tocopherol/breast neoplasms

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Plasma carotenoids, tocopherols, retinol and breast cancer risk: results from the Shanghai Women Health Study (SWHS).

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Evidence from some previous studies suggests that lipophilic antioxidants, particularly carotenoids, may reduce the risk of breast cancer. We prospectively investigated the associations of plasma levels of tocopherols, retinol, carotenoids with the risk of developing breast cancer among Chinese

Carotenoids, alpha-tocopherols, and retinol in plasma and breast cancer risk in northern Sweden.

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OBJECTIVE Using a nested case-referent design we evaluated the relationship between plasma levels of six carotenoids, alpha-tocopherol, and retinol, sampled before diagnosis, and later breast cancer risk. METHODS In total, 201 cases and 290 referents were selected from three population-based cohorts

Plasma carotenoids, retinol, and tocopherols and risk of breast cancer.

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The roles of carotenoids, retinol, and tocopherols in breast cancer etiology have been inconclusive. The authors prospectively assessed the relations between plasma alpha-carotene, beta-carotene, beta-cryptoxanthin, lycopene, lutein/zeaxanthin, retinol, alpha-tocopherol, and gamma-tocopherol and

Prospective study of carotenoids, tocopherols, and retinoid concentrations and the risk of breast cancer.

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Previous prospective studies have raised the possibility that the antioxidantproperties of carotenoids and vitamin E (alpha-tocopherol) and the role of vitamin A (retinol) in cellular differentiation may be associated with a reduced risk of subsequent breast cancer. To investigate the association

Plasma carotenoids, retinol, and tocopherols and postmenopausal breast cancer risk in the Multiethnic Cohort Study: a nested case-control study.

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BACKGROUND Assessments by the handful of prospective studies of the association of serum antioxidants and breast cancer risk have yielded inconsistent results. This multiethnic nested case-control study sought to examine the association of plasma carotenoids, retinol, and tocopherols with

The application of 19F magnetic resonance ex vivo imaging of three-dimensional cultured breast cancer cells to study the effect of delta-tocopherol.

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The aim of this study was to determine the role of delta-tocopherol in breast cancer cell growth ex vivo. Human gland mammary adenocarcinoma (MCF-7) and human T-lymphoblastoid (CEM) cells were cultured in the presence of delta-tocopherol at various concentrations (0-750 microM) for 5 days. We have

Betulinic acid-induced cytotoxicity in human breast tumor cell lines MCF-7 and T47D and its modification by tocopherol.

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Betulinic acid (BA) has been shown to cause apoptosis in neuroblastoma and melanoma cell lines. We evaluated the cytotoxicity of BA in two breast cancer cell lines MCF-7 and T47D differing in their p53 status. Treatment with BA resulted in a dose dependent inhibition of cell proliferation and

Involvement of de novo ceramide synthesis in gamma-tocopherol and gamma-tocotrienol-induced apoptosis in human breast cancer cells.

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METHODS This study further examines mechanisms involved in the pro-apoptotic action of gamma-tocopherol (γT) and gamma-tocotrienol (γT3) in human breast cancer cell lines. RESULTS γT upregulates phospho-JNK (pJNK), CCAAT/enhancer-binding protein homologous protein (CHOP), and death receptor-5 (DR5)

Erythrocyte alpha-tocopherol in breast cancer patients treated with letrozol.

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In an earlier study, we have observed an increase of alpha-tocopherol in breast cancer patients treated with third-generation aromatase inhibitors that was related to tamoxifen withdrawal. We report here the results of measurement of alpha-tocopherol in erythrocytes and alpha-tocopherol/cholesterol

Does lack of tocopherols and tocotrienols put women at increased risk of breast cancer?

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Breast cancer is the leading site of new cancers in women and the second leading cause (after lung cancer) of cancer mortality in women. Observational studies that have collected data for dietary exposure to alpha-tocopherol with or without the other related tocopherols and tocotrienols have

Alpha-tocopherol and hydroperoxide content in breast adipose tissue from patients with breast tumors.

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The study of the relationship between dietary intake of vitamin E and the risk of breast cancer has not yielded definite conclusions with respect to causality, possibly due to methodological issues inherent to nutritional epidemiology. To avoid the pitfalls of dietary recalls, alpha-tocopherol

No evidence of association between breast cancer risk and dietary carotenoids, retinols, vitamin C and tocopherols in Southwestern Hispanic and non-Hispanic White women.

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OBJECTIVE The effects of dietary intake of antioxidant vitamins on breast cancer risk are inconclusive. Moreover, little is known as to whether associations differ between non-Hispanic White (NHW) and Hispanic women. We assessed the associations of the dietary intake of antioxidant vitamins commonly

Bioflavonoid Fisetin Loaded α-Tocopherol-Poly(lactic acid)-Based Polymeric Micelles for Enhanced Anticancer Efficacy in Breast Cancers.

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In this study, tocopherol based polymeric micelles were successfully prepared to enhance the anticancer effect of fisetin (FIS) in breast cancer cells. The drug-loaded carrier was characterized in terms of physicochemical and in vivo parameters. Compared to FIS, FIS-TPN showed higher cellular uptake

Gamma Tocopherol Reduced Chemotherapeutic-Induced ROS in an Ovarian Granulosa Cell Line, But Not in Breast Cancer Cell Lines In Vitro.

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Doxorubicin and cyclophosphamide are used to treat breast cancer, but they also cause infertility through off-target cytotoxicity towards proliferating granulosa cells that surround eggs. Each chemotherapeutic generates reactive oxygen species (ROS) but the effects of the combination, or the

Retinoids, carotenoids, and tocopherols in breast adipose tissue and serum of benign breast disease and breast cancer patients.

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Various retinoic acid (RA) isomers (all-trans, 13-cis, 11-cis, and 9-cis) as well as retinol, carotenoids, and tocopherol concentrations were determined in both serum and breast adipose tissue of 22 benign breast disease patients and 52 breast cancer patients categorized into 4 stages by malignancy.

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