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Juglone exerts antitumor effect in ovarian cancer cells
Fang Fang1, Yingxin Qin2, Ling Qi3
1Department of Immunology, Jilin Medical College, Jilin, Jilin, China.
Objectives:
Juglone is isolated from many species of the Juglandaceae family and used as an anti-viral, anti-bacterial, and anti-tumor therapeutic. Here, we evaluated juglone-induced antitumor effect in ovarian cancer SKOV3 cells.
Materials And Methods:
MTT assay was performed to examine juglone anti-proliferative effect. Cell cycle and apoptosis were studied using flow cytometry in juglone-treated SKOV3 cells. To investigate molecular mechanism of cell cycle and apoptosis, protein expression levels were measured by Western blot analysis of cyclin D1, Bcl-2, Bax, cytochrome c, caspase-9 and caspase-3. To investigate the motility of juglone-treated SKOV3 cell, Matrigel invasion assay was employed to characterize cell invasion. Also, matrix metalloproteinase-2 (MMP-2) expression levels were detected by western blot.
Results:
Juglone significantly inhibited SKOV3 cell proliferation as shown by G0/G1 phase arrest, and this effect was mediated by inactivation of cyclin D1 protein (P<0.05). Juglone induced apoptosis in SKOV3 cell which was accompanied by caspase-9 and caspase-3 activation (P<0.05). Juglone decreased Bcl-2 levels and increased Bax and cytochrome c (Cyt c) levels (P<0.05). Juglone sufficiently inhibited invasion while evidently decreased MMP-2 expression (P<0.05).
Conclusion:
The results suggest that juglone could probably induce apoptosis through mitochondrial pathway and restrained cell invasiveness by decreasing MMP expression.
Insights
Juglone, a natural compound, effectively inhibits ovarian cancer cell proliferation and invasion. It induces apoptosis via the mitochondrial pathway and reduces matrix metalloproteinase-2 (MMP-2) expression, suggesting therapeutic potential.
Area of Science:
- Natural Product Chemistry
- Cancer Biology
- Molecular Pharmacology
Background:
- Juglone, derived from Juglandaceae species, possesses known antiviral, antibacterial, and antitumor properties.
- Ovarian cancer remains a significant health concern, necessitating novel therapeutic strategies.
Purpose of the Study:
- To investigate the antitumor effects of juglone on human ovarian cancer SKOV3 cells.
- To elucidate the molecular mechanisms underlying juglone's anti-cancer activity.
Main Methods:
- Cell proliferation was assessed using MTT assays.
- Cell cycle distribution and apoptosis were analyzed by flow cytometry.
- Protein expression levels (cyclin D1, Bcl-2, Bax, cytochrome c, caspases, MMP-2) were determined via Western blot.
- Cell invasion was evaluated using Matrigel invasion assays.
Main Results:
- Juglone significantly inhibited SKOV3 cell proliferation by inducing G0/G1 phase arrest, linked to cyclin D1 inactivation.
- Juglone triggered apoptosis, evidenced by caspase-9 and caspase-3 activation, and altered Bcl-2/Bax/cytochrome c ratios.
- Juglone suppressed cell invasion and decreased matrix metalloproteinase-2 (MMP-2) expression.
Conclusions:
- Juglone induces apoptosis in ovarian cancer cells through the mitochondrial pathway.
- Juglone restrains cancer cell invasiveness by downregulating MMP expression, highlighting its potential as an ovarian cancer therapeutic.
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