Moreover, the expressions of cytokines which were able to directly kill cancer cells such as TNFa, IFNg and CXCR4 were positively correlated with Odoribacter, Lachnospiraceae UCG-006, Desulfovibrio, and negatively correlated with Alloprevotella, Ruminiclostridium, Prevotellaceae UCG-001, Oscillibacter and Lachnospiraceae NK4A136. This evidence concerns the gene CXCR4 and cancer.