Circulating Levels of Glial Cell Line-Derived Neurotrophic Factor (GDNF) in Schizophrenia: a systematic review and meta-analysis

Abstract Background Glial cell line-derived neurotrophic factor (GDNF) has emerged as a potential biomarker for schizophrenia (SCZ). However, GDNF levels remain unclear in affected individuals compared to healthy controls. Therefore, we aimed to calculate a pooled estimate of GDNF levels in patients...

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Main Authors: Omran Davarinejad, Saeid Komasi, Mohammad-Taher Moradi, Farzaneh Golmohammadi, Maryam Bahrami, Hamed Esmaeil Lashgarian, Masumeh Jalalvand, Sara Hookari, Fatemeh Kazemisafa
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Language:English
Published: BMC 2025-01-01
Series:BMC Psychiatry
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Online Access:https://doi.org/10.1186/s12888-025-06498-9
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author Omran Davarinejad
Saeid Komasi
Mohammad-Taher Moradi
Farzaneh Golmohammadi
Maryam Bahrami
Hamed Esmaeil Lashgarian
Masumeh Jalalvand
Sara Hookari
Fatemeh Kazemisafa
author_facet Omran Davarinejad
Saeid Komasi
Mohammad-Taher Moradi
Farzaneh Golmohammadi
Maryam Bahrami
Hamed Esmaeil Lashgarian
Masumeh Jalalvand
Sara Hookari
Fatemeh Kazemisafa
author_sort Omran Davarinejad
collection DOAJ
description Abstract Background Glial cell line-derived neurotrophic factor (GDNF) has emerged as a potential biomarker for schizophrenia (SCZ). However, GDNF levels remain unclear in affected individuals compared to healthy controls. Therefore, we aimed to calculate a pooled estimate of GDNF levels in patients with SCZ in comparison with healthy controls. Methods A systematic search was performed in PubMed, Scopus, Web of Science, and Science Direct for published studies from the first date available up to 17 June 2024. Twelve studies (n = 817 patients and 691 healthy controls) were included in the meta-analysis. Subgroup analyses and meta-regression were performed, addressing heterogeneity and publication bias. Results Random-effects estimates (d = –0.80, p < 0.001) of the present meta-analysis revealed a significant mean difference in GDNF levels between SCZ patients and healthy controls. Subgroup analyses indicated that the standardized mean difference of GDNF was larger in European samples (d = –1.01, p ≤ 0.001) than in the Asian population (d = –0.61, p = 0.011). Non-medicated SCZ patients (d = –1.08, p ≤ 0.001) exhibited lower GDNF levels than those on medication (d = – 0.70, p = 0.004). Additionally, patients with a disease duration of ≥ 10 years showed lower levels of GDNF (d = –0.93, p = 0.058 versus d = –0.82, p = 0.002). Conclusions The findings suggested that GDNF may be a promising biomarker and therapeutic target for schizophrenia. Future research should focus on elucidating the mechanisms underlying altered GDNF levels and exploring its implications for treatment strategies.
