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The Kynurenine pathway in pancreatic carcinoma

Published online by Cambridge University Press:  23 March 2020

C. Blesl ,
A. Tmava ,
A. Baranyi ,
A. Meinitzer ,
A. Painold ,
A. Holl ,
V. Stadlbauer-Köllner ,
H.P. Kapfhammer  and
S. Mörkl
C. Blesl
Affiliation:
Medical university of Graz, psychiatry, Graz, Austria
A. Tmava
Affiliation:
Medical university of Graz, psychiatry, Graz, Austria
A. Baranyi
Affiliation:
Medical university of Graz, psychiatry, Graz, Austria
A. Meinitzer
Affiliation:
Medical university of Graz, clinical institute of medical and chemical laboratory diagnostics, Graz, Austria
A. Painold
Affiliation:
Medical university of Graz, psychiatry, Graz, Austria
A. Holl
Affiliation:
Medical university of Graz, psychiatry, Graz, Austria
V. Stadlbauer-Köllner
Affiliation:
Medical university of Graz, gastroenterology and hepatology, Graz, Austria
H.P. Kapfhammer
Affiliation:
Medical university of Graz, psychiatry, Graz, Austria
S. Mörkl
Affiliation:
Medical university of Graz, psychiatry, Graz, Austria

Abstract

Introduction

Pancreatic carcinoma (PC) belongs to the most aggressive tumours worldwide, with a five year survival of 7%. Mostly, diagnosis is made in late stages, as by now no early detection method is available. Symptoms of depression occur frequently before diagnosis of PC. PC and depression are both known to go along with changes in the kynurenine-pathway.

Objectives

This study aimed to examine the kynurenine pathway (Figure 1) and evaluate a possible depression in newly diagnosed PC patients in comparison to healthy controls (HC).

Methods

26 PC patients and 26 age and sex matched HC participated in this study. We investigated serum-levels of kynurenine, kynurenic-acid, quinolinic-acid and tryptophan. To diagnose features of depression SKID-II and BDI were used.

Results

None of the participants fulfilled criteria of a depressive episode. Regarding BDI-scores, 2 PC-patients showed features of mild depression. PC patients showed significantly lower tryptophan-levels (P = 0.05) and significantly increased quinolinic-acid levels (P = 0.01) compared to HC. Quinolinic-acid levels were correlated with BDI (r = 0.23, P = 0.02).

Conclusions

Our study results imply IDO-activation and kynurenine-pathway activation by showing decreased tryptophan and high quinolonic-acid levels in our PC patients compared to HC. Larger studies are needed to gather further insight in the kynurenine pathway in PC.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

Figure 1

Type
e-Poster viewing: Comorbidity/dual pathologies
Information
European Psychiatry , Volume 41 , Issue S1: Abstract of the 25th European Congress of Psychiatry , April 2017 , pp. S480
Copyright
Copyright © European Psychiatric Association 2017
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