In an in vivo study using Apc Min/+ mice, Peptostreptococcus anaerobius significantly induced the expression of pro-inflammatory cytokines, which subsequently recruited a range of tumor-infiltrating immune cells, particularly immunosuppressive myeloid-derived suppressor cells, tumor-associated macrophages, and granulocytic-tumor-associated neutrophils, to promote tumor growth [52]. The gene discussed is APC; the disease is neoplasm.