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Related Concept Videos

CNS Depressants: Alcohol and Nicotine01:27

CNS Depressants: Alcohol and Nicotine

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...
Stimulants01:29

Stimulants

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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...
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Chronic Obstructive Pulmonary Disease-V: Management

Managing Chronic Obstructive Pulmonary Disease (COPD) involves a multifaceted approach to reduce symptoms, prevent exacerbations, improve overall health status, and slow disease progression. Key strategies include lifestyle modifications, pharmacotherapy, supportive therapies, and, in some cases, surgery. Here is an overview of the primary COPD management strategies:
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Targets for Drug Action: Overview01:26

Targets for Drug Action: Overview

Drugs target macromolecules to modify ongoing cellular processes. Primary drug targets include receptors, ion channels, transporters, and enzymes.
Receptors are either membrane-spanning or intracellular proteins, which upon binding a ligand, get activated and transmit the signal downstream to elicit a response. Drugs bind receptors, either mimicking the action of endogenous ligands or blocking the receptor activity to bring about a modified response. Nearly 35% of approved drugs target the G...
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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...

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Related Experiment Video

Updated: Jun 10, 2026

Creating Dynamic Images of Short-lived Dopamine Fluctuations with lp-ntPET: Dopamine Movies of Cigarette Smoking
14:21

Creating Dynamic Images of Short-lived Dopamine Fluctuations with lp-ntPET: Dopamine Movies of Cigarette Smoking

Published on: August 6, 2013

Double target concept for smoking cessation.

Jie Wu1

  • 1Shantou University Medical College, China. jie.wu@chw.edu

Acta Pharmacologica Sinica
|August 17, 2010
PubMed
Summary
This summary is machine-generated.

Nicotine addiction stems from its action on nicotinic acetylcholine receptors (nAChRs) in the brain. Targeting both nAChRs and dopamine release may offer effective smoking cessation strategies.

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Methods to Evaluate Cytotoxicity and Immunosuppression of Combustible Tobacco Product Preparations
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Published on: January 10, 2015

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Last Updated: Jun 10, 2026

Creating Dynamic Images of Short-lived Dopamine Fluctuations with lp-ntPET: Dopamine Movies of Cigarette Smoking
14:21

Creating Dynamic Images of Short-lived Dopamine Fluctuations with lp-ntPET: Dopamine Movies of Cigarette Smoking

Published on: August 6, 2013

Methods to Evaluate Cytotoxicity and Immunosuppression of Combustible Tobacco Product Preparations
09:25

Methods to Evaluate Cytotoxicity and Immunosuppression of Combustible Tobacco Product Preparations

Published on: January 10, 2015

Area of Science:

  • Neuroscience
  • Pharmacology
  • Addiction Medicine

Background:

  • Tobacco use is a leading cause of preventable death globally.
  • Nicotine is the primary addictive component in tobacco, acting on nicotinic acetylcholine receptors (nAChRs) in the central nervous system.
  • Nicotine's action on nAChRs in brain reward circuits leads to dopamine release, causing reward, tolerance, and dependence.

Purpose of the Study:

  • To summarize recent advancements in understanding the molecular and cellular mechanisms of nicotine reward, tolerance, and dependence.
  • To propose a "double target hypothesis" for smoking cessation based on current scientific understanding.
  • To discuss the implications of this hypothesis for interpreting existing therapies and developing new smoking cessation compounds.

Main Methods:

  • Review of recent scientific literature on nicotine addiction mechanisms.
  • Analysis of the roles of nicotinic acetylcholine receptors (nAChRs) and dopamine (DA) pathways in nicotine dependence.
  • Conceptual framework development for a dual-action therapeutic approach.

Main Results:

  • Nicotine dependence involves nAChR dysfunction (antagonism or desensitization).
  • Nicotine withdrawal symptoms are linked to the regulation of extracellular dopamine levels.
  • A dual-target strategy, addressing both nAChRs and dopamine release, is proposed for effective smoking cessation.

Conclusions:

  • Simultaneous targeting of nAChRs and dopamine release mechanisms holds promise for smoking cessation.
  • This dual-target approach may lead to the development of novel and more effective smoking cessation medications.
  • Understanding the neurobiological underpinnings of nicotine addiction is crucial for therapeutic advancements.