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

•IL-6, 2-AG, and KP metabolites in people with/without mood, anxiety, and personality disorder were correlated with measures of personality.•IL-6 levels were significantly associated with plasma 2-AG levels and plasma picolinic acid levels which correlated inversely with 2-AG levels across all subje...

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Published inPsychoneuroendocrinology Vol. 110; p. 104434
Main Authors Heilman, Patrick, Hill, Matthew N., Coussons-Read, Mary, Brundin, Lena, Coccaro, Emil F.
Format Journal Article
LanguageEnglish
Published England Elsevier Ltd 01.12.2019
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ISSN0306-4530
1873-3360
1873-3360
DOI10.1016/j.psyneuen.2019.104434

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Abstract •IL-6, 2-AG, and KP metabolites in people with/without mood, anxiety, and personality disorder were correlated with measures of personality.•IL-6 levels were significantly associated with plasma 2-AG levels and plasma picolinic acid levels which correlated inversely with 2-AG levels across all subjects, independent of IL-6.•We also identified associations between IL-6 and novelty seeking, and between PIC and neuroticism.•These data provide evidence of a link between IL-6, endocannabinoids, and KP metabolites and suggest that these factors influence personality traits. 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. 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). 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. 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.
AbstractList 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.BACKGROUNDKynurenine 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.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).METHODSInterleukin-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).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.RESULTSPlasma 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.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.CONCLUSIONSThese 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.
•IL-6, 2-AG, and KP metabolites in people with/without mood, anxiety, and personality disorder were correlated with measures of personality.•IL-6 levels were significantly associated with plasma 2-AG levels and plasma picolinic acid levels which correlated inversely with 2-AG levels across all subjects, independent of IL-6.•We also identified associations between IL-6 and novelty seeking, and between PIC and neuroticism.•These data provide evidence of a link between IL-6, endocannabinoids, and KP metabolites and suggest that these factors influence personality traits. 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. 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). 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. 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.
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. 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). 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. 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.
ArticleNumber 104434
Author Brundin, Lena
Coussons-Read, Mary
Heilman, Patrick
Hill, Matthew N.
Coccaro, Emil F.
AuthorAffiliation Hotchkiss Brain Institute and Mathison Centre for Mental Health Research and Education, University of Calgary, Calgary, AB Canada
Department of Psychology, University of Denver at Colorado Springs, Colorado Springs, CO
Center for Neurodegenerative Science, Van Andel Research Institute, Grand Rapids, Michigan
Division of Psychiatry and Behavioral Medicine, College of Human Medicine, Michigan State University
Clinical Neuroscience Research Unit, Department of Psychiatry and Behavioral Neuroscience, Pritzker School of Medicine, University of Chicago, Chicago, IL
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Keywords Neuroticism
Reward dependence
Picolinic acid
2-Arachidonoylglycerol
Interleukin-6
Language English
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Snippet •IL-6, 2-AG, and KP metabolites in people with/without mood, anxiety, and personality disorder were correlated with measures of personality.•IL-6 levels were...
Kynurenine pathway metabolites and endocannabinoids both exert potent regulatory effects on the immune system, but the relationship between these molecules is...
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StartPage 104434
SubjectTerms 2-Arachidonoylglycerol
Adult
Anxiety Disorders - blood
Anxiety Disorders - epidemiology
Anxiety Disorders - etiology
Arachidonic Acids - blood
Cohort Studies
Endocannabinoids - blood
Endocannabinoids - metabolism
Endocannabinoids - physiology
Female
Glycerides - blood
Humans
Inflammation - epidemiology
Inflammation - etiology
Inflammation - metabolism
Interleukin-6
Interleukin-6 - blood
Kynurenine - metabolism
Kynurenine - physiology
Male
Middle Aged
Neuroticism
Personality - physiology
Personality Disorders - blood
Personality Disorders - epidemiology
Personality Disorders - etiology
Picolinic acid
Picolinic Acids - blood
Receptors, Cannabinoid - metabolism
Receptors, Cannabinoid - physiology
Reward dependence
Signal Transduction - physiology
Title Role of the kynurenine pathway and the endocannabinoid system as modulators of inflammation and personality traits
URI https://www.clinicalkey.com/#!/content/1-s2.0-S0306453019310182
https://dx.doi.org/10.1016/j.psyneuen.2019.104434
https://www.ncbi.nlm.nih.gov/pubmed/31525567
https://www.proquest.com/docview/2292087705
https://pubmed.ncbi.nlm.nih.gov/PMC10262304
Volume 110
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