title: Protective effect of tannic acid on the brain of adult rats exposed to cadmium and lead.
abstract: Chronic exposure to Cd and Pb causes brain damage. Tannic acid (TA) is a very efficient chelator for metals. The effect of exposure to Cd and/or Pb and TA on the rats' brain were studied. Two experiments were carried. In experiment no. 1 metals were administered with feed (7mg Cd and 50mgPb/kg) and TA with drink (0, 0.5, 1, 1.5, 2 or 2.5% solutions). In experiment no. 2, rats received an aqueous solutions of [Cd (7 or 14mg/L) or Pb (50 or 100mg/L)] or 2% TA, alternatively every 7 days. In both experiments, TA had a positive effect only on reducing the accumulation of Cd. Exposure to metals resulted in an decrease of superoxide dismutase and catalase activity, whereas TA administration increased those. The results suggests that TA are more effective if taken parallel to food contaminated by Cd, and their effectiveness is higher if their intake is long-term.
authors.affiliation: Department of Bromatology and Food Physiology, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland. anna.mieczan@up.lublin.pl
authors.forename: Anna
authors.initials: A
authors.lastname: Winiarska-Mieczan
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects* / Q000378:metabolism; D002104:Cadmium / Q000493:pharmacokinetics / Q000633:toxicity*; D002374:Catalase / Q000378:metabolism; D007854:Lead / Q000493:pharmacokinetics / Q000633:toxicity*; D008297:Male; D018696:Neuroprotective Agents / Q000008:administration & dosage*; D051381:Rats; D017208:Rats, Wistar; D013482:Superoxide Dismutase / Q000378:metabolism; D013634:Tannins / Q000008:administration & dosage*
chemical_list: D018696:Neuroprotective Agents; D013634:Tannins; D002104:Cadmium; D007854:Lead; D002374:Catalase; D013482:Superoxide Dismutase