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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

G1-phase arrest of cultured human leukemic T-cells induced by deoxyadenosine.

Cultured human T-cell leukemia lymphocytes have enhanced sensitivity to growth inhibition by deoxyadenosine. We have used flow cytometry to investigate the mechanism of deoxyadenosine toxicity in cultured T-leukemic cells. Comparative studies on deoxyadenosine-resistant Epstein-Barr virus-transformed B-lymphocyte cell lines were also performed. After exposure of T-cells to low concentrations of deoxyadenosine (3 microM), in the presence of an adenosine deaminase inhibitor (erythro-9-[3-(2-hydroxynonyl)]adenosine), accumulation of cells of cells with a G1 DNA content was demonstrated. In contrast, B-cell lines showed a similar degree of growth inhibition after exposure to 200 to 400 microM deoxyadenosine but were blocked in S phase. The T-cell G1 block was associated with a rise in the deoxyadenosine triphosphate pool, and both these phenomena were prevented by the addition of deoxycytidine. The biochemical mechanism of this G1 block induced by deoxyadenosine in T-cells is not understood.[1]

References

  1. G1-phase arrest of cultured human leukemic T-cells induced by deoxyadenosine. Fox, R.M., Kefford, R.F., Tripp, E.H., Taylor, I.W. Cancer Res. (1981) [Pubmed]
 
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