Cited by 89Microbial Inactivation MethodsPhotodynamic Therapy Research StudiesPlasma Applications and Diagnostics

Tissue electroporation: quantification and analysis of heterogeneous transport in multicellular environments

Open access
Canatella, Paul J., Black, Matthew M., Bonnichsen, David M., McKenna, Conor, Prausnitz, Mark R.·2004·Biophysical Journal

Abstract

Although electroporation is gaining increased attention as a technology to enhance clinical chemotherapy and gene therapy of tissues, direct measurements of electroporation-mediated transport in multicellular environments are lacking. In this study, we used multicellular tumor spheroids of DU145 prostate cancer cells as a model tissue to measure the levels and distribution of molecular uptake in a multicellular environment as a function of electrical and other parameters. These measurements, and subsequent analysis, were used to test the hypothesis that cells in a multicellular environment respond to electroporation in a heterogeneous manner that differs from isolated cells in suspension due to differences in cell state, local solute concentration, and local electric field. In support of the hypothesis, molecular uptake was consistently lower for cells within spheroids than cells in dilute suspension and was spatially heterogeneous, with progressively less uptake observed for cells located deeper within spheroid interiors. Reduced uptake and heterogeneity can be explained quantitatively by accounting for the effects of cell size on transmembrane voltage and cell volume, limited extracellular solute reservoir, heterogeneous field strength due to influence of neighboring cells, and diffusional lag times.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/s0006-3495(04)74374-x

Cites

29 of 29 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Organoids grow into dense and compact structures that impede diffusion, penetration and cellular accumulation of genetic material, making transfection via traditional techniques difficult.

    “Moreover, organoids grow into dense and compact structures that impede diffusion, penetration and cellular accumulation of genetic material, which makes transfection via traditional techniques difficult (7–9).”

    From Direct transfection of clonal organoids in Matrigel microbeads: a promising approach toward organoid-based genetic screens (2018) · cites this paper as [8]

    The Results and discussion (page not available) report a diffusional delay into spheroid interiors and lower calcein uptake by interior cells during electroporation. The experiments concern multicellular spheroids and calcein, not organoids or genetic material; they do not establish that traditional transfection techniques are difficult in organoids. The paper also says the diffusion delay did not explain its uptake results after the longer incubation used for most experiments. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Direct 3D transfection on already formed organoids remains challenging.

    “However, direct 3D transfection on already formed organoids remains challenging.”

    From Direct transfection of clonal organoids in Matrigel microbeads: a promising approach toward organoid-based genetic screens (2018) · cites this paper as [8]

    The Results and discussion section reports that cells in already formed multicellular spheroids took up less calcein during electroporation than isolated cells, particularly deep within the spheroids. This supports a challenge with direct delivery into a 3D structure, but the paper tests calcein uptake in spheroids, not transfection of organoids. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Organoids are embedded in extracellular matrix, which constitutes a barrier for efficient transfection.

    “One limitation is that organoids are embedded in extracellular matrix and grow into compact structures that hinder transfection using traditional techniques.”

    From Direct transfection of clonal organoids in Matrigel microbeads: a promising approach toward organoid-based genetic screens (2018) · cites this paper as [8]

    The Introduction describes densely packed tumor spheroids surrounded by extracellular matrix, and the Conclusions report lower molecular uptake during electroporation than in isolated cells. But the study examines spheroids, not organoids, and does not establish that extracellular matrix itself is the barrier to transfection. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Lipofection and electroporation have been proven relatively inefficient in transfecting 3D cultures, with transfection efficiencies lower than 5% and 20%, respectively.

    “However, they have been proven to be relatively inefficient in transfecting 3D cultures with transfection efficiencies lower than 5 and 20%, respectively (7–9).”

    From Direct transfection of clonal organoids in Matrigel microbeads: a promising approach toward organoid-based genetic screens (2018) · cites this paper as [8]

    The Results and discussion section reports that cells in multicellular spheroids took up fewer molecules after electroporation than isolated cells, supporting a reduced-delivery effect in a 3D culture model. The study measured calcein uptake, not transfection efficiency, and does not establish the claimed below-20% figure or the lipofection figure. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Part of this paper’s reference list could not be split into single entries.

Flagged first, then by citations

1 of the 30 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Canatella, P. J., Black, M. M., Bonnichsen, D. M., McKenna, C., & Prausnitz, M. R.
Affiliations
Georgia Institute of Technology (US)
Corresponding author
Prausnitz, Mark R.
Venue
Biophysical Journal
Publisher
Elsevier BV
Published
2004-05
Volume
86
Issue
5
Pages
3260-3268
ISSN
0006-3495 (ISSN-L)
OpenAlex
W2141405401
Cited by
89
References
30
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 5 · 2022: 4 · 2021: 3 · 2020: 4 · 2018: 3 · 2017: 7 · 2016: 4 · 2015: 7 · 2014: 2 · 2013: 3 · 2012: 3
FWCI
4.71
Type
journal article
Language
en
Open access
Locations
  • Biophysical Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Science Foundation
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Microbial Inactivation Methods
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Photodynamic Therapy Research Studies
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Plasma Applications and Diagnostics
Keywords
electroporation, tumor spheroids, DU145 cells, transmembrane voltage, cell size effects, gene therapy, chemotherapy enhancement, tissue electroporation
MeSH terms
Biological Transport, Biophysics, Calibration, Cell Separation, Extracellular Matrix, Flow Cytometry, Humans, Ion Channels, Male, Membrane Potentials, Prostatic Neoplasms, Time Factors, Models, Statistical, Electroporation, Cell Line, Tumor

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review