The Role of Microglia in Perioperative Neuroinflammation and Neurocognitive Disorders.
Level 5 - mechanism / opinion, no new human data
Narrative review of preclinical mechanisms and therapeutic targets without human clinical data.
PubMed 34122048 · doi:10.3389/fnagi.2021.671499
What was done
This narrative review synthesizes preclinical and mechanistic literature on the role of microglia in neuroinflammation following peripheral surgical trauma. It outlines phenotypic transitions from anti-inflammatory to pro-inflammatory states and evaluates preclinical strategies to prevent microglial-mediated cognitive impairment, including microglial depletion and repopulation, p38 MAP kinase inhibition (e.g., minocycline), and selective inhibition of microglial potassium channels (Kv1.3 and KCa3.1).
What was found
The abstract reports no quantitative data or effect sizes. Preclinical findings described indicate that pro-inflammatory microglial phenotypes disrupt synaptic plasticity (such as long-term potentiation) leading to learning and memory deficits. Preclinical depletion and repopulation of microglia, p38 MAP kinase blockade, and selective inhibition of Kv1.3 and KCa3.1 channels suppress neuroinflammatory and oxidative pathways while improving memory and sensorimotor outcomes.
Why it matters
This review highlights the mechanistic link between peripheral surgery, microglial activation, and perioperative cognitive decline, pointing to selective microglial potassium channel blockers as potential therapeutic targets.
Limits
The abstract provides no quantitative data, sample sizes, or systematic search methodology. The evidence is derived from preclinical and mechanistic models, which may not directly translate to clinical efficacy or safety in human surgical populations.
Cited by
- supports Systemic inflammation causes microglia to polarize into a pro-inflammatory M1 phenotype that releases damaging cytokines, creating a feed-forward cycle that activates further microglia.