title: The Janus of lupus--benefits and risks with B-cell therapy.
abstract: Janus was the Roman god of doorways and beginnings. Thus, if B-cell directed therapy is indeed the beginning of a new era in SLE therapy, his would be an appropriate face to regard in this context. But there is a problem: he is a two-faced god. Janus faces in two different directions: past and future, youth and adulthood, barbarism and civility. With respect to biological treatments, perhaps Janus' faces are the efficacy and the safety dimensions of therapy. In this review, I will consider Janus' second face, the safety side of B-cell therapy. I will argue that, while safety data have been rather reassuring so far, vigilance is required; and I will point out three specific mistaken assumptions regarding the safety of B-cell directed therapy in SLE.
authors.affiliation: Rheumatology Unit, The Karolinska Institute, Stockholm, Sweden. ronald.van.vollenhoven@ki.se
authors.forename: R F
authors.initials: RF
authors.lastname: van Vollenhoven
mesh_terms: D001402:B-Lymphocytes / Q000276:immunology*; D006801:Humans; D007167:Immunotherapy / Q000009:adverse effects*; D008180:Lupus Erythematosus, Systemic / Q000276:immunology* / Q000628:therapy*; D012306:Risk