For MS patients, Faecalibacterium demonstrated positive correlations with PDGF-bb (platelet-derived growth factor BB), MIP-1a, MCP-1 (monocyte chemotactic protein-1), IL-1ra (interleukin-1 receptor antagonist), G-CSF (granulocyte colony stimulating factor), and negative correlation with TNF-α (tumor necrosis factor-alpha). The gene discussed is CCL2; the disease is myeloid sarcoma.