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Screening of Alzheimer's Disease With Multiwavelength Stokes Polarimetry in a Mouse Model
Abstract:
The minimum histological criterion for the diagnostics of Alzheimer's disease (AD) in tissue is the presence of senile plaques and neurofibrillary tangles in specific brain locations. The routine procedure of morphological analysis implies time-consuming and laborious steps including sectioning and staining of formalin-fixed paraffin-embedded (FFPE) tissue. We developed a multispectral Stokes polarimetric imaging approach that allows characterization of FFPE brain tissue samples to discern the stages of AD progression without sectioning and staining the tissue. The Stokes polarimetry approach is highly sensitive to structural alterations of brain tissue, particularly to the changes in light scattering and birefringence. We present the results of the label-free non-destructive screening of FFPE mouse brain tissue and show several polarization metrics that demonstrate statistically significant differences for tissues at different stages of AD.
Insights
This study introduces a novel polarimetric imaging technique to detect Alzheimer's disease (AD) in brain tissue. This non-destructive method bypasses traditional sectioning and staining, offering a faster diagnostic approach for AD progression.
Area of Science:
- Neuroscience
- Biomedical Imaging
- Pathology
Background:
- Alzheimer's disease (AD) diagnosis relies on identifying senile plaques and neurofibrillary tangles in brain tissue.
- Current histological analysis of formalin-fixed paraffin-embedded (FFPE) tissue is time-consuming and labor-intensive, involving sectioning and staining.
Purpose of the Study:
- To develop a label-free, non-destructive imaging method for characterizing FFPE brain tissue.
- To discern stages of Alzheimer's disease progression using a novel approach.
Main Methods:
- Development of a multispectral Stokes polarimetric imaging approach.
- Characterization of FFPE mouse brain tissue without sectioning or staining.
- Analysis of light scattering and birefringence properties of brain tissue.
Main Results:
- The Stokes polarimetry approach is sensitive to structural alterations in brain tissue.
- Statistically significant differences in polarization metrics were observed for tissues at different stages of AD.
- Demonstrated label-free, non-destructive screening of FFPE mouse brain tissue.
Conclusions:
- Multispectral Stokes polarimetric imaging offers a promising alternative to traditional histological methods for AD diagnostics.
- This technique can potentially accelerate the assessment of Alzheimer's disease progression.
- Polarization metrics derived from this method show potential for quantitative analysis of AD-related tissue changes.
