Crossref journal-article
Wiley
International Journal of Cancer (311)
Abstract

AbstractThe inhibitory effects of anti‐tumor, bacterial filament forming platinum compounds, Cis‐Pt(II) (NH3)2Cl2 (A), Cis‐Pt(IV) (NH3)2Cl4 (B), and Pt(II) (NH2)2(CH2)2Cl2(C) on DNA, RNA and protein syntheses was measured by the incorporation of 3H‐thymidine, 3H‐uridine, and 3H‐L‐leucine, respectively, into an acid‐insoluble polymer in human amnion AV3 cells. Compound A, the most effective tumor‐inhibiting platinum compound, was shown to selectively inhibit DNA synthesis below 5μM and to inhibit 3H‐thymidine incorporation more rapidly than 3H‐uridine or 3H‐leucine incorporation at 25μM. Like A, compounds B and C were also shown to inhibit all three processes after a 24‐hour period of treatment at 25μM. A correlation was established between the relative anti‐tumor effectiveness of compounds A, B, and C and the extent of their inhibitory effects. On the other hand, two non‐tumor‐inhibiting platinum compounds, [Pt(II) (NH3)4]Cl2 (D) and Trans‐Pt(IV) (NH3)2Cl4 (E) had no inhibitory effects, except compound E, which exhibited a rapid initial inhibition of 3H‐L‐leucine incorporation at 100μM. The inhibition of 3H‐thymidine incorporation into cells pretreated 4 h with 5μM of compounds A, B, and C was shown to be irreversible. Finally the inhibition of the incorporation of 3H‐thymidine into DNA by A was shown not to be caused by the inhibition of the uptake of the tracer into the acid‐soluble pool. A number of possible explanations for the greater sensitivity of DNA synthesis and the sequential inhibition of DNA, RNA and protein synthesis at higher concentrations are suggested.

Bibliography

Harder, H. C., & Rosenberg, B. (1970). Inhibitory effects of anti‐tumor platinum compounds on DNA, RNA and protein syntheses in mammalian cells in vitro. International Journal of Cancer, 6(2), 207–216. Portico.

Authors 2
  1. Harold C. Harder (first)
  2. Barnett Rosenberg (additional)
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Dates
Type When
Created 18 years, 6 months ago (Feb. 19, 2007, 8:15 a.m.)
Deposited 1 year, 9 months ago (Nov. 12, 2023, 4:39 a.m.)
Indexed 2 months, 3 weeks ago (June 11, 2025, 4:46 a.m.)
Issued 54 years, 11 months ago (Sept. 15, 1970)
Published 54 years, 11 months ago (Sept. 15, 1970)
Published Online 19 years, 1 month ago (July 18, 2006)
Published Print 54 years, 11 months ago (Sept. 15, 1970)
Funders 0

None

@article{Harder_1970, title={Inhibitory effects of anti‐tumor platinum compounds on DNA, RNA and protein syntheses in mammalian cells in vitro}, volume={6}, ISSN={1097-0215}, url={http://dx.doi.org/10.1002/ijc.2910060207}, DOI={10.1002/ijc.2910060207}, number={2}, journal={International Journal of Cancer}, publisher={Wiley}, author={Harder, Harold C. and Rosenberg, Barnett}, year={1970}, month=sep, pages={207–216} }