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Aluminum toxicity. Hematological effects.

S Mahieu1, M del Carmen Contini, M Gonzalez

  • 1Cátedra de Fisiología Humana, Facultad de Bioquímica y de Ciencas Biológicas, Universidad Nacional del Litoral, Ciudad Universitaria, Santa Fe, Argentina. smahieu@fbcb.unl.edu.ar

Toxicology Letters
|January 22, 2000
PubMed
Summary

Chronic aluminum exposure in rats causes microcytic anemia and decreased MCH, but prolonged exposure may lead to recovery of red blood cells. Renal function remains unaffected.

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Area of Science:

  • Toxicology
  • Hematology
  • Environmental Health

Background:

  • Aluminum (Al) exposure is a growing concern, with potential hematotoxic effects linked to uremia.
  • Understanding the sequential impact of aluminum hydroxide intoxication on blood parameters is crucial for assessing long-term health risks.

Purpose of the Study:

  • To investigate the sequential hematological and iron metabolism effects of chronic aluminum hydroxide intoxication in rats.
  • To evaluate changes in renal function concurrently with hematological parameters during aluminum exposure.

Main Methods:

  • Rats were administered aluminum hydroxide (80 mg/Kg) intraperitoneally, three times weekly, from weaning up to 28 weeks.
  • Hematological parameters (RBC, MCH, MCV) and iron metabolism markers were assessed monthly.

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  • Renal function was monitored throughout the 6-month exposure period.

    • Main Results:

    • Aluminum exposure induced microcytosis and decreased mean corpuscular hemoglobin (MCH) and mean corpuscular volume (MCV).
    • Initially, red blood cell counts (RBC) decreased, but significantly increased by the 6th month compared to controls.
    • Lower serum iron and transferrin saturation were observed, indicating impaired iron metabolism.

    Conclusions:

    • Microcytic anemia is an indicator of chronic aluminum exposure.
    • Prolonged exposure can lead to a partial recovery of hematocrit and hemoglobin, but microcytosis and reduced MCH persist.
    • Aluminum hydroxide intoxication did not affect renal function in the studied rats.