Exploring T Cell and NK Cell Involvement in Ankylosing Spondylitis Through Single-Cell Sequencing.

Area of Science:

• Immunology
• Genomics
• Molecular Biology

Background:

• Ankylosing spondylitis (AS) is a chronic inflammatory disease primarily affecting the spine.
• The complex immune mechanisms underlying AS pathogenesis require further elucidation to identify novel therapeutic targets.

Purpose of the Study:

• To investigate the immune cell landscape and molecular mechanisms driving inflammation in ankylosing spondylitis (AS).
• To identify potential therapeutic targets by analyzing gene expression and cell-cell interactions in AS.

Main Methods:

• Single-cell RNA sequencing (scRNA-seq) was performed on bone marrow samples from AS patients and healthy controls.
• Differential gene expression analysis, protein-protein interaction network analysis, and immunohistochemistry were employed.
• Cell clustering, annotation, external dataset validation, and cell communication analysis were conducted.

Main Results:

• Single-cell sequencing identified distinct immune cell populations and gene expression profiles in AS.
• The gene CD74 was identified as a significant hub gene in T cells within AS samples.
• Interactions between T cells and NK cells, and the macrophage migration inhibitory factor signaling pathway were highlighted as important in AS.

Conclusions:

• CD74 upregulation in T cells is a key finding in AS immune dysregulation.
• T cell and NK cell interplay, along with macrophage migration inhibitory factor signaling, are critical components of AS pathology.
• These findings provide a foundation for developing targeted therapies for ankylosing spondylitis.