title: Induction of intracisternal type A particles by 5-bromo-2'-deoxyuridine in rat hepatoma cells.
abstract: Electron microscopic examination of hepatoma tissue culture (HTC) cells revealed low numbers of intracisternal type A particles (IAP) and type C viruses. Exposure of HTC cells to either 10(-4) or 10(-5) M5-bromo-2'-deoxyuridine (BUdR) caused a more than 50-fold increase in the number of IAP observed with the electron microscope. The number of IAP increased after only 2 days of growth in 10(-5) M BUdR, whereas 3 days of growth in 10(-4) m BUdR were necessary to observe an increase. A 2-day pulse of 10(-4) M BUdR was also sufficient to cause the increase in type A particles, provided the cells were continued in culture for another 2 days. Unlike many other cell lines, HTC cells treated with BUdR did not show an increase in type C viruses. This conclusion was based on the observations that BUdR treatment caused no detectable increase in extracellular particulate viral reverse transcriptase or in viral RNA complementary to a DNA probe made to a rat endogenous type C virus (RaLV).
mesh_terms: D000818:Animals; D001973:Bromodeoxyuridine / Q000494:pharmacology*; D006528:Carcinoma, Hepatocellular / Q000382:microbiology* / Q000648:ultrastructure; D002478:Cells, Cultured; D007181:Inclusion Bodies, Viral / Q000187:drug effects*; D008113:Liver Neoplasms / Q000382:microbiology* / Q000648:ultrastructure; D009374:Neoplasms, Experimental / Q000382:microbiology; D051381:Rats; D012190:Retroviridae / Q000187:drug effects / Q000302:isolation & purification; D014779:Virus Replication / Q000187:drug effects
chemical_list: D001973:Bromodeoxyuridine