Recent rodent models for Alzheimer's disease: clinical implications and basic research

Area of Science:

• Neuroscience
• Gerontology
• Pathology

Background:

• Alzheimer's disease (AD) is a leading cause of dementia in older adults.
• Key factors in AD development include amyloid precursor protein (APP), tau hyperphosphorylation, and secretase enzymes.
• Animal models are crucial for understanding AD mechanisms and testing therapies.

Purpose of the Study:

• To review the limitations and clinical relevance of current transgenic rodent models for Alzheimer's disease research.
• To highlight the potential of the Octodon degu as a natural model for studying AD neuropathology.

Main Methods:

• Review of existing literature on transgenic and non-transgenic animal models of Alzheimer's disease.
• Analysis of spontaneous neuropathological signs of AD in aged Octodon degu rodents.

Main Results:

• Transgenic rodent models over-expressing human β-amyloid precursor protein (β-APP) and mutant tau aid in studying AD pathogenesis.
• No current transgenic AD models fully recapitulate all pathological features of the disease.
• Octodon degu rodents spontaneously develop AD-like neuropathological signs in old age.

Conclusions:

• Existing transgenic models have limitations in fully replicating Alzheimer's disease.
• Octodon degu presents a promising natural model for Alzheimer's disease research due to spontaneous neuropathology.
• Further investigation into O. degu could provide valuable insights into AD pathogenesis and therapeutic strategies.