title: Evaluation of in vitro anti-genotoxic potential of melatonin against arsenic and fluoride in human blood cultures.
abstract: Melatonin has been known for its anti-oxidant potential but not much studied for the anti-genotoxic potential. The current study elucidate the role of melatonin against in vitro genotoxicity by arsenic (As) and fluoride (F). Human peripheral blood cultures were exposed to As (1.4 microM) and F (34 microM), alone and in combination, with and without melatonin (0.2 mM). Ethyl methane sulphonate (EMS; 1.9 mM) was selected as the positive control to analyze the genotoxic parameters like sister chromatid exchanges (SCEs), cell cycle proliferative index (CCPI) and primary DNA damage. The frequency of SCE/cell, SCE/chromosome and primary DNA damage reduced significantly (p<0.001) accompanied with a marked increase in CCPI upon addition of melatonin. Similarly marked recovery was attained by melatonin from As and F induced primary DNA damage as studied using comet assay. The results clearly indicate towards the protection of lymphocytes from toxic effects af As and F by melatonin in vitro.
authors.affiliation: Biochemistry Department, P D Patel Institute of Applied Sciences, Education Campus Changa, Charotar University of Science and Technology, At&PO Petlad, Anand, 388 421, Gujarat, India. hemlata.pant@gmail.com
authors.forename: Hemlata Hemant
authors.initials: HH
authors.lastname: Pant
authors.forename: Mandava Venkateshvara
authors.initials: MV
authors.lastname: Rao
mesh_terms: D000328:Adult; D016587:Antimutagenic Agents / Q000494:pharmacology*; D001151:Arsenic / Q000633:toxicity; D002478:Cells, Cultured; D020552:Comet Assay; D004249:DNA Damage; D005459:Fluorides / Q000633:toxicity; D006801:Humans; D008214:Lymphocytes / Q000187:drug effects* / Q000378:metabolism; D008550:Melatonin / Q000494:pharmacology*; D009153:Mutagens / Q000633:toxicity*; D012854:Sister Chromatid Exchange / Q000187:drug effects; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D055815:Young Adult
chemical_list: D016587:Antimutagenic Agents; D009153:Mutagens; D014874:Water Pollutants, Chemical; D008550:Melatonin; D001151:Arsenic; D005459:Fluorides