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Related Experiment Video

Updated: May 11, 2026

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PDE2 and PDE10, but not PDE5, inhibition affect basic auditory information processing in rats.

O A H Reneerkens1, A Sambeth, A Blokland

  • 1Department of Psychiatry and Neuropsychology, School for Mental Health and Neurosciences, Maastricht University, The Netherlands; European Graduate School of Neuroscience (EURON), The Netherlands. o.reneerkens@maastrichtuniversity.nl

Behavioural Brain Research
|May 22, 2013
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Summary

Phosphodiesterase inhibitors (PDE-Is) targeting PDE2, PDE10, and PDE5 did not alter sensory gating in rats. However, PDE2 and PDE10 inhibition affected auditory processing, suggesting cognition enhancement may involve earlier processing stages.

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Area of Science:

  • Neuroscience
  • Pharmacology

Background:

  • Phosphodiesterase type 2 (PDE2), type 10 (PDE10), and type 5 (PDE5) inhibitors (PDE-Is) are investigated for cognitive enhancement.
  • While PDE-Is improve memory in animals, their impact on auditory processing remains unclear.

Purpose of the Study:

  • To investigate the effects of specific PDE2, PDE10, and PDE5 inhibitors on sensory gating in a rat model.
  • To determine if PDE inhibition influences auditory information processing.

Main Methods:

  • Rats received oral administration of vehicle, BAY 60-7550 (PDE2 inhibitor), vardenafil (PDE5 inhibitor), or PQ-10 (PDE10 inhibitor).
  • Electroencephalogram (EEG) recordings were obtained from the hippocampus, striatum, and vertex.
  • Sensory gating was assessed by comparing neural responses to paired auditory stimuli (S1 and S2).

Main Results:

  • Sensory gating, characterized by reduced N1 amplitudes to S2 compared to S1, was observed in the vertex and hippocampus.
  • None of the tested PDE inhibitors significantly affected sensory gating.
  • PDE2 inhibition increased the P1 peak amplitude after S1 presentation at the vertex.
  • PQ-10 (PDE10 inhibitor) increased the N1 peak amplitude in the hippocampus.

Conclusions:

  • PDE2 and PDE10 inhibition impact general auditory information processing, while PDE5 inhibition does not.
  • Cognition-enhancing effects of PDE5 inhibitors may relate to higher cognitive functions.
  • Cognition-enhancing effects of PDE2 and PDE10 inhibitors might involve modulation of earlier auditory processing stages.