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Abstract:

Two freshwater invertebrate organisms, Biomphalaria glabrata and Lumbriculus variegatus, were tested as potential experimental animal models to assess Pb exposure using acute laboratory bioassays. Since long, the enzyme δ-aminolevulinic acid dehydratase (ALA-D) has been recognised as a useful biomarker of Pb exposure and effect. Therefore, determinations of ALA-D activity were performed in the whole body soft tissues of pigmented and non-pigmented gastropods B. glabrata and in the oligochaete L. variegatus. The organisms were exposed to varying concentrations of Pb for 48 h. Levels of Pb in the invertebrates were also analysed. Highly significant negative correlations were found between the enzymatic activity and the levels of Pb exposure, and also between the enzymatic activity and the metal incorporated by the invertebrates. No significant differences were found in the enzyme activity nor in the resulting metal accumulation based on gastropod pigmentation. The values of Pb concentration that produce 50% of inhibition on the enzyme activity (EIC 50) were 0.023 and 0.029 mg Pb/L for pigmented and non-pigmented B. glabrata, respectively. A much higher value was found for L. variegatus (0.703 mg Pb/L). The non-observed effect concentration (NOEC) on enzyme activity for the oligochaetes was 0.05 mg Pb/L, about twice the EIC50 calculated for the gastropods. These data showed that both pigmented and non-pigmented B. glabata were much more sensitive organisms than the oligochaetes. The differences in enzyme inhibition could be attributed, at least partly, to differences in the metal body burden found between the organisms, since levels of Pb accumulated by B. glabrata were approximately three times higher compared to those observed in L. variegatus. Therefore B. glabrata showed to be a more suitable and reliable bioindicator organism for assessing Pb contamination in aquatic ecosystems, especially at low levels of metal exposure. © 2005 Elsevier Ireland Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Comparative study on two freshwater invertebrates for monitoring environmental lead exposure
Autor:Aisemberg, J.; Nahabedian, D.E.; Wider, E.A.; Verrengia Guerrero, N.R.
Filiación:Department of Biological Chemistry, University of Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:Bioindicators; Biomarkers; Biomphalaria glabrata; Lumbriculus variegatus; Pb; δ-Aminolevulinic acid dehydratase; biological marker; fresh water; lead; porphobilinogen synthase; animal tissue; annelid worm; aquatic environment; article; Biomphalaria; blood level; calculation; comparative study; comparative toxicology; concentration (parameters); environmental monitoring; enzyme activity; enzyme inhibition; gastropod; invertebrate; lumbriculus variegatus; metal binding; nonhuman; priority journal; soft tissue; water contamination; Animalia; Biomphalaria glabrata; Gastropoda; Invertebrata; Lumbriculus variegatus; Oligochaeta (Metazoa)
Año:2005
Volumen:210
Número:1
Página de inicio:45
Página de fin:53
DOI: http://dx.doi.org/10.1016/j.tox.2005.01.005
Título revista:Toxicology
Título revista abreviado:Toxicology
ISSN:0300483X
CODEN:TXCYA
CAS:lead, 7439-92-1, 13966-28-4; porphobilinogen synthase, 9036-37-7
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0300483X_v210_n1_p45_Aisemberg

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Citas:

---------- APA ----------
Aisemberg, J., Nahabedian, D.E., Wider, E.A. & Verrengia Guerrero, N.R. (2005) . Comparative study on two freshwater invertebrates for monitoring environmental lead exposure. Toxicology, 210(1), 45-53.
http://dx.doi.org/10.1016/j.tox.2005.01.005
---------- CHICAGO ----------
Aisemberg, J., Nahabedian, D.E., Wider, E.A., Verrengia Guerrero, N.R. "Comparative study on two freshwater invertebrates for monitoring environmental lead exposure" . Toxicology 210, no. 1 (2005) : 45-53.
http://dx.doi.org/10.1016/j.tox.2005.01.005
---------- MLA ----------
Aisemberg, J., Nahabedian, D.E., Wider, E.A., Verrengia Guerrero, N.R. "Comparative study on two freshwater invertebrates for monitoring environmental lead exposure" . Toxicology, vol. 210, no. 1, 2005, pp. 45-53.
http://dx.doi.org/10.1016/j.tox.2005.01.005
---------- VANCOUVER ----------
Aisemberg, J., Nahabedian, D.E., Wider, E.A., Verrengia Guerrero, N.R. Comparative study on two freshwater invertebrates for monitoring environmental lead exposure. Toxicology. 2005;210(1):45-53.
http://dx.doi.org/10.1016/j.tox.2005.01.005