title: Differences in the stimulation of repair replication by 3-aminobenzamide in lymphoblastoid cells damaged by methylmethanesulfonate or ultraviolet light.
abstract: Human lymphoblastoid cells damaged by u.v. light accumulated DNA breaks in the presence of cytosine arabinoside and hydroxyurea at a frequency similar to that of cells damaged by methylmethanesulfonate. 3-Aminobenzamide (1 mM) reduced the net strand-break frequency detected after either kind of damage. Repair replication, however, was stimulated only in methylmethanesulfonate-damaged cells. This stimulation is therefore not related directly to the DNA strand-break frequencies and concomitant poly(ADP-ribose) synthesis, but depends on some other cellular response specific to alkylating agents.
mesh_terms: D001549:Benzamides / Q000494:pharmacology*; D002478:Cells, Cultured; D004249:DNA Damage; D004260:DNA Repair / Q000187:drug effects*; D004261:DNA Replication / Q000187:drug effects*; D006801:Humans; D008214:Lymphocytes / Q000187:drug effects* / Q000528:radiation effects; D008741:Methyl Methanesulfonate / Q000633:toxicity; D011064:Poly Adenosine Diphosphate Ribose / Q000096:biosynthesis; D014466:Ultraviolet Rays
chemical_list: D001549:Benzamides; D011064:Poly Adenosine Diphosphate Ribose; C025160:3-aminobenzamide; D008741:Methyl Methanesulfonate