Ag/Au Bimetallic Nanoparticles Inhibit Tumor Growth and Prevent Metastasis in a Mouse Model

Area of Science:

• Nanomedicine
• Cancer Research
• Molecular Biology

Background:

• Nanoparticles (NPs) offer novel therapeutic strategies for cancer treatment.
• Targeted delivery of therapeutic agents to tumors is crucial for efficacy and minimizing side effects.

Purpose of the Study:

• To evaluate the antitumor and antimetastatic efficacy of silver-gold-tryptophan nanoparticles (Ag3Au1Trp1:2NPs) in a SCID mouse cancer model.
• To investigate the molecular mechanisms underlying the observed therapeutic effects.

Main Methods:

• Ag3Au1Trp1:2NPs were radiolabeled with Gallium-68 for biodistribution studies.
• Tumor growth was monitored, and metastatic potential was assessed in lung and liver tissues.
• Caspase-3 and TRAIL expression levels were analyzed using real-time PCR and Western blot.

Main Results:

• Ag3Au1Trp1:2NPs exhibited rapid accumulation at tumor sites.
• The highest dose of Ag3Au1Trp1:2NPs reduced tumor volume by 1.9-fold compared to controls.
• NPs treatment inhibited metastasis to the liver and lungs and increased Caspase-3 and TRAIL levels.

Conclusions:

• Ag3Au1Trp1:2NPs possess significant in vivo antitumor and antimetastatic properties.
• The nanoparticles induce cancer cell apoptosis through the extrinsic TRAIL-dependent pathway.
• Enhanced tumor targeting and retention contribute to the observed therapeutic effects.