Evidence map›Paper›PMID 28064447›Full record

ArticleCancer medicine2017

Up-regulation of miR-497 confers resistance to temozolomide in human glioma cells by targeting mTOR/Bcl-2.

Danhua Zhu, Ming Tu, Bo Zeng, Lin Cai, Weiming Zheng, Zhipeng Su, Zhengquan Yu

Abstract read
In one paragraph

Article in Cancer medicine, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing 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

23 citing papers in PubMed.

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  7. Insulin Resistance and Cancer: In Search for a Causal Link.International journal of molecular sciences · 2021
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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

7 authors.

Danhua ZhuDepartment of Neurosurgery, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Canglang District, Suzhou, Jiangsu, 215000, China.
Ming TuDepartment of Neurosurgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China.
Bo ZengDepartment of Neurosurgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China.
Lin CaiDepartment of Neurosurgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China.
Weiming ZhengDepartment of Neurosurgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China.
Zhipeng SuDepartment of Neurosurgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China.
Zhengquan YuDepartment of Neurosurgery, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Canglang District, Suzhou, Jiangsu, 215000, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The occurrence of an inherent or acquired resistance to temozolomide (TMZ) is a major burden for patients suffering from glioma. Recently, studies have demonstrated that microRNAs play an important role in the regulation of tumor properties in cancers. However, whether miR-497 contributes to glioma resistance to chemotherapy is not fully understood. In this study, we showed that the expression of miR-497 was markedly up-regulated in TMZ-resistant glioma cells; high miR-497 expression level was associated with TMZ-resistant phenotype of glioma cells. The down-regulation of miR-497 in glioma cells enhanced the apoptosis-induction and growth inhibition effects of TMZ both in vitro and in vivo, whereas promotion of miR-497 increased the chemosensitization of glioma cells to TMZ. The increased level of miR-497 in TMZ-resistant glioma cells was concurrent with the up-regulation of insulin-like growth factor 1 receptor (IGF1R)/insulin receptor substrate 1 (IRS1) pathway-related proteins, that is, IGF1R, IRS1, mammalian target of rapamycin (mTOR), and Bcl-2. In addition, the knockdown of mTOR and Bcl-2 reduced the tolerance of glioma cells to TMZ. Our results demonstrated that overexpression of miR-497 is significantly correlated with TMZ resistance in glioma cells by regulating the IGF1R/IRS1 pathway. Therefore, miR-497 may be used as a new target for treatment of chemotherapy-resistant glioma.

Indexed as

Drug Resistance, NeoplasmUp-Regulation3' Untranslated RegionsAnimalsAntineoplastic Agents, AlkylatingApoptosisBrain NeoplasmsCell Line, TumorCell ProliferationDacarbazineGene Expression Regulation, NeoplasticGliomaHumansMiceMicroRNAsProto-Oncogene Proteins c-bcl-23' Untranslated RegionsAntineoplastic Agents, AlkylatingBCL2 protein, humanDacarbazineMicroRNAsMIRN497 microRNA, humanMTOR protein, humanProto-Oncogene Proteins c-bcl-2TemozolomideTOR Serine-Threonine KinasesIGF1R/IRS1 pathwaymicroRNAproliferationtumor biology

Identifiers

PMID28064447
PMCPMC5313645

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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.