Molecular mechanism underlying hesperetin-induced apoptosis by in silico analysis and in prostate cancer PC-3 cells

Area of Science:

• Molecular Biology
• Pharmacology
• Cancer Research

Background:

• Hesperetin, a natural flavonoid, is being investigated for its potential therapeutic properties.
• Apoptosis, or programmed cell death, is a critical process in cancer development and treatment.
• Nuclear factor-kappa B (NF-κB) is a key regulator of inflammation and cell survival, often dysregulated in cancer.

Purpose of the Study:

• To elucidate the molecular mechanisms by which hesperetin induces apoptosis.
• To investigate the interaction between hesperetin and key proteins involved in apoptosis and NF-κB signaling.
• To evaluate the efficacy of hesperetin in inhibiting prostate cancer cell growth in vitro.

Main Methods:

• In silico molecular docking using Schrodinger suite to analyze hesperetin's binding affinity with NF-κB, BAX, BAD, BCL2, and BCLXL.
• In vitro studies using the human prostate cancer PC-3 cell line.
• MTT assays to assess cell proliferation and viability.
• Quantitative real-time PCR and Western blotting to analyze gene and protein expression of apoptotic markers.

Main Results:

• Hesperetin demonstrated high-affinity binding to NF-κB, suggesting a key inhibitory interaction.
• Hesperetin significantly reduced PC-3 cell proliferation with IC50 values of 90 μM at 24h and 40 μM at 48h.
• Hesperetin downregulated the anti-apoptotic gene BCLXL and upregulated pro-apoptotic genes BAD and BAX at both mRNA and protein levels.

Conclusions:

• Hesperetin effectively induces apoptosis in prostate cancer cells.
• The mechanism involves the inhibition of NF-κB signaling pathway.
• Hesperetin's ability to modulate apoptotic gene expression supports its potential as an anti-cancer agent.