Allergic diseases in systemic lupus erythematosus: prevalence and immunological considerations.

We attempted to obtain a deeper understanding of the relationship between systemic lupus erythematosus (SLE) and allergic diseases through comparative studies. Accordingly, we reviewed the association of both disorders and compared their immunological features based on the literature and our own findings. Recent studies (including ours) have indicated that the risk of IgE-mediated and/or associated allergic diseases is not markedly increased in SLE patients despite their more allergic family history when compared with controls, in contrast with earlier studies. This may be related to a change of the environmental factors contributing to allergy. In addition, assessment of the immunological similarities and differences between SLE and various allergic diseases seems to be useful for understanding the relationship between them.