1
|
Vajagathali M, Ramakrishnan V. Genetic predisposition of BDNF (rs6265) gene is susceptible to Schizophrenia: A prospective study and updated meta-analysis. Neurologia 2024; 39:361-371. [PMID: 38616064 DOI: 10.1016/j.nrleng.2024.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 10/28/2021] [Indexed: 04/16/2024] Open
Abstract
INTRODUCTION Genetic polymorphism in the BDNF gene has been found to cause neuronal alterations and has been identified as a causal factor for many neuropsychiatric disorders. Therefore, various neurological case-control studies and meta-analyses have been conducted to find the possible link between BDNF and susceptibility to schizophrenia. METHOD This meta-analysis gathered data from 25 case-control studies including a total of 8384 patients with schizophrenia and 8821 controls in order to identify the relationship between the rs6265 single nucleotide polymorphism and the disease, evaluating the combined odds ratio and 95% confidence intervals under 5 different genetic models. Validation followed the "Leave one out" method, and we used the Egger test and Begg's funnel plot to identify publication bias. RESULTS Research into the rs6265 (G/A) polymorphism revealed a non-significant association with schizophrenia in all 5 genetic models; in the subgroup analysis, no association was found between white and Asian populations, with a p value>.05. CONCLUSIONS Overall, the updated meta-analysis revealed that rs6265 exonic polymorphisms do not increase susceptibility to this disease. However, to better understand the pathogenesis of the disease, there is a need for further case-control studies into the BDNF polymorphism including larger sample sizes and different ethnic groups.
Collapse
Affiliation(s)
- M Vajagathali
- Human Cytogenetics and Genomics Laboratory, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, Tamilnadu, India
| | - V Ramakrishnan
- Human Cytogenetics and Genomics Laboratory, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, Tamilnadu, India.
| |
Collapse
|
2
|
Bednářová A, Habalová V, Tkáč I. BDNF rs962369 Is Associated with Major Depressive Disorder. Biomedicines 2023; 11:2243. [PMID: 37626739 PMCID: PMC10452342 DOI: 10.3390/biomedicines11082243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 07/30/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
This study enrolled 291 patients diagnosed with depression and schizophrenia (F32, F33, and F20 according to ICD-10) and 227 ethnicity-matched control subjects. We analyzed the distribution of BDNF rs6265 and BDNF rs962369 genotypes, finding no significant associations between these and schizophrenia. We revealed a significant increase in the risk of single-episode major depression disorder (MDD) for rs962369 minor allele homozygotes (CC vs. TT+TC), an association that persisted after adjusting for age and sex (OR 3.47; 95% CI 1.36-8.85; p = 0.009). Furthermore, rs962369 genotype was significantly associated with an increased risk of recurrent MDD in a log-additive model (OR per C-allele 1.65; 95% CI 1.11-2.45; p = 0.013). A comparative analysis between MDD subtypes and between MDD subtypes and schizophrenia showed no significant differences for BDNF rs6265. Notably, the frequency of minor allele C of BDNF rs962369 varied across subgroups, with the highest frequency in patients with recurrent MDD (0.32) and the lowest in schizophrenia patients (0.20). The presence of genotypes with at least one minor allele C was significantly higher in the recurrent MDD patient group compared to the schizophrenia group. In conclusion, the BDNF rs962369 variant was associated with MDD but not with schizophrenia.
