ArticleNucleic acids research2009
Estradiol downregulates miR-21 expression and increases miR-21 target gene expression in MCF-7 breast cancer cells.
Article in Nucleic acids research, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 182 papers, 1 of them a synthesis that pooled it.
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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.
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.
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Who cites it
182 citing papers in PubMed, 1 synthesis or guideline pooled it, 390 citations in OpenAlex.
- Pooled it
- Development and validation of a gene expression score that predicts response to fulvestrant in breast cancer patients.PloS one · 2014Trial
- Co-treatment of Colchicine and Rosiglitazone synergistically inhibits cytokine-driven inflammation and modulates the related hsa-miRNA26a-5p, hsa-miRNA21-5p, and STAT3 expression in non-small cell lung cancer.Naunyn-Schmiedeberg's archives of pharmacology · 2026Article
- MicroRNA-21 is a potential therapeutic agent targetingMolecular therapy. Nucleic acids · 2025Article
- Exploring the role of miR-221/222 in gastrointestinal cancers: implications for innovative therapeutic strategies.Cancer cell international · 2025Review
- Text Mining Strategy Identifies Gene Networks Under Control of miR-21 in Breast Cancer Development.Cancer medicine · 2025Article
- Role of miRNAs in Apoptosis Pathways of Immune Cells in Systemic Lupus Erythematosus.Immunity, inflammation and disease · 2025Review
- miRNA-21-5p targeting PTEN to regulate PI3K/Akt/mTOR pathway in retinal pigment epithelial cell photodamage.International journal of ophthalmology · 2025Article
- Metabolic stress in space: ROS-induced mutations in mice hint at a new path to cancer.Redox biology · 2024Article
- Sparstolonin B Reduces Estrogen-Dependent Proliferation in Cancer Cells: Possible Role of Ceramide and PI3K/AKT/mTOR Inhibition.Pharmaceuticals (Basel, Switzerland) · 2024Article
- MicroRNAs regulate the vicious cycle of vascular calcification-osteoporosis in postmenopausal women.Molecular biology reports · 2024Review
- The role of telocytes and miR-21-5p in tumorigenicity and metastasis of breast cancer stem cells.Molecular biology reports · 2024Article
- Trials and Tribulations of MicroRNA Therapeutics.International journal of molecular sciences · 2024Review
- Interaction of estradiol and renin-angiotensin system with microRNAs-21 and -29 in renal fibrosis: focus on TGF-β/smad signaling pathway.Molecular biology reports · 2024Review
- Therapeutic Potential of Alpha-pinene in Breast Cancer: Targeting miR-21 and PTEN Gene Expression.Galen medical journal · 2024Article
- MicroRNA-21 in urologic cancers: from molecular mechanisms to clinical implications.Frontiers in cell and developmental biology · 2024Review
- A novel lupene derivative from Thymus capitatus possesses an apoptosis-inducing effect via Let-7 miRNA/Cyclin D1/VEGF cascade in the A549 cell line.BMC complementary medicine and therapies · 2023Article
- Article
- A Focused Review of Ras Guanine Nucleotide-Releasing Protein 1 in Immune Cells and Cancer.International journal of molecular sciences · 2023Review
- Article
122 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 1 institution in 1 country.
Funding
Abstract
Select changes in microRNA (miRNA) expression correlate with estrogen receptor alpha (ER alpha) expression in breast tumors. miR-21 is higher in ER alpha positive than negative tumors, but no one has examined how estradiol (E(2)) regulates miR-21 in breast cancer cells. Here we report that E(2) inhibits miR-21 expression in MCF-7 human breast cancer cells. The E(2)-induced reduction in miR-21 was inhibited by 4-hydroxytamoxifen (4-OHT), ICI 182 780 (Faslodex), and siRNA ER alpha indicating that the suppression is ER alpha-mediated. ER alpha and ER beta agonists PPT and DPN inhibited and 4-OHT increased miR-21 expression. E(2) increased luciferase activity from reporters containing the miR-21 recognition elements from the 3'-UTRs of miR-21 target genes, corroborating that E(2) represses miR-21 expression resulting in a loss of target gene suppression. The E(2)-mediated decrease in miR-21 correlated with increased protein expression of endogenous miR-21-targets Pdcd4, PTEN and Bcl-2. siRNA knockdown of ER alpha blocked the E(2)-induced increase in Pdcd4, PTEN and Bcl-2. Transfection of MCF-7 cells with antisense (AS) to miR-21 mimicked the E(2)-induced increase in Pdcd4, PTEN and Bcl-2. These results are the first to demonstrate that E(2) represses the expression of an oncogenic miRNA, miR-21, by activating estrogen receptor in MCF-7 cells.
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Registered trials
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.