title: Nitrobenzylthioinosine-insensitive uridine transport in human lymphoblastoid and murine leukemia cells.
abstract: Both human lymphoblastoid (RPMI 6410) and murine leukemia (L1210) cells were found to have a component of uridine transport which is insensitive to the nucleoside transport inhibitor nitrobenzylthioinosine (NBMPR). In both cell lines NBMPR-insensitive uridine transport is inhibited by other nucleosides and by the sulfhydryl reagent p-chloromercuribenzenesulfonate. In RPMI 6410 cells NBMPR-insensitive transport accounts for only 2% of the initial rate of uridine transport. In contrast, 20% of the initial rate of transport of L1210 cells is insensitive to NBMPR, and uridine uptake over longer periods (10 min) is completely insensitive to NBMPR.
mesh_terms: D002731:4-Chloromercuribenzenesulfonate / Q000494:pharmacology; D000818:Animals; D001693:Biological Transport, Active / Q000187:drug effects; D006801:Humans; D066298:In Vitro Techniques; D007288:Inosine / Q000031:analogs & derivatives*; D007939:Leukemia L1210 / Q000378:metabolism*; D008214:Lymphocytes / Q000187:drug effects / Q000378:metabolism*; D051379:Mice; D009705:Nucleosides / Q000494:pharmacology; D013868:Thioinosine / Q000031:analogs & derivatives* / Q000494:pharmacology; D014529:Uridine / Q000378:metabolism*
chemical_list: D009705:Nucleosides; D013868:Thioinosine; D007288:Inosine; D002731:4-Chloromercuribenzenesulfonate; C001789:4-nitrobenzylthioinosine; D014529:Uridine