Erythroid mitochondrial retention triggers myeloid-dependent type I interferon in human SLE.

Erythroid mitochondrial retention triggers myeloid-dependent type I interferon in human SLE.
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DOI:
10.1016/j.cell.2021.07.021
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发表时间:
2021-08-19
期刊:
影响因子:
64.5
通讯作者:
Pascual V
Pascual V
中科院分区:
生物学1区
文献类型:
--
作者:
Caielli S;Cardenas J;de Jesus AA;Baisch J;Walters L;Blanck JP;Balasubramanian P;Stagnar C;Ohouo M;Hong S;Nassi L;Stewart K;Fuller J;Gu J;Banchereau JF;Wright T;Goldbach-Mansky R;Pascual V

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Emerging evidence supports that mitochondrial dysfunction contributes to Systemic Lupus Erythematosus (SLE) pathogenesis. Here we show that programmed mitochondrial removal, a hallmark of mammalian erythropoiesis, is defective in SLE. Specifically, we demonstrate that during human erythroid cell maturation, a hypoxia-inducible factor (HIF)-mediated metabolic switch is responsible for the activation of the ubiquiting proteasome system (UPS), which precedes and its necessary for the autophagic removal of mitochondria. A defect in this pathway leads to accumulation of red blood cells (RBCs) carrying mitochondria (Mito+ RBCs) in SLE patients and in correlation with disease activity. Antibody-mediated internalization of Mito+ RBCs induces Type I interferon (IFN) production through activation of cGAS in macrophages (M⏀). Accordingly, SLE patients carrying both Mito+ RBCs and opsonizing antibodies display the highest levels of blood Interferon Stimulated Gene (ISG) signatures, a distinctive feature of SLE. A subgroup of SLE patients fail to engage HIF regulated metabolic and proteasomal pathways causing the accumulation of mitochondria-containing red blood cells. These cells, when engulfed by macrophages activate cGAS/STING dependent inflammation.
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