Abstract:
:Lineage analysis of autoreactive B cells can reveal the origins of autoimmunity. In the autoimmune disease pemphigus vulgaris (PV), desmoglein 3 (DSG3) and DSG1 autoantibodies are predominantly of the IgG4 subclass and less frequently of IgG1 and IgA subclasses, prompting us to investigate whether anti-DSG IgG4 B cells share lineages with IgG1, IgA1, and IgA2. Combining subclass-specific B cell deep sequencing with high-throughput antibody screening, we identified 80 DSG-reactive lineages from 4 PV patients. Most anti-DSG IgG4 B cells lacked clonal relationships to other subclasses and preferentially targeted DSG adhesion domains, whereas anti-DSG IgA frequently evolved from or to other subclasses and recognized a broader range of epitopes. Our findings suggest that anti-DSG IgG4 B cells predominantly evolve independently or diverge early from other subclasses and that IgA is most often not the origin of IgG autoreactivity in PV. These data provide insight into how autoreactivity diversifies across B cell subclasses.
journal_name
Cell Repjournal_title
Cell reportsauthors
Ellebrecht CT,Mukherjee EM,Zheng Q,Choi EJ,Reddy SG,Mao X,Payne ASdoi
10.1016/j.celrep.2018.07.093subject
Has Abstractpub_date
2018-08-28 00:00:00pages
2370-2380issue
9issn
2211-1247pii
S2211-1247(18)31226-9journal_volume
24pub_type
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