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spelling doaj-art-78398546c073451f9a541ce2555025df2025-02-02T12:36:03ZengBMCBMC Psychiatry1471-244X2025-01-0125111010.1186/s12888-025-06498-9Circulating Levels of Glial Cell Line-Derived Neurotrophic Factor (GDNF) in Schizophrenia: a systematic review and meta-analysisOmran Davarinejad0Saeid Komasi1Mohammad-Taher Moradi2Farzaneh Golmohammadi3Maryam Bahrami4Hamed Esmaeil Lashgarian5Masumeh Jalalvand6Sara Hookari7Fatemeh Kazemisafa8Clinical Research Development Center, Imam Khomeini and Mohammad Kermanshahi and Farabi Hospitals, Kermanshah University of Medical SciencesDepartment of Neuroscience and Psychopathology Research, Mind GPS InstituteSleep Disorders Research Center, Health Policy and Promotion Institute, Kermanshah University of Medical SciencesClinical Research Development Center, Imam Khomeini and Mohammad Kermanshahi and Farabi Hospitals, Kermanshah University of Medical SciencesClinical Research Development Center, Imam Khomeini and Mohammad Kermanshahi and Farabi Hospitals, Kermanshah University of Medical SciencesDepartment of Medical Biotechnology, Faculty of Medicine, Lorestan University of Medical SciencesDepartment of Medical Biotechnology, Faculty of Medicine, Lorestan University of Medical SciencesClinical Research Development Center, Imam Khomeini and Mohammad Kermanshahi and Farabi Hospitals, Kermanshah University of Medical SciencesClinical Research Development Center, Imam Khomeini and Mohammad Kermanshahi and Farabi Hospitals, Kermanshah University of Medical SciencesAbstract Background Glial cell line-derived neurotrophic factor (GDNF) has emerged as a potential biomarker for schizophrenia (SCZ). However, GDNF levels remain unclear in affected individuals compared to healthy controls. Therefore, we aimed to calculate a pooled estimate of GDNF levels in patients with SCZ in comparison with healthy controls. Methods A systematic search was performed in PubMed, Scopus, Web of Science, and Science Direct for published studies from the first date available up to 17 June 2024. Twelve studies (n = 817 patients and 691 healthy controls) were included in the meta-analysis. Subgroup analyses and meta-regression were performed, addressing heterogeneity and publication bias. Results Random-effects estimates (d = –0.80, p < 0.001) of the present meta-analysis revealed a significant mean difference in GDNF levels between SCZ patients and healthy controls. Subgroup analyses indicated that the standardized mean difference of GDNF was larger in European samples (d = –1.01, p ≤ 0.001) than in the Asian population (d = –0.61, p = 0.011). Non-medicated SCZ patients (d = –1.08, p ≤ 0.001) exhibited lower GDNF levels than those on medication (d = – 0.70, p = 0.004). Additionally, patients with a disease duration of ≥ 10 years showed lower levels of GDNF (d = –0.93, p = 0.058 versus d = –0.82, p = 0.002). Conclusions The findings suggested that GDNF may be a promising biomarker and therapeutic target for schizophrenia. Future research should focus on elucidating the mechanisms underlying altered GDNF levels and exploring its implications for treatment strategies.https://doi.org/10.1186/s12888-025-06498-9Glial cell line-derived neurotrophic factorGDNFMeta-analysisSchizophrenia
spellingShingle Omran Davarinejad
Saeid Komasi
Mohammad-Taher Moradi
Farzaneh Golmohammadi
Maryam Bahrami
Hamed Esmaeil Lashgarian
Masumeh Jalalvand
Sara Hookari
Fatemeh Kazemisafa
Circulating Levels of Glial Cell Line-Derived Neurotrophic Factor (GDNF) in Schizophrenia: a systematic review and meta-analysis
BMC Psychiatry
Glial cell line-derived neurotrophic factor
GDNF
Meta-analysis
Schizophrenia
title Circulating Levels of Glial Cell Line-Derived Neurotrophic Factor (GDNF) in Schizophrenia: a systematic review and meta-analysis
title_full Circulating Levels of Glial Cell Line-Derived Neurotrophic Factor (GDNF) in Schizophrenia: a systematic review and meta-analysis
title_fullStr Circulating Levels of Glial Cell Line-Derived Neurotrophic Factor (GDNF) in Schizophrenia: a systematic review and meta-analysis
title_full_unstemmed Circulating Levels of Glial Cell Line-Derived Neurotrophic Factor (GDNF) in Schizophrenia: a systematic review and meta-analysis
title_short Circulating Levels of Glial Cell Line-Derived Neurotrophic Factor (GDNF) in Schizophrenia: a systematic review and meta-analysis
title_sort circulating levels of glial cell line derived neurotrophic factor gdnf in schizophrenia a systematic review and meta analysis
topic Glial cell line-derived neurotrophic factor
GDNF
Meta-analysis
Schizophrenia
url https://doi.org/10.1186/s12888-025-06498-9
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