Neuropeptide

Neuropeptides are "peptides released by neurons as intercellular messengers. Many neuropeptides are also hormones released by non-neuronal cells."

Types of neuropeptides

Gastrins

• Gastrin
• Cholecystokinin (CCK)

Neurohypophyseals

• Vasopressin
• Oxytocin
• Neurophysin I
• Neurophysin II

Neuropeptide Y

• Neuropeptide Y (NY)
• Pancreatic polypeptide (PP)
• Peptide YY (PYY)

Opioids

• Corticotropin (adrenocorticotropic hormone, ACTH)
• Beta-lipotropin
• Dynorphin
• Endorphin
• Enkephaline
• Leumorphin

Secretins

• Secretin
• Motilin
• Glucagon
• Vasoactive intestinal peptide (VIP)
• Growth hormone-releasing factor (GRF)

Somatostatins

• Somatostatin

Tachykinins

• Neurokinin A
• Neurokinin B
• Neuropeptide A
• Neuropeptide gamma
• Substance P

Others

• Bombesin
• Gastrin releasing peptide (GRP)