A Long-Living Bioengineered Neural Tissue Platform to Study Neurodegeneration

Area of Science:

• Neuroscience
• Biotechnology
• Stem Cell Biology

Background:

• Rising prevalence of dementia and neurodegenerative diseases necessitates advanced research models.
• Existing long-term tissue culture systems are needed to study chronic brain conditions.

Purpose of the Study:

• To evaluate the long-term stability and functionality of a 3D bioengineered neural tissue model.
• To assess the utility of this model for studying Alzheimer's disease and other neurodegenerative conditions.

Main Methods:

• Human induced pluripotent stem cells (hiPSCs) from healthy and Alzheimer's disease donors were used.
• Neurons and glial cells were cultured on silk-based scaffolds for over two years.
• Cell retention, stress markers, electrical activity, and pathological markers (amyloid-beta, tau) were analyzed.

Main Results:

• The 3D neural tissue model remained stable and functional for over two years.
• Diseased samples showed reduced spontaneous electrical activity.
• Increased oxidative stress and Alzheimer's-like pathological markers were observed in some diseased samples.

Conclusions:

• The developed 3D bioengineered neural tissue model demonstrates long-term stability and functionality.
• This platform is well-suited for investigating chronic brain diseases, including neurodegeneration and Alzheimer's disease.
• The model effectively recapitulates key aspects of Alzheimer's pathology in vitro.