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Autophagy. 2016 Dec;12(12):2374-2385. Epub 2016 Oct 18.

A novel PINK1- and PARK2-dependent protective neuroimmune pathway in lethal sepsis.

Author information

1
a Department of Surgery , University of Pittsburgh , Pittsburgh , PA , USA.
2
b State Key Laboratory of Trauma, Burns and Combined Injury, Research Institute of Surgery, Research institute for Traffic Medicine of People's Liberation Army, Daping Hospital, Third Military Medical University , Chongqing , China.
3
c Department of Neurology , Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University , Guangzhou, Guangdong , China.
4
d Department of Neurology.
5
e Centre of DAMP Biology, Third Affiliated Hospital of Guangzhou Medical University , Guangzhou, Guangdong , China.
6
f Department of Pediatrics , Xiangya Hospital, Central South University , Changsha, Hunan , China.
7
g Life Sciences Institute and Department of Molecular, Cellular and Developmental Biology , University of Michigan , Ann Arbor , MI , USA.
8
h Laboratory of Emergency Medicine, The Feinstein Institute for Medical Research , Manhasset , NY , USA.

Abstract

Although the PINK1-PARK2 pathway contributes to the pathogenesis of Parkinson disease, its roles in sepsis (a major challenge for critical care) were previously unknown. Here, we show that pink1-/- and park2-/- mice are more sensitive to polymicrobial sepsis-induced multiple organ failure and death. The decrease in the circulating level of the neurotransmitter dopamine in pink1-/- and park2-/- mice accelerates the release of a late sepsis mediator, HMGB1, via HIF1A-dependent anaerobic glycolysis and subsequent NLRP3-dependent inflammasome activation. Genetic depletion of Nlrp3 or Hif1a in pink1-/- and park2-/- mice confers protection against lethal polymicrobial sepsis. Moreover, pharmacological administration of dopamine agonist (e.g., pramipexole), HMGB1-inhibitor (e.g., neutralizing antibody or glycyrrhizin), or NLRP3-inhibitor (e.g., MCC950) reduces septic death in pink1-/- and park2-/- mice. The mRNA expression of HIF1A and NLRP3 is upregulated, whereas the mRNA expression of PINK1 and PARK2 is downregulated in peripheral blood mononuclear cells of patients with sepsis. Thus, an impaired PINK1-PARK2-mediated neuroimmunology pathway contributes to septic death and may represent a novel therapeutic target in critical care medicine.

KEYWORDS:

HMGB1; IL1A; PARK2; PINK1; hypoxia; inflammasome; mitophagy; sepsis

PMID:
27754761
PMCID:
PMC5173260
DOI:
10.1080/15548627.2016.1239678
[Indexed for MEDLINE]
Free PMC Article

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