To explore the expression and changes of neurokinin A (NKA) during the development, PAP immunohis-tochemistry method and image analysis were used to detect systematically the expression of NKA in rat colon from day 13 of embryo to adult stage.

• 探讨神经激肽A(NKA)在大鼠结肠发育中的表达及变化,应用免疫组织化学PAP法和图像分析系统观测大鼠胚胎13d至成年结肠中NKA的表达情况。