Floxuridine
is a pyrimidine analog that acts as an inhibitor of the S-phase of corpuscle
division. This selectively kills rapidly adding cells. Floxuridine is an
anti-metabolite. Anti-metabolites masquerade as pyramidine-like molecules which
prevents accustomed pyrimidines from getting congenital into DNA during the S
appearance of the corpuscle cycle. Flurouracil (the end-product of catabolism
of floxuridine) blocks an agitator which converts cytosine nucleosides into the
deoxy derivative. In addition, DNA amalgam is added inhibited because
fluoruracil blocks the assimilation of the thymdine nucleotide into the DNA
strand.
Floxuridine
is rapidly catabolized to 5-fluorouracil, which is the alive anatomy of the
drug. The primary aftereffect is arrest with DNA amalgam and to a bottom
extent, inhibition of RNA accumulation through the drug's assimilation into
RNA, appropriately arch to the assembly of counterfeit RNA. Fluorouracil aswell
inhibits uracil riboside phophorylase, which prevents the appliance of preformed
uracil in RNA synthesis. As well, the monophosphate of floxuridine,
5-fluoro-2'-deoxyuridine-5'-phosphate (FUDR-MP) inhibits the agitator
thymidylate synthetase. This leads to the inhibition of methylation of
deoxyuridylic acid to thymidylic acid, appropriately interfering with DNA
synthesis.