Evidence map›Paper›PMID 34536314›Full record

ArticleCancer science2021

Lomustine and nimustine exert efficient antitumor effects against glioblastoma models with acquired temozolomide resistance.

Shun Yamamuro, Masamichi Takahashi, Kaishi Satomi, Nobuyoshi Sasaki, Tatsuya Kobayashi, Eita Uchida, Daisuke Kawauchi, Tomoyuki Nakano, Takashi Fujii, Yoshitaka Narita and 5 more

Abstract read
In one paragraph

Article in Cancer science, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing 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

25 citing papers in PubMed.

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  19. Review
  20. Glioblastoma Treatment: State-of-the-Art and Future Perspectives.International journal of molecular sciences · 2022
    Review
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

15 authors.

Shun YamamuroDivision of Brain Tumor Translational Research, National Cancer Center Research Institute, Chuo-ku, Japan.
Masamichi TakahashiDivision of Brain Tumor Translational Research, National Cancer Center Research Institute, Chuo-ku, Japan.ORCID https://orcid.org/0000-0001-8792-1993
Kaishi SatomiDivision of Brain Tumor Translational Research, National Cancer Center Research Institute, Chuo-ku, Japan.
Nobuyoshi SasakiDivision of Brain Tumor Translational Research, National Cancer Center Research Institute, Chuo-ku, Japan.
Tatsuya KobayashiDivision of Brain Tumor Translational Research, National Cancer Center Research Institute, Chuo-ku, Japan.
Eita UchidaDivision of Brain Tumor Translational Research, National Cancer Center Research Institute, Chuo-ku, Japan.
Daisuke KawauchiDivision of Brain Tumor Translational Research, National Cancer Center Research Institute, Chuo-ku, Japan.
Tomoyuki NakanoDivision of Brain Tumor Translational Research, National Cancer Center Research Institute, Chuo-ku, Japan.ORCID https://orcid.org/0000-0003-0933-1714
Takashi FujiiDivision of Brain Tumor Translational Research, National Cancer Center Research Institute, Chuo-ku, Japan.
Yoshitaka NaritaDepartment of Neurosurgery and Neuro-Oncology, National Cancer Center Hospital, Chuo-ku, Japan.
Akihide KondoDepartment of Neurosurgery, Juntendo University School of Medicine, Bunkyo-ku, Japan.
Kojiro WadaDepartment of Neurosurgery, National Defense Medical College, Tokorozawa, Japan.
Atsuo YoshinoDepartment of Neurological Surgery, Nihon University School of Medicine, Itabashi-ku, Japan.
Koichi IchimuraDivision of Brain Tumor Translational Research, National Cancer Center Research Institute, Chuo-ku, Japan.ORCID https://orcid.org/0000-0002-3851-2349
Arata TomiyamaDivision of Brain Tumor Translational Research, National Cancer Center Research Institute, Chuo-ku, Japan.ORCID https://orcid.org/0000-0003-2944-6535

Funding

Grant-in-Aid for Scientific Research (C) 20K17980Ministry of Education, Culture, Sports, Science, and Technology of Japan
6 · The paper itself

Abstract

Glioblastomas (GBM) often acquire resistance against temozolomide (TMZ) after continuous treatment and recur as TMZ-resistant GBM (TMZ-R-GBM). Lomustine (CCNU) and nimustine (ACNU), which were previously used as standard therapeutic agents against GBM before TMZ, have occasionally been used for the salvage therapy of TMZ-R-GBM; however, their efficacy has not yet been thoroughly examined. Therefore, we investigated the antitumor effects of CCNU and ACNU against TMZ-R-GBM. As a model of TMZ-R-GBM, TMZ resistant clones of human GBM cell lines (U87, U251MG, and U343MG) were established (TMZ-R-cells) by the culture of each GBM cells under continuous TMZ treatment, and the antitumor effects of TMZ, CCNU, or ACNU against these cells were analyzed in vitro and in vivo. As a result, although growth arrest and apoptosis were triggered in all TMZ-R-cells after the administration of each drug, the antitumor effects of TMZ against TMZ-R-cells were significantly reduced compared to those of parental cells, whereas CCNU and ACNU demonstrated efficient antitumor effects on TMZ-R-cells as well as parental cells. It was also demonstrated that TMZ resistance of TMZ-R-cells was regulated at the initiation of DNA damage response. Furthermore, survival in mice was significantly prolonged by systemic treatment with CCNU or ACNU but not TMZ after implantation of TMZ-R-cells. These findings suggest that CCNU or ACNU may serve as a therapeutic agent in salvage treatment against TMZ-R-GBM.

Indexed as

Drug Resistance, NeoplasmAnimalsAntineoplastic AgentsBrain NeoplasmsDNA Modification MethylasesDNA Repair EnzymesFemaleGlioblastomaHistonesHumansInjections, IntraperitonealLomustineMethylationMiceMice, Inbred BALB CMice, NudeAntineoplastic AgentsDNA Modification MethylasesDNA Repair EnzymesH2AX protein, humanHistonesLomustineMGMT protein, humanNimustineTemozolomideTumor Suppressor Proteinsglioblastomalomustinenimustinenitrosoureatemozolomide resistance

Identifiers

PMID34536314
PMCPMC8586660

What OpenQuestion holds

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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.