Collapse
Affiliation(s)
- Aneta Bednářová
- 2nd Department of Psychiatry, Faculty of Medicine, Pavol Jozef Safarik University and Louis Pasteur University Hospital, 041 90 Kosice, Slovakia
| | - Viera Habalová
- Department of Medical Biology, Faculty of Medicine, Pavol Jozef Safarik University, 040 11 Kosice, Slovakia;
| | - Ivan Tkáč
- 4th Department of Internal Medicine, Faculty of Medicine, Pavol Jozef Safarik University and Louis Pasteur University Hospital, 041 90 Kosice, Slovakia;
| |
Collapse
|
3
|
Xia Y, Song X, Wu L, Li J, Liu N, Cui W. Pathoclinical associations between panic disorders and the brain-derived neurotrophic factor Val66Met polymorphism: an updated meta-analysis. Psychiatr Genet 2023; 33:50-58. [PMID: 36794980 PMCID: PMC9997625 DOI: 10.1097/ypg.0000000000000337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 01/21/2023] [Indexed: 02/17/2023]
Abstract
Prior studies have indicated the pathological role of brain-derived neurotrophic factor (BDNF) gene polymorphism in panic disorders (PD). A functionally less active BDNF Val66Met mutant was previously detected in PD patients with different ethnic backgrounds. However, the results remain inconclusive or inconsistent. A meta-analysis was used to explore the consistency of the BDNF Val66Met mutant's association with PD irrespective of the subject's ethnicity. Relevant case-controlled full-length clinical and preclinical reports were retrieved by database searching, and 11 articles involving 2203 cases and 2554 controls were systematically selected per the standard inclusion criteria. Eleven articles were finally included that explored the relationship between the Val66Met polymorphism and PD risk susceptibility. Statistical analysis revealed a significant genetic association of the mutation, allele frequencies, and genotype distributions of BDNF with PD onset. Our findings demonstrated that the BDNF Val66Met is a susceptibility factor of PD.
Collapse
Affiliation(s)
- Yu Xia
- Department of Psychiatry, Shenyang Mental Health Center, Shenyang
| | - Xun Song
- Grade 2020, College of Mental Health, Bengbu Medical University, Bengbu
| | - Lijuan Wu
- Department of Psychiatry, Shenyang Mental Health Center, Shenyang
| | - Jun Li
- Department of Psychiatry, Shenyang Anning Hospital, Shenyang
| | - Nan Liu
- China National Tobacco Quality Supervision and Test Centre, Zhengzhou, China
| | - Wenhui Cui
- Department of Psychiatry, Shenyang Mental Health Center, Shenyang
| |
Collapse
|
4
|
Vouga Ribeiro N, Tavares V, Bramon E, Toulopoulou T, Valli I, Shergill S, Murray R, Prata D. Effects of psychosis-associated genetic markers on brain volumetry: a systematic review of replicated findings and an independent validation. Psychol Med 2022; 52:1-16. [PMID: 36168994 PMCID: PMC9811278 DOI: 10.1017/s0033291722002896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 08/13/2022] [Accepted: 08/24/2022] [Indexed: 01/12/2023]
Abstract
BACKGROUND Given psychotic illnesses' high heritability and associations with brain structure, numerous neuroimaging-genetics findings have been reported in the last two decades. However, few findings have been replicated. In the present independent sample we aimed to replicate any psychosis-implicated SNPs (single nucleotide polymorphisms), which had previously shown at least two main effects on brain volume. METHODS A systematic review for SNPs showing a replicated effect on brain volume yielded 25 studies implicating seven SNPs in five genes. Their effect was then tested in 113 subjects with either schizophrenia, bipolar disorder, 'at risk mental state' or healthy state, for whole-brain and region-of-interest (ROI) associations with grey and white matter volume changes, using voxel-based morphometry. RESULTS We found FWER-corrected (Family-wise error rate) (i.e. statistically significant) associations of: (1) CACNA1C-rs769087-A with larger bilateral hippocampus and thalamus white matter, across the whole brain; and (2) CACNA1C-rs769087-A with larger superior frontal gyrus, as ROI. Higher replication concordance with existing literature was found, in decreasing order, for: (1) CACNA1C-rs769087-A, with larger dorsolateral-prefrontal/superior frontal gyrus and hippocampi (both with anatomical and directional concordance); (2) ZNF804A-rs11681373-A, with smaller angular gyrus grey matter and rectus gyri white matter (both with anatomical and directional concordance); and (3) BDNF-rs6265-T with superior frontal and middle cingulate gyri volume change (with anatomical and allelic concordance). CONCLUSIONS Most literature findings were not herein replicated. Nevertheless, high degree/likelihood of replication was found for two genome-wide association studies- and one candidate-implicated SNPs, supporting their involvement in psychosis and brain structure.
