Evidence map›Paper›PMID 41518394›Full record

ArticleMolecular biology reports2026

The impact of the telomerase inhibitor on the Wnt signaling pathway in breast cancer and breast cancer stem cells.

Pinar Guler, Leila Sabour Takanlou, Maryam Sabour Takanlou, Arman Rostamlou, Cigir Biray Avci

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Article in Molecular biology reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

5 authors.

Pinar GulerMolecular Biology, Max Perutz Labs, University of Vienna, Vienna, Austria.ORCID http://orcid.org/0000-0003-3541-5735
Leila Sabour TakanlouDepartment of Medical Biology, Faculty of Medicine, Ege University, Bornova/Izmir, 35100, Turkey.ORCID http://orcid.org/0000-0002-6361-7150
Maryam Sabour TakanlouDepartment of Medical Biology, Faculty of Medicine, Ege University, Bornova/Izmir, 35100, Turkey.ORCID http://orcid.org/0000-0002-1590-4833
Arman RostamlouDepartment of Medical Biology, Faculty of Medicine, Ege University, Bornova/Izmir, 35100, Turkey.ORCID http://orcid.org/0009-0001-4336-562X
Cigir Biray AvciDepartment of Medical Biology, Faculty of Medicine, Ege University, Bornova/Izmir, 35100, Turkey. cigir.biray@ege.edu.tr.ORCID http://orcid.org/0000-0001-8251-4520

Funding

This work was supported by Ege University under grant number TYL-2022-23721. TYL-2022-23721
6 · The paper itself

Abstract

backgroundBreast cancer remains one of the leading causes of cancer-related mortality in women worldwide. Breast cancer stem cells (BCSCs) contribute to tumor initiation, metastasis, recurrence, and resistance to therapy. The Wnt signaling pathway is a major regulator of stemness properties and is associated with poor clinical outcomes. BIBR1532 is a selective telomerase inhibitor widely used in cancer research due to its ability to inhibit telomerase activity in tumor cells with minimal toxicity in normal tissues. This study aimed to investigate the effects of BIBR1532 on the Wnt signaling pathway in breast cancer cells and BCSCs.

methodsCytotoxicity of BIBR1532 was evaluated in MCF-7 breast cancer cells, MCF10A normal breast epithelial cells, and BCSCs using a 48-hour treatment. IC₅₀ values were calculated, and apoptosis induction was assessed. Changes in the expression of Wnt pathway-related genes following BIBR1532 treatment were analyzed using RT-qPCR.

resultsThe IC₅₀ values of BIBR1532 at 48 h were 35.29 µM for MCF-7, 28.16 µM for MCF10A, and 30.42 µM for the BCSC line. BIBR1532 markedly induced apoptosis in MCF-7 and BCSCs, whereas minimal apoptotic changes were observed in MCF10A cells. RT-qPCR analysis revealed significant modulation of genes in the Wnt signaling pathway: several oncogenic components were downregulated, while multiple tumor-suppressive genes were upregulated. Additionally, expression changes in less-studied Wnt-related genes may provide new insights for future breast cancer research.

conclusionsBIBR1532 exerts selective cytotoxic and pro-apoptotic effects on breast cancer cells and BCSCs and modulates key components of the Wnt signaling pathway. These findings suggest that telomerase inhibition may influence stemness-related signaling in breast cancer.

Indexed as

AminobenzoatesBreast NeoplasmsNaphthalenesNeoplastic Stem CellsTelomeraseWnt Signaling PathwayApoptosisCell Line, TumorCell ProliferationFemaleGene Expression Regulation, NeoplasticHumansMCF-7 CellsAminobenzoatesBIBR 1532NaphthalenesTelomeraseApoptosisBIBR1532Breast cancerCancer stem cellsProliferationWnt signaling

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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.