Evidence map›Paper›PMID 32611363›Full record

ArticleMolecular medicine (Cambridge, Mass.)2020

Primary resistance to first-generation EGFR-TKIs induced by MDM2 amplification in NSCLC.

Dantong Sun, Yan Zhu, Jingjuan Zhu, Junyan Tao, Xiaojuan Wei, Yang Wo, Helei Hou

Open access · goldAbstract readCase Reports
In one paragraph

Article in Molecular medicine (Cambridge, Mass.), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
3.9field-weighted citation impact, top 5% 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 41 citations in OpenAlex.

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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 at 1 institution in 1 country.

Dantong SunPrecision Medicine Center of Oncology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China.
Yan ZhuDepartment of Medical Oncology, The Municipal Hospital of Qingdao, Qingdao, 266000, Shandong, China.
Jingjuan ZhuPrecision Medicine Center of Oncology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China.
Junyan TaoPrecision Medicine Center of Oncology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China.
Xiaojuan WeiDepartment of Radiation Oncology, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China.
Yang WoDepartment of Thoracic Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China.
Helei HouPrecision Medicine Center of Oncology, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266000, Shandong, China. houhelei@qdu.edu.cn.ORCID 0000-0002-4266-4214
Qingdao University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionTargeted therapy for NSCLC is rapidly evolving. EGFR-TKIs benefit NSCLC patients with sensitive EGFR mutations and significantly prolong survival. However, 20-30% of patients demonstrate primary resistance to EGFR-TKIs, which leads to the failure of EGFR-TKI treatment. The mechanisms of primary resistance to EGFR-TKIs require further study.

methodsTargeted sequencing was used for the detection of genomic alterations among patients in our center. Regular cell culture and transfection with plasmids were used to establish NSCLC cell lines over-expressing MDM2 and vector control. We used the MTT assays to calculate the inhibition rate after exposure to erlotinib. Available datasets were used to determine the role of MDM2 in the prognosis of NSCLC.

resultsFour patients harboring concurrent sensitive EGFR mutations and MDM2 amplifications demonstrated insensitivity to EGFR-TKIs in our center. In vitro experiments suggested that MDM2 amplification induces primary resistance to erlotinib. Over-expressed MDM2 elevated the IC50 value of erlotinib in HCC2279 line and reduced the inhibition rate. In addition, MDM2 amplification predicted a poor prognosis in NSCLC patients and was associated with a short PFS in those treated with EGFR-TKIs. The ERBB2 pathway was identified as a potential pathway activated by MDM2 amplification could be the focus of further research.

conclusionMDM2 amplification induces the primary resistance to EGFR-TKIs and predicts poor prognosis in NSCLC patients. MDM2 may serve as a novel biomarker and treatment target for NSCLC. Further studies are needed to confirm the mechanism by which amplified MDM2 leads to primary resistance to EGFR-TKIs.

Indexed as

Gene AmplificationAgedBiomarkers, TumorBrain NeoplasmsCarcinoma, Non-Small-Cell LungCell Line, TumorDrug Resistance, NeoplasmErbB ReceptorsFemaleHumansLung NeoplasmsMagnetic Resonance ImagingMaleMiddle AgedMutationNeoplasm StagingBiomarkers, TumorEGFR protein, humanErbB ReceptorsMDM2 protein, humanProtein Kinase InhibitorsProto-Oncogene Proteins c-mdm2EGFR-TKIsMDM2 amplificationNSCLCPrimary resistancePrognosis

Identifiers

PMID32611363
PMCPMC7329552
OpenAlexW3039673268

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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.