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Related Concept Videos

Drugs Affecting Neurotransmitter Synthesis01:29

Drugs Affecting Neurotransmitter Synthesis

Drugs affecting neurotransmitter synthesis can impact the adrenergic neuron and the synthesis of neurotransmitters. For example, α-methyltyrosine and carbidopa target specific enzymes involved in catecholamine synthesis. α-methyltyrosine inhibits the enzyme tyrosine hydroxylase, which converts tyrosine into dopamine. By blocking this enzyme, α-methyltyrosine reduces dopamine production and other catecholamines. Carbidopa, on the other hand, inhibits the enzyme dopa decarboxylase, which converts...
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Antidepressant Drugs: MAOIs and Other Agents

Atypical antidepressants, including bupropion (Wellbutrin), mirtazapine (Remeron), nefazodone (Serzone), trazodone (Desyrel), and vilazodone (Viibryd), offer unique mechanisms of action. Bupropion weakly inhibits dopamine and norepinephrine reuptake, aiding depression treatment and smoking cessation, with a low risk of sexual dysfunction. Mirtazapine enhances serotonin and norepinephrine neurotransmission, leading to sedation, increased appetite, and weight gain. As a result, it helps treat...
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Adrenergic Agonists: Indirect-Acting Agents

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Oxidative reactions are pivotal in metabolizing numerous compounds, including pharmaceutical drugs. These reactions often occur in carbon-heteroatom systems, such as carbon-nitrogen, carbon-sulfur, and carbon-oxygen.
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A phase I reaction is a biochemical process that introduces a functionally reactive polar group to a substance. This transformation predominantly occurs in the liver, facilitated by the cytochrome P450 system of hemoproteins situated in the lipophilic endoplasmic reticulum of cells. The metabolite generated through this process can have varying polarities. If it is sufficiently polar, it can be easily excreted in the urine due to its water compatibility. However, if the metabolite is nonpolar,...
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Drugs Affecting Neurotransmitter Release or Uptake

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A Plate-Based Assay for the Measurement of Endogenous Monoamine Release in Acute Brain Slices
07:56

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Published on: August 11, 2021

Monoamine oxidases in development.

Chi Chiu Wang1, Ellen Billett, Astrid Borchert

  • 1Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong.

Cellular and Molecular Life Sciences : CMLS
|July 12, 2012
PubMed
Summary

Monoamine oxidases (MAO) are crucial for brain development. This review highlights new findings on MAO-A and MAO-B roles during embryogenesis and their impact on developmental abnormalities.

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Area of Science:

  • Biochemistry
  • Developmental Biology
  • Neuroscience

Background:

  • Monoamine oxidases (MAOs) are mitochondrial enzymes catalyzing amine metabolism.
  • Two mammalian isoforms, MAO-A and MAO-B, differ in substrate specificity and inhibitor sensitivity.
  • MAO functions in the mature brain are linked to neurological and psychiatric disorders.

Purpose of the Study:

  • To review and evaluate recent findings on the developmental roles of MAO isoforms during embryogenesis.
  • To understand the impact of MAO expression on embryonic development, particularly brain development.
  • To connect MAO activity during development to potential abnormalities.

Main Methods:

  • Literature review and critical evaluation of existing research.
  • Synthesis of data on MAO isoform expression patterns in embryonic tissues.
  • Analysis of studies linking MAO defects to developmental outcomes.

Main Results:

  • MAO isoforms are expressed during mammalian embryogenesis, not just in adults.
  • Defective MAO expression is associated with developmental abnormalities, especially in the brain.
  • MAO activity is critical for normal embryonic development.

Conclusions:

  • MAO isoforms play essential roles during embryonic development.
  • Understanding developmental MAO functions is key to addressing related abnormalities.
  • Further research into MAO's embryogenesis roles is warranted.