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Gestational nicotine exposure alone or in combination with ethanol down-modulates offspring immune function.
P V Basta1, K B Basham, W P Ross
1Centers of Bioorganic Chemistry and Life Sciences and Toxicology, Research Triangle Institute, PO Box 12194, 3040 Cornwallis Road, Research Triangle Park, NC 27709, USA. pvb@rti.org
International Journal of Immunopharmacology
|February 24, 2000
Summary
Prenatal nicotine exposure, alone or with ethanol, significantly suppresses offspring immune cell proliferation long-term. These effects on T and B cells persist into adulthood, impacting immune function.
Area of Science:
- Immunology
- Developmental Toxicology
- Neuroscience
Background:
- Prenatal exposure to environmental toxins can disrupt organ development.
- Nicotine and ethanol are common teratogens with known effects on fetal development.
- The impact of combined prenatal nicotine and ethanol exposure on immune system development is not fully understood.
Purpose of the Study:
- To investigate the long-term effects of gestational nicotine exposure, alone and combined with ethanol, on offspring immune function.
- To assess the impact on T and B cell proliferation and splenocyte beta-adrenergic receptor binding.
Main Methods:
- Timed pregnant rats were exposed to nicotine, ethanol, or both during gestation.
- Offspring T and B cell proliferation was measured in response to mitogens (Concanavalin A, lipopolysaccharide).
- Splenocyte beta(2)-adrenoceptor binding was quantified at various postnatal ages.
Main Results:
- Both nicotine and combined nicotine+ethanol exposure suppressed T and B cell proliferation, similar to ethanol alone.
- This immune suppression persisted into adulthood.
- Combined exposure reduced spleen beta-adrenergic receptor binding, unlike individual exposures.
Conclusions:
- Prenatal nicotine exposure causes lasting suppression of immune cell proliferative responses in offspring.
- Combined prenatal nicotine and ethanol exposure may lead to more severe immune deficits in adulthood.
- These findings highlight the critical vulnerability of the developing immune system to teratogenic exposures.