Role of the kynurenine pathway and the endocannabinoid system as modulators of inflammation and personality traits

PSYCHONEUROENDOCRINOLOGY

卷:110

Article

Heilman, Patrick¹  Hill, Matthew N.^2,3  Coussons-Read, Mary⁴  Brundin, Lena^1,5  Coccaro, Emil F.⁶ 

[1] Van Andel Res Inst, Ctr Neurodegenerat Sci, Grand Rapids, MI USA

[2] Univ Calgary, Hotchkiss Brain Inst, Calgary, AB, Canada

[3] Univ Calgary, Mathison Ctr Mental Hlth Res & Educ, Calgary, AB, Canada

[4] Univ Denver, Dept Psychol, Colorado Springs, CO USA

[5] Michigan State Univ, Coll Human Med, Div Psychiat & Behav Med, E Lansing, MI 48824 USA

[6] Univ Chicago, Pritzker Sch Med, Dept Psychiat & Behav Neurosci, Clin Neurosci Res Unit, Chicago, IL 60637 USA

关键词: Interleukin-6;    Picolinic acid;    2-Arachidonoylglycerol;    Neuroticism;    Reward dependence;   

DOI  :  10.1016/j.psyneuen.2019.104434

来源: Elsevier

【 摘 要 】

Background: Kynurenine pathway metabolites and endocannabinoids both exert potent regulatory effects on the immune system, but the relationship between these molecules is unknown. The role of these immunobiological mediators in emotionality and personality traits is not previously characterized. Methods: Interleukin-6 (IL-6), 2-arachidonoylglycerol (2-AG) and picolinic acid (PIC) were measured in the plasma of physically healthy individuals who had history of mood, anxiety, and personality disorders (n = 96) or who had no history of any psychiatric disorder (n = 56) by DSM-5 Criteria. Dimensional assessments of personality were performed using the Eysenck Personality Questionnaire (EPQ) and the Tridimensional Personality Questionnaire (TPQ). Results: Plasma IL-6 levels were significantly associated with plasma 2-AG levels and plasma PIC levels across all subjects. PIC levels were also negatively associated with 2-AG levels across all subjects, independent of IL-6 levels. In our analysis of the biological determinants of personality factors, we identified significant associations between IL-6 and novelty seeking assessment, and between PIC and neuroticism assessment. Conclusions: These data provide evidence of a biological link between metabolites of the kynurenine pathway, the endocannabinoid system and IL-6 and suggest that these factors may influence personality traits.

【 授权许可】

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