Monoamine Sythesis, Storage and Degradation

Type :

Presentation

Pages :

3 pages

Format :

.doc

Published date :

11/13/2007

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Summary :

 
 

Table of Contents Monoamine Sythesis, Storage and Degradation Table of Contents

 
  1. Introduction
  2. Serotonin
  3. Catecholamines
  4. Histamine
  5. Acetylcholine
  6. Plasma membrane transporters
  7. Vesicular monoamine transporter
  8. References

Abstract

In addition to similarities in neuronal organization, monoaminergic systems are similar with regard to their synthesis, storage, and degradation. Monoamines are synthesized within neurons from common amino acid precursors and taken up into synaptic vesicles via a vesicular monoamine transporter. Upon stimulation, vesicles within nerve terminals release neurotransmitter into the synaptic cleft. Once released, the monoamines interact with postsynaptic receptors to alter the excitability of postsynaptic cells. Monoamines may also interact with presynaptic autoreceptors located on the nerve terminal to suppress further release. In addition, released monoamines may be taken back up from the synaptic cleft into the nerve terminal by plasma membrane transporter proteins. Reuptake plays an important role in limiting the magnitude and duration of action of synaptically released monoamines. Once monoamines are taken up, they may be subject to enzymatic degradation or they may be protected from degradation by uptake into vesicles. The processing of acetylcholine differs from this scheme, and is described below.

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About the author :

pencil image Sylas S.  
Level :Advanced Study : Psychology School/University : NYU

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