Journal
EXPERT OPINION ON INVESTIGATIONAL DRUGS
Volume 28, Issue 1, Pages 85-92Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/13543784.2019.1551358
Keywords
JAK; Jakinib; lupus; targeted; therapeutic; systemic lupus; SLE; autoimmune disease
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Introduction: Multiple pathways are involved in the pathogenesis of systemic lupus erythematosus (SLE). The Janus kinase-signal transducers and activators of transcription (JAK-STAT) pathway mediates the intracellular signals of more than 60 cytokines, growth factors and hormones from the type I/II cytokine receptors. Dysregulation of the cytokines is a hallmark of SLE; inhibition of downstream signaling mediated by the JAKs is an attractive therapeutic option. Areas covered: This article reviews the preliminary data concerning the efficacy of the JAK inhibitors (Jakinibs) in SLE. JAK inhibition has shown promise in murine lupus dermatitis and nephritis. Ex-vivo studies of human SLE have demonstrated the effect of JAK1/2 inhibition on the activation of the STAT proteins and autoantibody production from B cells. A Phase II trial reported modest efficacy of baricitinib in improving synovitis in SLE patients. Expert opinions: Inhibition of the JAK-STAT pathway is an attractive therapeutic option. The convenience of oral administration and lower production cost of the Jakinibs could replace the biological agents in the treatment hierarchy of autoimmune inflammatory diseases. Additional clinical data are needed; results of ongoing studies of the newer Jakinibs in cutaneous and non-life-threatening lupus are eagerly awaited.
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