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Vitamin E

Targeting cancer stem cells

Study: Vitamin E δ-tocotrienol significantly inhibited the pancreatic tumor growth [tumor volume (50%) and weight (60%)] and metastasis in the liver and lung, CSCs spheroid formation, migration and invasion compared to control. δ-tocotrienol induced apoptosis (PARP1 cleavage and Bax expression) compared to control.

… these vitamin E forms and metabolites directly target cancer cells and cancer stem cells (CSCs) by promoting apoptosis, antiangiogenesis, and antiproliferation partially via modulating sphingolipids, epigenetic events, and other signaling pathways.

Study: VEDT [δ-tocotrienol, a natural form of vitamin E] (50 μM) inhibited self-renewal (spheroid formation) of stem cells… In summary, we found that natural VEDT inhibits pancreatic cancer metastasis..

Study: …the vitamin E derivative δ-TT (but not vemurafenib) specifically targets melanoma CSCs, as demonstrated by its ability to significantly impair both the formation and the growth of melanospheres…These data demonstrate that δ-TT exerts its antitumor activity by targeting the CSC subpopulation of A375 melanoma cells and might represent a novel chemopreventive/therapeutic strategy against melanoma.

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