Prenatal alcohol exposure increases postnatal acceptability of nicotine odor and taste in adolescent rats

Nicole M. Mantella, Steven Youngentob

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Human studies indicate that alcohol exposure during gestation not only increases the chance for later alcohol abuse, but also nicotine dependence. The flavor attributes of both alcohol and nicotine can be important determinants of their initial acceptance and they both share the component chemosensory qualities of an aversive odor, bitter taste and oral irritation. There is a growing body of evidence demonstrating epigenetic chemosensory mechanisms through which fetal alcohol exposure increases adolescent alcohol acceptance, in part, by decreasing the aversion to alcohol's bitter and oral irritation qualities, as well as its odor. Given that alcohol and nicotine have noteworthy chemosensory qualities in common, we investigated whether fetal exposure to alcohol increased the acceptability of nicotine's odor and taste in adolescent rats. Study rats were alcohol-exposed during fetal development via the dams' liquid diet. Control animals received ad lib access to an iso-caloric, iso-nutritive diet throughout gestation. Odorant-induced innate behavioral responses to nicotine odor (Experiment 1) or orosensory-mediated responses to nicotine solutions (Experiment 2) were obtained, using whole-body plethysmography and brief access lick tests, respectively. Compared to controls, rats exposed to fetal alcohol showed an enhanced nicotine odor response that was paralleled by increased oral acceptability of nicotine. Given the common aversive component qualities imbued in the flavor profiles of both drugs, our findings demonstrate that like postnatal alcohol avidity, fetal alcohol exposure also influences nicotine acceptance, at a minimum, by decreasing the aversion of both its smell and taste. Moreover, they highlight potential chemosensory-based mechanism(s) by which fetal alcohol exposure increases the later initial risk for nicotine use, thereby contributing to the co-morbid expression with enhanced alcohol avidity. Where common chemosensory mechanisms are at play, our results suggest broader implications related to the consequence of fetal exposure with one substance of abuse and initial acceptability of others.

Original languageEnglish (US)
Article numbere102255
JournalPloS one
Volume9
Issue number7
DOIs
StatePublished - Jul 16 2014

Fingerprint

nicotine
Odors
Nicotine
Rats
alcohols
odors
Alcohols
rats
mouth
Flavors
Nutrition
Odorants
flavor
Whole Body Plethysmography
pregnancy
substance abuse
Plethysmography
Diet
Rat control
liquid diet

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Cite this

Prenatal alcohol exposure increases postnatal acceptability of nicotine odor and taste in adolescent rats. / Mantella, Nicole M.; Youngentob, Steven.

In: PloS one, Vol. 9, No. 7, e102255, 16.07.2014.

Research output: Contribution to journalArticle

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