Cell population density and phenotypic expression of tissue culture fibroblasts from heterozygotes of Lesch-Nyhan's disease (inosinate pyrophosphorylase deficiency)

1969 ◽  
Vol 3 (6) ◽  
pp. 609-615 ◽  
Author(s):  
Joseph Dancis ◽  
Rody P. Cox ◽  
Peter H. Berman ◽  
Valerie Jansen ◽  
M. Earl Balis
Keyword(s):  
Tissue Culture ◽  
Population Density ◽  
Cell Population ◽  
Phenotypic Expression

scholarly journals Effect of cell population density on G2 arrest in Tetrahymena.

1975 ◽  
Vol 67 (3) ◽  
pp. 518-522 ◽  
Author(s):  
I L Cameron ◽  
N C Bols
Keyword(s):  
Cell Cycle ◽  
Population Density ◽  
Cell Population ◽  
Tritiated Thymidine ◽  
Tetrahymena Pyriformis ◽  
High Cell ◽  
Ciliated Protozoan ◽  
G2 Phase ◽  
Cell Densities ◽  
Two Peaks

The ciliated protozoan, Tetrahymena pyriformis strain GL-C, has been used to study the effect of cell population density during starvation on the synchrony obtained after refeeding and on the number of cells arrested in G2 phase of the cell cycle. At high cell densities two peaks of division indices were observed after refeeding while only one was observed at low cell densities. Cell division began earlier in cultures starved at high cell densities. Most importantly, the proportion of cells in G2 was considerably higher in populations starved at high cell densities. When tritiated thymidine was present during the refeeding period, radioautographs of cell samples at different times showed that the first cells to exhibit division furrows contained unlabeled nuclei. The first peak in the division index after refeeding was observed only at higher cell densities and is attributed to the cells arrested in G2. These results suggest that Tetrahymena is an excellent organism to study the concept of resting stages in the cell cycle and their control.

scholarly journals CytoplasmicEscherichia coliADP sugar pyrophosphatase binds to cell membranes in response to extracellular signals as the cell population density increases

2008 ◽  
Vol 288 (1) ◽  
pp. 25-32 ◽  
Author(s):  
María Teresa Morán-Zorzano ◽  
Manuel Montero ◽  
Francisco José Muñoz ◽  
Nora Alonso-Casajús ◽  
Alejandro Miguel Viale ◽  
...  
Keyword(s):  
Population Density ◽  
Cell Population ◽  
Cell Membranes ◽  
Extracellular Signals

scholarly journals Galactoglucomannans Increase Cell Population Density and Alter the Protoxylem/Metaxylem Tracheary Element Ratio in Xylogenic Cultures of Zinnia

2006 ◽  
Vol 142 (2) ◽  
pp. 696-709 ◽  
Author(s):  
Anna Beňová-Kákošová ◽  
Catherine Digonnet ◽  
Florence Goubet ◽  
Philippe Ranocha ◽  
Alain Jauneau ◽  
...  
Keyword(s):  
Population Density ◽  
Cell Population ◽  
Tracheary Element ◽  
Element Ratio

Spontaneous variations in the cell population of a T-cell lymphoma during tissue culture and transplantation

1975 ◽  
Vol 84 (1) ◽  
pp. 25-35 ◽  
Author(s):  
G. R. F. Krueger ◽  
H. -E. Schaefer ◽  
J. Luetzeler ◽  
R. Fischer ◽  
V. Kresin
Keyword(s):  
Tissue Culture ◽  
T Cell ◽  
Cell Population ◽  
Cell Lymphoma ◽  
T Cell Lymphoma

scholarly journals Loss of cell-population-density-dependent incorporation of fucose into the lipid fraction of cultured human tumour cells

1978 ◽  
Vol 172 (1) ◽  
pp. 181-184 ◽  
Author(s):  
M Gacto
Keyword(s):  
Population Density ◽  
Cell Population ◽  
Lipid Fraction ◽  
Tumour Cells ◽  
Human Tumour ◽  
Density Dependent ◽  
Human Tumour Cells ◽  
Normal Human ◽  
Tumour Cell Lines ◽  
Human Tumour Cell Lines

The incorporation of radioactively labelled fucose into the lipid fraction of cultured normal human cells and several human tumour-cell lines was examined as a function of the cell population density. Normal cells exhibited a density-dependent pattern of incorporation, whereas in tumour cells the radioactivity incorporated was independent of the cell population density. An exception was found among the tumour cells, which suggests a possible correlation between the loss of this marker and the ability to produce tumours.

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