The relative transcript expression levels of six genes (cxcl9, camp, cfb, cxxc4, ulk3, and cd302) in the TB model group vs. the normal group, were analyzed in the TB patients and healthy individuals by RT-qPCR to verify the reliability of profile results and ifn-γ was used as a positive control (Figure 3). This evidence concerns the gene CXXC4 and tuberculosis.