Collapse
Affiliation(s)
- Nuno Vouga Ribeiro
- Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Vânia Tavares
- Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Elvira Bramon
- Division of Psychiatry, University College London, London, UK
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’ College London, London, UK
- Institute of Cognitive Neuroscience, University College London, London, UK
| | - Timothea Toulopoulou
- Department of Psychology & National Magnetic Resonance Research Center (UMRAM), Aysel Sabuncu Brain Research Centre (ASBAM), Bilkent University, Ankara, Turkey
| | - Isabel Valli
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’ College London, London, UK
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Sukhi Shergill
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’ College London, London, UK
| | - Robin Murray
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’ College London, London, UK
| | - Diana Prata
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
- Department of Old Age Psychiatry, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
| |
Collapse
|
5
|
Vajagathali M, Ramakrishnan V. Genetic predisposition of BDNF (rs6265) gene is susceptible to Schizophrenia: A prospective study and updated meta-analysis. Neurologia 2022. [DOI: 10.1016/j.nrl.2021.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
6
|
Bellia F, Vismara M, Annunzi E, Cifani C, Benatti B, Dell'Osso B, D'Addario C. Genetic and epigenetic architecture of Obsessive-Compulsive Disorder: In search of possible diagnostic and prognostic biomarkers. J Psychiatr Res 2021; 137:554-571. [PMID: 33213890 DOI: 10.1016/j.jpsychires.2020.10.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/25/2020] [Accepted: 10/28/2020] [Indexed: 02/07/2023]
Abstract
Obsessive-Compulsive Disorder (OCD) is a prevalent and severe clinical condition whose hallmarks are excessive, unwanted thoughts (obsessions) and repetitive behaviors (compulsions). The onset of symptoms generally occurs during pre-adult life and typically affects subjects in different aspects of their life's, compromising social and professional relationships. Although robust evidence suggests a genetic component in the etiopathogenesis of OCD, the causes of the disorder are still not completely understood. It is thus of relevance to take into account how genes interact with environmental risk factors, thought to be mediated by epigenetic mechanisms. We here provide an overview of genetic and epigenetic mechanisms of OCD, focusing on the modulation of key central nervous system genes, in the attempt to suggest possible disease biomarkers.
Collapse
Affiliation(s)
- Fabio Bellia
- Faculty of Bioscience, University of Teramo, Teramo, Italy
| | - Matteo Vismara
- Department of Biomedical and Clinical Sciences Luigi Sacco, University of Milan, Milano, Italy
| | - Eugenia Annunzi
- Faculty of Bioscience, University of Teramo, Teramo, Italy; Department of Neuroscience, Imaging and Clinical Sciences, Gabriele D'Annunzio University, Chieti, Italy
| | - Carlo Cifani
- School of Pharmacy, University of Camerino, Camerino, Italy
| | - Beatrice Benatti
- Department of Biomedical and Clinical Sciences Luigi Sacco, University of Milan, Milano, Italy; CRC "Aldo Ravelli", University of Milan, Milano, Italy
| | - Bernardo Dell'Osso
- Department of Biomedical and Clinical Sciences Luigi Sacco, University of Milan, Milano, Italy; CRC "Aldo Ravelli", University of Milan, Milano, Italy; Department of Psychiatry and Behavioral Sciences, Stanford University, CA, USA.
