GLP-1(28-36)amide, a C-terminal nonapeptide derived from the cleavage of GLP-1 by neutral endopeptidase (NEP), is a significant product. It functions as an antioxidant and primarily targets the mitochondrion, where it effectively inhibits mitochondrial permeability transition (MPT). This compound exhibits anti-diabetic properties and demonstrates cardioprotection effects[1].
Substance P (1-9) is a nonapeptide that reduces the inactivation of substance P in the guinea-pig ileum and urinary bladder, and is responsible for various excitatory effects on central and peripheral neurons.