Anticancer Potential of Biogenic Silver Nanoparticles: A Mechanistic Study

Area of Science:

• Nanotechnology
• Biotechnology
• Oncology

Background:

• Cancer poses a significant global health challenge, necessitating novel therapeutic strategies.
• Nanoparticle-based treatments offer a promising avenue for advanced cancer therapy.
• Silver nanoparticles (AgNPs) are being explored for their potential anticancer properties.

Purpose of the Study:

• To synthesize silver nanoparticles (AgNPs) using a plant extract (Heliotropium bacciferum).
• To evaluate the anticancer and antimetastasis potential of biosynthesized AgNPs against breast (MCF-7) and colorectal (HCT-116) cancer models.
• To investigate the underlying mechanisms of AgNP-induced cancer cell death.

Main Methods:

• Biosynthesis of AgNPs using Heliotropium bacciferum plant extract and AgNO3.
• Characterization of AgNPs using spectroscopy and microscopy (average size ~15 nm).
• In vitro evaluation of anticancer activity via MTT, scratch, and comet assays; apoptosis gene expression analysis (p53, Bax, caspase-3, BCl-2) using RT-PCR; reactive oxygen species (ROS) production measurement.

Main Results:

• Biosynthesized AgNPs demonstrated significant anticancer effects with IC50 values of 5.44 µg/mL (MCF-7) and 9.54 µg/mL (HCT-116).
• AgNPs inhibited cancer cell migration in a concentration-dependent manner.
• Treatment with AgNPs induced significant ROS production (150-250% increase) and modulated the expression of apoptotic and antiapoptotic genes, indicating ROS-mediated cell death.

Conclusions:

• Biogenic synthesis of AgNPs using plant extracts is a viable and eco-friendly approach for producing anticancer agents.
• Biosynthesized AgNPs exhibit potent anticancer and antimetastasis effects against breast and colorectal cancer cell lines.
• The findings suggest that AgNPs represent a promising therapeutic candidate for cancer treatment, primarily through ROS-mediated apoptosis.