Genetics of Neuroinflammation
Neuroinflammation involves activation of microglia and astrocytes within the central nervous system, driving brain inflammation. It is a proposed mechanism underlying brain fog, cognitive impairment, and neurological symptoms in Long COVID and ME/CFS.
This page is for educational and informational purposes only. Not a diagnostic tool. Always consult a qualified healthcare provider.
What is Neuroinflammation?
The central nervous system (CNS) was traditionally considered immunologically privileged, but microglia — the brain's resident immune cells — actively survey for and respond to inflammatory signals. Neuroinflammation can be triggered by systemic inflammation breaching the blood-brain barrier, direct viral CNS invasion, or activation of microglial pattern recognition receptors. In Long COVID, PET imaging studies have documented microglial activation in patients with cognitive symptoms. Genetic variants in microglial activation pathways, blood-brain barrier integrity genes, and CNS inflammatory mediators may influence susceptibility to neuroinflammation.
Biological pathways commonly discussed in relation to Neuroinflammation
Research into Neuroinflammation and Central Nervous System Inflammation has highlighted several biological pathways that may be relevant. Genetic variants within these pathways may influence individual susceptibility, symptom severity, or the trajectory of the condition.
Microglial Activation
Microglia are the CNS's innate immune cells. Variants in microglial activation genes (TREM2, CX3CR1, P2RY12) may alter microglial sensitivity and neuroinflammatory responses.
Blood Brain Barrier
The blood-brain barrier restricts immune cell and inflammatory mediator entry into the CNS. Variants in tight junction proteins (OCLN, CLDN5) and endothelial signalling genes may affect BBB permeability under inflammatory conditions.
Cns Cytokines
Cytokines including IL-6, TNF, IL-1beta, and IFN-gamma can drive neuroinflammation when produced within or entering the CNS. Variants affecting their production or receptor signalling may influence neuroinflammatory severity.
Complement In Cns
The complement system is expressed in the brain and plays roles in synaptic pruning and neuroinflammation. Excessive complement activation (e.g. via C1q, C3) may contribute to synaptic damage and cognitive dysfunction.
Key genes studied in relation to Neuroinflammation
The following genes have been studied in relation to Neuroinflammation and Central Nervous System Inflammation. These genes span the biological pathways most commonly discussed in this area of research.
21 genes total studied in relation to Neuroinflammation across the ChronicDNA dataset.
Genetic variants commonly discussed
The following genetic variants (SNPs) are found in genes that have been studied in relation to Neuroinflammation. Each variant represents a position in the genome where individuals may carry different alleles.
41 variants total across genes studied in relation to Neuroinflammation.
How personal DNA data may provide educational insights
Consumer DNA files from 23andMe, AncestryDNA, and MyHeritage contain raw SNP data. When you upload your file to ChronicDNA, the analysis engine checks your genotype against a curated panel of 80+ genes selected for their relevance to Long COVID, ME/CFS, and connected biological pathways - some of which may relate to areas such as Neuroinflammation.
This is not a diagnostic service. Genetic variants do not determine whether you have Neuroinflammation, nor do they predict your clinical outcomes. The report is educational - it explains which variants you carry, what the research says about them, and how they fit into the biological pathways most relevant to chronic illness. All results should be discussed with a qualified healthcare provider.
Related conditions and pathways
Neuroinflammation shares biological pathways and genetic associations with the following related conditions and areas of research.
Frequently asked questions
What is neuroinflammation?
Neuroinflammation refers to inflammatory processes within the central nervous system, primarily involving activation of microglia (the brain's immune cells) and astrocytes. It can impair neuronal function, alter neurotransmitter systems, and contribute to cognitive symptoms.
Has neuroinflammation been detected in Long COVID?
Yes — PET imaging studies have documented microglial activation in Long COVID patients with cognitive symptoms, providing direct evidence of neuroinflammation. The mechanisms driving this activation are still being investigated.
Which genes are studied in relation to neuroinflammation?
Key genes include CX3CR1 (fractalkine receptor on microglia), TREM2, IL6, TNF, BDNF, C1Q genes, and blood-brain barrier integrity genes (OCLN). These cover microglial biology, CNS cytokine signalling, and barrier function.
How does neuroinflammation relate to brain fog?
Microglial activation and neuroinflammatory cytokines can impair synaptic function, alter neurotransmitter availability, and disrupt neural circuit activity — collectively manifesting as cognitive slowing, memory difficulties, and mental fatigue characteristic of brain fog.
Explore DNA insights
If you already have DNA data from 23andMe, AncestryDNA, or MyHeritage, upload your raw file to ChronicDNA and receive a personalised educational report covering genes studied in relation to Neuroinflammation and connected biological pathways.
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21 genes · 41 variants analysed in relation to Neuroinflammation