ArticleJournal of lipid research2015
α-Tocopherols modify the membrane dipole potential leading to modulation of ligand binding by P-glycoprotein.
Article in Journal of lipid research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.
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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
21 citing papers in PubMed, 25 citations in OpenAlex.
- Effects of vitamins A and E on eprinomectin transport in Caco-2 cells.Veterinarni medicina · 2026Article
- The Many Layers of Membrane Biophysics: Environment-Sensitive Fluorophores Report on Structural Organization of Biological Membranes at Various Depths.Analytical chemistry · 2026Article
- Disorder in Order-Related Membrane Biophysical Parameters: An In-Depth Analysis of Di-4-ANEPPDHQ Generalized Polarization.The journal of physical chemistry letters · 2026Article
- Alteration of Lipid Bilayer Electrical Potential by Phytochemicals and Synthetic Analogs: Implications for Cellular Function.Biomolecules · 2026Review
- Differential Regulatory Effects of Cannabinoids and Vitamin E Analogs on Cellular Lipid Homeostasis and Inflammation in Human Macrophages.Antioxidants (Basel, Switzerland) · 2026Article
- Recent Advances in Vitamin E TPGS-Based Organic Nanocarriers for Enhancing the Oral Bioavailability of Active Compounds: A Systematic Review.Pharmaceutics · 2025Review
- Multifunctional hyaluronic acid-based biomimetic/pH-responsive hybrid nanostructured lipid carriers for treating bacterial sepsis.Journal of biomedical science · 2025Article
- Look Beyond Plasma Membrane Biophysics: Revealing Considerable Variability of the Dipole Potential Between Plasma and Organelle Membranes of Living Cells.International journal of molecular sciences · 2025Article
- Clinical, electrophysiological, and histomorphological effects of local coenzyme Q10 and vitamin E use in a rat model of peripheral nerve injury.Acta orthopaedica et traumatologica turcica · 2023Article
- Vitamin E functions by association with a novel binding site on the 67 kDa laminin receptor activating diacylglycerol kinase.The Journal of nutritional biochemistry · 2022Article
- Cyclodextrins: Only Pharmaceutical Excipients or Full-Fledged Drug Candidates?Pharmaceutics · 2022Review
- The Effects of Cholesterol Oxidation on Erythrocyte Plasma Membranes: A Monolayer Study.Membranes · 2022Article
- An ω-3, but Not an ω-6 Polyunsaturated Fatty Acid Decreases Membrane Dipole Potential and Stimulates Endo-Lysosomal Escape of Penetratin.Frontiers in cell and developmental biology · 2021Article
- Modulation and Protection Effects of Antioxidant Compounds against Oxidant Induced Developmental Toxicity in Zebrafish.Antioxidants (Basel, Switzerland) · 2020Article
- The effects of dyslipidaemia and cholesterol modulation on erythrocyte susceptibility to malaria parasite infection.Malaria journal · 2019Article
- Topical Curcumin Nanocarriers are Neuroprotective in Eye Disease.Scientific reports · 2018Article
- Dietary Ingestion of Calories and Micronutrients Modulates the DNA Methylation Profile of Leukocytes from Older Individuals.The journal of nutrition, health & aging · 2018Article
- Assessing anesthetic activity through modulation of the membrane dipole potential.Journal of lipid research · 2017Article
- Topical Coenzyme Q10 demonstrates mitochondrial-mediated neuroprotection in a rodent model of ocular hypertension.Mitochondrion · 2017Article
- The dipole potential correlates with lipid raft markers in the plasma membrane of living cells.Journal of lipid research · 2017Article
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
α-Tocopherol (vitamin E) has attracted considerable attention as a potential protective or palliative agent. In vitro, its free radical-scavenging antioxidant action has been widely demonstrated. In vivo, however, vitamin E treatment exhibits negligible benefits against oxidative stress. α-Tocopherol influences lipid ordering within biological membranes and its derivatives have been suggested to inhibit the multi-drug efflux pump, P-glycoprotein (P-gp). This study employs the fluorescent membrane probe, 1-(3-sulfonatopropyl)-4-[β[2-(di-n-octylamino)-6-naphthyl]vinyl] pyridinium betaine, to investigate whether these effects are connected via influences on the membrane dipole potential (MDP), an intrinsic property of biological membranes previously demonstrated to modulate P-gp activity. α-Tocopherol and its non-free radical-scavenging succinate analog induced similar decreases in the MDP of phosphatidylcholine vesicles. α-Tocopherol succinate also reduced the MDP of T-lymphocytes, subsequently decreasing the binding affinity of saquinavir for P-gp. Additionally, α-tocopherol succinate demonstrated a preference for cholesterol-treated (membrane microdomain enriched) cells over membrane cholesterol-depleted cells. Microdomain disruption via cholesterol depletion decreased saquinavir's affinity for P-gp, potentially implicating these structures in the influence of α-tocopherol succinate on P-gp. This study provides evidence of a microdomain dipole potential-dependent mechanism by which α-tocopherol analogs influence P-gp activity. These findings have implications for the use of α-tocopherol derivatives for drug delivery across biological barriers.
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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.