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

The effect of 3'-deoxyadenosine N(1)-oxide on growth in vitro and in vivo on Ehrlich ascites tumor and on a human squamous lung cell carcinoma xenograft in nude mice.

The effect of 3'-deoxyadenosine N(1)-oxide (3'-dANO) on Ehrlich ascites tumor and a human squamous lung cell carcinoma was investigated. The 3'-dANO concentration that inhibited the cell growth 50% (IC(50)) in Ehrlich ascites tumor cells in vitro was 0.15 mM, and the killing efficiency concentration (concentration of the drug that kills all cells) was 1 mM. By simultaneous administration of 3'-dANO and the adenosine deaminase inhibitor erythro-9-(2-hydroxyl-3-nonyl) adenine (EHNA), the IC(50) of 3'-dANO was unchanged, but the killing efficiency concentration of 3'dANO was reduced to 0.3 mM. When mice bearing Ehrlich ascites tumor were treated i.p. with 3'-dANO doses of 200 mg/kg daily for 4 days, the mean increased life span (ILS) was 200%. 3'-dANO in combination with EHNA did not further increase the life span of the tumor-bearing mice. The specific growth delay (SGD) of the Ehrlich tumor and of a human squamous lung cell carcinoma growing subcutaneously in 3'-dANO-treated mice were calculated from Gomperts tumor growth curves. The Ehrlich tumor-bearing mice received 3'-dANO i.p. at doses of 250 mg/kg daily for 4 days, and the nude mice bearing human carcinoma received 3'-dANO i.p. at doses of 225 mg/kg daily for 5 days. The SGD for the investigated tumors were calculated to be 1.0 and 1.1, respectively.[1]

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