Figure 4.

Comparison of 5-HT₃R expressions before and after treatment. (a) Immunohistochemistry for 5-HT₃R expressions in sigmoid mucosa tissue of IBS patients before and after treatments in the EA and Mox groups (IHC staining, ×20). Arrows represent immunohistochemistry positive expressions. (b) 5-HT₃R expressions in the EA and Mox groups before treatment comparing to the NC group, (c) 5-HT₃R expression before and after the treatment in the EA group (P < 0.01), and (d) 5-HT₃R expression before and after the treatment in the Mox group (P < 0.01). NC: the normal control group, EA: the electroacupuncture group, and Mox: the mild moxibustion group.