Theme 5 Human cell biology and pathology.

Area of Science:

• Neuroscience
• Immunology
• Biomarker Discovery

Background:

• Amyotrophic Lateral Sclerosis (ALS) diagnosis is often delayed due to elusive early symptoms and lack of specific biomarkers.
• This diagnostic delay limits the therapeutic window for neuroprotective strategies.
• Current biomarkers are insufficient for monitoring disease progression and patient stratification in clinical trials.

Purpose of the Study:

• To develop and validate an early diagnostic tool for ALS using microscopic immune cell analysis.
• To monitor immune cell profiles in blood samples from ALS patients via the Toponome Imaging System (TIS).

Main Methods:

• Utilized the Toponome Imaging System (TIS) for automated microscopic analysis of peripheral blood mononuclear cells (PBMCs).
• Collected combinatorial molecular data on spatial protein networks (toponome) from PBMCs of ALS patients and healthy controls.
• Quantitatively analyzed PBMC toponome architectures as binary codes representing protein presence or absence.

Main Results:

• Identified a distinct subpopulation of lymphocytes with a specific surface protein pattern, termed 'ALS toponome', in ALS patients.
• These aberrant T cells were absent in healthy controls.
• The count of these 'ALS toponome' cells correlated with ALS progression rate, suggesting a potential causal role.

Conclusions:

• The 'ALS toponome' presents a potential strategy for early ALS detection and disease progression monitoring.
• Further statistical analysis with larger patient cohorts and differentiation from other neurodegenerative diseases are necessary.
• Ongoing clinical trials aim to validate these findings for disease staging and improved therapeutic options.