HMGB1 Mediates Inflammation-Induced DMT1 Increase and Dopaminergic Neurodegeneration in the Early Stage of Parkinsonism

© 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature..

Both neuroinflammation and iron accumulation play roles in the pathogenesis of Parkinson's disease (PD). However, whether inflammation induces iron dyshomeostasis in dopaminergic neurons at an early stage of PD, at which no quantifiable dopaminergic neuron loss can be observed, is still unknown. As for the inflammation mediators, although several cytokines have been reported to increase in PD, the functions of these cytokines in the SN are double-edged and controversial. In this study, whether inflammation could induce iron dyshomeostasis in dopaminergic neurons through high mobility group protein B1 (HMGB1) in the early stage of PD is explored. Lipopolysaccharide (LPS), a toxin that primarily activates glia cells, and 6-hydroxydopamine (6-OHDA), the neurotoxin that firstly impacts dopaminergic neurons, were utilized to mimic PD in rats. We found a common and exceedingly early over-production of HMGB1, followed by an increase of divalent metal transporter 1 with iron responsive element (DMT1+) in the dopaminergic neurons before quantifiable neuronal loss. HMGB1 neutralizing antibody suppressed inflammation in the SN, DMT1+ elevation in dopaminergic neurons, and dopaminergic neuronal loss in both LPS and 6-OHDA administration- induced PD models. On the contrary, interleukin-1β inhibitor diacerein failed to suppress these outcomes induced by 6-OHDA. Our findings not only demonstrate that inflammation could be one of the causes of DMT1+ increase in dopaminergic neurons, but also highlight HMGB1 as a pivotal early mediator of inflammation-induced iron increase and subsequent neurodegeneration, thereby HMGB1 could serve as a potential target for early-stage PD treatment.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:61

Enthalten in:

Molecular neurobiology - 61(2024), 4 vom: 28. Apr., Seite 2006-2020

Sprache:

Englisch

Beteiligte Personen:

Liang, Tuo [VerfasserIn]
Yang, Sheng-Xi [VerfasserIn]
Qian, Christopher [VerfasserIn]
Du, Li-Da [VerfasserIn]
Qian, Zhong-Ming [VerfasserIn]
Yung, Wing-Ho [VerfasserIn]
Ke, Ya [VerfasserIn]

Links:

Volltext

Themen:

8HW4YBZ748
Cytokines
DMT1
Dopamine
Dopaminergic neurons
E1UOL152H7
HMGB1
HMGB1 Protein
Hbp1 protein, rat
Iron
Journal Article
Lipopolysaccharides
Neuroinflammation
Oxidopamine
Parkinson’s disease
Solute carrier family 11- (proton-coupled divalent metal ion transporters), member 2
VTD58H1Z2X

Anmerkungen:

Date Completed 28.03.2024

Date Revised 01.04.2024

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1007/s12035-023-03668-2

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM36326423X