Expression of mGlu2 receptors in the mouse spinal cord after curcumin treatment. A single or repeated injections of CUR (100 mg/kg, ip) decreased the expression of mGlu2 receptors in the lumbar segment of the spinal cord. Data are the means ± S.E.M. of 4 animals. *p < 0.05 (Student’s t test) versus values obtained in animals treated with vehicle.