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New Insights into the Role of Ferritin in Iron Homeostasis and Neurodegenerative Diseases

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Abstract

Growing evidence has indicated that iron deposition is one of the key factors leading to neuronal death in the neurodegenerative diseases. Ferritin is a hollow iron storage protein composed of 24 subunits of two types, ferritin heavy chain (FTH) and ferritin light chain (FTL), which plays an important role in maintaining iron homeostasis. Recently, the discovery of extracellular ferritin and ferritin in exosomes indicates that ferritin might be not only an iron storage protein within the cell, but might also be an important factor in the regulation of tissue and body iron homeostasis. In this review, we first described the structural characteristics, regulation and the physiological functions of ferritin. Secondly, we reviewed the current evidence concerning the mechanisms underlying the secretion of ferritin and the possible role of secreted ferritin in the brain. Then, we summarized the relationship between ferritin and the neurodegenerative diseases including Parkinson’s disease (PD), Alzheimer’s disease (AD) and neuroferritinopathy (NF). Given the importance and relationship between iron and neurodegenerative diseases, understanding the role of ferritin in the brain can be expected to contribute to our knowledge of iron dysfunction and neurodegenerative diseases.

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Abbreviations

3′-UTR:

3′-untranslated region

6-OHDA:

6-Hydroxydopamine

Aβ:

Amyloid-β

ALS:

Amyotrophic lateral sclerosis

AD:

Alzheimer’s disease

APP:

Amyloid-β protein precursor

BBB:

Blood-brain barrier

CSF:

Cerebrospinal fluid

DA:

Dopamine

DMT1:

Divalent metal transporter 1

eIF3:

Eukaryotic translation initiation factor 3

EpRE/ARE:

Electrophile/antioxidant-responsive element

Erk:

Extracellular signal-regulated kinase

FPN1:

Ferroportin 1

FTH:

Ferritin heavy chain

FTL:

Ferritin light chain

FtMt:

Mitochondrial ferritin

IL:

Interleukin

IRE:

Iron-responsive element

IRP:

Iron-regulatory protein

Lf:

Lactoferrin

LfR:

Lactoferrin receptor

LIP:

Labile iron pool

JNK:

c-Jun N-terminal kinase

MS:

Multiple sclerosis

NBIA:

Neurodegeneration with brain iron accumulation

NCOA4:

Nuclear receptor coactivator-4

NF:

Neuroferritinopathy

NF-κB:

Nuclear factor kappa B

NM:

Neuromelanin

Nrf2:

NF-E2-related factor 2

PD:

Parkinson’s disease

RNS:

Reactive nitrogen species

ROS:

Reactive oxygen species

SCARA5:

Scavenger receptor class A member 5

SF:

Synovial fluid

SN:

Substantia nigra

SNAP:

Synaptosomal-associated protein

SNpc:

Substantia nigra pars compacta

SP:

Senile plaques

STX:

Syntaxin

Tf:

Transferrin

TfR:

Transferrin receptor

Tim:

T cell immunoglobulin and mucin domain-containing protein

TNF-α:

Tumor necrosis factor-α

TRIM16:

Tripartite motif-containing protein 16

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Funding

This work was supported by grants from the National Foundation of Natural Science of China (31871202, 31771124), the Department of Science and Technology of Shandong Province (ZR2019MC057), Excellent Innovative Team of Shandong Province (2020KJK007), and Taishan Scholars Construction Project, Shandong.

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HX conceived the original idea and designed the outlines of the study. NZ and XY conducted the literature review and prepared the figures for the manuscript. NZ wrote the manuscript. JX contributed to the editing of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Junxia Xie or Huamin Xu.

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Zhang, N., Yu, X., Xie, J. et al. New Insights into the Role of Ferritin in Iron Homeostasis and Neurodegenerative Diseases. Mol Neurobiol 58, 2812–2823 (2021). https://doi.org/10.1007/s12035-020-02277-7

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Keywords

  • Ferritin
  • Iron
  • Parkinson’s disease
  • Alzheimer’s disease
  • Neuroferritinopathy