Cited by 15Mitochondrial Function and PathologyNeuroinflammation and Neurodegeneration MechanismsNeuroscience and Neuropharmacology Research

Young Astrocytic Mitochondria Attenuate the Elevated Level of CCL11 in the Aged Mice, Contributing to Cognitive Function Improvement

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Tashiro, Ryosuke, Ozaki, Dan, Bautista-Garrido, Jesus, Sun, Guanghua, Obertas, Lidiya, Mobley, Alexis S., Kim, Gab Seok, Aronowski, Jaroslaw +1 more·2023·International Journal of Molecular Sciences

Abstract

Aging drives cognitive decline, and mitochondrial dysfunction is a hallmark of age-induced neurodegeneration. Recently, we demonstrated that astrocytes secrete functional mitochondria (Mt), which help adjacent cells to resist damage and promote repair after neurological injuries. However, the relationship between age-dependent changes in astrocytic Mt function and cognitive decline remains poorly understood. Here, we established that aged astrocytes secret less functional Mt compared to young astrocytes. We found the aging factor C-C motif chemokine 11 (CCL11) is elevated in the hippocampus of aged mice, and that its level is reduced upon systemic administration of young Mt, in vivo. Aged mice receiving young Mt, but not aged Mt improved cognitive function and hippocampal integrity. Using a CCL11-induced aging-like model in vitro, we found that astrocytic Mt protect hippocampal neurons and enhance a regenerative environment through upregulating synaptogenesis-related gene expression and anti-oxidants that were suppressed by CCL11. Moreover, the inhibition of CCL11-specific receptor C-C chemokine receptor 3 (CCR3) boosted the expression of synaptogenesis-related genes in the cultured hippocampal neurons and restored the neurite outgrowth. This study suggests that young astrocytic Mt can preserve cognitive function in the CCL11-mediated aging brain by promoting neuronal survival and neuroplasticity in the hippocampus.

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Authors
Tashiro, R., Ozaki, D., Bautista-Garrido, J., Sun, G., Obertas, L., Mobley, A. S., Kim, G. S., Aronowski, J., & Jung, J. E.
Affiliations
The University of Texas Health Science Center at Houston (US)
Corresponding author
Jung, Joo Eun
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2023-03-08
Volume
24
Issue
6
Pages
5187
ISSN
1422-0067 (ISSN-L)
OpenAlex
W4323665354
Cited by
15
References
89
Citations by year
2026: 5 · 2025: 7 · 2024: 1 · 2023: 2
FWCI
1.33
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Digital Commons-TMC (Texas Medical Center) (submittedVersion)
Funders
UTHealth
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
mitochondrial transfer, eotaxin, CCR3, aging, cognitive decline, hippocampus, synaptogenesis, neuroplasticity, neuronal survival, mitochondrial dysfunction, aged mice, neurite outgrowth
MeSH terms
Animals, Astrocytes, Brain, Cognition, Hippocampus, Mitochondria, Neurons, Mice, Chemokine CCL11

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