Summary
N-terminal and C-terminal fragments of substance P (SP) have been shown to exert opposite effects on antinociception, grooming and fighting in mice. The present experiments explored whether these findings could be generalized to passive avoidance behavior. Substance P (SP-(1-11)) and the c-terminal, fragment pyroglutamyl-SP-(7-11) attenuated passive avoidance behavior when picogram amounts were injected into the nucleus accumbens. In contrast, the N-terminal fragment, SP-(1-7) had an opposite effect and facilitated passive avoidance behavior.
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Gaffori, O., Stewart, J.M. & de Wied, D. Influence of substance P and fragments on passive avoidance behavior. Experientia 40, 89–91 (1984). https://doi.org/10.1007/BF01959118
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DOI: https://doi.org/10.1007/BF01959118