The distribution of IgG subclasses in the lupus band suggests disease-specific alteration in subclass switching rather than polyclonal B-cell activation.
Deposition of immunoglobulins in the skin of patients with lupus erythematosus (LE), demonstrable as a linear band 'lupus band' at the basement membrane zone (BMZ) by direct immunofluorescence, was first described in 1963. Four decades after the discovery of the lupus band, a basic question regarding the origin of immunoglobulins of the lupus band is still unanswered. Is the lupus band just a manifestation of polyclonal B-cell activation commonly seen in systemic LE (SLE)? The distribution of...Expand abstract
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