Fig. 1

GPR55 expression in the medial orbital (MO) cortex. a Immunohistochemistry images showing GPR55 expression in the MO cortex. Scale bar = 100 μm. b The mRNA level of GPR55 in restraint-stressed mice did not change compared to that in the control group. c GPR55 expression decreased after daily exposure (4 h per exposure) to CRS for 21 consecutive days. *p < 0.05 versus control group. Each group contains 6–8 mice. Data are from three independent experiments