Green chemistry: Modern therapies using nanocarriers for treating rare brain cancer metastasis from colon cancer.

Brain metastasis (BM) from colon cancer is associated with a poor prognosis and restricted treatment alternatives, largely due to issues related to blood-brain barrier (BBB) permeability and the negative effects of standard chemotherapy. Nanotechnology improves treatment efficacy by enabling targeted and controlled drug delivery. This review article evaluates the potential of nanotechnology-based therapies for treating colon cancer BM, emphasizing their capacity to cross the BBB, diminish metastatic growth, and enhance overall survival rates. A review of multiple studies evaluated nanoparticles (NPs) as carriers for chemotherapy, focusing on parameters including particle size, surface charge, and drug-loading capacity. The study also reviewed studies that examined BBB penetration, in vitro tumor accumulation, and in vivo tumor growth inhibition. In vitro findings indicated that NPs accumulate more efficiently in BM tissue than in healthy brain tissue and show significant BBB penetration. In vivo, nanotherapy markedly inhibited tumor growth and prolonged survival relative to conventional chemotherapy or control treatments while also exhibiting reduced side effects. Recent studies demonstrated that plant extracts can effectively and safely synthesize nanomaterials, positioning them as a viable and environmentally friendly precursor for nanomaterial production. Nanotechnology-based therapies demonstrate significant potential in the treatment of colon cancer BM by minimizing systemic toxicity, enhancing therapeutic efficacy, and facilitating more targeted drug delivery. Further research is required to confirm these findings and implement them in clinical practice.