A fragment of substance P with specific central activity: SP(1-7)

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Abstract

Amino-terminal fragments of substance P (SP), SP(1-7) and SP(1-8), were found to produce naloxone-reversible antinociception in the mouse similar to that production by SP. Similar to SP, these peptides produce antinociception only within a narrow dose range. They have no activity on smooth muscle or blood pressure. These results suggest that contrary to peripheral effects of SP, which are mediated by receptors which recognize the carboxy-terminal part of the SP molecule, certain central actions of SP are mediated by receptors which recognize the amino-terminal part of the SP molecule. SP may be metabolized to this active fragment prior to its action at these receptors.

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Stewart, J. M., Hall, M. E., Harkins, J., Frederickson, R. C. A., Terenius, L., Hökfelt, T., & Krivoy, W. A. (1982). A fragment of substance P with specific central activity: SP(1-7). Peptides, 3(5), 851–857. https://doi.org/10.1016/0196-9781(82)90015-8

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