1984
DOI: 10.1111/j.1751-0813.1984.tb07139.x
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Blood lead, urinary delta aminolevulinic acid and the diagnosis of lead poisoning in dogs

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Cited by 8 publications
(8 citation statements)
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References 7 publications
(4 reference statements)
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“…The activity of aminolevulinic acid dehydratase (ALA-D), an enzyme in the heme synthesis pathway, is negatively correlated with lead. Consequently, the conversion of delta-aminolevulinic acid (ALA) to porphobilinogen by ALA-D is disturbed leading to elevated concentrations in blood and urine of ALA in lead poisoned dogs [ 20 , 29 ]. Penumarthy et al [ 30 ] fed 0 mg (control), 2 mg and 5 mg lead as lead acetate/kg bw/day to two-month old beagles for 13 weeks.…”
Section: Resultsmentioning
confidence: 99%
“…The activity of aminolevulinic acid dehydratase (ALA-D), an enzyme in the heme synthesis pathway, is negatively correlated with lead. Consequently, the conversion of delta-aminolevulinic acid (ALA) to porphobilinogen by ALA-D is disturbed leading to elevated concentrations in blood and urine of ALA in lead poisoned dogs [ 20 , 29 ]. Penumarthy et al [ 30 ] fed 0 mg (control), 2 mg and 5 mg lead as lead acetate/kg bw/day to two-month old beagles for 13 weeks.…”
Section: Resultsmentioning
confidence: 99%
“…However, the blood Pb concentration does not necessarily reflect previous or intermittent exposure because blood Pb concentrations are strongly influenced by recent exposure. 4 Furthermore, individual differences in response to elevated blood Pb concentrations have been documented. A study 4 of dogs with elevated blood Pb concentrations found that some individuals with high blood Pb concentrations did not have the expected clinical signs of Pb poisoning.…”
Section: Discussionmentioning
confidence: 99%
“…4 Furthermore, individual differences in response to elevated blood Pb concentrations have been documented. A study 4 of dogs with elevated blood Pb concentrations found that some individuals with high blood Pb concentrations did not have the expected clinical signs of Pb poisoning. Because one mechanism by which Pb acts is by inhibition of erythrocyte ALAD, which is an early step in the synthesis of heme for erythrocytes, the substrate of this enzyme, ALA, has been proposed 7 as another biomarker for Pb exposure.…”
Section: Discussionmentioning
confidence: 99%
“…No que se refere aos efeitos adversos do excesso de chumbo, é conhecido que sua toxicidade pode implicar em sinais gastrintestinais (ZOOK, 1972;BERNY et al, 1992), desordens neurológicas com prevalência de degeneração e necrose de neurônios corticais (ZOOK, 1972), lesões em lóbulos occipital e parietal, assim como em células de Purkinje e hipocampo (HOGASEN et al, 2016). Também já foi demonstrado que o chumbo pode acarretar em prejuízo ao sistema hematopoiético (CANFIELD et al, 1984;HUERTER, 2000) e efeitos prejudiciais aos rins, tais como: nefropatia de túbulo proximal, glomeruloesclerose, fibrose intersticial, proteinúria e redução da taxa de filtração glomerular (HOGASEN et al, 2016). O NMT de chumbo foi estabelecido baseado em um trabalho no qual não se observou efeitos adversos relacionados ao consumo de uma dieta com 10mg/kg de chumbo em cães por um período de dois anos (AZAR et al, 1973).…”
Section: Discussionunclassified
“…O chumbo também pode prejudicar o sistema hematopoiético, isso ocorre principalmente em consequência do prejuízo sobre a síntese do grupo heme, pois a enzima ácido delta-aminolevulínico desidratase (ALA-D), que participa dessa síntese, tem sua atividade inibida pelo chumbo. Portanto, a conversão do ácido delta aminolevulínico (ALA) em porfobilinogênio através da ALA-D é prejudicada, isso resulta em elevadas concentrações de ALA na corrente circulatória e urina (CANFIELD et al, 1984;HUERTER, 2000).…”
Section: Chumbo (Pb)unclassified