| ACSS2 | Acyl-CoA synthetase short-chain family member 2 |
| AhR | Aryl hydrocarbon receptor |
| APCs | Antigen-presenting cells |
| ARG1 | Arginase 1 |
| CART-T | Chimeric antigen receptor T Cell |
| CBM588 | Clostridium butyricum MIYAIRI 588 |
| CCL20 | C-C motif chemokine ligand 20 |
| CRC | Colorectal cancer |
| CTLA-4 | Cytotoxic T-lymphocyte-associated protein 4 |
| DCs | Dendritic cells |
| FFAR2 | Free fatty acid receptor 2 |
| FFAR3 | Free fatty acid receptor 3 |
| FMT | Faecal microbiota transplantation |
| Gαq | G protein subunit alpha q |
| HCC | Hepatocellular carcinoma |
| HDAC | Histone deacetylase |
| ICIs | Immune checkpoint inhibitors |
| ID2 | Inhibitor of DNA binding 2 |
| IFN-γ | Interferon gamma |
| IGF1 | Insulin-like growth factor 1 |
| IL | Interleukin |
| JAK1/2 | Janus kinase 1/2 |
| LBPs | Live biotherapeutic products |
| LPS | Lipopolysaccharide |
| MAMPs | Microbe-associated molecular patterns |
| MAPK | Mitogen-activated protein kinase |
| MART-1 | Melanoma antigen recognised by T cells 1 |
| MDSCs | Myeloid-derived suppressor cells |
| MHC | Major histocompatibility complex |
| MSI-H | Microsatellite instability-high |
| mTOR | Mechanistic target of rapamycin |
| NF-κB | Nuclear factor kappa B |
| NK | Natural Killer |
| NSCLC | Non-small cell lung cancer |
| OS | Overall survival |
| PD-1 | Programmed cell death protein 1 |
| PD-L1 | Programmed death-ligand 1 |
| PFS | Progression-free survival |
| PI3K | Phosphoinositide 3-kinase |
| PPARγ | Peroxisome proliferator-activated receptor gamma |
| PRRs | Pattern recognition receptors |
| RCC | Renal cell carcinoma |
| SCFAs | Short-chain fatty acids |
| TKI | Tyrosine kinase inhibitor |
| TLR3 | Toll-like receptor 3 |
| TLR4 | Toll-like receptor 4 |
| TLR5 | Toll-like receptor 5 |
| TME | Tumour microenvironment |
| TNF-α | Tumour necrosis factor alpha |
| TRAMP | Transgenic adenocarcinoma of the mouse prostate |
| Tregs | Regulatory T cells |