Antinociceptive effects in rodents of the dipeptide Lys-Trp (Nps) and related compounds.
Peptides
; 7(1): 39-43, 1986.
Article
en En
| MEDLINE
| ID: mdl-3012488
ABSTRACT
Intracerebroventricular administration of the synthetic dipeptide derivative Lys-Trp (Nps) (LTN) elicits a potent and naloxone-sensitive antinociceptive effect in mice and in rats using heat and electrical current respectively as the noxious stimuli. LTN does not induce analgesia by directly acting on opioid receptors but the peptidase inhibiting activity of the new compound may account in part for the behavioral effect. LTN produces also a marked decrease in the met-enkephalin content of the periaqueductal gray suggesting a possible enkephalin releasing property. Structure-activity studies with different analogs of LTN indicate that replacement of Lys by other basic amino acids results also in compounds with a potent antinociceptive effect whereas replacement by neutral or acidic amino acids leads to a complete loss of activity.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Oligopéptidos
/
Dipéptidos
/
Analgésicos
Límite:
Animals
Idioma:
En
Revista:
Peptides
Año:
1986
Tipo del documento:
Article