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Related Concept Videos

Drug Dependence01:17

Drug Dependence

Medications are typically administered to achieve therapeutic effects. Some drugs can modify an individual's mood and perception, frequently resulting in various enjoyable experiences. However, this can result in drug dependency, a condition marked by continuous drug use despite potential negative consequences. Drug dependency primarily falls into two categories: psychological and physical dependence. Psychological dependence occurs when the pleasurable feelings induced by the drug...
Cholinergic Receptors: Nicotinic01:15

Cholinergic Receptors: Nicotinic

Nicotinic receptors are ligand-gated ion channels that are activated by acetylcholine and nicotine. Upon activation, they cause a rapid increase in the permeability of cells to K+, Na+, and Ca2+, followed by depolarization and excitation. They are in the autonomic ganglia, skeletal neuromuscular junction, CNS, and adrenal medulla.
There are two types of nicotinic receptors: neuromuscular (NM/NM/N1) and neuronal (NN/NN/N2). The two families differ based on their location and selectivity to...
Drugs Acting on Autonomic Ganglia: Stimulants01:23

Drugs Acting on Autonomic Ganglia: Stimulants


Ganglionic stimulants activate NM nicotinic receptors in autonomic ganglia, falling into two categories: nicotine mimetics [e.g., lobeline, dimethylpiperazine, tetramethylammonium] and muscarinic receptor agonists [e.g., muscarine, methacholine]. The first category's action is rapid and blocked by nicotinic receptor antagonists, while the second category's action is delayed and blocked by atropine-like agents. Nicotine, an alkaloid, affects the heart rate by stimulating sympathetic or...
CNS Depressants: Alcohol and Nicotine01:27

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Ethanol, a clear colorless alcohol, has been consumed by humans for millennia, but its effects on the body are far from benign. At lower doses, it induces decreased inhibitions and loquaciousness, leading to its social appeal. However, it can cause severe consequences at higher doses, such as coma and respiratory depression, due to its zero-order elimination kinetics. Chronic ethanol abuse wreaks havoc on multiple organ systems, particularly the CNS and the liver. Abrupt cessation of ethanol...

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Related Experiment Video

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Spectral Confocal Imaging of Fluorescently tagged Nicotinic Receptors in Knock-in Mice with Chronic Nicotine Administration
08:47

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Published on: February 10, 2012

Nicotine self-administration.

K A Perkins1

  • 1Department of Psychiatry, University of Pittsburgh Medical Center, PA 15213, USA. kperkins@vms.cis.pitt.edu

Nicotine & Tobacco Research : Official Journal of the Society for Research on Nicotine and Tobacco
|January 5, 2002
PubMed
Summary
This summary is machine-generated.

Understanding nicotine dependence and smoking cessation requires research focused on nicotine self-administration. Environmental cues and individual differences significantly impact nicotine intake and relapse, necessitating broader research considerations.

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Area of Science:

  • Behavioral neuroscience
  • Pharmacology
  • Addiction research

Background:

  • Nicotine self-administration is a key factor in understanding nicotine dependence and developing smoking cessation treatments.
  • Nicotine, independent of tobacco smoke, is self-administered by both humans and animals.
  • Pharmacological factors like dose and speed of administration influence nicotine intake.

Purpose of the Study:

  • To emphasize the critical link between research findings and nicotine self-administration for relevance to nicotine dependence and smoking cessation.
  • To highlight the significant role of environmental cues and social factors in nicotine self-administration and relapse.
  • To advocate for the identification of specific nicotine effects and minimum effective doses, considering individual differences.

Main Methods:

  • Review of existing research on nicotine self-administration.
  • Analysis of pharmacological and environmental influences on nicotine intake.
  • Examination of individual differences in response to nicotine.

Main Results:

  • Nicotine self-administration is influenced by both pharmacological factors and environmental cues.
  • Environmental factors, including social facilitation, play a crucial role in smoking relapse.
  • Individual differences, such as sex, affect nicotine's impact.

Conclusions:

  • Research on smoking and nicotine must directly address self-administration to be relevant for understanding dependence and cessation.
  • Environmental factors are critical, potentially being the primary cause of delayed smoking relapse.
  • Translating laboratory findings to real-world settings is essential for effective smoking cessation treatments.