Die Derivate (IIc)‐(IIf), (VI), (VIId)‐(VIIg) und (IX) der Titelverbindungen (IIa) bzw. (VIIa) [THIP == Tetra.‐ hydroisoxazolo‐pyridin‐3‐ol werden ‐ wie im Formelschema skizziert ‐ dargestellt und besitzen teilweise Weitere Substanzen mit ähnlichem Substitutionsmuster werden ebenfalls synthetisiert, sind aber biologisch weniger relevant.
SummaryThe synthesis and biological testing of analogues of Met-enkephalin, a recently discovered opioid peptide from mammalian brain, are described. Testing involved determination of affinity constants for an opiate receptor site and of analgesic potency in the tail-flick test in mouse. The effects on opioid activity of modifying various parts of the enkephalin molecule are discussed. Tyr-D-Ala-Gly-MePheMet (O)-oll) (FK 33-824), which was highly active in these tests, was subsequently selected for clinical testing.The use of two complementary models -in vitro binding studies and in vivo test for analgesia -for the assessment of biological activity in the evaluation of analogues is explained.
Es wird die analgetische Wirksamkeit des synthetischen Pentapeptides (I) mit dem als Vorbild dienenden Methioninenkephalin (einem morphinomimetischen Pentapeptid aus dem Gehirn von Säugetieren, das eine schwache und kurzzeitige Schmerzunempfindlichkeit bewirkt, sowohl intracerebroventicular als auch intravenös) und anderen Verbindungen verglichen.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.