scholarly journals Modulation of dexamethasone receptor expression in embryonal carcinoma cells and their differentiated derivatives

1982 ◽  
Vol 208 (1) ◽  
pp. 235-238 ◽  
Author(s):  
Clare M. Isacke ◽  
John K. Heath
Keyword(s):  
Glucocorticoid Receptors ◽  
Embryonal Carcinoma ◽  
Binding Capacity ◽  
Culture Conditions ◽  
Carcinoma Cells ◽  
Receptor Expression ◽  
Embryonal Carcinoma Cell ◽  
Embryonal Carcinoma Cells ◽  
Epidermal Growth ◽  
Cell Culture Conditions

The dexamethasone binding capacity of embryonal carcinoma cells and their differentiated derivatives was investigated. Manipulation of the embryonal carcinoma cell-culture conditions resulted in an unstable reversible expression of the glucocorticoid receptors. Stable expression of the receptors is observed when these cells are induced to differentiate. Cells grown under identical conditions were assayed for their ability to bind epidermal growth factor.

scholarly journals Expression of simian virus 40 large T antigen in embryonal carcinoma cell hybrids.

1984 ◽  
Vol 4 (8) ◽  
pp. 1657-1660 ◽  
Author(s):  
A Tunnacliffe ◽  
L V Crawford ◽  
P Goodfellow
Keyword(s):  
Embryonal Carcinoma ◽  
Carcinoma Cell ◽  
Simian Virus 40 ◽  
Simian Virus ◽  
T Antigen ◽  
Carcinoma Cells ◽  
Embryonal Carcinoma Cell ◽  
Embryonal Carcinoma Cells ◽  
Large T Antigen ◽  
Early Region

Previous work has shown that murine embryonal carcinoma cells are refractory to infection with various viruses, including simian virus 40. Thus, large T and small t antigens, the products of the simian virus 40 early region, are not produced when the virus infects embryonal carcinoma cells, in contrast to other cell types. We show, by qualitative and quantitative analyses, that embryonal carcinoma cell hybrids, containing a simian virus 40 early region integrated into human DNA, are capable of producing viral large T antigen.

scholarly journals A novel keratan sulphate proteoglycan from a human embryonal carcinoma cell line

1992 ◽  
Vol 286 (3) ◽  
pp. 959-966 ◽  
Author(s):  
S Cooper ◽  
M F Pera ◽  
W Bennett ◽  
J T Finch
Keyword(s):  
Embryonal Carcinoma ◽  
Broad Band ◽  
Gel Filtration ◽  
Exchange Chromatography ◽  
Carcinoma Cells ◽  
Embryonal Carcinoma Cell ◽  
Embryonal Carcinoma Cells ◽  
Keratan Sulphate ◽  
Major Band ◽  
Sulphate Proteoglycan

We describe here the purification and partial characterization of a 200 kDa keratan sulphate proteoglycan found in the pericellular matrix of human embryonal carcinoma cells. Previously we have shown that this molecule is recognized by a monoclonal antibody (GCTM-2). The antigen was isolated using ion-exchange chromatography and gel filtration, purification being monitored by e.l.i.s.a. using GCTM-2. Metabolic labelling of GCT 27 C-4 embryonal carcinoma cells with sodium [35S]sulphate resulted in the incorporation of [35S]sulphate into the purified molecule. Throughout the purification procedure, the peaks of 35S radioactivity were coincident with the peaks of immunoreactivity, and this label was released both by digestion with keratanase and chondroitinase, confirming the proteoglycan nature of the antigen. The intact molecule ran as a single broad band of 200 kDa, which has been identified by silver staining and immunoblotting following gel electrophoresis. Amino acid analysis of the purified antigen indicated a high content of serine, glycine and aspartic acid/asparagine residues. Visualization by rotary-shadowing electron microscopy suggests that the purified material forms large aggregates, even under denaturing conditions. Deglycosylation of this preparation with trifluoromethanesulphonic acid yielded a major band of 55 kDa and a minor band of 48 kDa. The biochemical nature of the molecule described here, along with tissue distribution studies using GCTM-2, indicates that the antigen is not related to previously described keratan sulphate proteoglycans.

scholarly journals Ribonucleoprotein particles with LINE-1 RNA in mouse embryonal carcinoma cells.

1991 ◽  
Vol 11 (9) ◽  
pp. 4804-4807 ◽  
Author(s):  
S L Martin
Keyword(s):  
Embryonal Carcinoma ◽  
Mouse Genome ◽  
Carcinoma Cell ◽  
Carcinoma Cells ◽  
Embryonal Carcinoma Cell ◽  
Embryonal Carcinoma Cells ◽  
Ribonucleoprotein Particle ◽  
Repeat Family ◽  
Embryonal Carcinoma Cell Line ◽  
Mammalian Genomes

The LINE-1 repeat family is interspersed throughout mammalian genomes and is thought to be the result of duplicative transposition of LINE-1 sequences via an RNA intermediate. This report describes a ribonucleoprotein particle with LINE-1 RNA in the mouse embryonal carcinoma cell line F9. This ribonucleoprotein particle is a potential intermediate in the transposition of LINE-1 in the mouse genome.

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