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GZMK+CD8+ T cells Target A Specific Acinar Cell Type in Sjögren's Disease
Thomas J F Pranzatelli1,2, Paola Perez3, Anson Ku4
1Adeno-Associated Virus Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA.
Research Square
|January 10, 2024
Summary
Sjögren
Area of Science:
- Immunology
- Cell Biology
- Genomics
Background:
- Sjögren's Disease (SjD) is a systemic autoimmune condition with unknown causes and limited treatment options.
- Understanding the cellular changes in salivary glands is crucial for SjD pathogenesis.
- Current knowledge of salivary gland cellular dynamics in SjD is incomplete.
Purpose of the Study:
- To comprehensively analyze the cellular landscape of human minor salivary glands in health and Sjögren's Disease.
- To identify specific cell types and interactions involved in SjD pathology.
- To elucidate the mechanisms underlying acinar cell loss in SjD.
Main Methods:
- Unbiased single-cell and spatial transcriptomics were employed on human minor salivary gland tissues.
- Comparative analysis of cellular composition and spatial organization between healthy and SjD samples.
- Identification and characterization of distinct cell populations and their molecular markers.
Main Results:
- Novel seromucous acinar cell subtypes were discovered.
- A specific population of PRR4+CST3+WFDC2- seromucous acinar cells was identified as a key target in SjD.
- Enrichment of cytotoxic GZMK+CD8 T cells was observed in SjD, associated with immune-engaged epithelial cells.
- Insights into the immune response's effect on secretory acinar cells and their subsequent loss in SjD.
Conclusions:
- The study reveals a detailed cellular atlas of salivary glands in health and SjD.
- Specific acinar cell populations and cytotoxic CD8 T cells are implicated in SjD pathogenesis.
- Findings provide a foundation for understanding SjD mechanisms and developing targeted therapies.
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