Leaky gut biomarkers in depression and suicidal behavior

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Abstract

Objective: Inflammation is associated with major depressive disorder (MDD) and suicidal behavior. According to the ‘leaky gut hypothesis’, increased intestinal permeability may contribute to this relationship via bacterial translocation across enterocytes. We measured plasma levels of gut permeability markers, in patients with a recent suicide attempt (rSA), MDD subjects with no history of a suicide attempt (nsMDD), and healthy controls (HC), and related these markers to symptom severity and inflammation. Method: We enrolled rSA (n = 54), nsMDD (n = 13), and HC (n = 17). Zonulin, intestinal fatty acid binding protein (I-FABP), soluble CD14, and interleukin-6 (IL-6) were quantified in plasma. Montgomery–Åsberg Depression Rating Scale (MADRS) and Suicide Assessment Scale (SUAS) were used for symptom assessments. Results: The rSA group displayed higher I-FABP and lower zonulin levels compared with both the nsMDD and the HC groups (all P < 0.001). IL-6 correlated positively with I-FABP (r = 0.24, P < 0.05) and negatively with zonulin (r = −0.25, P < 0.05). In all subjects, I-FABP levels correlated positively with MADRS (r = 0.25, P < 0.05) and SUAS scores (r = 0.38, P < 0.001), and the latter correlation was significant also in the nsMDD group (r = 0.60, P < 0.05). Conclusion: The ‘leaky gut hypothesis’ may improve our understanding of the link between inflammation and suicidal behavior. These findings should be considered preliminary until replicated in larger cohorts.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Malmö University
  • Van Andel Research Institute
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Psykiatri

Nyckelord

Originalspråkengelska
Sidor (från-till)185-193
TidskriftActa Psychiatrica Scandinavica
Volym139
Utgivningsnummer2
Tidigt onlinedatum2018 okt 22
StatusPublished - 2019
PublikationskategoriForskning
Peer review utfördJa