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Related Concept Videos

Depressive Disorders: MDD and Dysthymia01:27

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Depressive disorders are a group of mental health conditions characterized by pervasive feelings of sadness, diminished pleasure in life, and a significant impact on daily functioning. These conditions are most prevalent in individuals during their 30s and affect women at twice the rate of men. Contrary to popular belief, younger individuals are generally more susceptible to these disorders than older adults. Two key types of depressive disorders include Major Depressive Disorder (MDD) and...
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Depressive disorders result from a complex interplay of biological, psychological, and sociocultural factors, each contributing uniquely to the development and persistence of the condition. Understanding these factors provides critical insight into the multifaceted nature of depression.
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Panic disorder is an anxiety disorder characterized by recurrent and sudden minutes-long episodes of intense fear, known as panic attacks. These attacks may feel like heart attacks and often happen without warning or a specific cause. They can include symptoms such as rapid heart rate, shortness of breath, chest pain, trembling, sweating, dizziness, and a sense of helplessness. During a panic attack, individuals may feel as though they are experiencing a heart attack or are in a...
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Peptic Ulcer Disease (PUD) is characterized by mucosal excavation in the esophagus, stomach, pylorus, or duodenum. It can manifest as acute or chronic based on the extent and duration of mucosal involvement.
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Related Experiment Video

Updated: Jun 17, 2025

An Unpredictable Chronic Mild Stress Protocol for Instigating Depressive Symptoms, Behavioral Changes and Negative Health Outcomes in Rodents
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Causality between major depressive disorder and functional dyspepsia: a two-sample Mendelian randomization study.

Yaming Du1, Rui Wang2,3, Xinzi Xu1

  • 1Clinical College of Chinese Medicine, Hubei University of Chinese Medicine, Wuhan City, China.

Frontiers in Neurology
|August 6, 2024
PubMed
Summary

Major depression significantly increases the risk of developing functional dyspepsia. This genetic study confirms a causal link, highlighting the importance of mental health in digestive well-being.

Keywords:
Mendelian randomizationcausal relationshipdisease riskfunctional dyspepsiamajor depressive disorder

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Area of Science:

  • Psychiatry and Gastroenterology
  • Genetic Epidemiology
  • Complex Disease Etiology

Background:

  • Functional dyspepsia (FD) is a prevalent gastrointestinal disorder.
  • The etiological link between major depression and FD remains unclear.
  • Investigating shared genetic factors may elucidate their relationship.

Purpose of the Study:

  • To determine the causal relationship between major depression and functional dyspepsia.
  • Utilize two-sample Mendelian randomization to assess genetic predisposition.
  • Provide insights into the underlying pathophysiology connecting these conditions.

Main Methods:

  • Employed two-sample Mendelian randomization (MR) analysis.
  • Utilized genome-wide association study (GWAS) data for major depression and FD.
  • Applied Inverse-Variance Weighted (IVW), MR-Egger, and Weighted Median Estimator (WME) methods with sensitivity analyses.

Main Results:

  • Identified 31 Single Nucleotide Polymorphisms (SNPs) as instrumental variables for major depression.
  • MR analysis revealed a significant positive causal effect of major depression on functional dyspepsia (OR = 1.389).
  • Sensitivity analyses confirmed the robustness of findings, with no significant heterogeneity or pleiotropy detected.

Conclusions:

  • Major depressive disorder is causally associated with an increased risk of functional dyspepsia.
  • Genetic evidence supports a shared underlying mechanism or predisposition.
  • Findings underscore the importance of addressing mental health in managing FD.