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Acevaltrate promotes apoptosis and inhibits proliferation by suppressing HIF-1α accumulation in cancer cells.
- Source :
-
International Immunopharmacology . May2024, Vol. 133, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- • We identified acevaltrate as an inhibitor of hypoxia-inducible factor-1α accumulation from the roots of Valeriana glechomifolia. • Acevaltrate inhibits HIF-1α protein synthesis and promotes degradation of HIF-1α protein. • Acevaltrate inhibits HIF-1α protein expression through suppression of mTOR/p70S6K/4E-BP1 signaling pathway. • Acevaltrate promotes apoptosis and inhibits proliferation by inhibiting HIF-1α. • Acevaltrate could be a valuable candidate for the intervention of hypoxia-inducible factor-1α-dependent anticancer activity. Acevaltrate is a natural product isolated from the roots of Valeriana glechomifolia F.G.Mey. (Valerianaceae) and has been shown to exhibit anti-cancer activity. However, the mechanism by which acevaltrate inhibits tumor growth is not fully understood. We here demonstrated the effect of acevaltrate on hypoxia-inducible factor-1α (HIF-1α) expression. Acevaltrate showed a potent inhibitory activity against HIF-1α induced by hypoxia in various cancer cells. This compound markedly decreased the hypoxia-induced accumulation of HIF-1α protein dose-dependently. Further analysis revealed that acevaltrate inhibited HIF-1α protein synthesis and promoted degradation of HIF-1α protein, without affecting the expression level of HIF-1α mRNA. Moreover, the phosphorylation levels of mammalian target of rapamycin (mTOR), ribosomal protein S6 kinase (p70S6K), and eIF4E binding protein-1 (4E-BP1) were significantly suppressed by acevaltrate. In addition, acevaltrate promoted apoptosis and inhibited proliferation, which was potentially mediated by suppression of HIF-1α. We also found that acevaltrate administration inhibited tumor growth in mouse xenograft model. Taken together, these results suggested that acevaltrate was a potent inhibitor of HIF-1α and provided a new insight into the mechanisms of acevaltrate against cancers. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CANCER cells
*APOPTOSIS
*PROTEIN synthesis
*GENE expression
*RIBOSOMAL proteins
Subjects
Details
- Language :
- English
- ISSN :
- 15675769
- Volume :
- 133
- Database :
- Academic Search Index
- Journal :
- International Immunopharmacology
- Publication Type :
- Academic Journal
- Accession number :
- 177086527
- Full Text :
- https://doi.org/10.1016/j.intimp.2024.112066