| | - Claudio D'Addario
- Faculty of Bioscience, University of Teramo, Teramo, Italy; Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
| |
Collapse
|
7
|
Harb M, Jagusch J, Durairaja A, Endres T, Leßmann V, Fendt M. BDNF haploinsufficiency induces behavioral endophenotypes of schizophrenia in male mice that are rescued by enriched environment. Transl Psychiatry 2021; 11:233. [PMID: 33888685 PMCID: PMC8062437 DOI: 10.1038/s41398-021-01365-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 03/26/2021] [Accepted: 04/12/2021] [Indexed: 02/02/2023] Open
Abstract
Brain-derived neurotrophic factor (BDNF) is implicated in a number of processes that are crucial for healthy functioning of the brain. Schizophrenia is associated with low BDNF levels in the brain and blood, however, not much is known about BDNF's role in the different symptoms of schizophrenia. Here, we used BDNF-haploinsufficient (BDNF+/-) mice to investigate the role of BDNF in different mouse behavioral endophenotypes of schizophrenia. Furthermore, we assessed if an enriched environment can prevent the observed changes. In this study, male mature adult wild-type and BDNF+/- mice were tested in mouse paradigms for cognitive flexibility (attentional set shifting), sensorimotor gating (prepulse inhibition), and associative emotional learning (safety and fear conditioning). Before these tests, half of the mice had a 2-month exposure to an enriched environment, including running wheels. After the tests, BDNF brain levels were quantified. BDNF+/- mice had general deficits in the attentional set-shifting task, increased startle magnitudes, and prepulse inhibition deficits. Contextual fear learning was not affected but safety learning was absent. Enriched environment housing completely prevented the observed behavioral deficits in BDNF+/- mice. Notably, the behavioral performance of the mice was negatively correlated with BDNF protein levels. These novel findings strongly suggest that decreased BDNF levels are associated with several behavioral endophenotypes of schizophrenia. Furthermore, an enriched environment increases BDNF protein to wild-type levels and is thereby able to rescue these behavioral endophenotypes.
Collapse
Affiliation(s)
- Mahmoud Harb
- grid.5807.a0000 0001 1018 4307Institute for Pharmacology and Toxicology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Justina Jagusch
- grid.5807.a0000 0001 1018 4307Institute for Pharmacology and Toxicology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Archana Durairaja
- grid.5807.a0000 0001 1018 4307Institute for Pharmacology and Toxicology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Thomas Endres
- grid.5807.a0000 0001 1018 4307Institute of Physiology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Volkmar Leßmann
- Institute of Physiology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany. .,Center for Behavioral Brain Sciences, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.
| | - Markus Fendt
- Institute for Pharmacology and Toxicology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany. .,Center for Behavioral Brain Sciences, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.
| |
Collapse
|
8
|
Su J, Liu P, Liu B, Zhang Y. BDNF polymorphisms across the spectrum of psychiatric morbidity: A protocol for a systematic review and meta-analysis. Medicine (Baltimore) 2020; 99:e22875. [PMID: 33157930 PMCID: PMC7647535 DOI: 10.1097/md.0000000000022875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Nowadays, psychiatric morbidities are more and more common, which imposes huge social and economic burden on all countries across the world. Mental illnesses are found to be related to genetics. Over the past few years, a large number of risk genes and loci related to psychiatric morbidities have been reported. The brain-derived neurotrophic factor (BDNF) is one of the main candidates in neuropsychiatric genetics. However, different studies have shown inconsistencies regarding effect modification of BDNF polymorphisms on psychiatric morbidities. Therefore, in the present study, we aim to qualitatively and quantitatively summarize the relationship between BDNF single nucleotide polymorphisms (SNPs) and various psychiatric morbidities through a meta-analysis. METHODS PubMed, Web of Science and Embase will be searched using a specified search strategy to identify relevant studies up to April 2020. The meta-analysis will be performed on (1) allele model, (2) dominant model, (3) recessive model, (4) homozygote, and (5) heterozygote model. Sensitivity analyses will be conducted to explore the impact of individual studies on the overall result by evaluating the odd ratios (ORs) with their corresponding 95% confidence intervals (CIs) before and after removing each of the studies from our meta-analysis. Chi-square test will be used to determine whether the observed allele or genotype frequencies in the controls are consistent with HWE. The statistical heterogeneity will be verified by I statistics. The fixed effects model is needed to estimate the ORs and 95% CIs when there was no heterogeneity between results of included studies (I < 50%); instead, the random effects model should be used when results of included studies showed significant heterogeneity (I > 50%). Publication bias will be evaluated with the use of Begg test and Egger test (P < .05 is considered statistically significant). DISCUSSION With this protocol, a methodology is established that explores the effect modification of BDNF polymorphisms on the association with psychiatric morbidities. Findings from this meta-analysis can provide significant insight into the etiology of psychiatric morbidities. REGISTRATION Open Science Framework (OSF) Preregistration. September 15, 2020. OSF.IO/QS7XT.
