title: Antitumor activity of prolonged-release derivative of cytosine arabinoside, cytosine arabinoside-agarose conjugate.
abstract: A prolonged-release derivative of cytosine arabinoside (Ara-C), cytosine arabinoside-agarose bead conjugate (Ara-C-AB), was synthesized and its pharmaceutical and pharmacological characteristics were examined. Ara-C was released successively for considerably long period from Ara-C-AB in vitro. Following intraperitoneal injection of 3H-Ara-C-AB, radioactivity could be detected in plasma and urine of BDF1 mouse for four days, while 3H-Ara-C administered as a free form was excreted completely in the first 24 hr. Increase in lifespan of L1210 leukemia-bearing mice was demonstrated after intraperitoneal injection of Ara-C-AB with both the dosage schedules of three days before and one day after inoculation of L1210 cells at the dose of 30 mg equivalent Ara-C/kg.
mesh_terms: D000818:Animals; D003561:Cytarabine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000378:metabolism; D003692:Delayed-Action Preparations; D007939:Leukemia L1210 / Q000188:drug therapy*; D008297:Male; D051379:Mice
chemical_list: D003692:Delayed-Action Preparations; D003561:Cytarabine