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Diverse Glial Cell Line-Derived Neurotrophic Factor (GDNF) Support Between Mania and Schizophrenia: A Comparative Study in Four Major Psychiatric Disorders

Published online by Cambridge University Press:  15 April 2020

Z. Tunca ,
B. Kıvırcık Akdede ,
A. Özerdem ,
T. Alkın ,
S. Polat ,
D. Ceylan ,
M. Bayın ,
N. Cengizçetin Kocuk ,
S. Şimşek  and
H. Resmi
...Show all authors
Z. Tunca*
Affiliation:
Dokuz Eylul University, Medical School, Izmir, Turkey
B. Kıvırcık Akdede
Affiliation:
Dokuz Eylul University, Medical School, Izmir, Turkey
A. Özerdem
Affiliation:
Dokuz Eylul University, Medical School, Izmir, Turkey
T. Alkın
Affiliation:
Dokuz Eylul University, Medical School, Izmir, Turkey
S. Polat
Affiliation:
Manisa, Turkey
D. Ceylan
Affiliation:
Gümüşhane, Turkey
M. Bayın
Affiliation:
Niğde, Turkey
N. Cengizçetin Kocuk
Affiliation:
Bingöl, Turkey
S. Şimşek
Affiliation:
Hatay, Turkey
H. Resmi
Affiliation:
Dokuz Eylul University, Medical School, Izmir, Turkey
P. Akan
Affiliation:
Dokuz Eylul University, Medical School, Izmir, Turkey
*
*Corresponding author at: Dokuz Eylul University, Medical School, Department of Psychiatry, Balcova, 35340 Izmir, Turkey. Tel.: +90 232 412 41 50. E-mail addresses:[email protected], [email protected] (Z. Tunca).
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Abstract

Background:

Brain-derived neurotrophic factor (BDNF) and glial cell line-derived neurotrophic factor (GDNF) have essential roles in synaptic plasticity which is involved in pathogenesis and treatment of psychiatric disorders. However, it is not clear whether they act simultaneously during illness states in major psychiatric disorders.

Methods:

BDNF and GDNF serum levels were measured concomitantly by enzyme-linked immunosorbent assay (ELISA) method in 171 patients diagnosed with schizophrenia (n = 33), bipolar disorder-manic episode (n = 39), bipolar/unipolar depression (n = 64, 24/40) and obsessive-compulsive disorder (n = 35) according to DSM-IV, and 78 healthy volunteers. SCID-I and SCID non-patient version were used for clinical evaluation of the patients and healthy volunteers, respectively. Correlations between the two trophic factor levels, and illness severity scores, duration of illness and medication dosages were studied across different illnesses.

Results:

While patients had equally lower BDNF levels in all diagnoses, GDNF levels were significantly higher in mania and lower in schizophrenia compared to healthy controls. BDNF levels were negatively correlated to illness severity scores in affective episodes (mania and depression). Longer duration of illness (> 5 years) had an impact on lower GDNF levels in schizophrenia. BDNF levels and antipsychotic drug dosages in schizophrenia, and GDNF levels and antidepressant drug dosages in obsessive-compulsive disorder were positively correlated.

Conclusion:

Our data confirmed the evidence of equally deficient neuronal support by BDNF in all major psychiatric illnesses, but suggested a diverse glial functioning between schizophrenia and mania.

Keywords

Brain-derived neurotrophic factor (BDNF)Glial cell line-derived neurotrophic factor (GDNF)SchizophreniaManiaDepressionObsessive-compulsive disorder
Type
Original article
Information
European Psychiatry , Volume 30 , Issue 2 , February 2015 , pp. 198 - 204
Copyright
Copyright © Elsevier Masson SAS 2014

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Footnotes

1

Retired in September 16, 2014.

2

Formerly, residents in Dokuz Eylul University, Medical School, Department of Psychiatry.

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