Evidence map›Paper›PMID 22419550›Full record

ArticleEMBO molecular medicine2012

TROP2 is epigenetically inactivated and modulates IGF-1R signalling in lung adenocarcinoma.

Jau-Chen Lin, Yi-Ying Wu, Jing-Yi Wu, Tzu-Chieh Lin, Chen-Tu Wu, Yih-Leong Chang, Yuh-Shan Jou, Tse-Ming Hong, Pan-Chyr Yang

Open access · goldAbstract read
In one paragraph

Article in EMBO molecular medicine, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 74 papers.

0numbers the graph read from it
0cells of the map it votes in
74citing papers in PubMed
3.9field-weighted citation impact, top 6% 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

74 citing papers in PubMed, 115 citations in OpenAlex.

  1. Review
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  4. [European journal of nuclear medicine and molecular imaging · 2026
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  5. Quantitative Assays for TROP2 Measurement in Breast Cancer and Comparison to H-Score.Applied immunohistochemistry & molecular morphology : AIMM · 2026
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  13. The Mode of Action and Clinical Outcomes of Sacituzumab Govitecan in Solid Tumors.Clinical cancer research : an official journal of the American Association for Cancer Research · 2025
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14 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

9 authors at 4 institutions in 1 country.

Jau-Chen LinDepartment of Respiratory Therapy, Fu-Jen Catholic University, New Taipei, Taiwan.
Yi-Ying Wu
Jing-Yi Wu
Tzu-Chieh Lin
Chen-Tu Wu
Yih-Leong Chang
Yuh-Shan Jou
Tse-Ming Hong
Pan-Chyr Yang
Institute of Biomedical Sciences, Academia Sinica · TWNational Cheng Kung University · TWNational Taiwan University Hospital · TWFu Jen Catholic University · TW

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Trop-2, a cell surface glycoprotein, contains both extracellular epidermal growth factor-like and thyroglobulin type-1 repeat domains. Low TROP2 expression was observed in lung adenocarcinoma tissues as compared with their normal counterparts. The lack of expression could be due to either the loss of heterozygosity (LOH) or hypermethylation of the CpG island DNA of TROP2 upstream promoter region as confirmed by bisulphite sequencing and methylation-specific (MS) polymerase chain reaction (PCR). 5-Aza-2'-deoxycytidine treatment on lung cancer cell (CL) lines, CL1-5 and A549, reversed the hypermethylation status and elevated both TROP2 mRNA and protein expression levels. Enforced expression of TROP2 in the lung CL line H1299 reduced AKT as well as ERK activation and suppressed cell proliferation and colony formation. Conversely, silencing TROP2 with shRNA transfection in the less efficiently tumour-forming cell line H322M enhanced AKT activation and increased tumour growth. Trop-2 could attenuate IGF-1R signalling-mediated AKT/β-catenin and ERK activation through a direct binding of IGF1. In conclusion, inactivation of TROP2 due to LOH or by DNA methylation may play an important role in lung cancer tumourigenicity through losing its suppressive effect on IGF-1R signalling and tumour growth.

Indexed as

Epigenesis, GeneticGene Expression RegulationSignal TransductionAdenocarcinomaAdenocarcinoma of LungAgedAnimalsAntigens, NeoplasmAzacitidineBase SequenceCell Adhesion MoleculesCell Line, TumorDecitabineDisease Models, AnimalFemaleGene ExpressionAntigens, NeoplasmAzacitidineCell Adhesion MoleculesDecitabineReceptor, IGF Type 1TACSTD2 protein, human

Identifiers

PMID22419550
PMCPMC3443948
OpenAlexW2155860096

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.