Antigen-specific Fab profiling achieves molecular-resolution analysis of human autoantibody repertoires in rheumatoid arthritis.
Eva Maria StorkDanique M H van RijswijkKarin Anna van SchieMax HoekTheresa KisselHans Ulrich SchererThomas Wj HuizingaAlbert J R HeckRené E M ToesAlbert BondtPublished in: Nature communications (2024)
The presence of autoantibodies is a defining feature of many autoimmune diseases. The number of unique autoantibody clones is conceivably limited by immune tolerance mechanisms, but unknown due to limitations of the currently applied technologies. Here, we introduce an autoantigen-specific liquid chromatography-mass spectrometry-based IgG1 Fab profiling approach using the anti-citrullinated protein antibody (ACPA) repertoire in rheumatoid arthritis (RA) as an example. We show that each patient harbors a unique and diverse ACPA IgG1 repertoire dominated by only a few antibody clones. In contrast to the total plasma IgG1 antibody repertoire, the ACPA IgG1 sub-repertoire is characterised by an expansion of antibodies that harbor one, two or even more Fab glycans, and different glycovariants of the same clone can be detected. Together, our data indicate that the autoantibody response in a prominent human autoimmune disease is complex, unique to each patient and dominated by a relatively low number of clones.
Keyphrases
- rheumatoid arthritis
- mass spectrometry
- liquid chromatography
- endothelial cells
- high throughput sequencing
- disease activity
- case report
- induced pluripotent stem cells
- single cell
- systemic lupus erythematosus
- machine learning
- ankylosing spondylitis
- pluripotent stem cells
- interstitial lung disease
- high resolution mass spectrometry
- magnetic resonance
- multiple sclerosis
- electronic health record
- high resolution
- big data
- small molecule
- ms ms
- capillary electrophoresis
- amino acid
- systemic sclerosis
- artificial intelligence
- data analysis