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Related Concept Videos

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In clinical practice, the direct measurement of hepatic blood flow to evaluate liver function presents significant challenges due to the intricate and specialized nature of the necessary techniques. Consequently, healthcare professionals often rely on empirical estimates derived from thorough patient examinations and liver function tests to gauge liver health. Among the tools at their disposal, the Child–Pugh and MELD scoring systems stand out for their ability to categorize and assess...
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Chronic liver disease significantly impacts drug metabolism due to alterations in hepatic blood flow and enzyme accessibility. This disruption affects the body's pharmacokinetics—the movement and processing of drugs within the system. Key enzymes crucial for metabolizing medications become less accessible, changing how drugs are processed and utilized. Furthermore, liver disease influences the synthesis of plasma proteins, such as albumin and globulins, which play critical roles in drug...
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Related Experiment Video

Updated: Jan 15, 2026

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache
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Bidirectional causality between liver dysfunction and migraine: A mediating Mendelian randomization study.

Su Yi1, Huirong He2, Lihua Hang1,2

  • 1Department of Anesthesiology, Kunshan Hospital Affiliated to Jiangsu University, Suzhou, China.

Medicine
|October 15, 2025
PubMed
Summary

Elevated bilirubin and aspartate aminotransferase (AST) are genetically linked to increased migraine risk. These liver function markers impact migraine through brain structure and liver metabolism, highlighting the liver-brain axis.

Keywords:
aspartate aminotransferasebilirubinliver dysfunctionmediationmendelian randomizationmigraine

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Area of Science:

  • Neurology
  • Hepatology
  • Genetics
  • Metabolomics

Background:

  • Migraine is a disabling neurological disorder with potential links to hepatic metabolism.
  • Observational studies suggest associations between bilirubin, aspartate aminotransferase (AST), and migraine risk, but causality remains unclear.
  • Confounding factors necessitate rigorous investigation into the causal relationship between liver function markers and migraine.

Purpose of the Study:

  • To investigate the causal effect of genetically predicted serum bilirubin and AST levels on migraine risk.
  • To explore potential mediating pathways of these effects through brain structural or hepatic biomarkers.
  • To elucidate the role of the liver-brain axis in migraine pathophysiology.

Main Methods:

  • Two-sample Mendelian randomization (MR) framework utilizing data from the IEU OpenGWAS Project.
  • Inverse-variance weighting (IVW) as the primary analytical method, supported by MR-Egger and weighted median methods.
  • Pleiotropy, heterogeneity, and leave-one-out analyses were conducted to ensure robustness and validity.

Main Results:

  • Genetically predicted elevated bilirubin significantly increased migraine risk (OR=1.055, P=0.003), with 32% mediation via cortical thickness.
  • Genetically predicted elevated AST also increased migraine risk (OR=1.100, P=0.007), with 12% mediation by gamma-glutamyl transferase (GGT).
  • Direct effects of bilirubin and AST on migraine risk were substantial (68% and 88%, respectively).

Conclusions:

  • Serum bilirubin and AST act as genetic risk factors for migraine.
  • The causal effects are partially mediated by brain structural changes (bilirubin) and hepatic metabolic pathways (AST-GGT).
  • Clinical monitoring of migraine risk in individuals with liver dysfunction is recommended, alongside research into liver-brain axis interventions.