Collapse
Affiliation(s)
- Jingzhi Su
- Department of Psychiatry, The Second Xiangya Hospital
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University
| | - Peiqu Liu
- Department of Psychiatry, The Second Xiangya Hospital
| | - Bangshan Liu
- Department of Psychiatry, The Second Xiangya Hospital
- Mental Health Institute of Central South University, China National Clinical Research Center on Mental Disorders (Xiangya), China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan, China
| | - Yan Zhang
- Department of Psychiatry, The Second Xiangya Hospital
- Mental Health Institute of Central South University, China National Clinical Research Center on Mental Disorders (Xiangya), China National Technology Institute on Mental Disorders, Hunan Technology Institute of Psychiatry, Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan, China
| |
Collapse
|
9
|
Kumar PK, Mitra P, Ghosh R, Sharma S, Nebhinani N, Sharma P. Association of circulating BDNF levels with BDNF rs6265 polymorphism in schizophrenia. Behav Brain Res 2020; 394:112832. [PMID: 32726665 DOI: 10.1016/j.bbr.2020.112832] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 07/15/2020] [Accepted: 07/22/2020] [Indexed: 01/26/2023]
Abstract
Schizophrenia is a severe neuropsychiatric disorder affecting 1% of the world population. Disturbances in neuronal development and synaptic connections are important factors in the pathogenesis of schizophrenia. Brain derived neurotrophic factor (BDNF), a member of the neurotrophin family, plays a critical role in the development of neurons. Among several polymorphisms reported in BDNF, the rs6265 polymorphism is known to be associated with many neuropsychiatric diseases. This study was aimed to determine the effect of BDNF rs6265 functional polymorphism on serum BDNF concentration in patients with schizophrenia. In total, 50 schizophrenia patients and 50 controls were recruited after obtaining written informed consent. Serum BDNF levels were estimated using the ELISA method and BDNF rs6265 polymorphism was genotyped using T-ARMS PCR. Serum BDNF levels were decreased significantly in schizophrenia patients when compared to the healthy controls (p < 0.0001). Further, the rs6265 polymorphism was also not associated with the schizophrenia (p = 0.41). Intragroup analysis between different genotypes revealed no association between the serum BDNF levels and rs6265 polymorphism. Our results suggest that the functional polymorphism rs6265 is not associated with serum BDNF levels, which is in line with previous findings, which indicates that serum BDNF levels depend more on diagnostic effect than genetic effect. Replication studies on a larger study population are needed.
Collapse
Affiliation(s)
- Pvsn Kiran Kumar
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, India
| | - Prasenjit Mitra
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, India
| | - Raghumoy Ghosh
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, India
| | - Shailja Sharma
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, India
| | - Naresh Nebhinani
- Department of Psychiatry, All India Institute of Medical Sciences, Jodhpur, India
| | - Praveen Sharma
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, India.
