NCIt definition : A synthetic guanine derivative with antiviral activity. As the active metabolite of
ganciclovir, ganciclovir-5-triphosphate (ganciclovir-TP) appears to inhibit viral
DNA synthesis by competitive inhibition of viral DNA polymerases and incorporation
into viral DNA, resulting in eventual termination of viral DNA elongation.;
Alternative definition : NCI-GLOSS: An antiviral agent used to prevent or treat cytomegalovirus infections
that may occur when the body's immune system is suppressed. In gene therapy, ganciclovir
is used with an altered herpes simplex virus-1 gene to kill advanced melanoma cells
and brain tumor cells.;