Evidence map›Paper›PMID 33473355›Full record

ReviewMolecular therapy. Methods & clinical development2021

qPCR and qRT-PCR analysis: Regulatory points to consider when conducting biodistribution and vector shedding studies.

Haiyan Ma, Kristin N Bell, Rossi N Loker

Abstract readReview
In one paragraph

Review in Molecular therapy. Methods & clinical development, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers.

0numbers the graph read from it
0cells of the map it votes in
73citing 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

73 citing papers in PubMed.

  1. Article
  2. Article
  3. Review
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  5. Staphylococcal Cassette ChromosomeAntibiotics (Basel, Switzerland) · 2026
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  7. Article
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  18. Article
  19. Archives of medical science : AMS · 2026
    Article
  20. Review

13 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

3 authors.

Haiyan MaNorthern Biomolecular Services, 4717 Campus Drive, Kalamazoo, MI 49008, USA.
Kristin N BellNorthern Biomolecular Services, 4717 Campus Drive, Kalamazoo, MI 49008, USA.
Rossi N LokerNorthern Biomolecular Services, 4717 Campus Drive, Kalamazoo, MI 49008, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Gene and cell therapy fields have experienced remarkable growth during the past decade. Demands for preclinical and clinical safety assessments of these cell and gene therapy test articles (TAs) have effectively increased the necessity for regulated biodistribution, vector shedding, gene expression, and/or pharmacokinetics bioanalysis studies. Guidance documents issued from numerous international regulatory authorities recommend the use of quantitative polymerase chain reaction (qPCR) and/or quantitative reverse transcriptase PCR (qRT-PCR) assays due to their highly sensitive and robust target-specific detection. However, only preclinical biodistribution assay sensitivity is specified in these documents. Criteria such as accuracy, precision, and repeatability are not yet defined. This guidance void has resulted in several conflicting institutional interpretations of essential parameters necessary for the development and validation of robust assays to support safety assessments of gene and cell therapy TAs. There is an urgent need for an ongoing discussion among bioanalytical scientists in this field to generate a "best practice" consensus around preclinical and clinical qPCR/qRT-PCR assay design. With regard to this need, we offer critical points to consider when developing, validating, running sample analysis, and reporting qPCR/qRT-PCR assays.

Indexed as

biodistributionclinicalgene expressiongood laboratory practicemethod developmentmethod validationpreclinicalqPCRqRT-PCRregulatory guidancesample analysisvector shedding

Identifiers

PMID33473355
PMCPMC7786041

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Registered trials

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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.