Evidence map›Paper›PMID 26566863›Full record

ArticleCell cycle (Georgetown, Tex.)2015

The histone demethylase KDM5A is a key factor for the resistance to temozolomide in glioblastoma.

Barbara Banelli, Elisa Carra, Federica Barbieri, Roberto Würth, Federica Parodi, Alessandra Pattarozzi, Roberta Carosio, Alessandra Forlani, Giorgio Allemanni, Daniela Marubbi and 3 more

Open access · bronzeAbstract read
In one paragraph

Article in Cell cycle (Georgetown, Tex.), 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 76 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
76citing papers in PubMed, 1 pooled it
6.2field-weighted citation impact, top 3% 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

76 citing papers in PubMed, 1 synthesis or guideline pooled it, 127 citations in OpenAlex.

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  12. Serendipity in Neuro-Oncology: The Evolution of Chemotherapeutic Agents.International journal of molecular sciences · 2025
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16 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

13 authors at 4 institutions in 3 countries.

Barbara Banellia Laboratory of Tumor Epigenetics; IRCCS AOU San Martino - IST ; Genova , Italy.
Elisa Carrab Laboratory of Regenerative Medicine; IRCCS AOU San Martino - IST ; Genova , Italy.
Federica Barbieric Section of Pharmacology ; Department of Internal Medicine and Center of Excellence for Biomedical Research (CEBR); University of Genova ; Genova , Italy.
Roberto Würthc Section of Pharmacology ; Department of Internal Medicine and Center of Excellence for Biomedical Research (CEBR); University of Genova ; Genova , Italy.
Federica Parodia Laboratory of Tumor Epigenetics; IRCCS AOU San Martino - IST ; Genova , Italy.
Alessandra Pattarozzic Section of Pharmacology ; Department of Internal Medicine and Center of Excellence for Biomedical Research (CEBR); University of Genova ; Genova , Italy.
Roberta Carosioa Laboratory of Tumor Epigenetics; IRCCS AOU San Martino - IST ; Genova , Italy.
Alessandra Forlania Laboratory of Tumor Epigenetics; IRCCS AOU San Martino - IST ; Genova , Italy.
Giorgio Allemannia Laboratory of Tumor Epigenetics; IRCCS AOU San Martino - IST ; Genova , Italy.
Daniela Marubbib Laboratory of Regenerative Medicine; IRCCS AOU San Martino - IST ; Genova , Italy.
Tullio Florioc Section of Pharmacology ; Department of Internal Medicine and Center of Excellence for Biomedical Research (CEBR); University of Genova ; Genova , Italy.
Antonio Dagab Laboratory of Regenerative Medicine; IRCCS AOU San Martino - IST ; Genova , Italy.
Massimo Romania Laboratory of Tumor Epigenetics; IRCCS AOU San Martino - IST ; Genova , Italy.
Ospedale Policlinico San Martino · ITUniversity of Genoa · ITInstitute of Pharmacology · CZRegenerative Medicine Institute · MX

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Notwithstanding current multimodal treatment, including surgery, radiotherapy and chemotherapy with temozolomide (TMZ), median survival of glioblastoma (GBM) patients is about 14 months, due to the rapid emergence of cell clones resistant to treatment. Therefore, understanding the mechanisms underlying chemoresistance is mandatory to improve treatments' outcome. We generated TMZ resistant cells (TMZ-R) from a GBM cell line and from cancer stem cell-enriched cultures isolated from human GBMs. We demonstrated that TMZ resistance is partially reverted by "drug wash-out" suggesting the contribution of epigenetic mechanisms in drug resistance and supporting the possibility of TMZ rechallenge in GBM patients after prior drug exposure. The expression of histone lysine demethylase genes (KDMs) was increased in TMZ-R cells compared to parental cells, and TMZ resistance or restored sensitivity was mimicked by over-expressing or inactivating KDM5A. Methylation and expression of O6-methylguanine-DNA methyltransferase (MGMT) and drug efflux mechanisms were not altered in TMZ-R cells compared to parental TMZ sensitive cells. TMZ-R cells transiently acquired morphologic and molecular characteristics of differentiated tumor cells, features that were lost after drug wash-out. In conclusion, we demonstrated that treatment-induced TMZ resistance in GBM involves epigenetic mechanisms in a subset of slow-cycling and transiently partially differentiated cells that escape drug cytotoxicity, overcome G2 checkpoint and sustain clonal growth. We found that TMZ-R cells are sensitive to histone deacethylase inhibitors (HDACi) that synergize with TMZ. This strong synergism could be exploited to develop novel combined adjuvant therapies for this rapidly progressing and invariably lethal cancer.

Indexed as

Drug Resistance, NeoplasmAntineoplastic Agents, AlkylatingAntineoplastic Combined Chemotherapy ProtocolsApoptosisBrain NeoplasmsCell CycleCell DifferentiationCell Line, TumorCell ShapeDacarbazineDNA MethylationDose-Response Relationship, DrugDrug SynergismEpigenesis, GeneticGene Expression Regulation, NeoplasticGenotypeAntineoplastic Agents, AlkylatingDacarbazineHistone Deacetylase InhibitorsKDM5A protein, humanRetinoblastoma-Binding Protein 2Temozolomidecancer stem cellsDNA methylationepigeneticglioblastomahistone demethylaseKDM5Atemozolomide

Identifiers

PMID26566863
PMCPMC4825557
OpenAlexW2257580565

What OpenQuestion holds

Textmetadata
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.