Polónyi J, Kapeller K, Mentel J, Stenovà J
Z Mikrosk Anat Forsch. 1989;103(4):675-9.
The authors attempted to block the effects of enkephalins in the lower mesenteric ganglion of the cat by injection of Nalorphin--the antagonist to morphine. In the ganglion they observed an accumulation of catecholamines in nerve cells, nerve terminals and SIF cells. The inhibitory action of enkephalins to catecholamines secretion from nerve cells was assumed.
作者试图通过注射纳洛芬（吗啡拮抗剂）来阻断脑啡肽在猫肠系膜下神经节中的作用。在神经节中，他们观察到神经细胞、神经末梢和SIF细胞中儿茶酚胺的积累。据此推测脑啡肽对神经细胞分泌儿茶酚胺具有抑制作用。
