| AS | ankylosing spondylitis |
| ASL | argininosuccinate lyase |
| BMD | bone mineral density |
| CD | Crohn’s disease |
| CTX | C-terminal telopeptide of type 1 collagen |
| FMT | fecal microbiota transplant |
| FXR | farnesoid X receptor |
| GI | gastrointestinal tract |
| GLP-1 | glucagon-like peptide-1 |
| GnRH | gonadotropin-releasing hormone |
| H2S | hydrogen sulfide |
| IBD | inflammatory bowel disease |
| ICAM-1 | intracellular adhesion molecule-1 |
| IELs | intraepithelial lymphocytes |
| IFNgamma | interferon gamma |
| IgA | Immunoglobulin A |
| IL-10 | interleukin 10 |
| IL-6 | interleukin 6 |
| IL1-beta | interleukin 1 beta |
| ILCs | innate lymphoid cells |
| LCA | monohydroxylated secondary lithocholic acid |
| LPS | lipopolysaccharide |
| M-CSF | macrophage colony stimuation factor |
| MAIT | mucosa-associated invariant T cell |
| MCP-1 | monocyte chemoattractant protein 1 |
| Ovx | ovarectomy |
| PNAd | peripheral lymph node addressins |
| PSGL-1 | P-selectin glycoprotein ligand-1 |
| PTH | parathyreoid hormone |
| RA | rheumatoid arthritis |
| RANKL | Receptor activator of nuclear factor kappa-Β ligand |
| SCFA | short chain fatty acid |
| SFB | Segmented filamentous bacteria |
| SpA | spondyloarthropathies |
| T1D | Typ 1 Diabetes |
| TGF-beta | transforming growth factor beta |
| TGR5 | G protein-coupled bile acid receptor 5 |
| Th17 | T helper 17 cell |
| TLR | Toll-like receptor |
| TMAO | trimethylamine N-oxide |
| TNF-alpha | tumor necrosis factor alpha |
| Tregs | regulatory T cells |
| TRM | T resident memory cell |
| UC | ulcerative colitis |
| VAP-1 | vascular adhesion protein-1 |
| VDR | vitamin D receptor |
| VEGF | vascular endothelial growth factor |