ArticleMolecular biology reports2022
DLGAP1-AS2 promotes estrogen receptor signalling and confers tamoxifen resistance in breast cancer.
Article in Molecular biology reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 16 citations in OpenAlex.
- Long non-coding RNAs as modulators of endocrine therapy response in hormone receptor-positive breast cancer.Molecular biology reports · 2026Review
- The role of UPR-related long noncoding RNAs in development of endocrine resistance in breast cancer.International journal of cancer · 2025Review
- Real-world assessment of thromboembolic risk associated with tamoxifen.Scientific reports · 2025Article
- Improvement of carboplatin chemosensitivity in lung cancer cells by siRNA-mediated downregulation of DLGAP1-AS2 expression.Scientific reports · 2025Article
- Long Non-Coding RNAs, Nuclear Receptors and Their Cross-Talks in Cancer-Implications and Perspectives.Cancers · 2024Review
- Endocrine nuclear receptors and long non‑coding RNAs reciprocal regulation in cancer (Review).International journal of oncology · 2024Review
- The knockdown of lncRNA DLGAP1-AS2 suppresses osteosarcoma progression by inhibiting aerobic glycolysis via the miR-451a/HK2 axis.Cancer science · 2023Article
- Article
- Long noncoding RNA DLGAP1-AS2 promotes tumorigenesis and metastasis by regulating the Trim21/ELOA/LHPP axis in colorectal cancer.Molecular cancer · 2022Article
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Authors and funding
8 authors at 1 institution in 1 country.
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Abstract
backgroundTamoxifen is a first-line endocrine agent and is often used to treat estrogen receptor-positive (ER+) breast cancer. Unfortunately, approximately 30-40% of patients who received tamoxifen therapy experience recurrence or progression to a fatal advanced stage due to tamoxifen resistance. However, the mechanisms of tamoxifen resistance remain unclear.
methodsThe expression of lncRNA DLGAP1 antisense RNA 2 (DLGAP1-AS2) was detected by qPCR. The effect of DLGAP1-AS2 on tamoxifen resistance was evaluated by MTT, colony formation, TUNEL and flow cytometric assays. The mechanisms by which DLGAP1-AS2 regulates tamoxifen resistance were investigated through qPCR, RNA pull-down assays and RNA immunoprecipitation (RIP) assays.
resultsOur results showed that DLGAP1-AS2 is significantly upregulated in breast cancer and that tamoxifen can induce DLGAP1-AS2 expression. Further investigation suggested that upregulation of DLGAP1-AS2 can increase cell viability and inhibit apoptosis, while downregulation of DLGAP1-AS2 results in the opposite effects. Mechanistically, DLGAP1-AS2 can bind to the AFF3 protein to inhibit its degradation, which further promotes ER signalling.
conclusionsOur research clarified that DLGAP1-AS2 promotes ER signalling to induce tamoxifen resistance and that targeting DLGAP1-AS2 might be a promising strategy to overcome tamoxifen resistance in breast cancer.
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