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Related Experiment Videos

Plasma prolactin concentrations in lead exposed workers.

S Govoni, F Battaini, C Fernicola

    Journal of Environmental Pathology, Toxicology and Oncology : Official Organ of the International Society for Environmental Toxicology and Cancer
    |March 1, 1987
    PubMed
    Summary

    Occupational lead exposure may disrupt prolactin (Prl) secretion in male workers. Higher blood lead (PbB) and zinc protoporphyrin (Zpp) levels correlated with increased Prl, suggesting potential endocrine dysfunction.

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    Area of Science:

    • Occupational Health
    • Environmental Toxicology
    • Endocrinology

    Background:

    • Lead exposure is a significant occupational hazard, particularly in small industries.
    • Elevated lead levels can affect various physiological systems, including endocrine function.
    • Prolactin (Prl) regulation is complex and sensitive to neurochemical changes.

    Purpose of the Study:

    • To investigate the relationship between lead exposure markers and plasma prolactin levels in male pewter factory workers.
    • To assess potential lead-induced alterations in prolactin secretion.
    • To explore the role of dopaminergic pathways in lead's effect on prolactin.

    Main Methods:

    • Measurement of plasma prolactin (Prl), zinc protoporphyrin (Zpp), and blood lead concentrations (PbB) in 76 male workers.

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  • Random selection from workers in small pewter factories under regular occupational health surveillance.
  • Statistical comparison of Prl levels between subgroups with high (>40 µg/dL) and low (<40 µg/dL) Zpp and PbB.

    • Main Results:

    • All measured plasma prolactin values were within the normal range.
    • Workers with Zpp and PbB >40 µg/dL exhibited a 47% higher mean plasma prolactin level compared to those with levels <40 µg/dL.
    • A significant positive correlation was observed between elevated lead exposure markers and prolactin levels.

    Conclusions:

    • Lead exposure may induce prolactin secretion dysfunction in male workers.
    • This dysfunction is potentially mediated by a reduction in dopaminergic inhibitory control.
    • Findings highlight the need for monitoring endocrine function in lead-exposed populations.