Crude Garlic Extract Inhibits Cell Proliferation and Induces Cell Cycle Arrest and Apoptosis of Cancer Cells In Vitro

Area of Science:

• Oncology
• Pharmacology
• Cell Biology

Background:

• Garlic extracts possess historical medicinal uses, including antimicrobial, hypoglycemic, and lipid-lowering effects.
• Lipid bioactive compounds in garlic have been recognized for their therapeutic potential.

Purpose of the Study:

• To investigate the anti-proliferative effects of crude garlic extract (CGE) on human breast, prostate, hepatic, and colon cancer cell lines.
• To evaluate the impact of CGE on mouse macrophage cell lines, a novel area of study.

Main Methods:

• Human cancer cell lines (Hep-G2, Caco-2, PC-3, MCF-7) and mouse macrophage cells (TIB-71) were cultured.
• Cells were treated with varying concentrations of CGE (0.125-1 μg/mL) for 72 hours.
• Cell proliferation, cell cycle arrest, and caspase activity were assessed.

Main Results:

• CGE significantly inhibited proliferation in Hep-G2, MCF-7, TIB-71, and PC-3 cells (80-90%).
• Caco-2 cells showed moderate inhibition (40-55%), but co-culture with TIB-71 cells enhanced Caco-2 inhibition to 90%.
• CGE induced cell cycle arrest and a fourfold increase in caspase activity (apoptosis) in PC-3 cells.

Conclusions:

• Crude garlic extract exhibits potent anticancer activity against multiple human cancer cell lines.
• Lipid bioactive compounds within CGE are promising candidates for novel anticancer agent development.
• CGE's mechanism involves inducing apoptosis and cell cycle arrest, particularly in prostate cancer cells.