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Understanding of cell death induced by the constituents of Taxus yunnanensis wood
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Understanding of cell death induced by the constituents of Taxus yunnanensis wood
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Journal Article
Understanding of cell death induced by the constituents of Taxus yunnanensis wood
2022
Overview
The ethanol extract from the wood of
Taxus Yunnanensis
(TY) induced apoptosis in all cancer cell lines tested, which was mainly due to activation of an extrinsic pathway in human colon cancer DLD-1 cells. The extrinsic pathway was activated by the upregulation of the expression levels of Fas and TRAIL/DR5, which led to the activation of caspase-8. Of note, the machinery of this increase in expression was promoted by the upregulation of MIR32a expression, which silenced MIR34a-targeting E2F3 transcription factor. Furthermore, ectopic expression of MIR32a or siR-E2F3 silencing
E2F3
increased Fas and TRAIL/DR5 expression. Thus, the extract activated the extrinsic pathway through the MIR34a/E2F3 axis, resulting in the autocrine and paracrine release of TRAIL, and upregulated expression of death receptors Fas and DR5 in the treated DLD-1 cells, which were functionally validated by Fas immunocytochemistry, and using anti-Fas and anti-TRAIL antibodies, respectively. In vivo, TY showed significant anti-tumor effects on xenografted and syngeneic model mice. The extract may also aid in chemoprevention by selectively making marked tumor cells susceptible to the tumor immunosurveillance system.
Publisher
Springer Science and Business Media LLC,Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 631/337
/ 631/67
/ 631/80
/ Animals
/ Ethanol
/ Humanities and Social Sciences
/ Medicine
/ Membrane Glycoproteins - metabolism
/ Mice
/ Plant Extracts - pharmacology
/ Proteins
/ Q
/ R
/ Receptors, TNF-Related Apoptosis-Inducing Ligand
/ Receptors, TNF-Related Apoptosis-Inducing Ligand - metabolism
/ Science
/ Taxus
/ TNF-Related Apoptosis-Inducing Ligand
/ TNF-Related Apoptosis-Inducing Ligand - pharmacology
/ Wood
