Isolevuglandins Promote Autoimmunity And Hypertension In Systemic Lupus Erythematosus
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Hypertension, vascular inflammation and renal inflammation are characteristic of systemic lupus erythematosus (SLE), a multisystem autoimmune illness that’s complex and poorly understood. Oxidation products of arachidonic and different fatty acids, termed isolevuglandins (isoLG) lead to formation of post-translational protein modifications which are immunogenic. We exhibit isoLG enrichment in dendritic cells (DCs), B cells, and plasma cells from juvenile feminine B6.SLE123 mice. In adult B6.SLE123 and NZBWF1 mice, isoLG adducts are enriched in plasma cells and splenic DCs compared to C57Bl/6 and NZW mice respectively. Remedy with the isoLG-scavenger 2-hydroxybenzylamine (2 hydroxybenzylamine-HOBA) diminished blood pressure, improved renal operate, and attenuated renal harm. Furthermore, 2-HOBA diminished bone marrow plasma cells, complete IgG ranges, and anti-dsDNA antibody titers. We also display that mice with SLE generate specific IgG antibodies against isoLG adducted protein, confirming the immunogenicity of isoLG adducts. Finally, we found that isoLG adducted peptides are markedly enriched in monocytes from patients with SLE which was accompanied by an increase in superoxide manufacturing. These findings help a task of isoLG adducts within the genesis and maintenance of systemic autoimmunity and its associated hypertension in SLE. Scavenging of isoLGs promises to be a novel therapy for this disease.
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