IPSE reduces resiniferatoxin-induced, pain-related freezing behaviors in
an IL-4- and nuclear localization sequence-dependent manner. (a) Mice
were administered intravenous phosphate-buffered saline (PBS) followed
by intravesical PBS/Tween/ethanol vehicle (“PBS-Veh”), intravenous PBS
with intravesical resiniferatoxin in vehicle (“PBS-RTx”), or one
intravenous dose of the H06 H-IPSE ortholog of IPSE 24 hours before
intravesical resiniferatoxin in vehicle (“H-IPSE-RTx”). (b) Mice were
given intravenous PBS and intravesical PBS (“saline”), intravenous PBS
and intravesical PBS/Tween/ethanol vehicle (“Vehicle”), intravenous PBS
and intravesical resiniferatoxin in vehicle (“RTx”), recombinant IL-4
given intraperitoneally followed by intravesical resiniferatoxin in
vehicle (“IL-4”), the H06 H-IPSE ortholog of IPSE given intravenously 24
hours before intravesical PBS with resiniferatoxin in vehicle
(“H-IPSE”), the H06 H-IPSE ortholog of IPSE 24 hours given intravenously
and anti-IL-4 antibody given intraperitoneally 30 minutes before
resiniferatoxin in vehicle administered intravesically (“H-IPSE+α-IL4”),
or a nuclear localization sequence (NLS) mutant of H06 H-IPSE given
intravenously 24 hours before resiniferatoxin in vehicle administered
intravesically (“H-IPSENLS”).