ArticleNutrition research and practice2009
Modulatory effects of alpha- and gamma-tocopherols on 4-hydroxyestradiol induced oxidative stresses in MCF-10A breast epithelial cells.
Article in Nutrition research and practice, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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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.
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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
5 citing papers in PubMed, 11 citations in OpenAlex.
- Sulfur-Containing Heterocyclic Aromatic Hydrocarbons Alter Estrogen Metabolism and Cause DNA Damage and Apoptosis in Granulosa Cells.International journal of molecular sciences · 2025Article
- Exploring the potential of tocopherols: mechanisms of action and perspectives in the prevention and treatment of breast cancer.Medical oncology (Northwood, London, England) · 2024Review
- Discovery of novel PARP1/NRP1 dual-targeting inhibitors with strong antitumor potency.Frontiers in pharmacology · 2024Article
- The effect of vitamin E and selenium combination in repairing fluoride-induced DNA damage to NRK-52E cells.Molecular biology reports · 2020Article
- Cytoprotective effect of γ-tocopherol against tumor necrosis factor α induced cell dysfunction in L929 cells.International journal of molecular medicine · 2011Article
Corrections and comments
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Authors and funding
6 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The elevated level of circulating estradiol increases the risk of breast tumor development. To gain further insight into mechanisms involved in their actions, we investigated the molecular mechanisms of 4-hydroxyestradiol (4-OHE(2)) to initiate and/or promote abnormal cell growth, and of alpha- or gamma-tocopherol to inhibit this process. MCF-10A, human breast epithelial cells were incubated with 0.1 microM 4-OHE(2), either with or without 30 microM tocopherols for 96 h. 4-OHE(2) caused the accumulation of intracellular ROS, while cellular GSH/GSSG ratio and MnSOD protein levels were decreased, indicating that there was an oxidative burden. 4-OHE(2) treatment also changed the levels of DNA repair proteins, BRCA1 and PARP-1. gamma-Tocopherol suppressed the 4-OHE(2)-induced increases in ROS, GSH/GSSG ratio, and MnSOD protein expression, while alpha-tocopherol up-regulated BRCA1 and PARP-1 protein expression. In conclusion, 4-OHE(2) increases oxidative stress reducing the level of proteins related to DNA repair. Tocopherols suppressed oxidative stress by scavenging ROS or up-regulating DNA repair elements.
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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.