title: Cell cycle synchronization of the mouse S-180 tumor following alternating period of hydroxyurea-blockade and release.
abstract: An attempt at synchronization was carried out by intravenous administration of hydroxyurea (HU) into mice bearing the S-180 solid tumor. Following HU blockade for 6.0 hrs equal to (Tc-Ts) period, 65% of all tumor cells were in S-phase. After 2 cycle blockade; HU blockade for 6 hrs, released for 7.5 hrs and reestablished for 6 hrs, 84% of tumor cells were gathered in S-phase with a sharp peak at G1-S junction. Appropriate cycles of HU infusion and release will synchronize significant increments of S-phase or mitotic cells in the S-180 tumor during predictable time intervals.
mesh_terms: D000818:Animals; D002453:Cell Cycle / Q000187:drug effects*; D004273:DNA, Neoplasm / Q000096:biosynthesis; D006918:Hydroxyurea / Q000494:pharmacology*; D007399:Interphase / Q000187:drug effects; D008297:Male; D051379:Mice; D008940:Mitotic Index; D012510:Sarcoma 180 / Q000473:pathology*
chemical_list: D004273:DNA, Neoplasm; D006918:Hydroxyurea