title: Effect of lead on the activity of erythrocyte porphobilinogen deaminase in vivo and in vitro.
abstract: The effect of lead on the activity of erythrocyte porphobilinogen deaminase (PBGD) in vivo and in vitro was investigated using blood specimens obtained from controls and lead-exposed workers. When lead nitrate was added to the incubation mixture at a final concentration of 10(-4) M, 83% inhibition of erythrocyte PBGD activity was found. However, in workers occupationally exposed to lead, no inhibition of erythrocyte PBGD activity was detected. This finding indicates that the erythrocyte PBGD test is not useful for evaluating exposure to lead in workers. In addition, the in vitro study confirmed that mercuric chloride strongly inhibits erythrocyte PBGD activity.
authors.affiliation: Department of Community Health Science, Saga Medical School, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Tomokuni
authors.forename: M
authors.initials: M
authors.lastname: Ichiba
mesh_terms: D000642:Ammonia-Lyases / Q000037:antagonists & inhibitors*; D002851:Chromatography, High Pressure Liquid; D004912:Erythrocytes / Q000201:enzymology*; D006801:Humans; D011163:Hydroxymethylbilane Synthase / Q000037:antagonists & inhibitors*; D066298:In Vitro Techniques; D007854:Lead / Q000633:toxicity*; D007855:Lead Poisoning / Q000097:blood / Q000175:diagnosis / Q000201:enzymology; D008627:Mercuric Chloride / Q000633:toxicity; D008670:Metals / Q000633:toxicity; D009566:Nitrates / Q000633:toxicity*
chemical_list: D008670:Metals; D009566:Nitrates; D007854:Lead; D008627:Mercuric Chloride; C017461:lead nitrate; D011163:Hydroxymethylbilane Synthase; D000642:Ammonia-Lyases