Evidence map›Paper›PMID 39110274›Full record

ArticleBreast cancer research and treatment2024

FBLN2 is associated with basal cell markers Krt14 and ITGB1 in mouse mammary epithelial cells and has a preferential expression in molecular subtypes of human breast cancer.

Amr Ahmed WalyEldeen, Salwa Sabet, Shady E Anis, Torsten Stein, Ayman M Ibrahim

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In one paragraph

Article in Breast cancer research and treatment, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
–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

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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

11 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Cross-Study Meta-Analysis of Blood Transcriptomes in Type 2 Diabetes.International journal of molecular sciences · 2025
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors.

Amr Ahmed WalyEldeenDepartment of Zoology, Faculty of Science, Cairo University, Giza, 12613, Egypt.
Salwa SabetDepartment of Zoology, Faculty of Science, Cairo University, Giza, 12613, Egypt.
Shady E AnisDepartment of Pathology, Faculty of Medicine, Cairo University, Cairo, 11562, Egypt.
Torsten SteinInstitute of Veterinary Biochemistry, Freie Universität Berlin, 14163, Berlin, Germany.
Ayman M IbrahimDepartment of Zoology, Faculty of Science, Cairo University, Giza, 12613, Egypt. sci_ayman@cu.edu.eg.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundFibulin-2 (FBLN2) is a secreted extracellular matrix (ECM) glycoprotein and has been identified in the mouse mammary gland, in cap cells of terminal end buds (TEBs) during puberty, and around myoepithelial cells during early pregnancy. It is required for basement membrane (BM) integrity in mammary epithelium, and its loss has been associated with human breast cancer invasion. Herein, we attempted to confirm the relevance of FBLN2 to myoepithelial phenotype in mammary epithelium and to assess its expression in molecular subtypes of human breast cancer.

methodsThe relationship between FBLN2 expression and epithelial markers was investigated in pubertal mouse mammary glands and the EpH4 mouse mammary epithelial cell line using immunohistochemistry, immunocytochemistry, and immunoblotting. Human breast cancer mRNA data from the METABRIC and TCGA datasets from Bioportal were analyzed to assess the association of Fbln2 expression with epithelial markers, and with molecular subtypes. Survival curves were generated using data from the METABRIC dataset and the KM databases.

resultsFBLN2 knockdown in mouse mammary epithelial cells was associated with a reduction in KRT14 and an increase in KRT18. Further, TGFβ3 treatment resulted in the upregulation of FBLN2 in vitro. Meta-analyses of human breast cancer datasets from Bioportal showed a higher expression of Fbln2 mRNA in claudin-low, LumA, and normal-like breast cancers compared to LumB, Her2 +, and Basal-like subgroups. Fbln2 mRNA levels were positively associated with mesenchymal markers, myoepithelial markers, and markers of epithelial-mesenchymal transition. Higher expression of Fbln2 mRNA was associated with better prognosis in less advanced breast cancer and this pattern was reversed in more advanced lesions.

conclusionWith further validation, these observations may offer a molecular prognostic tool for human breast cancer for more personalized therapeutic approaches.

Indexed as

Biomarkers, TumorBreast NeoplasmsEpithelial CellsAnimalsCalcium-Binding ProteinsCell Line, TumorExtracellular Matrix ProteinsFemaleGene Expression Regulation, NeoplasticHumansKeratin-14Mammary Glands, AnimalMiceBiomarkers, TumorCalcium-Binding ProteinsExtracellular Matrix ProteinsKeratin-14BasalBreast cancerECMFibulin-2Molecular subtypes

Identifiers

PMID39110274
PMCPMC11522194

What Socratic 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 Socratic graph.