Enhancing effect of bromovinyldeoxyuridine on antitumor activity of 5-fluorouracil against adenocarcinoma 755 in mice. Increased therapeutic index and correlation with increased plasma 5-fluorouracil levels.

Abstract:

:A marked inhibition of the growth of solid tumor adenocarcinoma 755 was achieved by the combination of 5-fluorouracil (5-FU) with bromovinyldeoxyuridine (BVDU). The therapeutic index (LD50/ED50) for the combination of BVDU plus 5-FU was 8.1 and 3.9 upon intraperitoneal (i.p.) or oral (p.o.) administration, respectively. The therapeutic index of i.p. 5-FU given alone was 2.3, whereas for p.o. 5-FU given alone no therapeutic index could be established because of insufficient activity of the compound. Thus, the therapeutic index of 5-FU increased significantly when combined with BVDU. Pharmacokinetic studies revealed that upon i.p. or p.o. 5-FU administration plasma 5-FU levels rapidly declined, but that, in the combination with BVDU, the plasma clearance of 5-FU, especially following p.o. administration, was slowed down considerably. Antitumor activity of 5-FU correlated with AUC (area under the concentration x time curve), within the plasma 5-FU concentration range from 0.02 to 0.4 microgram/ml.

journal_name

Biochem Pharmacol

journal_title

Biochemical pharmacology

authors

Iigo M,Araki E,Nakajima Y,Hoshi A,De Clercq E

doi

10.1016/0006-2952(88)90025-1

subject

Has Abstract

pub_date

1988-04-15 00:00:00

pages

1609-13

issue

8

eissn

0006-2952

issn

1873-2968

pii

0006-2952(88)90025-1

journal_volume

37

pub_type

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