Abstract
The objective of this study was to assess the effects of phosphodiesterase type 2 (PDE2) and type 10 (PDE10) inhibition on memory function in the object recognition task using the scopolamine- and MK-801-induced memory deficit model. The effects of the PDE2 inhibitor BAY 60-7550 and the PDE10 inhibitor PQ-10 on object recognition performance were investigated in the scopolamine (0.1 mg/kg, i.p.) or MK-801 (0.125 mg/kg, i.p.) model. BAY 60-7550 was tested at a dose of 0.3-3 mg/kg (p.o.) in both models; PQ-10 was tested at doses of 0.1-1 mg/kg (p.o.) in the scopolamine model and 0.3-3 mg/kg in the MK-801 model. All compounds were injected 30 min before the learning trial. Both BAY 60-7550 (1 mg/kg) and PQ-10 (0.3 mg/kg) attenuated the scopolamine-induced memory deficit. The MK-801-induced memory deficit was reversed after treatment with each PDE inhibitor at a dose of 1 mg/kg or higher. PQ10 was highly brain penetrant, whereas 60-7550 levels in the brain were very low after oral treatment. We concluded that since BAY 60-7550 and PQ10 reversed both scopolamine- and MK-801-induced memory deficits, this supports the notion that dual substrate PDE inhibitors might be suitable candidates for cognition enhancement. (c) 2012 Elsevier B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 16-22 |
Number of pages | 7 |
Journal | Behavioural Brain Research |
Volume | 236 |
DOIs | |
Publication status | Published - 1 Jan 2013 |
Keywords
- Phosphodiesterase
- cGMP
- cAMP
- BAY 60-7550
- PQ-10
- Object recognition
- Memory
- ACUTE TRYPTOPHAN DEPLETION
- LONG-TERM POTENTIATION
- RECOGNITION MEMORY
- CYCLIC-GMP
- PHOSPHODIESTERASE 10A
- IMMUNOHISTOCHEMICAL LOCALIZATION
- INDUCED IMPAIRMENTS
- PERIRHINAL CORTEX
- RAT HIPPOCAMPUS
- CGMP