In contrast, microinjection of M5 muscarinic receptor sense oligonucleotide (S-ONs) into the VTA did not block the expression of behavioral sensitization or the expression of FosB in the NAc or DG in the heroin sensitized rats.

• 但VTA中注射有义寡核苷酸(M5S-ONs)不能明显抑制大鼠行为敏化的表达,也不能抑制海洛因敏化大鼠NAc和DG中FosB蛋白的表达。