Evidence map›Paper›PMID 30628709›Full record

ArticleOncology reports2019

Electrochemotherapy of radioresistant head and neck squamous cell carcinoma cells and tumor xenografts.

Martina Niksic Zakelj, Ajda Prevc, Simona Kranjc, Maja Cemazar, Vesna Todorovic, Monika Savarin, Janez Scancar, Tina Kosjek, Blaz Groselj, Primoz Strojan and 1 more

Open access · hybridAbstract read
In one paragraph

Article in Oncology reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
2.9field-weighted citation impact, top 10% 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 27 citations in OpenAlex.

  1. Treatment benefit of electrochemotherapy for superficial squamous cell carcinoma: a systematic review and single-arm meta-analysis.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2024
    Pooled it
  2. Article
  3. Article
  4. Reversible electroporation for cancer therapy.The British journal of radiology · 2025
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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 3 institutions in 1 country.

Martina Niksic ZakeljDepartment of Experimental Oncology, Institute of Oncology Ljubljana, SI‑1000 Ljubljana, Slovenia.
Ajda PrevcDepartment of Experimental Oncology, Institute of Oncology Ljubljana, SI‑1000 Ljubljana, Slovenia.
Simona KranjcDepartment of Experimental Oncology, Institute of Oncology Ljubljana, SI‑1000 Ljubljana, Slovenia.
Maja CemazarDepartment of Experimental Oncology, Institute of Oncology Ljubljana, SI‑1000 Ljubljana, Slovenia.
Vesna TodorovicDepartment of Experimental Oncology, Institute of Oncology Ljubljana, SI‑1000 Ljubljana, Slovenia.
Monika SavarinDepartment of Experimental Oncology, Institute of Oncology Ljubljana, SI‑1000 Ljubljana, Slovenia.
Janez ScancarDepartment of Environmental Sciences, Jozef Stefan Institute, SI‑1000 Ljubljana, Slovenia.
Tina KosjekDepartment of Environmental Sciences, Jozef Stefan Institute, SI‑1000 Ljubljana, Slovenia.
Blaz GroseljDepartment of Radiation Oncology, Institute of Oncology Ljubljana, SI‑1000 Ljubljana, Slovenia.
Primoz StrojanFaculty of Medicine, University of Ljubljana, SI‑1000 Ljubljana, Slovenia.
Gregor SersaDepartment of Experimental Oncology, Institute of Oncology Ljubljana, SI‑1000 Ljubljana, Slovenia.
Institute of Oncology Ljubljana · SIJožef Stefan Institute · SIUniversity of Ljubljana · SI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Electrochemotherapy is an established local ablative method used for the treatment of different tumor types, including tumors of the head and neck area. Clinical studies have demonstrated a lower response rate of tumors that recur in pre‑irradiated area. The aim of the present study was to explore the response of experimentally induced radioresistant cells and tumors to electrochemotherapy with cisplatin or bleomycin. The radioresistant cells (FaDu‑RR) were established by fractionated irradiation of parental human squamous cell carcinoma cell line, FaDu. We compared the 2 cell lines in response to chemotherapy and electrochemotherapy with cisplatin or bleomycin in vitro and in vivo. Using specific mass spectrometry‑based analytical methods we determined the difference in the uptake of chemotherapeutics in tumors after electrochemotherapy. Additionally, we compared the capacity of the cells to repair DNA double‑strand breaks (DSB) after exposure to the drugs used in electrochemotherapy with the γH2AX foci resolution determined by immunofluorescence microscopy. Our results indicate radio‑ and cisplatin cross‑resistance, confirmed with the lower response rate of radioresistant tumors after electrochemotherapy with cisplatin. On the other hand, the sensitivity to electrochemotherapy with bleomycin was similar in both cell lines and tumors. While the uptake of chemotherapeutics after electrochemotherapy was comparable in both tumor models, there was a difference between the cell lines in capacity to repair DNA DSB‑the radioresistant cells had a lower level of DSB and faster DNA repair rate after exposure to both, cisplatin or bleomycin. Due to the higher complete response rate after electrochemotherapy with bleomycin than with cisplatin, we conclude that the results favor bleomycin‑over cisplatin‑based electrochemotherapy for treatment of radioresistant tumors and/or tumors that regrow after radiotherapy.

Indexed as

AnimalsAntineoplastic AgentsBleomycinCisplatinDNA Breaks, Double-StrandedElectrochemotherapyFemaleHead and Neck NeoplasmsHumansMiceMice, SCIDNeoplasm Recurrence, LocalRadiation ToleranceSquamous Cell Carcinoma of Head and NeckTreatment OutcomeXenograft Model Antitumor AssaysAntineoplastic AgentsBleomycinCisplatin

Identifiers

PMID30628709
PMCPMC6365705
OpenAlexW2910094691

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.