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Inhibition of PDE2 and PDE4 synergistically improves memory consolidation processes.

Abstract：

:Phosphodiesterases (PDE) are the only enzymes that degrade cAMP and cGMP which are second messengers crucial to memory consolidation. Different PDE inhibitors have been developed and tested for their memory-enhancing potential, but the occurrence of side effects has hampered clinical progression. As separate inhibition of the PDE2 and PDE4 enzyme family has been shown to enhance memory, we investigated whether concurrent treatment with a PDE2 and PDE4 inhibitor can have synergistic effects on memory consolidation processes. We found that combined administration of PF-999 (PDE2 inhibitor) and roflumilast (PDE4 inhibitor) increases the phosphorylation of the AMPA receptor subunit GluR1 and induces CRE-mediated gene expression. Moreover, when combined sub-effective and effective doses of PF-999 and roflumilast were administered after learning, time-dependent forgetting was abolished in an object location memory task. Pharmacokinetic assessment indicated that combined treatment does not alter exposure of the individual compounds. Taken together, these findings suggest that combined PDE2 and PDE4 inhibition has synergistic effects on memory consolidation processes at sub-effective doses, which could therefore provide a therapeutic strategy with an improved safety profile.

journal_name

Neuropharmacology

journal_title

Neuropharmacology

authors

Paes D,Xie K,Wheeler DG,Zook D,Prickaerts J,Peters M

doi

10.1016/j.neuropharm.2020.108414

subject

Has Abstract

pub_date

2021-02-15 00:00:00

pages

108414

eissn

0028-3908

issn

1873-7064

pii

S0028-3908(20)30482-2

journal_volume

184

pub_type

杂志文章

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