| |
Collapse
|
10
|
An Analysis of Five TrkB Gene Polymorphisms in Schizophrenia and the Interaction of Its Haplotype with rs6265 BDNF Gene Polymorphism. DISEASE MARKERS 2020; 2020:4789806. [PMID: 32351633 PMCID: PMC7174942 DOI: 10.1155/2020/4789806] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 03/06/2020] [Indexed: 11/17/2022]
Abstract
Aim The BDNF dysfunction in the schizophrenia has been soundly documented. The TrkB gene is a high-affinity receptor of the BDNF that is changed in schizophrenia and mood disorders. The study had two aims: first, to identify whether the five nucleotide polymorphisms (SNPs) in TrkB gene are associated with a diagnosis of schizophrenia; and the latter, if any association exists between the TrkB SNPs and psychopathology, suicide attempts, and family history of schizophrenia in a Caucasian population. Methods Case-control study (401 patients and 657 healthy controls) was used to examine a predisposition for schizophrenia. The tests for psychopathology, suicide attempts, and family history of schizophrenia were conducted only in patient group. The severity of the schizophrenia was measured using the five-factor model of the PANSS. In addition, the haplotype analysis for both the separate for SNPs of TrkB gene and in combination with the rs6265 SNP BDNF gene was conducted. Results Our case-control study revealed that the genetic variants of rs10868235 (T/T polymorphic genotype) and rs1387923 (G/G polymorphic genotype) of the TrkB gene were associated with a higher risk of developing schizophrenia in men. However, the A/A wild genotype of rs1387923 was connected with a lower risk for both the development of and the family manifestation of schizophrenia in men. The G polymorphic allele of rs1565445 was associated with an increased risk of suicide in schizophrenia. The tested SNPs of the TrkB gene did not modulate the psychopathology of schizophrenia. The haplotype that was built with five SNPs in the TrkB gene was protective for men, but after joining the rs6265 SNP of the BDNF gene, a haplotype that was protective for women was created.
Collapse
|
11
|
Lin CC, Huang TL. Brain-derived neurotrophic factor and mental disorders. Biomed J 2020; 43:134-142. [PMID: 32386841 PMCID: PMC7283564 DOI: 10.1016/j.bj.2020.01.001] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 01/21/2020] [Accepted: 01/21/2020] [Indexed: 12/26/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF) is a neurotrophin that modulates neuroplasticity in the brain, and is one of the most widely investigated molecule in psychiatric disorders. The researches of BDNF emcompassed the advance of investigative techniques of past decades. BDNF researches ranged from protein quantilization, to RNA expression measurements, to DNA sequencing, and lately but not lastly, epigenetic studies. In this review, we will briefly address findings on BDNF protein levels, mRNA expression, Val66Met polymorphism, and epigenetic modifications, in schizophrenia, major depressive disorder (MDD), and bipolar disorder.
Collapse
Affiliation(s)
- Chin-Chuen Lin
- Department of Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Tiao-Lai Huang
- Department of Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan; Genomic and Proteomic Core Laboratory, Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan.
| |
Collapse
|
12
|
Jena M, Ranjan R, Mishra BR, Mishra A, Nath S, Sahu P, Meher BR, Srinivasan A, Maiti R. Effect of lurasidone vs olanzapine on neurotrophic biomarkers in unmedicated schizophrenia: A randomized controlled trial. J Psychiatr Res 2019; 112:1-6. [PMID: 30782512 DOI: 10.1016/j.jpsychires.2019.02.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/07/2019] [Accepted: 02/11/2019] [Indexed: 11/19/2022]
Abstract
Neurotrophic factors like Brain-Derived Neurotrophic Factor (BDNF), Neurotrophin 3 (NT3) and Nerve Growth Factor (NGF), play a role in neuroplasticity and neurogenesis contributing to the pathogenesis of schizophrenia. The objective of the present study was to investigate and compare the effect of olanzapine and lurasidone on the change in serum neurotrophins in patients with schizophrenia. The present study was a randomized, open-label, active-controlled, parallel design clinical trial. After randomization baseline evaluations of serum BDNF, NGF, NT3, Positive and Negative Syndrome Scale (PANSS) scoring, Social and Occupational Functioning Assessment Scale (SOFAS) scoring of 101 unmedicated schizophrenia patients were done. Patients were reassessed after 6 weeks of monotherapy with olanzapine or lurasidone. Serum BDNF increased after treatment with both the drug groups but rise with olanzapine was found to be significantly higher (916.22; 95 %CI: 866.07 to 966.37; p < 0.001) in comparison to lurasidone. Increase in levels NGF and NT3 was also observed but there was no significant difference between the groups (NGF: 2.32; CI: 3.54 to -3.53; p = 0.57 and NT3: 0.99; CI: 2.11 to 0.14; p = 0.086). The difference in improvement in PANSS and SOFASS with both the drugs was not statistically significant. Both the drugs alleviate the symptoms of schizophrenia but olanzapine was better tolerated. Our findings suggest that increase in serum BDNF with olanzapine monotherapy is significantly higher than that with lurasidone but there is no significant difference in change in serum NGF and NT3. TRIAL REGISTRATION: ClinicalTrials.gov identifier: (NCT03304457).
