title: Neuropeptide alterations in the central nervous system in aging.
mesh_terms: D000375:Aging; D000818:Animals; D001921:Brain / Q000378:metabolism; D002490:Central Nervous System / Q000502:physiology*; D006801:Humans; D008297:Male; D009496:Neurotensin / Q000378:metabolism; D010455:Peptides / Q000502:physiology*; D051381:Rats; D011916:Rats, Inbred F344; D013004:Somatostatin / Q000378:metabolism; D013045:Species Specificity; D013373:Substance P / Q000378:metabolism
chemical_list: D010455:Peptides; D013373:Substance P; D009496:Neurotensin; D013004:Somatostatin