Nelarabine

Nelarabine (Arranon, 506U78) is a purine nucleoside analog converted to its corresponding arabinosylguanine nucleotide triphosphate (araGTP), resulting in inhibition of DNA synthesis and cytotoxicity. Nelarabine is well tolerated and has significant antitumor activity in T-cell acute lymphoblastic leukemia (T-ALL) and lymphoma (T-LBL). Nelarabine (506U78) has activity in T-cell malignancies, as evaluated in 2 Phase I and 5 Phase II studies. The mRNA levels of the transporters ENT1 and ENT2 were higher in Nelarabine-sensitive than -resistant samples.