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. Author manuscript; available in PMC: 2019 Oct 1.
Published in final edited form as: Brain Behav Immun. 2018 Jul 17;73:133–148. doi: 10.1016/j.bbi.2018.07.012

Figure 4. Microglial priming is elicited by common mechanisms in aging and stress.

Figure 4.

Microglial priming can be caused by intense and/or prolonged glucocorticoid signaling, by excess release of damage-associated molecular patterns (DAMPs), by loss of neuron signaling (which typically helps maintain microglia homeostasis), and by circadian disruption. Aging and stress can elicit priming by any or all of these mechanisms.