Current Overview of Multi-omics Analyses in Microscopic Polyangiitis and Granulomatosis with Polyangiitis

Area of Science:

• Immunology
• Genetics
• Systems Biology

Background:

• Anti-neutrophil cytoplasmic antibody-associated vasculitis (AAV) is an autoimmune condition impacting small blood vessels and causing systemic inflammation.
• Autoantibodies against neutrophil cytoplasmic antigens like myeloperoxidase (MPO) and proteinase 3 (PR3) characterize AAV.

Purpose of the Study:

• To review recent multi-omics research advancements in understanding AAV pathophysiology.
• To highlight the potential of these approaches for developing personalized diagnostic and therapeutic strategies in AAV.

Main Methods:

• Genomics (including GWASs) to identify genetic associations, particularly in the HLA region.
• Epigenomics to explore regulatory mechanisms influencing autoantigen gene expression.
• Transcriptomics (scRNA-seq, spatial transcriptomics) to reveal gene expression profiles and cellular interactions.
• Proteomics and metabolomics to identify potential diagnostic biomarkers.

Main Results:

• Multi-omics analyses have significantly enhanced the understanding of AAV's complex pathophysiology.
• Genetic studies pinpoint key associations within the human leukocyte antigen (HLA) region.
• Single-cell and spatial transcriptomics offer detailed insights into cellular landscapes of diseased tissues.
• Proteomic and metabolomic studies are identifying promising biomarkers for AAV.

Conclusions:

• Recent multi-omics research provides a deeper molecular and genetic understanding of AAV.
• These insights are crucial for advancing personalized medicine approaches in AAV diagnosis and treatment.
• Future strategies will leverage individual molecular profiles for tailored patient care.