Omega-3 Polyunsaturated Fatty Acids and Blood-Brain Barrier Integrity in Major Depressive Disorder: Restoring Balance for Neuroinflammation and Neuroprotection

Yale J Biol Med. 2024 Sep 30;97(3):349-363. doi: 10.59249/YZLQ4631. eCollection 2024 Sep.

Abstract

Major depressive disorder (MDD), affecting over 264 million individuals globally, is associated with immune system dysregulation and chronic neuroinflammation, potentially linked to neurodegenerative processes. This review examines blood-brain barrier (BBB) dysfunction in MDD, focusing on key regulators like matrix metalloproteinase 9 (MMP9), aquaporin-4 (AQP4), and ATP-binding cassette subfamily B member 1 (ABCB1). We explore potential mechanisms by which compromised BBB integrity in MDD may contribute to neuroinflammation and discuss the therapeutic potential of omega-3 polyunsaturated fatty acids (n-3 PUFAs). n-3 PUFAs have demonstrated anti-inflammatory and neuroprotective effects, and potential ability to modulate MMP9, AQP4, and ABCB1, thereby restoring BBB integrity in MDD. This review aims to elucidate these potential mechanisms and evaluate the evidence for n-3 PUFAs as a strategy to mitigate BBB dysfunction and neuroinflammation in MDD.

Keywords: Aquaporin-4; blood-brain barrier; inflammation; major depressive disorder; metalloproteinase-9; omega-3 polyunsaturated fatty acids.

Publication types

  • Review

MeSH terms

  • Animals
  • Blood-Brain Barrier* / drug effects
  • Blood-Brain Barrier* / metabolism
  • Depressive Disorder, Major* / drug therapy
  • Depressive Disorder, Major* / metabolism
  • Fatty Acids, Omega-3* / metabolism
  • Fatty Acids, Omega-3* / pharmacology
  • Humans
  • Inflammation / drug therapy
  • Inflammation / metabolism
  • Neuroinflammatory Diseases* / drug therapy
  • Neuroinflammatory Diseases* / metabolism
  • Neuroprotection

Substances

  • Fatty Acids, Omega-3