Conclusions: 5-HT-IR cells might involve in the body physiological regulation during heroin dependence by increasing the cell numbers and enhancing the synthesis of hydroxytryptamine.

• 结论：大鼠胃窦5-HT-IR细胞通过增加细胞数和增强5-HT的分泌，参与了机体在海洛因依赖期的调节过程。