Sulforaphane improved cognitive behavior in APP/PS1 mice via promoting structural and functional synaptic plasticity...

Area of Science:

• Neuroscience
• Pharmacology

Background:

• Alzheimer's disease (AD) is characterized by cognitive dysfunction, with oxidative stress playing a key role in its pathogenesis.
• Sulforaphane (SFN), a compound from cruciferous vegetables, has known antioxidant and neuroprotective properties, but its effects on AD-related synaptic plasticity are not well understood.

Purpose of the Study:

• To investigate the impact of SFN on cognitive function, synaptic plasticity, and underlying mechanisms in a mouse model of Alzheimer's disease.
• To determine if SFN can ameliorate AD-induced deficits by restoring hippocampal synaptic function and integrity.

Main Methods:

• Utilized APPswe/PS1dE9 double transgenic mice and wild-type littermates, administering SFN via intraperitoneal injection.
• Assessed cognitive performance using spatial learning and memory tests.
• Conducted electrophysiological recordings to evaluate hippocampal long-term potentiation (LTP) and employed immunoblotting and Golgi staining to analyze synaptic protein expression and dendritic morphology.

Main Results:

• SFN administration significantly improved spatial learning and memory deficits in APP/PS1 mice.
• SFN treatment attenuated oxidative damage and alleviated impaired hippocampal LTP in AD mice.
• SFN increased the expression of synaptic proteins PSD-95 and synaptophysin and enhanced dendritic complexity and spine density.

Conclusions:

• SFN ameliorates cognitive deficits in Alzheimer's disease models by restoring hippocampal synaptic plasticity and structural integrity.
• The neuroprotective effects of SFN in AD are linked to its ability to alleviate LTP inhibition and reduce oxidative stress.
• SFN demonstrates potential as a therapeutic agent for Alzheimer's disease, targeting synaptic dysfunction.