Collapse
Affiliation(s)
- Monalisa Jena
- Department of Pharmacology, All India Institute of Medical Sciences (AIIMS), Bhubaneswar, India.
| | - Rajeev Ranjan
- Department of Psychiatry, All India Institute of Medical Sciences (AIIMS), Patna, India.
| | - Biswa Ranjan Mishra
- Department of Psychiatry, All India Institute of Medical Sciences (AIIMS), Bhubaneswar, India.
| | | | - Santanu Nath
- Department of Psychiatry, All India Institute of Medical Sciences (AIIMS), Bhubaneswar, India.
| | - Pallabi Sahu
- Department of Psychiatry, KIMS, Bhubaneswar, India.
| | | | - Anand Srinivasan
- Department of Pharmacology, All India Institute of Medical Sciences (AIIMS), Bhubaneswar, India.
| | - Rituparna Maiti
- Department of Pharmacology, All India Institute of Medical Sciences (AIIMS), Bhubaneswar, India.
| |
Collapse
|
13
|
Tsai SJ. Critical Issues in BDNF Val66Met Genetic Studies of Neuropsychiatric Disorders. Front Mol Neurosci 2018; 11:156. [PMID: 29867348 PMCID: PMC5962780 DOI: 10.3389/fnmol.2018.00156] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 04/24/2018] [Indexed: 12/20/2022] Open
Abstract
Neurotrophins have been implicated in the pathophysiology of many neuropsychiatric diseases. Brain-derived neurotrophic factor (BDNF) is the most abundant and widely distributed neurotrophin in the brain. Its Val66Met polymorphism (refSNP Cluster Report: rs6265) is a common and functional single-nucleotide polymorphism (SNP) affecting the activity-dependent release of BDNF. BDNF Val66Met transgenic mice have been generated, which may provide further insight into the functional impact of this polymorphism in the brain. Considering the important role of BDNF in brain function, more than 1,100 genetic studies have investigated this polymorphism in the past 15 years. Although these studies have reported some encouraging positive findings initially, most of the findings cannot be replicated in following studies. These inconsistencies in BDNF Val66Met genetic studies may be attributed to many factors such as age, sex, environmental factors, ethnicity, genetic model used for analysis, and gene–gene interaction, which are discussed in this review. We also discuss the results of recent studies that have reported the novel functions of this polymorphism. Because many BDNF polymorphisms and non-genetic factors have been implicated in the complex traits of neuropsychiatric diseases, the conventional genetic association-based method is limited to address these complex interactions. Future studies should apply data mining and machine learning techniques to determine the genetic role of BDNF in neuropsychiatric diseases.
