The Mitochondrion-lysosome Axis in Adaptive and Innate Immunity: Effect of Lupus Regulator Peptide P140 on Mitochondria Autophagy and NETosis

被引:22
作者
Bendorius, Mykolas [1 ]
Neeli, Indira [2 ]
Wang, Fengjuan [1 ]
Bonam, Srinivasa Reddy [1 ]
Dombi, Eszter [3 ]
Buron, Nelly [4 ]
Borgne-Sanchez, Annie [4 ]
Poulton, Joanna [3 ]
Radic, Marko [2 ]
Muller, Sylviane [1 ,5 ]
机构
[1] Strasbourg Univ, CNRS, Unit Biotechnol & Cell Signaling, Lab Excellence Medalis, Illkirch Graffenstaden, France
[2] Univ Tennessee, Ctr Hlth Sci, Dept Microbiol Immunol & Biochem, Memphis, TN 38163 USA
[3] Womens Ctr, Nuffield Dept Womens & Reprod Hlth, Oxford, England
[4] Mitologics SAS, Paris, France
[5] Univ Strasbourg, Inst Adv Study, Strasbourg, France
关键词
NETosis; autophagy; mitochondrion; systemic lupus erythematosus; neuroinflammation; P140; peptide; NEUTROPHIL EXTRACELLULAR TRAPS; THERAPEUTIC PEPTIDE; DNA; ERYTHEMATOSUS; MECHANISMS; PHOSPHORYLATION; IDENTIFICATION; AUTOANTIGENS; AUTOIMMUNITY; TRAFFICKING;
D O I
10.3389/fimmu.2018.02158
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Mitochondria deserve special attention as sensors of cellular energy homeostasis and metabolic state. Moreover, mitochondria integrate intra-and extra-cellular signals to determine appropriate cellular responses that range from proliferation to cell death. In autoimmunity, as in other inflammatory chronic disorders, themetabolismof immune cells may be extensively remodeled, perturbing sensitive tolerogenic mechanisms. Here, we examine the distribution and effects of the therapeutic 21-mer peptide called P140, which shows remarkable efficacy inmodulating immune responses in inflammatory settings. We measured P140 and control peptide effects on isolated mitochondria, the distribution of peptides in live cells, and their influence on the levels of key autophagy regulators. Our data indicate that while P140 targets macro-and chaperone-mediated autophagy processes, it has little effect, if any, on mitochondrial autophagy. Remarkably, however, it suppresses NET release from neutrophils exposed to immobilized NET-anti-DNA IgG complexes. Together, our results suggest that in the mitochondrion-lysosome axis, a likely driver of NETosis and inflammation, the P140 peptide does not operate by affecting mitochondria directly.
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页数:12
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