HSV-1 Infected hiNSC Models for Sporadic Alzheimer's Disease Screening
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Solution Overview
Problem
Current in vitro models of Alzheimer's disease (AD) lack representation of sporadic AD and late-onset AD, failing to accurately mimic the complex etiology and progression of the disease, which hinders the development of effective treatments.
Innovation Solution
Development of in vitro models using human induced neural stem cells (hiNSCs) infected with a low multiplicity of herpes simplex virus type 1 (HSV-1), which exhibit AD-like phenotypes, including amyloid plaque formation, reactive gliosis, and neuroinflammation, in both two-dimensional and three-dimensional cultures, allowing for the study of AD pathogenesis and potential therapeutic targets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional in vitro models are used, then the models are simple to maintain, but they fail to accurately represent sporadic AD and late-onset AD pathogenesis
Solution Approach 1:
The patent introduces an intermediary viral vector system that delivers specific gene constructs into neural stem cells. This vector-mediated approach enables controlled expression of AD-related proteins and genetic modifications, allowing accurate representation of sporadic AD pathogenesis without requiring complex genetic engineering procedures. The vector acts as a bridge between simple cell culture and complex disease modeling.
Solution Approach 2:
The patent modifies key parameters of neural stem cells through viral transduction, including overexpression of specific genes (APP, BACE1, PSEN1), introduction of genetic mutations, and modulation of protein expression levels. These parameter changes transform ordinary neural stem cells into disease-specific models that accurately represent sporadic AD while maintaining the simplicity of in vitro cell culture systems.
2Productivity
If high throughput screening is implemented, then the screening capacity increases, but the system complexity and resource requirements increase
Solution Approach 1:
The patent creates a universal in vitro AD model system using neural stem cells that can serve multiple functions: disease pathogenesis studies, drug screening, toxicology testing, and mechanistic research. This multi-functional platform enables high throughput screening without requiring separate complex systems for each application, as the same cell model can be used across different research and development activities.
Solution Approach 2:
The neural stem cell models exhibit self-organizing properties and spontaneous differentiation into functional neuronal networks that naturally display AD-like phenotypes. This self-service capability reduces the need for complex external control systems and manual intervention, enabling automated high throughput screening while maintaining biological relevance and reducing system complexity.
Data Source
AI summary
The present invention provides an in vitro model of Alzheimer's disease (AD) comprising human induced neuronal stem cells (hiNSCs) infected with herpes simplex 1 that develop an Alzheimer's disease phenotype. The invention further provides AD model comprising genetically modified HSV infected hiNSCs. The use of these in vitro AD models for high throughput screening and phenotypic analysis are also provided.