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- W2066930190 abstract "Dermatomyositis (DM) is an autoimmune disease marked by chronic inflammation of skin and muscle tissues and characterized clinically by proximal muscle weakness and skin eruption, including heliotrope rash, and Gottron's sign. Treatment with a non-specific immunosuppressive agent or anti-inflammatory corticosteroids is beneficial, although some patients are resistant to these therapies. Proinflammatory cytokines derived from infiltrating inflammatory cells and activated resident cells within skin and muscle tissues likely promote chronic inflammation in DM pathogenesis; however, molecular mechanisms underlying the disease are not completely defined. Here we show that mRNA and protein levels of angiopoietin-like protein 2 (Angptl2), a recently identified chronic inflammation mediator, are abundant in keratinocytes from DM patients' skin eruptions. To examine whether skin cell-derived Angptl2 promotes DM manifestations, we analyzed transgenic (Tg) mice expressing Angptl2 driven by the keratinocyte specific promoter K14 (K14-Angptl2) and therefore constitutively expressing Angptl2 in skin tissue. We found that K14-Angptl2 Tg mice exhibited skin phenotypes similar to those observed in DM patients. In addition, treatment of keratinocytes with exogenous Angptl2 activated the NF-κB inflammatory cascade, resulting in increased expression of the proinflammatory cytokines IL-1β and IL-6. We propose that keratinocyte-derived Angptl2 functions in DM pathogenesis by inducing chronic inflammation in skin tissue." @default.
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- W2066930190 date "2012-02-01" @default.
- W2066930190 modified "2023-09-26" @default.
- W2066930190 title "The role of angiopoietin-like protein 2 in pathogenesis of dermatomyositis" @default.
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- W2066930190 doi "https://doi.org/10.1016/j.bbrc.2012.01.052" @default.
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