Cited by 36Smoking Behavior and CessationNicotinic Acetylcholine Receptors StudyPrenatal Substance Exposure Effects

Nicotine causes age-dependent changes in gene expression in the adolescent female rat brain

Polesskaya, Oksana O., Fryxell, Karl J., Merchant, Amita D., Locklear, Laura L., Ker, Ko-Fei, McDonald, Craig G., Eppolito, Amy K., Smith, Laura N. +2 more·2007·Neurotoxicology and Teratology

Abstract

Humans often start smoking during adolescence. Recent results suggest that rodents may also be particularly vulnerable to nicotine dependence during adolescence. We examined the effect of chronic nicotine exposure on gene expression profiles during adolescence in female rats, who were dosed with nicotine (and control animals were dosed with saline) via subcutaneously implanted osmotic minipumps. Brain samples were collected at four ages: before puberty (postnatal day 25), at about the time of puberty in females (postnatal day 35), and after puberty (postnatal days 45 and 55). The expression of 7931 genes in three brain areas was measured using DNA microarrays. Quantitative RT-PCR was also employed to confirm the expression patterns of selected genes. We used a novel clustering technique (principal cluster analysis) to classify 162 nicotine-regulated genes into five clusters, of which only one (cluster A) showed similar patterns of gene expression across all three brain areas (ventral striatum, prefrontal cortex, and hippocampus). Three clusters of genes (A, B, and C) showed dramatic peaks in their nicotine responses at the same age (p35). The other two clusters (D1 and D2) showed smaller peaks and/or valleys in their nicotine responses at p35 and p45. Thus, the age of maximal gene expression response to nicotine in female rats corresponds approximately to the age of maximal behavioral response and the age of puberty.

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Crossref · 10.1016/j.ntt.2006.11.005

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Authors
Polesskaya, O. O., Fryxell, K. J., Merchant, A. D., Locklear, L. L., Ker, K.-F., McDonald, C. G., Eppolito, A. K., Smith, L. N., Wheeler, T. L., & Smith, R. F.
Affiliations
George Mason University (US)
Corresponding author
Fryxell, Karl J.
Venue
Neurotoxicology and Teratology
Publisher
Elsevier BV
Published
2007-01
Volume
29
Issue
1
Pages
126-140
ISSN
0892-0362 (ISSN-L)
OpenAlex
W2069099310
Cited by
36
References
10
Citations by year
2024: 1 · 2023: 1 · 2022: 4 · 2021: 4 · 2020: 1 · 2017: 1 · 2016: 2 · 2015: 3 · 2014: 2 · 2013: 3 · 2012: 3
FWCI
1.33
Type
journal article
Language
en
Open access
closed
Locations
  • Neurotoxicology and Teratology (publishedVersion)
  • PubMed (publishedVersion)
Funders
George Mason University
Topics
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Prenatal Substance Exposure Effects
Keywords
nicotine, adolescent brain, gene expression, puberty, female rats, nicotine dependence, chronic nicotine exposure, ventral striatum, prefrontal cortex, hippocampus, smoking initiation
MeSH terms
Age Factors, Aging, Animals, Animals, Newborn, Brain, Female, Nicotine, Reproducibility of Results, Cluster Analysis, Gene Expression Regulation, Developmental, Nicotinic Agonists, Reverse Transcriptase Polymerase Chain Reaction, Rats, Long-Evans, Oligonucleotide Array Sequence Analysis, Rats

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