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J Immunol. 2014 Jun 1;192(11):5296-304. doi: 10.4049/jimmunol.1400653. Epub 2014 Apr 28.

Endothelial PINK1 mediates the protective effects of NLRP3 deficiency during lethal oxidant injury.

Author information

1
Section of Pulmonary, Critical Care, and Sleep Medicine, Yale University School of Medicine, New Haven, CT 06520.
2
Section of Pulmonary, Critical Care, and Sleep Medicine, Yale University School of Medicine, New Haven, CT 06520 patty.lee@yale.edu.

Abstract

High levels of inspired oxygen, hyperoxia, are frequently used in patients with acute respiratory failure. Hyperoxia can exacerbate acute respiratory failure, which has high mortality and no specific therapies. We identified novel roles for PTEN-induced putative kinase 1 (PINK1), a mitochondrial protein, and the cytosolic innate immune protein NLRP3 in the lung and endothelium. We generated double knockouts (PINK1(-/-)/NLRP3(-/-)), as well as cell-targeted PINK1 silencing and lung-targeted overexpression constructs, to specifically show that PINK1 mediates cytoprotection in wild-type and NLRP3(-/-) mice. The ability to resist hyperoxia is proportional to PINK1 expression. PINK1(-/-) mice were the most susceptible; wild-type mice, which induced PINK1 after hyperoxia, had intermediate susceptibility; and NLRP3(-/-) mice, which had high basal and hyperoxia-induced PINK1, were the least susceptible. Genetic deletion of PINK1 or PINK1 silencing in the lung endothelium increased susceptibility to hyperoxia via alterations in autophagy/mitophagy, proteasome activation, apoptosis, and oxidant generation.

PMID:
24778451
PMCID:
PMC4047670
DOI:
10.4049/jimmunol.1400653
[Indexed for MEDLINE]
Free PMC Article

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