Cited by 364Neurogenesis and neuroplasticity mechanismsNeuroinflammation and Neurodegeneration MechanismsNeurological Disease Mechanisms and Treatments

Fractalkine and CX3CR1 regulate hippocampal neurogenesis in adult and aged rats

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Bachstetter, Adam D., Morganti, Josh M., Jernberg, Jennifer, Schlunk, Andrea, Mitchell, Staten H., Brewster, Kaelin W., Hudson, Charles E., Cole, Michael J. +3 more·2011·Neurobiology of Aging

Abstract

Microglia have neuroprotective capacities, yet chronic activation can promote neurotoxic inflammation. Neuronal fractalkine (FKN), acting on CX(3)CR1, has been shown to suppress excessive microglia activation. We found that disruption in FKN/CX(3)CR1 signaling in young adult rodents decreased survival and proliferation of neural progenitor cells through IL-1β. Aged rats were found to have decreased levels of hippocampal FKN protein; moreover, interruption of CX(3)CR1 function in these animals did not affect neurogenesis. The age-related loss of FKN could be restored by exogenous FKN reversing the age-related decrease in hippocampal neurogenesis. There were no measureable changes in young animals by the addition of exogenous FKN. The results suggest that FKN/CX(3)CR1 signaling has a regulatory role in modulating hippocampal neurogenesis via mechanisms that involve indirect modification of the niche environment. As elevated neuroinflammation is associated with many age-related neurodegenerative diseases, enhancing FKN/CX(3)CR1 interactions could provide an alternative therapeutic approach to slow age-related neurodegeneration.

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  • Genetic disruption of Cx3cr1 decreases the number of new neurons, supporting the importance of microglia-neuron communication in regulating adult neurogenesis.

    “Genetic disruption of Cx3cr1 decreases the number of new neurons (Bachstetter et al., 2011) supporting the importance of microglia-neuron communication in regulating adult neurogenesis.”

    From Adult neurogenesis, glia, and the extracellular matrix (2019) · cites this paper as Bachstetter et al., 2011

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Authors
Bachstetter, A. D., Morganti, J. M., Jernberg, J., Schlunk, A., Mitchell, S. H., Brewster, K. W., Hudson, C. E., Cole, M. J., Harrison, J. K., Bickford, P. C., & Gemma, C.
Affiliations
  • University of South Florida (US)
  • James A. Haley Veterans' Hospital (US)
  • University of Florida (US)
Corresponding author
Gemma, Carmelina
Venue
Neurobiology of Aging
Publisher
Elsevier BV
Published
2011-11
Volume
32
Issue
11
Pages
2030-2044
ISSN
0197-4580 (ISSN-L)
OpenAlex
W2145384905
Cited by
364
References
46
Citations by year
2026: 13 · 2025: 16 · 2024: 16 · 2023: 15 · 2022: 25 · 2021: 22 · 2020: 28 · 2019: 32 · 2018: 22 · 2017: 31 · 2016: 32 · 2015: 16 · 2014: 34 · 2013: 21 · 2012: 22
FWCI
4.18
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Aging (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Amgen
  • U.S. Forest Service
  • National Institute on Aging (R21AG024165, P01AG004418, AG024165A, AG004418)
  • National Institute of Allergy and Infectious Diseases (AI058256, R01AI058256)
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
fractalkine, CX3CR1, hippocampal neurogenesis, microglial activation, neuroinflammation, neural progenitor cells, IL-1β, aging, age-related neurodegeneration
MeSH terms
CX3C Chemokine Receptor 1, Age Factors, Aging, Animals, Hippocampus, Neurons, Signal Transduction, Microglia, Receptors, Chemokine, Rats, Interleukin-1beta, Chemokine CX3CL1, Neurogenesis

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