Comparison of effects of the GRPR antagonist RC-3095 and NPRA antagonist A71915 on
intradermal pruritogen-induced scratching. Each antagonist was intrathecally
administered 10 minutes prior to intradermal pruritogen. Scratching bouts were
observed immediately after intradermal administration of endothelin (A, B),
U-46619 (C, D), BAM8-22 (E, F), or SLIGRL (G, H) up to 30 minutes. Time course in
10-minute intervals (tops: A, C, E, G) and total scratching bouts for 30 minutes
(bottoms: B, D, F, H) are shown. Each value represents mean ± S.E.M.
(n = 6). #P < 0.05 versus
vehicle/SLIGRL.