Neurotensin (8-13) is a polypeptide composed of 6 amino acids, which retains the 6 amino acids at the end of the N-terminus in the Neurotensin sequence, and possesses the physiological activity of neurotensin. Neurotensin (8-13) reduces the cell surface NT1 receptor ( NTR1) Density. Neurotensin (8-13) sequence contains two arginines, which are basic peptides and have strong electron binding ability.