Dermorphin and [D-Ala2-D-Leu5]enkephalin, administered intracerebroventricularly (icv) immediately after training in a passive avoidance test, exerted dose- and strain-dependent effects in DBA/2 (DBA) and C57BL/6 (C57) mice. In fact, the peptides impaired, at a low dose (5 ng), the retention performances of both strains; a higher dose (50 ng) impaired retention in DBA but improved it in C57 mice. A dose of naloxone (0.3 microgram, icv), which was ineffective when administered alone, antagonized the effects observed. The results are discussed in terms of strain differences in central mechanisms.
Dose- and strain-dependent effects of dermorphin and [D-Ala2-D-Leu5]enkephalin on passive avoidance behavior in mice.
Pavone F
1985
Abstract
Dermorphin and [D-Ala2-D-Leu5]enkephalin, administered intracerebroventricularly (icv) immediately after training in a passive avoidance test, exerted dose- and strain-dependent effects in DBA/2 (DBA) and C57BL/6 (C57) mice. In fact, the peptides impaired, at a low dose (5 ng), the retention performances of both strains; a higher dose (50 ng) impaired retention in DBA but improved it in C57 mice. A dose of naloxone (0.3 microgram, icv), which was ineffective when administered alone, antagonized the effects observed. The results are discussed in terms of strain differences in central mechanisms.File in questo prodotto:
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