Apigenin Sensitizes Huh-7 Human Hepatocellular Carcinoma Cells to TRAIL-induced Apoptosis

Area of Science:

• Oncology
• Molecular Biology
• Cell Biology

Background:

• TNF-related apoptosis-inducing ligand (TRAIL) shows selective cancer cell cytotoxicity.
• TRAIL resistance in some cancer cells necessitates novel therapeutic strategies.
• Apigenin is a natural compound with potential anti-cancer properties.

Purpose of the Study:

• To investigate the synergistic apoptotic effect of apigenin combined with TRAIL in Huh-7 cells.
• To determine if apigenin can overcome TRAIL resistance in cancer cells.

Main Methods:

• Huh-7 cells were treated with TRAIL alone, apigenin alone, or a combination of both.
• Apoptosis was assessed using Annexin V/PI flow cytometry and Western blot analysis for cleaved PARP.
• Activation of intrinsic and extrinsic apoptotic pathways was evaluated by caspase activation and Bax/Bcl-2 ratio.

Main Results:

• Combined TRAIL and apigenin treatment significantly inhibited Huh-7 cell growth compared to single agents.
• The combination induced chromatin condensation and poly (ADP-ribose) polymerase (PARP) cleavage.
• Apigenin sensitized cells to TRAIL-induced apoptosis by activating caspases and up-regulating the Bax/Bcl-2 ratio, indicating mitochondrial pathway activation.

Conclusions:

• Apigenin synergistically enhances TRAIL-induced apoptosis in Huh-7 cells.
• The combination therapy effectively overcomes TRAIL resistance by activating both intrinsic and extrinsic apoptotic pathways.
• This combination represents a promising strategy for cancer management.