Linked Life Data

3327672

Source:http://linkedlifedata.com/resource/pubmed/id/3327672

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1988-5-2
pubmed:abstractText
A variety of cellular interactions is involved in the process of implantation of the mammalian embryo into the uterine tissue. Recent discoveries have demonstrated that intercellular recognition and adhesive events are governed by a class of cell surface molecules known as cell adhesion molecules (CAMs). In the present report, we have investigated the occurrence of the well-characterized cell adhesion molecule cell-CAM 105 on the surface of rat pre- and peri-implantation embryos of various stages. This was carried out by indirect immunofluorescence microscopy employing affinity-purified rabbit antibodies against cell-CAM 105. The embryonal stages investigated comprised morulae, normal day-4 blastocysts, and delayed and adhesive blastocysts obtained by using the method of experimentally delayed implantation. Cell-CAM 105 was absent in the early-morula stage, but in normal day-4 blastocysts and delayed blastocysts a specific staining for cell-CAM 105 was seen on the entire surface. However, adhesive-stage blastocysts exhibited a marked polarity with staining of the polar trophoblast cells. Scanning electron microscopy of adhesive-stage blastocysts revealed that the stronger staining of the polar region was not due to a greater number of microvilli on the polar trophoblast cells. Thus, it seems as if cell-CAM 105 is lost or masked from the surface of the mural trophoblast cells of adhesive-stage rat blastocysts. Since the mural trophoblast cells are the first to adhere to the uterine luminal epithelium during the onset of implantation and subsequently invade the uterine stroma, we suggest that the apparent downregulation of cell-CAM 105 in the mural trophoblast cells might be linked to the acquisition of trophoblast invasiveness.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0950-1991
pubmed:author
pubmed:issnType
Print
pubmed:volume
100
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
653-60
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Trophectoderm surface expression of the cell adhesion molecule cell-CAM 105 on rat blastocysts.
pubmed:affiliation
Department of Human Anatomy, University of Uppsala, Sweden.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't