Effects
of the systemic administration of standard S1R drugs (BD-1063
and PRE-084) and several experimental compounds in capsaicin-induced
mechanical hypersensitivity in mice. (A) Effects of the subcutaneous
(s.c.) administration of BD-1063, 8f and 5b on mechanical allodynia induced by the intraplantar (i.pl.) administration
of capsaicin (1 μg), and absence of antiallodynic effects induced
by 4b. (B) Effects of BD-1063, 8f and 5b administered alone and associated with the S1R agonist
PRE-084. (C) Effect of BD-1063 alone and associated with 4b. Values are the mean ± standard error of the mean (SEM) obtained
from six to nine animals per group: * p < 0.05,
**p < 0.01 vs nonsensitized animals
treated with the solvent of the drugs (black bar); #p < 0.05, ##p < 0.01 vs capsaicin-injected mice treated with the solvent of the
drugs (white bar); +p < 0.05,++p < 0.01 selected doses of antiallodynic
compounds associated with PRE-084 (B) or 4b (C), or their
solvent (one-way analysis of variance (ANOVA) followed by Bonferroni
test).