Single-Cell Transcriptomics Reveals a Pivotal Role of DOCK2 in Sjögren Disease
Yiran Shen1, Alexandria Voigt1, Indraneel Bhattacharyya2
1University of Florida College of Veterinary Medicine, Gainesville.
ACR Open Rheumatology
|October 9, 2024
Summary
Researchers identified dedicator of cytokinesis 2 (DOCK2) as a key factor in Sjögren disease (SjD) pathogenesis. Inhibiting DOCK2 in CD8+ T cells effectively reduced SjD symptoms in a mouse model, suggesting a new therapeutic target.
Area of Science:
- Immunology
- Autoimmune Diseases
- Molecular Biology
Background:
- Sjögren disease (SjD) is an autoimmune disorder affecting exocrine glands.
- Understanding the specific immune cells and pathways driving SjD pathogenesis is crucial for developing targeted therapies.
Purpose of the Study:
- To identify pathogenic immune cell populations and their associated immunologic pathways in Sjögren disease salivary glands.
- To evaluate the therapeutic potential of inhibiting dedicator of cytokinesis 2 (DOCK2) in CD8+ T cells within an SjD mouse model.
Main Methods:
- Single-cell RNA sequencing was utilized to analyze immune cell composition and dynamics in SjD mouse salivary glands.
- Transcriptomic data and clustering analysis identified key molecular targets for therapeutic intervention.
Main Results:
- Diverse immune cells, including B cells, CD4+ and CD8+ T cells, macrophages, and NK cells, were identified.
- Elevated DOCK2 expression was observed in CD8+ T cells within the SjD model.
- Treatment with a DOCK2 inhibitor (CPYPP) significantly ameliorated SjD symptoms in mice.
Conclusions:
- DOCK2 plays a significant role in Sjögren disease pathogenesis.
- Targeting DOCK2 in CD8+ T cells represents a promising therapeutic strategy for SjD.
- This study opens new avenues for immunomodulatory treatments for Sjögren disease.
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