P QuintosDepartment of Microbiology, Immunology & Molecular Genetics, David Geffen School of Medicine, University of California, Los Angeles, USA.
Marco MorselliDepartment of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, USA.
Matteo PellegriniDepartment of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, USA.
Roger P HollisDepartment of Microbiology, Immunology & Molecular Genetics, David Geffen School of Medicine, University of California, Los Angeles, USA.
Donald B KohnDepartment of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Terasaki Life Sciences Building, 610 Charles E. Young Drive East, Los Angeles, CA 90095-1489, USA; Department of Microbiology, Immunology & Molecular Genetics, David Geffen School of Medicine, University of California, Los Angeles, USA; Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, USA; The Eli & Edythe Broad Center of Regenerative Medicine & Stem Cell Research, University of California, Los Angeles, USA; UCLA Jonsson Comprehensive Cancer Center, Los Angeles, USA. Electronic address: dkohn1@mednet.ucla.edu.
University of California, Los Angeles · USTerasaki Foundation · US

Funding

Virology CoreP30AI028697 · NIAID · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI ZACK, JEROME A. · 1991 to 2018
$39.9M
MARC U*STAR Program at the University of California, Los AngelesT34GM008563 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI MCEVOY, MEGAN M, POE, GINA R · 1996 to 2023
$9.7M
Interdisciplinary Training in Virology and Gene TherapyT32AI060567 · NIAID · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI WU, TING-TING · 2004 to 2018
$3.4M
Enhancing the Efficiency of Non-REM Sleep Temporal Dynamics to Improve Insight LearningR21MH119020 · NIMH · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI POE, GINA R · 2019 to 2020
$442k
NIAID NIH HHS P30 AI028697NIAID NIH HHS T32 AI060567NIGMS NIH HHS T34 GM008563NIMH NIH HHS R21 MH119020
6 · The paper itself

Abstract

Lentiviral vectors (LVs) commonly used for the treatment of hemoglobinopathies often have low titers and sub-optimal gene transfer efficiency for human hematopoietic stem and progenitor cells (HSPCs), hindering clinical translation and commercialization for ex vivo gene therapy. We observed that a high percentage of β-globin LV viral genomic RNAs were incomplete toward the 3' end in packaging cells and in released vector particles. The incomplete vector genomes impeded reverse transcription in target cells, limiting stable gene transfer to HSPCs. By combining three modifications to vector design and production (shortening the vector length to 5.3 kb; expressing HIV-1 Tat protein during packaging; and packaging in PKR-/- cells) there was a 30-fold increase in vector titer and a 3-fold increase in vector infectivity in HSPCs. These approaches may improve the manufacturing of β-globin and other complex LVs for enhanced gene delivery and may facilitate clinical applications.

Indexed as

beta-GlobinsGenetic VectorsGene Transfer TechniquesHEK293 CellsHumansLentivirusRNAtat Gene Products, Human Immunodeficiency VirusVirionbeta-GlobinsRNAtat Gene Products, Human Immunodeficiency Virusgene and cell therapyhematopoietic stem cellshemoglobinopathylentiviral vectorsickle cell disease

Identifiers

PMID33186538
PMCPMC7897704
OpenAlexW3099830670

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.