Dysregulation of intracellular copper homeostasis is common to transgenic mice expressing human mutant superoxide dismutase-1s regardless of their copper-binding abilities

Eiichi Tokuda, Eriko Okawa, Shunsuke Watanabe, Shin Ichi Ono, Stefan L. Marklund

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Over 170 mutations in superoxide dismutase-1 (SOD1) have been linked to amyotrophic lateral sclerosis (ALS). The properties of SOD1 mutants differ considerably including copper-binding abilities. Nevertheless, they cause the same disease phenotype, suggesting a common neurotoxic pathway. We have previously reported that copper homeostasis is disturbed in spinal cords of SOD1G93A mice. However, it is unknown whether copper dyshomeostasis is induced by other SOD1 mutants. Using the additional mouse strains SOD1G127insTGGG, SOD1G85R, and SOD1D90A, which express SOD1 mutants with different copper-binding abilities, we show that copper dyshomeostasis is common to SOD1 mutants. The SOD1 mutants shifted the copper trafficking systems toward copper accumulation in spinal cords of the mice. Copper contents bound to the SOD1 active site varied considerably between SOD1 mutants. Still, copper bound to other ligands in the spinal cord were markedly increased in all. Zinc was also increased, whereas there were no changes in magnesium, calcium, aluminum, manganese and iron. Further support for a role of copper dyshomeostasis in ALS was gained from results of pharmacological intervention. Ammonium tetrathiomolybdate (TTM), a copper chelating agent, prolonged survival and slowed the disease progression of SOD1G93A mice, even when the treatment was started after the disease onset. TTM markedly attenuated pathology, including the loss of motor neurons and axons, and atrophy of skeletal muscles. Additionally, TTM decreased amounts of SOD1 aggregates. We propose that pharmacological agents that are capable of modulating copper dyshomeostasis, such as TTM, might be beneficial for the treatment of ALS caused by SOD1 mutations.

Original languageEnglish
Pages (from-to)308-319
Number of pages12
JournalNeurobiology of Disease
Volume54
DOIs
Publication statusPublished - 2013 Jun
Externally publishedYes

Fingerprint

Transgenic Mice
Superoxide Dismutase
Copper
Homeostasis
Amyotrophic Lateral Sclerosis
Spinal Cord
Superoxide Dismutase-1
Pharmacology
Mutation
Motor Neurons
Chelating Agents
Manganese
Aluminum
Magnesium
Atrophy
Axons
Disease Progression
Zinc
Catalytic Domain
Skeletal Muscle

Keywords

  • Amyotrophic lateral sclerosis
  • Copper homeostasis
  • Superoxide dismutase-1
  • Tetrathiomolybdate

ASJC Scopus subject areas

  • Neurology

Cite this

Dysregulation of intracellular copper homeostasis is common to transgenic mice expressing human mutant superoxide dismutase-1s regardless of their copper-binding abilities. / Tokuda, Eiichi; Okawa, Eriko; Watanabe, Shunsuke; Ono, Shin Ichi; Marklund, Stefan L.

In: Neurobiology of Disease, Vol. 54, 06.2013, p. 308-319.

Research output: Contribution to journalArticle

@article{462f98c34125481eabc36a3262bd6919,
title = "Dysregulation of intracellular copper homeostasis is common to transgenic mice expressing human mutant superoxide dismutase-1s regardless of their copper-binding abilities",
abstract = "Over 170 mutations in superoxide dismutase-1 (SOD1) have been linked to amyotrophic lateral sclerosis (ALS). The properties of SOD1 mutants differ considerably including copper-binding abilities. Nevertheless, they cause the same disease phenotype, suggesting a common neurotoxic pathway. We have previously reported that copper homeostasis is disturbed in spinal cords of SOD1G93A mice. However, it is unknown whether copper dyshomeostasis is induced by other SOD1 mutants. Using the additional mouse strains SOD1G127insTGGG, SOD1G85R, and SOD1D90A, which express SOD1 mutants with different copper-binding abilities, we show that copper dyshomeostasis is common to SOD1 mutants. The SOD1 mutants shifted the copper trafficking systems toward copper accumulation in spinal cords of the mice. Copper contents bound to the SOD1 active site varied considerably between SOD1 mutants. Still, copper bound to other ligands in the spinal cord were markedly increased in all. Zinc was also increased, whereas there were no changes in magnesium, calcium, aluminum, manganese and iron. Further support for a role of copper dyshomeostasis in ALS was gained from results of pharmacological intervention. Ammonium tetrathiomolybdate (TTM), a copper chelating agent, prolonged survival and slowed the disease progression of SOD1G93A mice, even when the treatment was started after the disease onset. TTM markedly attenuated pathology, including the loss of motor neurons and axons, and atrophy of skeletal muscles. Additionally, TTM decreased amounts of SOD1 aggregates. We propose that pharmacological agents that are capable of modulating copper dyshomeostasis, such as TTM, might be beneficial for the treatment of ALS caused by SOD1 mutations.",
keywords = "Amyotrophic lateral sclerosis, Copper homeostasis, Superoxide dismutase-1, Tetrathiomolybdate",
author = "Eiichi Tokuda and Eriko Okawa and Shunsuke Watanabe and Ono, {Shin Ichi} and Marklund, {Stefan L.}",
year = "2013",
month = "6",
doi = "10.1016/j.nbd.2013.01.001",
language = "English",
volume = "54",
pages = "308--319",
journal = "Neurobiology of Disease",
issn = "0969-9961",
publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Dysregulation of intracellular copper homeostasis is common to transgenic mice expressing human mutant superoxide dismutase-1s regardless of their copper-binding abilities

