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Post-COVID major depression is not associated with peripheral inflammation

Giulia Boschi1, Romain Colle1, Nicolas Noel2

  • 1Service Hospitalo-Universitaire de Psychiatrie de Bicêtre, Mood Center Paris Saclay, Assistance Publique-Hôpitaux de Paris, Hôpitaux Universitaires Paris-Saclay, Hôpital de Bicêtre, Le Kremlin Bicêtre, F-94275, France; MOODS Team, INSERM 1018, CESP (Centre de Recherche en Epidémiologie et Santé des Populations), Université Paris-Saclay, Faculté de Médecine Paris-Saclay, Le Kremlin Bicêtre, F-94275, France.

Journal of Psychiatric Research
|February 15, 2025
PubMed

Insights

This study found no link between 10 blood inflammation markers and major depressive disorder (MDD) in patients 4 months post-COVID-19. Further research is needed to understand the causes of post-COVID depression.

Area of Science:

  • * Neuroscience
  • * Immunology
  • * Psychiatry

Background:

  • * Post-COVID-19 major depressive disorder (MDD) is common, but its underlying physiological mechanisms are not well understood.
  • * Inflammation is a potential factor in the development of depression following viral infections.

Purpose of the Study:

  • * To investigate the association between 10 blood inflammatory markers and MDD in patients 4 months after acute COVID-19 infection.
  • * To compare inflammatory profiles in patients with and without post-COVID MDD.

Main Methods:

  • * Cross-sectional study of the COMEBAC cohort, including 177 patients hospitalized for COVID-19.
  • * Assessment of MDD via structured psychiatric interviews and self-questionnaires.
  • * Measurement of 10 peripheral inflammatory markers: C-reactive protein, leukocyte counts, neutrophil-to-lymphocyte ratio, systemic inflammatory index, cortisol, ferritin, and hemoglobin levels.

Main Results:

  • * 13.6% of patients (24 out of 177) were diagnosed with MDD 4 months post-COVID-19.
  • * No significant differences in the 10 measured peripheral inflammatory markers were found between patients with post-COVID MDD and controls.
  • * Peripheral inflammatory markers did not correlate with the severity of depressive symptoms.

Conclusions:

  • * The study found no association between post-COVID MDD and the examined peripheral inflammatory markers 4 months after infection.
  • * These findings suggest that inflammation may not be the primary driver of MDD in this context.
  • * Further research is required to explore alternative physiological or psychological mechanisms contributing to post-COVID MDD.
Abstract

Keywords:
COVID-19DepressionInflammation

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