Biological Trace Element Research

, Volume 109, Issue 1, pp 75–89 | Cite as

An assessment of time-dependent effects of lead exposure in algerian mice (Mus spretus) using different methodological approaches

  • C. C. Marques
  • A. C. Nunes
  • T. Pinheiro
  • P. A. Lopes
  • M. C. Santos
  • A. M. Viegas-Crespo
  • M. G. Ramalhinho
  • M. L. Mathias
Original Articles

Abstract

Time-dependent effects of lead (Pb) toxicity were studied in Algerian mice (Mus spretus) treated with Pb acetate via drinking water (1 g Pb acetate/L) for different periods of exposure (15, 45, and 90 d). End points included the determination of hepatic Pb concentration and the assessment of some morphophysiological, biochemical and cytogenetical parameters. A control group receiving distilled water was also monitored for comparative purposes. Hepatic Pb accumulation increased with the time of exposure and was significantly higher in treated mice when compared to controls. In association with significant body mass loss in Pb-exposed mice, for 15 and 45 d, a significant increase in the relative spleen mass was observed after 45 d of intoxication. Pb-exposed mice also showed significant decreases in red blood cells, hematocrit, and mean corpuscular hemoglobin. On the contrary, changes in plasma transferases (aspartate aminotransferase and alanine aminotransferase) and hepatic superoxide dismutase activities did not reach statistical significance. A significant increase in the frequency of micronucleated polychromatic bone marrow erythrocytes was also found in the 90-d-exposed mice, compared to nontreated mice and the other exposed groups. Exposure to Pb acetate resulted also in a slight time-dependent decrease of the polychromatic-normochromatic ratio. These results support the concept that a long-term chronic exposure to Pb induced alterations upon some morphophysiological and genetic paramaters in Algerian mice.

Index Entries

Lead acetate intoxication Mus spretus biomarkers time-dependent effects 

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Copyright information

© Humana Press Inc. 2006

Authors and Affiliations

  • C. C. Marques
    • 1
  • A. C. Nunes
    • 1
  • T. Pinheiro
    • 3
  • P. A. Lopes
    • 1
  • M. C. Santos
    • 2
  • A. M. Viegas-Crespo
    • 1
  • M. G. Ramalhinho
    • 4
  • M. L. Mathias
    • 1
  1. 1.Centro de Biologia Ambiental, Departamento de Biologia AnimalFaculdade de Ciências da Universidade de LisboaLisboaPortugal
  2. 2.Centro Química e Bioquímica, Departamento de Química e BioquímicaFaculdade de Ciências da Universidade de LisboaLisboaPortugal
  3. 3.Laboratório de Feixes de lõesInstituto Tecnológico Nuclear (ITN)SacavémPortugal
  4. 4.Museu Nacional de História Natural (Museu Bocage)Centro de Biologia AmbientalLisboaPortugal

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