title: Effect of inhibitor of poly (ADP-ribose) polymerase in blood lymphocyte cultures of untreated leprosy patients.
abstract: Poly (ADP-ribose) polymerase is a cellular repair enzyme synthesised following damage to DNA. 3-Aminobenzamide (3-AB) is an inhibitor of this repair enzyme. To study repair efficiency in leprosy patients, who usually show a significantly higher frequency of spontaneous chromosome aberrations and sister-chromatid exchanges (SCEs), their blood lymphocyte cultures were treated with 3-AB. A marginal increase in the frequency of chromosome aberrations was observed following treatment with 3-AB in controls as well as in patient groups. There was also no significant difference in the frequency of SCEs in control cultures with or without 3-AB. A significant increase in the frequency of SCEs was observed in lymphocyte cultures of paucibacillary (PB) and multibacillary (MB) patients treated with 3-AB when compared with controls. Observation of a significant increase in the frequency of SCEs in 3-AB-treated cultures over the untreated value indicates that DNA damage caused in leprosy patients following mycobacterial infection is not repaired because of the presence of the inhibitor of repair enzyme.
mesh_terms: D001549:Benzamides / Q000494:pharmacology*; D002478:Cells, Cultured; D002869:Chromosome Aberrations; D004260:DNA Repair / Q000187:drug effects*; D006801:Humans; D007918:Leprosy / Q000235:genetics*; D008214:Lymphocytes / Q000648:ultrastructure; D008297:Male; D011064:Poly Adenosine Diphosphate Ribose / Q000502:physiology*; D000067856:Poly(ADP-ribose) Polymerase Inhibitors; D012854:Sister Chromatid Exchange / Q000187:drug effects
chemical_list: D001549:Benzamides; D000067856:Poly(ADP-ribose) Polymerase Inhibitors; D011064:Poly Adenosine Diphosphate Ribose; C025160:3-aminobenzamide