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(S)-3,5-DHPG: a review.

Konstanty Wiśniewski1, Halina Car

  • 1Department of Pharmacology, Medical Academy, 15-222 Bialystok, Mickiewicza 2c, Poland. farmakologia@poczta.onet.pl.

CNS Drug Reviews
|June 19, 2002
PubMed
Summary
This summary is machine-generated.

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(S)-3,5-dihydroxyphenylglycine (3,5-DHPG) is a selective group I metabotropic glutamate receptor agonist. This compound influences neuronal signaling, calcium channels, and neurotransmitter release, showing therapeutic potential for cognitive disorders and neuronal injury.

Area of Science:

  • Neuroscience
  • Pharmacology

Background:

  • 3,5-dihydroxyphenylglycine (3,5-DHPG) is a selective agonist for group I metabotropic glutamate receptors (mGluRs).
  • The S-isomer, (S)-3,5-DHPG, exhibits specific agonist effects on mGluR1a and mGluR5a in neurons and astrocytes.
  • (S)-3,5-DHPG can also interact with NMDA receptors under certain conditions.

Purpose of the Study:

  • To investigate the diverse effects of (S)-3,5-DHPG on second messenger systems in adult and neonatal tissues.
  • To explore the role of (S)-3,5-DHPG as an antagonist or agonist in phospholipase D (PLD) signaling.
  • To examine the influence of (S)-3,5-DHPG on intracellular calcium levels and ion channel regulation.

Main Methods:

  • Dose-dependent stimulation of phosphoinositide hydrolysis in hippocampal tissues.

Related Experiment Videos

  • Measurement of cAMP levels in adult and neonatal tissues.
  • Assessment of (S)-3,5-DHPG's effects on phospholipase D (PLD) activity in brain and astrocyte cultures.
  • Monitoring of intracellular calcium ([Ca2+]i) elevation and regulation of calcium channel subtypes.

    • Main Results:

    • Differential effects of (S)-3,5-DHPG on cAMP levels in adult (inhibition) and neonatal (enhancement) tissues.
    • (S)-3,5-DHPG acts as a PLD antagonist in adults and an agonist in neonates.
    • Elevation of [Ca2+]i and modulation of various Ca2+ channels by (S)-3,5-DHPG.
    • Modulation of neurotransmitter release, excitatory postsynaptic potentials (EPSPs), and induction of LTD and LTP depending on dosage.

    Conclusions:

    • (S)-3,5-DHPG exhibits complex, age-dependent effects on neuronal signaling pathways.
    • Its ability to modulate neurotransmission and synaptic plasticity suggests therapeutic applications.
    • (S)-3,5-DHPG shows promise for treating neuronal injury, cognitive impairments (e.g., ischemia, hypoxia, Alzheimer's disease), and regulating physiological functions.