A team of Indian scientists has pioneered a one-step colloidal synthesis method to produce nanoparticles with a unique nano-cup shell structure, offering a promising tool for photothermal therapy (PTT) in cancer treatment. This innovation simplifies the previously complex and toxic fabrication processes, making cancer therapy more accessible and efficient.
Key Collaborations and Findings
As reported by dst.gov.in, the breakthrough emerged from a collaboration between the Institute of Nano Science and Technology (INST), Mohali, Advanced Centre for Treatment, Research & Education in Cancer (ACTREC), and IIT Bombay. Their findings, published in Communications Chemistry, highlight the development of PEGylated semi-shells (SS) at room temperature using a one-step approach.
Safe, Simple, and Scalable Process
Unlike traditional multi-step methods requiring harsh chemicals like hydrofluoric acid and high temperatures, this process uses a biocompatible metal-organic framework (ZIF-8) as a sacrificial template. Employing ascorbic acid (Vitamin C) as a mild reducing agent, researchers etched the ZIF-8 while simultaneously growing gold nanoparticles in its place. This produced semi-shells with strong light absorption in the near-infrared region, optimal for photothermal therapy.
Enhanced Therapeutic Potential
Surface passivation with polyethylene glycol (PEG) improved the nanoparticles’ stability, blood compatibility, and cryopreservability, ensuring safer intravenous delivery and a longer shelf life. The PEGylated SS nanoparticles demonstrated high photothermal conversion efficiency and nontoxic behavior, successfully ablating metastatic breast tumors in preclinical mouse models. The treatment significantly boosted survival rates and reduced tumor recurrence.
Future Biomedical Applications
This novel method offers superior photothermal performance and ease of administration compared to existing technologies. Looking ahead, researchers plan to explore chemo-photothermal therapy and the use of these semi-shells in Surface-Enhanced Raman Spectroscopy (SERS) for advanced cancer diagnostics, leveraging their distinct optical properties for broader biomedical applications.