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Circadian disruption promotes epileptic seizures via the Ruminococcus gnavus-arginine-NOX4-ferroptosis axis

In a pentylenetetrazol (PTZ) kindling rat model, circadian rhythm disruption (continuous light exposure) significantly shortened seizure latency and increased seizure frequency. This effect was mediated by increased Ruminococcus gnavus abundance, which suppressed arginine synthesis, activated NOX4, and induced ferroptosis in the hippocampus.

1 min read•Updated Jul 17, 2026•0 RCTs•View structured evidence →
Evidence Score24/100
Human RCT☆☆☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

This article is automatically generated from the structured evidence profile behind the claim above. Scores reflect the quality and quantity of available research, not clinical advice.

Circadian disruption promotes epileptic seizures via the Ruminococcus gnavus-arginine-NOX4-ferroptosis axis The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 24/100 (low).

The Claim

Circadian disruption promotes epileptic seizures via the Ruminococcus gnavus-arginine-NOX4-ferroptosis axis

This conclusion is most relevant to: Pentylenetetrazol (PTZ) kindling rat model.

What the Research Shows

The conclusion draws on 1 linked study. Highlights from the cited literature:

  • ▸Circadian disruption promotes epileptic seizures via the Ruminococcus gnavus-arginine-NOX4-ferroptosis axis. (Brain research bulletin, 2026) —

How It Works

The proposed biological pathway:

  • ▸Circadian disruption increases Ruminococcus gnavus abundance in gut microbiota
  • ▸R. gnavus suppresses ASS1 expression in kidney, reducing L-citrulline-to-L-arginine conversion
  • ▸Arginine deficiency upregulates NOX4 in hippocampus, causing oxidative stress (elevated MDA, reduced SOD)
  • ▸Oxidative stress induces ferroptosis (mitochondrial damage, ACSL4 up, GPX4 down), promoting seizures

Who Might Benefit

Evidence fit by population:

  • ▸Pentylenetetrazol (PTZ) kindling rat model

Limitations & Caveats

Important context when interpreting this evidence:

  • ▸Study conducted in a rat model, not directly translatable to humans
  • ▸Only one seizure induction method (PTZ kindling) was used, limiting generalizability to other epilepsy types

Frequently Asked Questions

What is the main finding of this study?▼

Circadian disruption worsens epileptic seizures through a gut-brain axis involving R. gnavus, arginine deficiency, NOX4 activation, and ferroptosis.

Can L-arginine supplementation help with seizures?▼

Yes, in this rat model, L-arginine supplementation prolonged seizure latency and reduced seizure frequency by reversing ferroptosis via downregulating NOX4-ACSL4 and upregulating GPX4.

What is the role of Ruminococcus gnavus in epilepsy?▼

R. gnavus enrichment from circadian disruption suppresses kidney ASS1, reducing arginine production, which triggers a cascade leading to hippocampal ferroptosis and increased seizure severity.

What therapeutic targets does this study suggest?▼

Potential targets include NOX4 (inhibited by GLX351322), L-arginine supplementation, and modulation of gut microbiota to reduce R. gnavus abundance.

References

  1. 1.Yu F, He J, Chen Y, Zhu Y. “Circadian disruption promotes epileptic seizures via the Ruminococcus gnavus-arginine-NOX4-ferroptosis axis..” Brain research bulletin, 2026. PMID: 42437603 DOI: 10.1016/j.brainresbull.2026.112037
Disclaimer: This article is auto-generated from structured research data 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.