Keshav S, Lawson L, Chung L P, Stein M, Perry V H, Gordon S
Sir William Dunn School of Pathology, Oxford University, United Kingdom.
J Exp Med. 1990 Jan 1;171(1):327-32. doi: 10.1084/jem.171.1.327.
Paneth cells in normal murine small intestine contain TNF mRNA that is readily detectable by in situ hybridization, unlike resident macrophages in lamina propria, which are negative. Northern blot analysis of whole tissue shows the presence of mRNA that has the same electrophoretic mobility as TNF mRNA from activated macrophages. A low level of TNF bioactivity, but no immunoreactivity, was detected in normal small intestine, and TNF production in resting Paneth cells appears to be post-transcriptionally controlled. Typical leukocyte surface membrane markers were not found on Paneth cells, but were expressed by the surrounding lamina propria macrophages. Paneth cells are thus epithelial cells with leukocyte-like secretory potential that may be important in intestinal physiology and pathology.
正常小鼠小肠中的潘氏细胞含有可通过原位杂交轻易检测到的肿瘤坏死因子(TNF)信使核糖核酸(mRNA),这与固有层中呈阴性的常驻巨噬细胞不同。对全组织的Northern印迹分析显示存在与活化巨噬细胞的TNF mRNA具有相同电泳迁移率的mRNA。在正常小肠中检测到低水平的TNF生物活性,但未检测到免疫反应性,静息潘氏细胞中的TNF产生似乎受到转录后调控。在潘氏细胞上未发现典型的白细胞表面膜标志物,但周围固有层巨噬细胞表达这些标志物。因此,潘氏细胞是具有类似白细胞分泌潜能的上皮细胞,这可能在肠道生理和病理中起重要作用。