PDE4A knockdown rescues alcohol-induced cognitive impairment and synaptic dysfunction via the cAMP/PKA/CREB pathway

Topic: Brain proteins, microglia and lab models

This study demonstrated that selectively targeting PDE4A rescued cognitive and neuropathological deficits in a validated mouse model of AlD. Behavioral tests showed that PDE4A knockdown significantly improved spatial memory and cognition in the Morris water maze, novel object recognition, and the Y maze in the AlD mice. Pathological analysis revealed that PDE4A knockdown reduced amyloid-beta (Aβ) deposition and phosphorylated Tau levels. Furthermore, it restored synaptic integrity, as evidenced by the upregulation of PSD95 and Synaptophysin, enhanced dendritic complexity, and increased spine density, while also exerting neuroprotective effects by suppressing neuronal apoptosis in AlD mice. Mechanistically, the therapeutic benefits of PDE4A knockdown were mediated through the reactivation of the critically impaired cAMP/PKA/CREB signaling pathway, leading to elevated cAMP levels, increased PKA activity, and enhanced phosphorylation of CREB. Our findings established PDE4A as one of the key AlD pathological drivers and identified its selective inhibition as a novel and promising therapeutic strategy for AlD, offering a viable approach to circumvent the adverse effects associated with broad-spectrum PDE4 inhibition.

@article{tu2026-42434904,
  author  = {Tu, Huan and Sun, Rongzhen and Ma, Shengyao and Li, Chunxu and Lv, Mingti and Han, M H and Zhang, Han‐Ting},
  title   = {{PDE4A knockdown rescues alcohol-induced cognitive impairment and synaptic dysfunction via the cAMP/PKA/CREB pathway}},
  journal = {The International Journal of Neuropsychopharmacology},
  year    = {2026},
  doi     = {10.1093/ijnp/pyag031},
  pmid    = {42434904},
  url     = {https://doi.org/10.1093/ijnp/pyag031}
}

Key findings

• This study demonstrated that selectively targeting PDE4A rescued cognitive and neuropathological deficits in a validated mouse model of AlD.
• Behavioral tests showed that PDE4A knockdown significantly improved spatial memory and cognition in the Morris water maze, novel object recognition, and the Y maze in the AlD mice.
• Pathological analysis revealed that PDE4A knockdown reduced amyloid-beta (Aβ) deposition and phosphorylated Tau levels.
• Furthermore, it restored synaptic integrity, as evidenced by the upregulation of PSD95 and Synaptophysin, enhanced dendritic complexity, and increased spine density, while also exerting neuroprotective effects by suppressing neuronal apoptosis in AlD mice.
• Mechanistically, the therapeutic benefits of PDE4A knockdown were mediated through the reactivation of the critically impaired cAMP/PKA/CREB signaling pathway, leading to elevated cAMP levels, increased PKA activity, and enhanced phosphorylation of CREB.

Why it matters

In a mouse model of alcohol-induced cognitive impairment, knocking down PDE4A improved memory and reduced amyloid-beta deposition, phosphorylated tau and synaptic damage via the cAMP/PKA/CREB pathway. These are animal findings for alcohol-induced impairment, not evidence of treating, curing or preventing Alzheimer's disease in people.

Study details

• Evidence strengthLow

Read the original

• DOI: 10.1093/ijnp/pyag031
• PubMed: 42434904
• Original source →
• Free full text: The International Journal of Neuropsychopharmacology →

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