Abnormality of 5-hydroxytryptamine (5-HT) signaling system leads to abnormal gastrointestinal motility, secretion and visceral hypersensitivity.

• 5-羟色胺(5-HT)信号系统异常可致胃肠动力、分泌功能异常和内脏高敏感性，与多种功能性胃肠病密切相关。