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Abstract Title:

HIF-1α/VEGF signaling-mediated epithelial-mesenchymal transition and angiogenesis is critically involved in anti-metastasis effect of luteolin in melanoma cells.

Abstract Source:

Phytother Res. 2019 Jan 17. Epub 2019 Jan 17. PMID: 30653763

Abstract Author(s):

Chunyu Li, Qi Wang, Shen Shen, Xiaolu Wei, Guoxia Li

Article Affiliation:

Chunyu Li

Abstract:

Tumor metastasis is still the leading cause of melanoma mortality. Luteolin, a natural flavonoid, is found in fruits, vegetables, and medicinal herbs. The pharmacological action and mechanism of luteolin on the metastasis of melanoma remain elusive. In this study, we investigated the effect of luteolin on A375 and B16-F10 cell viability, migration, invasion, adhesion, and tube formation of human umbilical vein endothelial cells. Epithelial-mesenchymal transition (EMT) markers and pivotal molecules in HIF-1α/VEGF signaling expression were analysed using western blot assays or quantitative real-time polymerase chain reaction. Results showed that luteolin inhibits cellular proliferation in A375 and B16-F10 melanoma cells in a time-dependent and concentration-dependent manner. Luteolin significantly inhibited the migratory, invasive, adhesive, and tube-forming potential of highly metastatic A375 and B16-F10 melanoma cells or human umbilical vein endothelial cells at sub-ICconcentrations, where no significant cytotoxicity was observed. Luteolin effectively suppressed EMT by increased E-cadherin and decreased N-cadherin and vimentin expression both in mRNA and protein levels. Further, luteolin exerted its anti-metastasis activity through decreasing the p-Akt, HIF-1α, VEGF-A, p-VEGFR-2, MMP-2, and MMP-9 proteins expression. Overall, our findings first time suggests that HIF-1α/VEGF signaling-mediated EMT and angiogenesis is critically involved in anti-metastasis effect of luteolin as a potential therapeutic candidate for melanoma.

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