Fine structural analysis of the effect of trypan blue on the visceral endoderm of the mouse egg cylinder
作者:
Bruce E. Batten,
Jack L. Haar,
期刊:
Cells Tissues Organs
(Karger Available online 1979)
卷期:
Volume 105,
issue 3
页码: 256-268
ISSN:1422-6405
年代: 1979
DOI:10.1159/000145129
出版商: S. Karger AG
关键词: Trypan blue;Mouse egg cylinder;Visceral endoderm;Endocytosis
数据来源: Karger
摘要:
The effects of a maternal injection of trypan blue on primitive streak mouse embryos were studied with electron microscopy. Commercial trypan blue was purified by descending paper chromatography, and pregnant females received an intraperitoneal injection of the collected blue fraction on the evening of the 7th day of gestation. Ultrastructurally, the changes in the visceral endoderm were apparent 10 min after the injection and included an increase in the number of fuzzy-coated vesicles in the apical cytoplasm. By 20 min the apical cytoplasm of the extraembryonic visceral endodermal cells was filled with many fuzzy-coated vesicles and numerous vacuoles of various size and electron density. 30 min after the injection, the extraembryonic visceral endodermal cells were relatively smooth lacking a microvillous border and evidence of endocytic activity was rare. Many embryonic visceral endodermal cells were observed in various stages of degeneration although the underlying embryonic ectoderm appeared unaffected. Morphologically, it appears that trypan blue exerts its first effect by altering the endocytic activity of the visceral endoderm.
点击下载:
PDF
(1898KB)
返 回