Cited by 57Prenatal Substance Exposure EffectsSmoking Behavior and CessationNicotinic Acetylcholine Receptors Study

Cognitive and behavioral impairments evoked by low-level exposure to tobacco smoke components: comparison with nicotine alone

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Hall, Brandon J., Cauley, Marty, Burke, Dennis A., Kiany, Abtin, Slotkin, Theodore A., Levin, Edward D.·2016·Toxicological Sciences

Abstract

Active maternal smoking has adverse effects on neurobehavioral development of the offspring, with nicotine (Nic) providing much of the underlying causative mechanism. To determine whether the lower exposures caused by second-hand smoke are deleterious, we administered tobacco smoke extract (TSE) to pregnant rats starting preconception and continued through the second postnatal week, corresponding to all 3 trimesters of fetal brain development. Dosing was adjusted to produce maternal plasma Nic concentrations encountered with second-hand smoke, an order of magnitude below those seen in active smokers. We then compared TSE effects to those of an equivalent dose of Nic alone, and to a 10-fold higher Nic dose. Gestational exposure to TSE and Nic significantly disrupted cognitive and behavioral function in behavioral tests given during adolescence and adulthood (postnatal weeks 4-40), producing hyperactivity, working memory deficits, and impairments in emotional processing, even at the low exposure levels corresponding to second-hand smoke. Although TSE effects were highly correlated with those of Nic, the effects of TSE were much larger than could be attributed to just the Nic in the mixture. Indeed, TSE effects more closely resembled those of the 10-fold higher Nic levels, but still exceeded their magnitude. In combination with our earlier findings, this study thus completes the chain of causation to prove that second-hand smoke exposure causes neurodevelopmental deficits, originating in disruption of neurodifferentiation, leading to miswiring of neuronal circuits, and as shown here, culminating in behavioral dysfunction. As low level exposure to Nic alone produced neurobehavioral teratology, 'harm reduction' Nic products do not abolish the potential for neurodevelopmental damage.

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Authors
Hall, B. J., Cauley, M., Burke, D. A., Kiany, A., Slotkin, T. A., & Levin, E. D.
Affiliations
Duke University (US)
Corresponding author
Levin, Edward D.
Venue
Toxicological Sciences
Published
2016-02-26
Volume
151
Issue
2
Pages
236-244
ISSN
  • 1096-0929 (ISSN-L)
  • 1096-6080
OpenAlex
W2288701263
Cited by
57
References
37
Citations by year
2026: 2 · 2025: 3 · 2024: 4 · 2023: 3 · 2022: 4 · 2021: 6 · 2020: 3 · 2019: 13 · 2018: 9 · 2017: 4 · 2016: 5 · 2013: 1
FWCI
12.02
Type
journal article
Language
en
Open access
Locations
  • Toxicological Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • U.S. Environmental Protection Agency (83543701)
  • Acorda Therapeutics
  • National Institutes of Health (ES022831)
  • National Institute of Environmental Health Sciences (P01ES022831)
Topics
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Prenatal Substance Exposure Effects
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
Keywords
passive smoking, nicotine, prenatal exposure, fetal brain development, neurodevelopmental deficits, hyperactivity, working memory deficits, emotional processing, maternal smoking
MeSH terms
Age Factors, Animals, Behavior, Animal, Cognition, Cognition Disorders, Emotions, Female, Gestational Age, Male, Memory, Memory Disorders, Motor Activity, Nicotine, Pregnancy, Prenatal Exposure Delayed Effects, Tobacco Smoke Pollution, Rats, Sprague-Dawley, Risk Assessment, Nicotinic Agonists, Maze Learning, Recognition, Psychology

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