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Related Concept Videos

Stimulants01:29

Stimulants

156
Stimulants are substances that enhance neural activity and elevate dopamine levels in the brain, leading to their highly addictive nature. These drugs include cocaine, amphetamines, MDMA, caffeine, and nicotine, each with distinct mechanisms of action and varied health implications.
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...
156

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Related Experiment Video

Updated: May 27, 2025

Generation of Electronic Cigarette Aerosol by a Third-Generation Machine-Vaping Device: Application to Toxicological Studies
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Exposure to third hand e-cigarette vapour impairs cognitive function in young mice.

Brian G Oliver1, Jingyu Wang2, Rochelle A Yarak3

  • 1School of Life Sciences, Faculty of Science, University of Technology Sydney, NSW 2007, Australia; Respiratory Cellular and Molecular Biology, Woolcock Institute of Medical Research, Macquarie Univerity, NSW 2113, Australia.

Ecotoxicology and Environmental Safety
|February 15, 2025
PubMed
Summary

Third-hand vaping exposure impairs memory and increases anxiety in young mice, even without nicotine. This highlights indoor vaping risks for children and adolescents.

Keywords:
AnxietyMemoryNeural inflammationNicotineVaping

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Area of Science:

  • Neuroscience
  • Toxicology
  • Environmental Health

Background:

  • Indoor vaping creates third-hand vapour exposure through surface contamination with nicotine and carcinogens.
  • Children are particularly vulnerable to these environmental toxins.

Purpose of the Study:

  • To investigate the impact of third-hand e-cigarette vapour exposure on cognitive functions in young mice.
  • To determine if nicotine is essential for observed cognitive and behavioral effects.

Main Methods:

  • Young male mice were exposed for four weeks to cotton towels treated with e-cigarette vapour (with or without nicotine).
  • Cognitive functions (memory, anxiety) and neurobiological markers (neuron count, microglia activation, cytokine expression) were assessed.

Main Results:

  • Nicotine-free vapour exposure impaired short-term memory.
  • Nicotine-containing vapour exposure increased anxiety-like behaviors.
  • Both exposure types reduced cortical neuron numbers and increased brain inflammation (microglia, pro-inflammatory cytokines).

Conclusions:

  • Third-hand vaping exposure negatively affects cognitive function and behavior, with both nicotine-dependent and independent mechanisms.
  • These findings underscore the health risks of indoor vaping, particularly for vulnerable populations like children.
  • Further research is needed to elucidate the specific pathways involved.