Cited by 60Parkinson's Disease Mechanisms and TreatmentsNuclear Receptors and SignalingRegulation of Appetite and Obesity

Down-regulation of ghrelin receptors on dopaminergic neurons in the substantia nigra contributes to Parkinson’s disease-like motor dysfunction

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Suda, Yukari, Kuzumaki, Naoko, Sone, Takefumi, Narita, Michiko, Tanaka, Kenichi, Hamada, Yusuke, Iwasawa, Chizuru, Shibasaki, Masahiro +6 more·2018·Molecular Brain

Abstract

Ghrelin exerts a wide range of physiological actions throughout the body and appears to be a promising target for disease therapy. Endogenous ghrelin receptors (GHSRs) are present in extrahypothalamic sites including the substantia nigra pars compacta (SNc), which is related to phenotypic dysregulation or frank degeneration in Parkinson's disease (PD). Here we found a dramatic decrease in the expression of GHSR in PD-specific induced pluripotent stem cell (iPSC)-derived dopaminergic (DAnergic) neurons generated from patients carrying parkin gene (PARK2) mutations compared to those from healthy controls. Consistently, a significant decrease in the expression of GHSR was found in DAnergic neurons of isogenic PARK2-iPSC lines that mimicked loss of function of the PARK2 gene through CRISPR Cas9 technology. Furthermore, either intracerebroventricular injection or microinjection into the SNc of the selective GHSR1a antagonist [D-Lys3]-GHRP6 in normal mice produced cataleptic behaviors related to dysfunction of motor coordination. These findings suggest that the down-regulation of GHSRs in SNc-DA neurons induced the initial dysfunction of DA neurons, leading to extrapyramidal disorder under PD.

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Authors
Suda, Y., Kuzumaki, N., Sone, T., Narita, M., Tanaka, K., Hamada, Y., Iwasawa, C., Shibasaki, M., Maekawa, A., Matsuo, M., Akamatsu, W., Hattori, N., Okano, H., & Narita, M.
Affiliations
  • Hoshi University (JP)
  • Keio University (JP)
  • Institute of Medical Science, The University of Tokyo (JP)
  • Juntendo University (JP)
Corresponding author
  • Kuzumaki, Naoko
  • Narita, Michiko
  • Okano, Hideyuki
  • Narita, Minoru
Venue
Molecular Brain
Published
2018-02-20
Volume
11
Issue
1
Pages
6-6
ISSN
1756-6606 (ISSN-L)
OpenAlex
W2795703705
Cited by
60
References
29
Citations by year
2026: 2 · 2025: 8 · 2024: 7 · 2023: 6 · 2022: 10 · 2021: 11 · 2020: 6 · 2019: 7 · 2018: 3
FWCI
4.58
Type
journal article
Language
en
Open access
Locations
  • Molecular Brain (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Japan Society for the Promotion of Science (JP16K08280, JP25830055)
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nuclear Receptors and Signaling
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
growth hormone secretagogue receptor, Parkinson's disease, substantia nigra pars compacta, dopaminergic neurons, Parkin, PARK2 mutations, iPSC-derived neurons, catalepsy, motor impairment, extrapyramidal disorders
MeSH terms
Animals, Cell Differentiation, Cell Line, Humans, Injections, Intraventricular, Male, Mice, Inbred C57BL, Motor Activity, Oligopeptides, Parkinson Disease, Substantia Nigra, Down-Regulation, Ubiquitin-Protein Ligases, Receptors, Ghrelin, Gene Knockout Techniques, Gene Knock-In Techniques, Induced Pluripotent Stem Cells, Dopaminergic Neurons

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