Dopamine neuron-derived IGF-1 controls dopamine neuron firing, skill learning, and exploration

Midbrain dopamine neurons, which can be regulated by neuropeptides and hormones, play a fundamental role in controlling cognitive processes, reward mechanisms, and motor functions. The hormonal actions of insulin-like growth factor 1 (IGF-1) produced by the liver have been well described, but the ro...

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Published inProceedings of the National Academy of Sciences - PNAS Vol. 116; no. 9; pp. 3817 - 3826
Main Authors Pristerà, Alessandro, Blomeley, Craig, Lopes, Emanuel, Threlfell, Sarah, Merlini, Elisa, Burdakov, Denis, Cragg, Stephanie, Guillemot, François, Ang, Siew-Lan
Format Journal Article
LanguageEnglish
Published United States National Academy of Sciences 26.02.2019
SeriesPNAS Plus
Subjects
Online AccessGet full text
ISSN0027-8424
1091-6490
1091-6490
DOI10.1073/pnas.1806820116

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Abstract Midbrain dopamine neurons, which can be regulated by neuropeptides and hormones, play a fundamental role in controlling cognitive processes, reward mechanisms, and motor functions. The hormonal actions of insulin-like growth factor 1 (IGF-1) produced by the liver have been well described, but the role of neuronally derived IGF-1 remains largely unexplored. We discovered that dopamine neurons secrete IGF-1 from the cell bodies following depolarization, and that IGF-1 controls release of dopamine in the ventral midbrain. In addition, conditional deletion of dopamine neuron-derived IGF-1 in adult mice leads to decrease of dopamine content in the striatum and deficits in dopamine neuron firing and causes reduced spontaneous locomotion and impairments in explorative and learning behaviors. These data identify that dopamine neuron-derived IGF-1 acts as a regulator of dopamine neurons and regulates dopamine-mediated behaviors.
AbstractList Midbrain dopamine neurons, which can be regulated by neuropeptides and hormones, play a fundamental role in controlling cognitive processes, reward mechanisms, and motor functions. The hormonal actions of insulin-like growth factor 1 (IGF-1) produced by the liver have been well described, but the role of neuronally derived IGF-1 remains largely unexplored. We discovered that dopamine neurons secrete IGF-1 from the cell bodies following depolarization, and that IGF-1 controls release of dopamine in the ventral midbrain. In addition, conditional deletion of dopamine neuron-derived IGF-1 in adult mice leads to decrease of dopamine content in the striatum and deficits in dopamine neuron firing and causes reduced spontaneous locomotion and impairments in explorative and learning behaviors. These data identify that dopamine neuron-derived IGF-1 acts as a regulator of dopamine neurons and regulates dopamine-mediated behaviors.
Midbrain dopamine neurons, which can be regulated by neuropeptides and hormones, play a fundamental role in controlling cognitive processes, reward mechanisms, and motor functions. The hormonal actions of insulin-like growth factor 1 (IGF-1) produced by the liver have been well described, but the role of neuronally derived IGF-1 remains largely unexplored. We discovered that dopamine neurons secrete IGF-1 from the cell bodies following depolarization, and that IGF-1 controls release of dopamine in the ventral midbrain. In addition, conditional deletion of dopamine neuron-derived IGF-1 in adult mice leads to decrease of dopamine content in the striatum and deficits in dopamine neuron firing and causes reduced spontaneous locomotion and impairments in explorative and learning behaviors. These data identify that dopamine neuron-derived IGF-1 acts as a regulator of dopamine neurons and regulates dopamine-mediated behaviors.Midbrain dopamine neurons, which can be regulated by neuropeptides and hormones, play a fundamental role in controlling cognitive processes, reward mechanisms, and motor functions. The hormonal actions of insulin-like growth factor 1 (IGF-1) produced by the liver have been well described, but the role of neuronally derived IGF-1 remains largely unexplored. We discovered that dopamine neurons secrete IGF-1 from the cell bodies following depolarization, and that IGF-1 controls release of dopamine in the ventral midbrain. In addition, conditional deletion of dopamine neuron-derived IGF-1 in adult mice leads to decrease of dopamine content in the striatum and deficits in dopamine neuron firing and causes reduced spontaneous locomotion and impairments in explorative and learning behaviors. These data identify that dopamine neuron-derived IGF-1 acts as a regulator of dopamine neurons and regulates dopamine-mediated behaviors.
