Normal Pressure Hydrocephalus in Adult Mice Causes Gait Impairment, Cognitive Deficits, and Urinary Frequency with...

Area of Science:

• Neurology
• Neuroscience
• Animal Models

Background:

• Normal pressure hydrocephalus (NPH) presents with enlarged ventricles, normal intracranial pressure, and key symptoms like gait disturbance, cognitive decline, and urinary incontinence.
• The underlying neural circuit dysfunction in NPH remains poorly understood.
• An adult mouse model is needed for preclinical research into NPH mechanisms.

Purpose of the Study:

• To establish the first adult mouse model of chronic, communicating hydrocephalus with normal intracranial pressure.
• To characterize the behavioral and physiological symptoms in this novel NPH mouse model.

Main Methods:

• Development of a chronic, communicating hydrocephalus model in adult mice.
• Assessment of gait, locomotion, cognitive function, and urinary behavior in hydrocephalic mice.

Main Results:

• Hydrocephalic mice exhibited unsteady gait and reduced maximum walking velocity.
• Subtle learning impairments were observed despite generally good performance in behavioral tests.
• Hydrocephalic mice developed urinary frequency, with some experiencing incontinence, mirroring human NPH symptoms.

Conclusions:

• This novel mouse model accurately replicates key symptoms of human normal pressure hydrocephalus.
• The model provides a valuable platform for investigating the neural circuits underlying NPH symptoms.
• It facilitates preclinical research for developing new NPH therapeutic strategies.