A new treatment approach based on nanotechnology was found effective in mouse models for the most common type of lung cancer, non-small cell lung cancer (NSCLC). The disease continues to be difficult to treat, with five-year survival rates of about 36 percent for stage 3A tumors. Findings of the study were published in the journal Molecular Pharmaceutics.
The nanoparticles were designed to deliver a molecule that's been shown to stall tumor growth and may make tumors more susceptible to chemotherapy. The molecule, called microRNA 29b, would be ineffective if delivered by injection alone, as it quickly becomes degraded in the bloodstream or picked up and removed by immune cells.
To bypass these limitations, Sunday Shoyele, PhD, Associate Professor in the Department of Pharmaceutical Sciences at Jefferson (Philadelphia University + Thomas Jefferson University) and colleagues, developed a nanoparticle comprised of four parts. First, Dr. Shoyele included part of a human antibody, immunoglobulin G (IgG), to cloak the particle from the immune system. Second, the research team added the MUC1 antigen, which acts like a navigation system guiding the nanoparticles to the MUC1-covered lung tumors. Finally, the therapeutic payload, microRNA-29b, along with the other two components are glued together using a sticky polymer called poloxamer-188.
Additional tests are needed before the technology is ready for testing in human clinical trials. Dr. Shoyele plans to continue the research with comprehensive toxicity tests and scaling the nanoparticle manufacturing process for clinical trials.