Cited by 524Circadian rhythm and melatoninNeuroinflammation and Neurodegeneration MechanismsGenetics, Aging, and Longevity in Model Organisms

The DOI matches its Crossref record; 59 of the 59 references it cites were found in a registry or an index.

Circadian clock proteins regulate neuronal redox homeostasis and neurodegeneration

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Abstract

Brain aging is associated with diminished circadian clock output and decreased expression of the core clock proteins, which regulate many aspects of cellular biochemistry and metabolism. The genes encoding clock proteins are expressed throughout the brain, though it is unknown whether these proteins modulate brain homeostasis. We observed that deletion of circadian clock transcriptional activators aryl hydrocarbon receptor nuclear translocator-like (Bmal1) alone, or circadian locomotor output cycles kaput (Clock) in combination with neuronal PAS domain protein 2 (Npas2), induced severe age-dependent astrogliosis in the cortex and hippocampus. Mice lacking the clock gene repressors period circadian clock 1 (Per1) and period circadian clock 2 (Per2) had no observed astrogliosis. Bmal1 deletion caused the degeneration of synaptic terminals and impaired cortical functional connectivity, as well as neuronal oxidative damage and impaired expression of several redox defense genes. Targeted deletion of Bmal1 in neurons and glia caused similar neuropathology, despite the retention of intact circadian behavioral and sleep-wake rhythms. Reduction of Bmal1 expression promoted neuronal death in primary cultures and in mice treated with a chemical inducer of oxidative injury and striatal neurodegeneration. Our findings indicate that BMAL1 in a complex with CLOCK or NPAS2 regulates cerebral redox homeostasis and connects impaired clock gene function to neurodegeneration.

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Metadata

Authors
Musiek, E. S., Lim, M. M., Yang, G., Bauer, A. Q., Qi, L., Lee, Y., Roh, J. H., Ortiz-Gonzalez, X., Dearborn, J. T., Culver, J. P., Herzog, E. D., Hogenesch, J. B., Wozniak, D. F., Dikranian, K., Giasson, B. I., Weaver, D. R., Holtzman, D. M., & FitzGerald, G. A.
Affiliations
  • Washington University in St. Louis (US)
  • University of Pennsylvania (US)
  • University of Florida (US)
  • University of Massachusetts Chan Medical School (US)
Venue
Journal of Clinical Investigation
Published
2013-11-25
Volume
123
Issue
12
Pages
5389-5400
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2003062381
Cited by
524
References
59
Citations by year
2026: 35 · 2025: 54 · 2024: 46 · 2023: 58 · 2022: 53 · 2021: 48 · 2020: 47 · 2019: 34 · 2018: 42 · 2017: 29 · 2016: 30 · 2015: 23 · 2014: 23 · 2013: 2
FWCI
14.04
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Digital Commons@Becker (Washington University School of Medicine) (submittedVersion)
  • eScholarship@UMassChan (submittedVersion, other-oa)
Funders
  • Ellison Medical Foundation
  • Cure Alzheimer's Fund (P01NS074969)
  • Hope Center for Neurological Disorders (P30 NS057105)
  • National Institutes of Health (HL097800, NS057105)
  • National Institute on Aging (P50AG005681)
  • National Heart, Lung, and Blood Institute (HL 097800, R01HL097800)
  • National Institute of Neurological Disorders and Stroke (NS-056125, P30NS057105, R01NS078223, K08NS079405, R25NS065745, R01NS056125, P01NS074969)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
circadian clock proteins, Bmal1, clocks, NPAS2, Per1, Per2, redox homeostasis, oxidative stress, neurodegeneration, brain aging, astrocyte activation, synaptic degeneration, cortical functional connectivity, neuronal cell death, striatal degeneration
MeSH terms
Aging, Animals, Brain, Cerebral Cortex, Circadian Rhythm, Corpus Striatum, Gene Expression Regulation, Gliosis, Hippocampus, Homeostasis, Locomotion, Mice, Inbred C57BL, Mice, Neurologic Mutants, Nerve Degeneration, Nerve Tissue Proteins, Neuroglia, Neurons, Oxidation-Reduction, Mice, Knockout, Oxidative Stress, Sleep Disorders, Circadian Rhythm, RNA Interference, Basic Helix-Loop-Helix Transcription Factors, Basic Helix-Loop-Helix Proteins, CLOCK Proteins, ARNTL Transcription Factors, Period Circadian Proteins

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