Midbrain dopamine neurons play a role in motivational and cognitive control of behavior. In addition, they regulate motor functions. Dysregulation of dopamine neurons has been linked to depression, schizophrenia, and addiction and their degeneration is causal to Parkinson’s disease. Peripheral hormones have been shown to regulate dopamine neurons functions. Insulin-like growth factor 1 (IGF-1) is a hormone mainly produced in the liver. With this study we discovered that midbrain dopamine neurons synthesize and release IGF-1 in an activity dependent manner. In addition, dopamine neuron-derived IGF-1 modulates dopamine synthesis and dopamine neuron firing and ultimately it controls dopamine-dependent behaviors. This study highlights the neuromodulatory role of neuron-derived IGF-1 and its role in shaping dopamine transmission in the brain. Midbrain dopamine neurons, which can be regulated by neuropeptides and hormones, play a fundamental role in controlling cognitive processes, reward mechanisms, and motor functions. The hormonal actions of insulin-like growth factor 1 (IGF-1) produced by the liver have been well described, but the role of neuronally derived IGF-1 remains largely unexplored. We discovered that dopamine neurons secrete IGF-1 from the cell bodies following depolarization, and that IGF-1 controls release of dopamine in the ventral midbrain. In addition, conditional deletion of dopamine neuron-derived IGF-1 in adult mice leads to decrease of dopamine content in the striatum and deficits in dopamine neuron firing and causes reduced spontaneous locomotion and impairments in explorative and learning behaviors. These data identify that dopamine neuron-derived IGF-1 acts as a regulator of dopamine neurons and regulates dopamine-mediated behaviors.
Author Pristerà, Alessandro
Lopes, Emanuel
Cragg, Stephanie
Ang, Siew-Lan
Blomeley, Craig
Merlini, Elisa
Threlfell, Sarah
Burdakov, Denis
Guillemot, François
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Copyright Copyright © 2019 the Author(s). Published by PNAS.
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Keywords firing
IGF-1
behavior
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dopamine
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Edited by Richard D. Palmiter, University of Washington, Seattle, WA, and approved December 27, 2018 (received for review April 23, 2018)
Author contributions: A.P., C.B., E.L., S.T., S.C., and S.-L.A. designed research; A.P., C.B., E.L., S.T., and E.M. performed research; A.P., C.B., E.L., S.T., E.M., D.B., S.C., and S.-L.A. analyzed data; and A.P., F.G., and S.-L.A. wrote the paper.
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Snippet Midbrain dopamine neurons, which can be regulated by neuropeptides and hormones, play a fundamental role in controlling cognitive processes, reward mechanisms,...
Midbrain dopamine neurons play a role in motivational and cognitive control of behavior. In addition, they regulate motor functions. Dysregulation of dopamine...
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SubjectTerms Animals
Biological Sciences
Clonal deletion
Cognition - physiology
Cognitive ability
Corpus Striatum - metabolism
Corpus Striatum - physiology
Depolarization
Dopamine
Dopaminergic Neurons - metabolism
Dopaminergic Neurons - pathology
Dopaminergic Neurons - physiology
Exploration
Exploratory Behavior - physiology
Growth factors
Hormones
Hormones - metabolism
Insulin
Insulin-like growth factor I
Insulin-Like Growth Factor I - biosynthesis
Insulin-Like Growth Factor I - genetics
Insulin-like growth factors
Learning - physiology
Learning behavior
Liver
Locomotion
Locomotion - genetics
Locomotion - physiology
Mesencephalon
Mesencephalon - metabolism
Mesencephalon - physiology
Mice
Neostriatum
Neurons
Neuropeptides
Neuropeptides - genetics
PNAS Plus
Reinforcement
Title Dopamine neuron-derived IGF-1 controls dopamine neuron firing, skill learning, and exploration
URI https://www.jstor.org/stable/26672137
https://www.ncbi.nlm.nih.gov/pubmed/30808767
https://www.proquest.com/docview/2187128872
https://www.proquest.com/docview/2186621324
https://pubmed.ncbi.nlm.nih.gov/PMC6397563
Volume 116
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