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
Kr. Svendsen et al., 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, Cancer investigation, 14(1), 1996, pp. 19-24
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% (IC50) in Ehr
lich ascites tumor cells in vitro was 0.15 mM, and the killing efficie
ncy concentration (concentration of the drug that kills all cells) was
1 mM. By simultaneous administration of 3'-dANO and the adenosine dea
minase 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 tu
mor 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 hu
man squamous lung cell carcinoma growing subcutaneously in 3'-dANO-tre
ated mice were calculated from Gomperts tumor growth curves. The Ehrli
ch tumor-bearing mice received 3'-dANO i.p, at doses of 250 mg/kg dail
y for 4 days, and the nude mice bearing human carcinoma received 3'-dA
NO i.p. at doses of 225 mg/kg daily for 5 days. The SGD for the invest
igated tumors were calculated to be 1.0 and 1.1, respectively.