Spearman correlation analysis showed that the decrease in the relative abundances of Roseburia, Prevotella sp-S7-1-8, Firmicutes bacterium-CAG321, and Clostridium sp-CAG302 was significantly negatively associated with the ABC transporter metabolic pathway (ko02010), biofilm formation-Escherichia coli (ko02026), central carbon metabolism in cancer (ko05230), and phosphotransferase system (ko02060) metabolic pathway. This evidence concerns the gene ABCG2 and cancer.