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Sleep disturbance is consistently associated with elevated C-reactive protein and interleukin-6 in insomnia disorder

The abstract reports that sleep disturbance in insomnia disorder is more consistently associated with selected inflammatory markers, particularly C-reactive protein (CRP) and interleukin-6 (IL-6), while findings for tumor necrosis factor-alpha (TNF-α) remain less consistent. This suggests a link between insomnia and low-grade inflammation, which may contribute to the chronicity and multisystem associations of the disorder.

Last updated: Aug 12, 2026•0 RCTs•📖 Read as article →

Evidence Score

Evidence Score32/100
Human RCT☆☆☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

Study Evidence

Study 1. Circadian-immune crosstalk in insomnia disorder: mechanisms and therapeutic implications.

observational

Huang Y, Wang X, Chen X, Liu Y · Frontiers in neuroscience (2026)

Participants: N/A
Duration: N/A
Intervention: N/A (observational associations reported)
Outcome: Inflammatory markers: C-reactive protein (CRP), interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-α)
Effect Size: N/A
Population: Individuals with insomnia disorder (ID)

Result:

PubMed: 42523963DOI: 10.3389/fnins.2026.1881195

Mechanism Graph

Circadian rhythm disruption and impaired melatonin signaling occur in insomnia disorder
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HPA-axis activation and autonomic imbalance lead to stress-related neuroendocrine responses
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Disruption of circadian-immune crosstalk alters inflammatory rhythmicity and increases CRP and IL-6 levels
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Result: Persistent low-grade inflammation contributes to insomnia symptom maintenance and chronicity

Limitations

  • ⚠The abstract does not provide specific effect sizes or quantitative data from individual studies
  • ⚠Associations are based on available evidence but causal direction cannot be determined from this review alone
  • ⚠Findings for TNF-α are inconsistent, indicating heterogeneity in immune-inflammatory responses across studies

Frequently Asked Questions

Which inflammatory markers are most consistently linked to insomnia disorder?▼

C-reactive protein (CRP) and interleukin-6 (IL-6) show consistent associations with sleep disturbance in insomnia disorder, while tumor necrosis factor-alpha (TNF-α) findings are less consistent.

Does insomnia cause inflammation or does inflammation cause insomnia?▼

The abstract suggests a bidirectional relationship through circadian-immune crosstalk, but does not establish causality. Circadian disruption and hyperarousal may drive inflammation, which in turn perpetuates insomnia symptoms.

What interventions are discussed for targeting circadian-immune dysfunction in insomnia?▼

Potential strategies include light management, melatonin and melatonin receptor agonists, cognitive behavioral therapy for insomnia (CBT-I), physical activity, time-restricted eating, and stress management.

Is this review based on human or animal studies?▼

The abstract does not specify study types, but it reviews evidence from human insomnia disorder research, likely including observational and interventional studies.

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References

  1. 1.Huang Y, Wang X, Chen X, Liu Y. "Circadian-immune crosstalk in insomnia disorder: mechanisms and therapeutic implications.." Frontiers in neuroscience, 2026. PMID: 42523963 DOI: 10.3389/fnins.2026.1881195
Disclaimer: This content is for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.