High Levels of Oncomodulin and Calmodulin Expression in the Log Phase of Cell Growth in a Chemically Transformed Rat Fibroblast Cell Line

1990 ◽  
pp. 121-125 ◽  
Author(s):  
Janaki K. Blum ◽  
Ernst W. Sommer ◽  
Marianne C. Berger ◽  
Martin W. Berchtold
Keyword(s):  
Cell Growth ◽  
Cell Line ◽  
Fibroblast Cell ◽  
Fibroblast Cell Line

Survival and Function of Fibroblasts Stored as Stock Cultures at a Non-freezing Temperature

1993 ◽  
Vol 21 (2) ◽  
pp. 206-209
Author(s):  
Anders H. G. Andrén ◽  
Anders P. Wieslander
Keyword(s):  
Cell Growth ◽  
Cell Line ◽  
Cell Lines ◽  
Fibroblast Cell ◽  
Freezing Temperature ◽  
Mouse Fibroblast ◽  
Toxic Response ◽  
Normal Manner ◽  
And Function

Cytotoxicity, measured as inhibition of cell growth of cultured cell lines, is a widely used method for testing the safety of biomaterials and chemicals. One major technical disadvantage with this method is the continuous routine maintenance of the cell lines. We decided to investigate the possibility of storing stock cultures of fibroblasts (L-929) in an ordinary refrigerator as a means of reducing the routine workload. Stock cultures of the mouse fibroblast cell line L-929 were prepared in plastic vials with Eagle's minimum essential medium. The vials were stored in a refrigerator at 4–10°C for periods of 7–31 days. The condition of the cells after storage was determined as cell viability, cell growth and the toxic response to acrylamide, measured as cell growth inhibition. We found that the L-929 cell line can be stored for 2–3, weeks with a viabilty > 90% and a cell growth of about 95%, compared to L-929 cells grown and subcultured in the normal manner. The results also show that the toxic response to acrylamide, using refrigerator stored L-929 cells, corresponds to that of control L-929 cells. We concluded that it is possible to store L-929 cells in a refrigerator for periods of up to 3 weeks and still use the cells for in vitro cytotoxic assays.

Evidence of an oscillating peripheral clock in an equine fibroblast cell line and adipose tissue but not in peripheral blood

2006 ◽  
Vol 192 (7) ◽  
pp. 743-751 ◽  
Author(s):  
Barbara A. Murphy ◽  
Mandi M. Vick ◽  
Dawn R. Sessions ◽  
R. Frank Cook ◽  
Barry P. Fitzgerald
Keyword(s):  
Adipose Tissue ◽  
Cell Line ◽  
Peripheral Blood ◽  
Fibroblast Cell ◽  
Fibroblast Cell Line ◽  
Peripheral Clock

Comparative study of a new composite biomaterial fluor-hydroxyapatite on fibroblast cell line NIH-3T3 by direct test

Biologia ◽  
2008 ◽  
Vol 63 (2) ◽  
Author(s):  
Marica Theiszová ◽  
Soňa Jantová ◽  
Silvia Letašiová ◽  
Ľuboš Valík ◽  
Martin Palou
Keyword(s):  
Comparative Study ◽  
Cell Line ◽  
Dna Content ◽  
Fibroblast Cell ◽  
Cell Number ◽  
Fibroblast Cell Line ◽  
3T3 Cells ◽  
End Points ◽  
Basal Cytotoxicity ◽  
Nih 3T3

AbstractThe number of biomaterials used in biomedical applications has rapidly increased in the past two decades. Fluorapatite (FA) is one of the inorganic constituents of bone or teeth used for hard tissue repairs and replacements. Fluor-hydroxyapatite (FHA) is a new synthetically prepared composite that in its structure contains the same molecular concentration of OH− groups and F− ions. The aim of this experimental investigation was to use the embryonal mouse fibroblast cell line NIH-3T3 for comparative study of basal cytotoxicity of fluoridated biomaterials FHA and FA discs. Hydroxyapatite (HA) disc, high-density polyethylene as negative control and polyvinyl chloride (PVC) containing organotin stabilizer as positive control were used as standard biomaterials. The appropriateness of the use of NIH-3T3 cells and their sensitivity for tested biomaterials were evaluated on the basis of five cytotoxic end points: cell proliferation, cell morphology, lactate dehydrogenase (LDH) released, protein and DNA cell content. The basal cytotoxicity of FHA, FA and HA discs was measured by direct contact method. FHA composite, FA and HA demonstrated in cell line NIH-3T3 nearly similar basal cytotoxicity increasing with the time of treatment. After 72 h of biomaterials treatment, about 25% inhibition of cell number, unchanged morphology of dividing cells, 6.31–0.16% increase of released LDH, about 10% inhibition of cell protein content and about 20% inhibition of DNA content was found. On the other hand, from the growth rates it resulted that NIH-3T3 cells, affected by tested biomaterials, divided about 20% slowlier than the control (untreated cells). Using the linear regression analysis we found out that deviations in measurements of cytotoxicity by four methods were as follows: less than 10% for cell number, protein and DNA content methods and 12.4% for released LDH method. Based on a good correlation of the cytotoxicity of biomaterials obtained from all end points we could conclude that fibroblast NIH-3T3 cell line was appropriate for measuring the basal cytoxicity of tested biomaterials.

Rosette formation by a mouse fibroblast cell line

Nature ◽  
1974 ◽  
Vol 248 (5448) ◽  
pp. 514-515 ◽  
Author(s):  
E. V. ELLIOTT ◽  
R. S. KERBEL ◽  
B. J. PHILLIPS
Keyword(s):  
Cell Line ◽  
Fibroblast Cell ◽  
Mouse Fibroblast ◽  
Rosette Formation ◽  
Fibroblast Cell Line ◽  
Mouse Fibroblast Cell ◽  
Mouse Fibroblast Cell Line

Activation and repression of a beta-globin gene in cell hybrids is accompanied by a shift in its temporal replication

1989 ◽  
Vol 9 (8) ◽  
pp. 3524-3532
Author(s):  
V Dhar ◽  
A I Skoultchi ◽  
C L Schildkraut
Keyword(s):  
Cell Line ◽  
Hybrid Cell ◽  
Globin Gene ◽  
Fibroblast Cell ◽  
Globin Genes ◽  
Fibroblast Cell Line ◽  
Beta Globin ◽  
Hybrid Cells ◽  
Beta Globin Gene ◽  
Cell Hybrids

To investigate whether a switch in the transcriptional activity of a gene is associated with a change in the timing of replication during the S phase, we examined the replication timing of the beta-globin genes in two different types of somatic cell hybrids. In mouse hepatoma (Hepa 1a) x mouse erythroleukemia (MEL) hybrid cells, the beta-globin gene from the MEL parent is transcriptionally inactivated and is later replicating than in the parental MEL cell line. In human fibroblast (GM3552) x MEL hybrid cells, the human beta-globin gene is transcriptionally activated, and all of the sequences within the human beta-globin domain (200 kilobases) we have examined appear to be earlier replicating than those in the parental fibroblast cell line. The chromatin configuration of the activated human beta-globin domain in the hybrids is relatively more sensitive to nucleases than that in the fibroblasts. Furthermore, major nuclease-hypersensitive sites that were absent in the chromatin flanking the distal 5' region of the human beta-globin gene cluster in the parental fibroblast cell line are present in the transcriptionally activated domain in the hybrid cell line. These results suggest that timing of replication of globin genes has been altered in these hybrid cells and thus is not fixed during the process of differentiation.

Sign in / Sign up

Export Citation Format

Share Document