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Role of Neurotransmitters in Memory01:23

Role of Neurotransmitters in Memory

Neurotransmitters are integral to the brain's communication system, enabling neurons to transmit signals across synapses. This chemical exchange underpins various cognitive functions, including memory processes. The role of neurotransmitters in memory is multifaceted, influencing the encoding, consolidation, and retrieval of memories through their action on different neural circuits.
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CNS Stimulants: Cocaine, Amphetamines and Cannabinoids

CNS stimulants, such as cocaine, amphetamines, and cannabinoids, have varying structures and mechanisms of action that lead to different therapeutic effects and side effects. Cocaine, with its molecular formula C17H21NO4, is a tropane alkaloid and a tertiary amino compound. It has two chemical forms: the hydrochloride salt and the "freebase." The former is in powder form, while the latter involves removing the hydrochloride salt to create a form that can be smoked. Cocaine exerts its effects by...
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Phase II Reactions: Methylation Reactions

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Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists

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A General Method for Evaluating Deep Brain Stimulation Effects on Intravenous Methamphetamine Self-Administration
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Published on: January 22, 2016

[Molecular mechanism for methamphetamine-induced memory impairment].

Taku Nagai1, Kiyofumi Yamada

  • 1Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8560, Japan.

Nihon Arukoru Yakubutsu Igakkai Zasshi = Japanese Journal of Alcohol Studies & Drug Dependence
|May 22, 2010
PubMed
Summary

Chronic methamphetamine abuse in rodents impairs recognition and spatial working memory, linked to dopamine D1 receptor-extracellular signal-regulated kinase 1/2 (ERK1/2) pathway dysfunction. Certain drugs may reverse these cognitive deficits.

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Area of Science:

  • Neuroscience
  • Psychopharmacology

Context:

  • Methamphetamine addiction is a global epidemic.
  • Chronic use leads to cognitive deficits and psychosis resembling schizophrenia.
  • Dopamine transporter loss in the striatum correlates with impairment.

Purpose:

  • To review the effects of repeated methamphetamine administration on cognitive function in rodent models.
  • To explore the underlying neurobiological mechanisms, particularly the ERK1/2 pathway.

Summary:

  • Repeated methamphetamine treatment in mice impairs recognition memory post-withdrawal, associated with prefrontal cortex dopamine D1 receptor-ERK1/2 pathway dysfunction.
  • This impairment is reversed by baclofen, clozapine, minocycline, and ZSET1446.
  • In rats, methamphetamine impairs spatial working memory, linked to hippocampal ERK1/2 pathway dysfunction, which clozapine administration can improve.

Impact:

  • Findings highlight the critical role of the ERK1/2 pathway in methamphetamine-induced cognitive deficits.
  • Rodent models may help predict antipsychotic efficacy for methamphetamine psychosis and schizophrenia.