胃动素(MTL)是胃肠 M_0细胞分泌、由22个氨基酸残基组成的一种胃肠激素,是调节胃肠运动的主要胃肠激素之一。我们采用放射免疫方法对其在乳汁中含量进行了初步观察,报告如下。1 材料与方法1.1 标本采集:采集乳汁5ml 于洁净玻璃瓶中,加抑肽酶30μl防止 MTL 酶解。人乳在喂奶时采集,共35份,其中产后3～5天的初乳17份,40天～8月成熟乳 Motilin (MTL) is a gastrointestinal hormone secreted by gastrointestinal M_0 cells and composed of 22 amino acid residues. It is one of the major gastrointestinal hormones that regulate gastrointestinal motility. We used radioimmunoassay for its initial content in milk, the report is as follows. 1 Materials and Methods 1.1 Specimen Collection: Collection of milk 5ml in clean glass bottles, add aprotinin 30μl MTL to prevent hydrolysis. Human milk collected during breastfeeding, a total of 35, of which 3 to 5 days postpartum colostrum 17, 40 days to August mature milk