Lignin Nanoparticles from Coffee Grounds Enhance the Cytotoxicity of Coffee Grounds Lignin and Induce Apoptosis in Colorectal Cancer (CRC) Cell Lines

Colorectal cancer (CRC) is the third most common malignant tumor worldwide, with morbidity and mortality rates increasing annually. Consequently, the development of safe and effective natural anti-tumor drugs has become a critical research focus. Lignin, a polyphenolic polymer abundant in nature, possesses a unique chemical structure that imparts antioxidant, anti-inflammatory, and tumor cell-related bioactivities, demonstrating remarkable potential in the prevention and treatment of CRC. In this study, we investigated the anti-tumor cell effects of coffee grounds lignin nanoparticles (CLN), prepared using aqueous ethanol extraction from coffee waste, against three CRC cell lines (HCT116, HT29, SW620). The results indicated that CLN potently inhibited the proliferation of all three CRC cell lines mentioned above. This research supports the transformation of lignin from natural products into innovative anti-colorectal cancer agent, offering new insights for the development of novel therapeutic strategies characterized by low toxicity and high efficacy. As research advances and technology continues to innovate, lignin-based nanoparticles emerge as key natural products in CRC therapy, offering new hope for patients and paving the way for the application of natural products in cancer therapy.