Mangiferin inhibits tumor necrosis factor-α-induced matrix metalloproteinase-9 expression and cellular invasion by...

Area of Science:

• Oncology
• Molecular Biology
• Pharmacology

Background:

• Prostate cancer cell invasion is a critical factor in metastasis.
• Metalloproteinase-9 (MMP-9) plays a key role in tumor cell invasion.
• Nuclear factor-kappa B (NF-κB) signaling is implicated in promoting MMP-9 expression and cancer progression.

Purpose of the Study:

• To investigate the effects of mangiferin on MMP-9 expression and activity in prostate cancer cells.
• To determine if mangiferin can inhibit tumor necrosis factor-alpha (TNF-α)-induced invasion of LNCaP prostate carcinoma cells.
• To elucidate the molecular mechanisms underlying mangiferin's potential anti-invasive effects, focusing on the NF-κB pathway.

Main Methods:

• Reverse-transcription polymerase chain reaction (RT-PCR) and Western blot analysis to assess MMP-9 mRNA and protein levels.
• Zymography to measure MMP-9 enzymatic activity.
• Matrigel invasion assays to quantify cell invasiveness.
• Luciferase reporter assays to evaluate NF-κB transcriptional activity.
• Western blot analysis to examine NF-κB subunit (p65, p50) nuclear translocation.

Main Results:

• Mangiferin significantly reversed TNF-α-induced increases in MMP-9 mRNA and protein expression.
• Mangiferin substantially reduced TNF-α-induced MMP-9 activity.
• Mangiferin significantly inhibited TNF-α-induced invasion of LNCaP cells.
• Mangiferin markedly decreased TNF-α-induced NF-κB luciferase activity.
• Mangiferin suppressed the nuclear translocation of NF-κB subunits p65 and p50.

Conclusions:

• Mangiferin exhibits significant anti-invasive properties against prostate cancer cells.
• Mangiferin's anti-invasive action is mediated through the suppression of NF-κB-dependent MMP-9 expression and activity.
• Mangiferin represents a potential therapeutic agent for inhibiting prostate cancer metastasis.