Introduction to Animal Models of Vascular Dementia

Vascular dementia (VaD) animal models are experimental systems designed to mimic cognitive impairment and neurodegenerative changes resulting from cerebral hypoperfusion. These models are commonly established through methods such as permanent or repeated bilateral common carotid artery ligation (2VO/4VO), chronic cerebral ischemia, or embolization. Following model induction, chronic cerebral hypoperfusion ensues, leading to deficits in learning and memory, spatial cognitive impairments, and declines in executive function. Concurrently, these models exhibit hallmark pathological features, including neuronal loss in the hippocampus and cortex, white matter damage, heightened oxidative stress, and neuroinflammatory responses. As such, they are extensively employed in studies of the pathogenic mechanisms underlying vascular cognitive impairment and in the in vivo evaluation of potential therapeutic interventions.

Service Advantages of the Aniphe Biolaboratory Vascular Dementia Animal Model Platform

Aniphe Biolaboratory Vascular Dementia (VaD) animal model platform is centered on establishing stable cerebral hypoperfusion and reliably reproducing cognitive impairment, providing a robust in vivo model system for investigating the mechanisms of vascular cognitive disorders and evaluating potential therapeutic interventions.

	Refine multiple classic modeling approaches. It encompasses mainstream models such as bilateral common carotid artery ligation (2VO/4VO) and white matter injury, catering to diverse research needs.
	Cerebral hypoperfusion is stable and controllable. By standardizing surgical procedures, the degree of cerebral blood flow reduction is precisely controlled, ensuring model consistency.
	Cognitive impairment is stable. It can reliably induce typical phenotypes, including impaired learning and memory, spatial cognitive deficits, and diminished executive function.
	Pathological changes are closely aligned with clinical findings. It can reliably reproduce key pathological features, including hippocampal neuronal damage, white matter degeneration, oxidative stress, and neuroinflammation.
	The model exhibits high reproducibility. Standardized modeling protocols minimize inter-individual variability and enhance the consistency of behavioral and pathological data.
	The multidimensional evaluation system has been refined. Systematic evaluation is achieved through a combination of behavioral testing, cerebral blood flow assessment, and histopathological analysis.

Modeling cycle	8–16 weeks
Laboratory animals	Adult male SD rats, Wistar rats, or C57BL/6 mice
Positive drug	Commonly used drugs such as donepezil (an acetylcholinesterase inhibitor), memantine (an NMDA receptor antagonist), nimodipine (an L-type calcium channel blocker), and oxidative stress inhibitors like edaravone are employed to assess the model’s sensitivity to cognitive improvement.
Application areas	Pathogenic mechanisms of vascular dementia (cerebral hypoperfusion, white matter injury, neuroinflammation, and blood–brain barrier disruption); mechanistic studies of mixed dementia (vascular plus Alzheimer’s disease); screening of drugs that improve cerebral blood flow or promote myelin repair; preclinical evaluation of neuroprotective agents and rehabilitation intervention strategies.

Construction of an Animal Model of Vascular Dementia

In the bilateral common carotid artery permanent ligation (2VO) model, after anesthetizing the animals, the bilateral common carotid arteries are isolated and permanently ligated, thereby maintaining prolonged cerebral hypoperfusion. This leads to neuronal damage in the hippocampus and cortex, disturbances in energy metabolism, and impaired cognitive function. The white matter injury model, by contrast, employs chronic hypoperfusion or localized injury to selectively disrupt white matter architecture, resulting in reduced neural conduction efficiency and deficits in information integration.

Both models consistently recapitulate hallmark phenotypes of vascular dementia, including impairments in learning and memory, spatial cognition, and executive function, accompanied by neuronal loss, white matter degeneration, and neuroinflammatory responses. They thus serve as valuable experimental platforms for investigating the underlying mechanisms of vascular cognitive impairment and for developing therapeutic interventions.