Fig. 4
Changes in P2X3R expression in TG neurons innervating whisker pad skin and the involvement of P2X3R signaling in TG neurons in orofacial mechanical hypersensitivity on day 7 following TNC. a Photomicrograph of FG-labeled P2X3IR TG neurons following the TNC or sham procedure. Arrows indicate FG-labeled P2X3IR TG neurons. Scale bar: 100 μm. b Mean number of FG-labeled TG neurons ipsilateral to the TNC or sham procedure (n = 5 in each). c The frequency of FG-labeled P2X3-IR TG neurons ipsilateral to the TNC or sham procedure. * p < 0.05 vs. sham. (n = 5 in each, student’s t-test). d The time course of changes in the MHWT by subcutaneous A317491 or TNP-ATP administration on day 7 following the TNC or sham procedure. Data are presented as median, interquartile range (25–75 %), and maximum and minimum values. * p < 0.05. (n = 4–6; Kruskal-Wallis followed by Dunn’s multiple comparisons test)