Early-Onset Colon Cancer: Is Your Gut to Blame?

Story at-a-glance Rising incidence of early-onset colorectal cancer is linked to changes in the gut microbiome, with specific bacterial strains producing mutagenic chemicals that contribute to cancer risk Global studies are underway to identify mutational signatures associated with gut bacteria, highlighting the significant role of dysbiosis in colorectal carcinogenesis Understanding the influence of gut bacteria on cancer development could lead to innovative therapeutic strategies, offering new avenues for prevention and treatment Research has identified a subtype of E. coli producing colibactin, a mutagen associated with cancer, suggesting that early exposure increases the risk of developing cancer at a younger age Dysbiosis, characterized by an imbalance in gut microbiota, is linked to colorectal cancer through mechanisms like genotoxicity, inflammation and oxidative stress, with specific bacteria such as Streptococcus bovis and Fusobacterium spp. playing a central role