<?xml version="1.0" encoding="UTF-8"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-10-28T02:56:27Z</responseDate><request verb="GetRecord" identifier="oai:kostu-rdlopen.rawdatalibrary.net:kostu/10654" metadataPrefix="oai_dc">https://kostu-rdlopen.rawdatalibrary.net/oai/request</request><GetRecord><record><header><identifier>oai:kostu-rdlopen.rawdatalibrary.net:kostu/10654</identifier><datestamp>2026-10-27T23:53:23Z</datestamp><setSpec>openaire</setSpec><setSpec>driver</setSpec><setSpec>com_kostu_10000</setSpec><setSpec>col_kostu_10001</setSpec><setSpec>com_kostu_10007</setSpec><setSpec>col_kostu_10059</setSpec></header><metadata><oai_dc:dc xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"><dc:title>Tamoxifen-Based Dimers: Design, Synthesis, Cell Viability Evaluation on Breast Cancer Cells, and Computational Insights</dc:title><dc:creator>Ertugrul, Berrak</dc:creator><dc:creator>Aytatli, Abdulmelik</dc:creator><dc:creator>Karatas, Omer Faruk</dc:creator><dc:creator>Essiz, Selcuk</dc:creator><dc:creator>Aksakal, Fatma</dc:creator><dc:creator>Saracoglu, Nurullah</dc:creator><dc:subject>breast cancer</dc:subject><dc:subject>density functional theory</dc:subject><dc:subject>dimeric compounds</dc:subject><dc:subject>drug resistance</dc:subject><dc:subject>molecular docking</dc:subject><dc:subject>selective estrogen receptor modulators (SERMs)</dc:subject><dc:subject>tamoxifen</dc:subject><dc:description>Tamoxifen (TMX) resistance presents a significant challenge in the treatment of ER+ breast cancer. In this study, four novel tamoxifen-based dimers were synthesized and evaluated for their antitumor activities. Among these, (Z,Z)-1 exhibited potent antiproliferative effects in ER+ cells, demonstrating selective toxicity toward cancer cells over normal cells. (Z,Z)-1 significantly outperformed tamoxifen with IC50 values of 9.18 μM (24 h) and 6.86 μM (48 h) against MCF-7 cells. Additionally, it showed greater selectivity toward ER+ breast cancer cells compared with both triple-negative cancer cells and non-cancerous cells. Mechanistic studies indicated that (Z,Z)-1 induces apoptosis in MCF-7 cells through a cell-cycle-independent mechanism, unlike TMX, which arrests cells at the G0/G1 phase. These findings suggest that (Z,Z)-1 may be a promising candidate for further development as an alternative to tamoxifen therapy in ER+ breast cancer treatment. The docking studies revealed that (Z,Z)-1 exhibits the strong binding affinity to ERα, highlighting its potential as a promising therapeutic candidate for ER+ breast cancer treatment.</dc:description><dc:publisher>John Wiley and Sons Inc</dc:publisher><dc:date>2026</dc:date><dc:type>Article</dc:type><dc:identifier>https://rdlopen.rawdatalibrary.net/r/kostu/10654</dc:identifier><dc:identifier>https://doi.org/10.1002/ardp.70260</dc:identifier><dc:identifier>0365-6233</dc:identifier><dc:language>en</dc:language><dc:relation>Archiv der Pharmazie</dc:relation><dc:rights>info:eu-repo/semantics/openAccess</dc:rights><dc:type>info:eu-repo/semantics/article</dc:type><dc:identifier>https://kostu-rdlopen.rawdatalibrary.net/tr/items/kostu/10654</dc:identifier></oai_dc:dc></metadata></record></GetRecord></OAI-PMH>