Platycodin D induced apoptosis and autophagy in PC-12 cells through mitochondrial dysfunction pathway

Area of Science:

• Pharmacology
• Molecular Biology
• Cell Biology

Background:

• Platycodin D is a natural compound found in Platycodon grandiflorus.
• Cancer remains a leading cause of mortality worldwide, necessitating novel therapeutic strategies.

Purpose of the Study:

• To investigate the in vitro cytotoxicity of platycodin D.
• To elucidate the mechanisms underlying platycodin D-induced cell death in cancer cell lines.

Main Methods:

• In vitro cytotoxicity assays were performed on human cancer cell lines (PC-12, SGC-7901, BEL-7402, HeLa, A549).
• Apoptosis, reactive oxygen species (ROS) levels, mitochondrial membrane potential, cell cycle, and protein expression were analyzed.

Main Results:

• Platycodin D demonstrated significant cytotoxicity against PC-12 cells (IC50 = 13.5±1.2μM).
• It induced apoptosis, cell cycle arrest at G0/G1 phase, and autophagy in PC-12 cells.
• Platycodin D triggered ROS generation, decreased mitochondrial membrane potential, and modulated Bcl-2 family protein expression.

Conclusions:

• Platycodin D induces apoptosis in PC-12 cells via a ROS-mediated mitochondrial dysfunction pathway.
• The findings suggest platycodin D as a potential chemotherapeutic agent.