Thionine Conjugated Gold Nanoparticles Trigger Apoptotic Activity Toward HepG2 Cancer Cell Line

Area of Science:

• Nanomedicine
• Biotechnology
• Materials Science

Background:

• Gold nanoparticles (GNP) conjugated with thionine (TN) were synthesized to target cancer cells.
• Two complexes, GTN1 and GTN2, were formed under different conditions, influencing their interaction with GNP.

Purpose of the Study:

• To investigate the synthesis and characterization of GTN1 and GTN2 complexes.
• To evaluate the cytotoxic activity of these complexes on hepatocellular carcinoma (HepG2) cell lines.
• To elucidate the mechanism of cancer cell death induced by the complexes.

Main Methods:

• Synthesis and characterization of gold nanoparticle-thionine complexes (GTN1, GTN2) using techniques like spectroscopy, microscopy, and DLS.
• Cytotoxicity assessment using MTT assay on HepG2 cells.
• Analysis of reactive oxygen species (ROS) generation, nuclear fragmentation, and cell cycle progression.

Main Results:

• GTN1 demonstrated strong binding to DNA and induced significant structural perturbation.
• The primary mechanism of cytotoxicity was identified as ROS generation, leading to nuclear fragmentation.
• GTN1 effectively induced apoptosis-mediated cell death and inhibited cancer cell proliferation more than other compounds.

Conclusions:

• GTN1 is a potent inhibitor of cancer cell proliferation, offering a promising approach for biomedical applications.
• The study underscores the potential of targeted nanoparticles in cancer therapy.
• Further research into nanoparticle-drug conjugates could lead to novel cancer treatment strategies.