AU - Tokuda, Eiichi

AU - Okawa, Eriko

AU - Watanabe, Shunsuke

AU - Ono, Shin Ichi

AU - Marklund, Stefan L.

PY - 2013/6

Y1 - 2013/6

N2 - Over 170 mutations in superoxide dismutase-1 (SOD1) have been linked to amyotrophic lateral sclerosis (ALS). The properties of SOD1 mutants differ considerably including copper-binding abilities. Nevertheless, they cause the same disease phenotype, suggesting a common neurotoxic pathway. We have previously reported that copper homeostasis is disturbed in spinal cords of SOD1G93A mice. However, it is unknown whether copper dyshomeostasis is induced by other SOD1 mutants. Using the additional mouse strains SOD1G127insTGGG, SOD1G85R, and SOD1D90A, which express SOD1 mutants with different copper-binding abilities, we show that copper dyshomeostasis is common to SOD1 mutants. The SOD1 mutants shifted the copper trafficking systems toward copper accumulation in spinal cords of the mice. Copper contents bound to the SOD1 active site varied considerably between SOD1 mutants. Still, copper bound to other ligands in the spinal cord were markedly increased in all. Zinc was also increased, whereas there were no changes in magnesium, calcium, aluminum, manganese and iron. Further support for a role of copper dyshomeostasis in ALS was gained from results of pharmacological intervention. Ammonium tetrathiomolybdate (TTM), a copper chelating agent, prolonged survival and slowed the disease progression of SOD1G93A mice, even when the treatment was started after the disease onset. TTM markedly attenuated pathology, including the loss of motor neurons and axons, and atrophy of skeletal muscles. Additionally, TTM decreased amounts of SOD1 aggregates. We propose that pharmacological agents that are capable of modulating copper dyshomeostasis, such as TTM, might be beneficial for the treatment of ALS caused by SOD1 mutations.

AB - Over 170 mutations in superoxide dismutase-1 (SOD1) have been linked to amyotrophic lateral sclerosis (ALS). The properties of SOD1 mutants differ considerably including copper-binding abilities. Nevertheless, they cause the same disease phenotype, suggesting a common neurotoxic pathway. We have previously reported that copper homeostasis is disturbed in spinal cords of SOD1G93A mice. However, it is unknown whether copper dyshomeostasis is induced by other SOD1 mutants. Using the additional mouse strains SOD1G127insTGGG, SOD1G85R, and SOD1D90A, which express SOD1 mutants with different copper-binding abilities, we show that copper dyshomeostasis is common to SOD1 mutants. The SOD1 mutants shifted the copper trafficking systems toward copper accumulation in spinal cords of the mice. Copper contents bound to the SOD1 active site varied considerably between SOD1 mutants. Still, copper bound to other ligands in the spinal cord were markedly increased in all. Zinc was also increased, whereas there were no changes in magnesium, calcium, aluminum, manganese and iron. Further support for a role of copper dyshomeostasis in ALS was gained from results of pharmacological intervention. Ammonium tetrathiomolybdate (TTM), a copper chelating agent, prolonged survival and slowed the disease progression of SOD1G93A mice, even when the treatment was started after the disease onset. TTM markedly attenuated pathology, including the loss of motor neurons and axons, and atrophy of skeletal muscles. Additionally, TTM decreased amounts of SOD1 aggregates. We propose that pharmacological agents that are capable of modulating copper dyshomeostasis, such as TTM, might be beneficial for the treatment of ALS caused by SOD1 mutations.

KW - Amyotrophic lateral sclerosis

KW - Copper homeostasis

KW - Superoxide dismutase-1

KW - Tetrathiomolybdate

UR - http://www.scopus.com/inward/record.url?scp=84876336692&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84876336692&partnerID=8YFLogxK

U2 - 10.1016/j.nbd.2013.01.001

DO - 10.1016/j.nbd.2013.01.001

M3 - Article

C2 - 23321002

AN - SCOPUS:84876336692

VL - 54

SP - 308

EP - 319

JO - Neurobiology of Disease

JF - Neurobiology of Disease

SN - 0969-9961

ER -