| AGE | advanced glycation end product |
| eNOS | endothelial nitric oxide synthase |
| ENS | enteric nervous system |
| GI | gastrointestinal |
| IBS | irritable bowel syndrome |
| iNOS | inducible nitric oxide synthase |
| I/R | ischemia/reperfusion |
| NANC | non-adrenergic, non-cholinergic |
| NO | nitric oxide |
| NOS | nitric oxide synthase |
| nNOS | neuronal nitric oxide synthase |
| VIP | vasoactive intestinal polypeptide |