Related Experiment Video
Updated: Jun 6, 2026
Culturing Microglia from the Neonatal and Adult Central Nervous System
Published on: August 9, 2013
Can consuming flavonoids restore old microglia to their youthful state?
Saebyeol Jang1, Rodney W Johnson
1Integrative Immunology and Behavior Program, Division of Nutritional Sciences, Urbana, Illinois, USA.
Abstract:
Microglial cells, which are resident macrophages in the central nervous system, are "primed" in the aged brain and are hypersensitive to messages emerging from immune-to-brain signaling pathways. Thus, in elderly individuals who have an infection, microglia overreact to signals from the peripheral immune system and produce excessive levels of cytokines, causing behavioral pathology including serious deficits in cognition. Importantly, recent studies indicate dietary flavonoids have anti-inflammatory properties and are capable of mitigating microglial cells in the brains of aged mice. Thus, dietary or supplemental flavonoids and other bioactive agents have the potential to restore the population of microglial cells in the elderly brain to its youthful state. This review briefly describes the immune-to-brain signaling pathways, consequences of microglial cell priming, and the potential of flavonoids to mitigate brain microglia and cognitive deficits induced by inflammatory cytokines.
Insights
Aging primes brain microglia, leading to overactive immune responses and cognitive decline. Dietary flavonoids may mitigate this inflammation, potentially restoring youthful microglial function and improving cognition in the elderly.
Area of Science:
- Neuroimmunology
- Aging Research
- Nutritional Neuroscience
Background:
- Microglial cells, the brain's resident macrophages, become "primed" in aged individuals.
- This priming leads to hypersensitivity to immune signals and excessive cytokine production during infections.
- This overreaction can cause behavioral pathology and significant cognitive deficits in the elderly.
Purpose of the Study:
- To review immune-to-brain signaling pathways.
- To describe the consequences of microglial cell priming in aging.
- To explore the potential of dietary flavonoids in mitigating age-related microglial dysfunction and cognitive decline.
Main Methods:
- Review of current scientific literature on microglial biology, aging, and neuroinflammation.
- Analysis of studies investigating the effects of dietary flavonoids on microglial cells.
- Examination of immune-to-brain signaling mechanisms.
Main Results:
- Aged microglia exhibit heightened reactivity to peripheral immune stimuli.
- This heightened reactivity contributes to cytokine-induced cognitive impairments.
- Dietary flavonoids demonstrate anti-inflammatory properties and the ability to modulate microglial activity in aged models.
Conclusions:
- Dietary flavonoids show promise in mitigating age-related microglial priming and associated cognitive deficits.
- Flavonoids may help restore microglial function to a more youthful state.
- Further research into flavonoids and other bioactive agents could lead to interventions for cognitive health in aging.