Collapse
Affiliation(s)
- Shih-Jen Tsai
- Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan.,School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan
| |
Collapse
|
14
|
Skibinska M, Groszewska A, Kapelski P, Rajewska-Rager A, Pawlak J, Dmitrzak-Weglarz M, Szczepankiewicz A, Twarowska-Hauser J. Val66Met functional polymorphism and serum protein level of brain-derived neurotrophic factor (BDNF) in acute episode of schizophrenia and depression. Pharmacol Rep 2017; 70:55-59. [PMID: 29331787 DOI: 10.1016/j.pharep.2017.08.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 07/04/2017] [Accepted: 08/07/2017] [Indexed: 12/13/2022]
Abstract
BACKGROUND Brain-derived neurotrophic factor (BDNF) influences neuron differentiation during development as well as the synaptic plasticity and neuron survival in adulthood. BDNF has been implicated in the pathogenesis of schizophrenia and depression. Val66Met polymorphism and BDNF serum level are potential biomarkers in neuropsychiatric disorders. The aim of this study was to determine the effect of BDNF gene Val66Met functional polymorphism on serum BDNF concentration in patients with schizophrenia, during depression episode and in healthy control group. METHODS 183 participants were recruited (61 patients with depressive episode, 56 females with schizophrenia, 66 healthy controls) from Polish population. Serum BDNF levels were measured using ELISA method. Val66Met polymorphism was genotyped using PCR- RFLP method. RESULTS Serum BDNF levels were not associated with Val66Met polymorphism in either of the groups. A significant increase of BDNF level in schizophrenia (p = 0.0005) and depression (p = 0.026) comparing to the control group has been observed. CONCLUSIONS Our results suggest that the functional Val66Met BDNF polymorphism is not associated with BDNF serum levels, which is in line with previous findings. Replication studies on larger groups are needed.
Collapse
Affiliation(s)
- Maria Skibinska
- Laboratory of Psychiatric Genetics, Department of Psychiatry, Poznan University of Medical Sciences, Poznań, Poland.
| | - Agata Groszewska
- Department of Biochemistry, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland
| | - Pawel Kapelski
- Laboratory of Psychiatric Genetics, Department of Psychiatry, Poznan University of Medical Sciences, Poznań, Poland
| | | | - Joanna Pawlak
- Laboratory of Psychiatric Genetics, Department of Psychiatry, Poznan University of Medical Sciences, Poznań, Poland
| | - Monika Dmitrzak-Weglarz
- Laboratory of Psychiatric Genetics, Department of Psychiatry, Poznan University of Medical Sciences, Poznań, Poland
| | - Aleksandra Szczepankiewicz
- Laboratory of Psychiatric Genetics, Department of Psychiatry, Poznan University of Medical Sciences, Poznań, Poland; Laboratory of Molecular and Cell Biology, Poznan University of Medical Sciences, Poznań, Poland
| | - Joanna Twarowska-Hauser
- Laboratory of Psychiatric Genetics, Department of Psychiatry, Poznan University of Medical Sciences, Poznań, Poland
| |
Collapse
|
15
|
Abstract
Schizophrenia is a severe disorder affecting approximately 1% of the population. Historically, alterations of dopaminergic function were considered the primary cause of schizophrenia. However, for many patients, drugs that alter dopaminergic function do not consistently lead to resolution of the symptoms of schizophrenia. Thus, there is an increased interest in pathophysiologic processes that result in altered neurodevelopment and plasticity associated with schizophrenia. Brain-derived neurotrophic factor (BDNF) is a neurotrophin involved in neurogenesis, synaptic plasticity, cognition, and neurotransmission. Genetic polymorphism, expression, and function of BDNF have been implicated in psychiatric diseases, including schizophrenia. This review discusses BDNF, its role in neurologic processes, and the evidence implicating BDNF in schizophrenia.
Collapse
Affiliation(s)
- Jessica L Gören
- Associate Professor, University of Rhode Island, Kingston, Rhode Island; Senior Clinical Pharmacist Specialist, Cambridge Health Alliance, Cambridge, Massachusetts; Instructor in Psychiatry, Harvard Medical School, Boston, Massachusetts,
| |
Collapse
|
16
|
Association of the BDNF Val66Met polymorphism with BMI in chronic schizophrenic patients and healthy controls. Int Clin Psychopharmacol 2016; 31:353-7. [PMID: 27483421 DOI: 10.1097/yic.0000000000000142] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Several lines of evidence suggest that a functional variant of the brain-derived neurotrophic factor gene (BDNF Val66Met) correlates with a number of eating disorders. Studies have also shown that the BDNF Val66Met polymorphism was associated with weight gain in patients with schizophrenia on long-term antipsychotic treatment. This study aimed to determine whether there was a relationship between the BDNF Val66Met polymorphism and BMI values in patients with chronic schizophrenia. We compared 308 Han Chinese patients with schizophrenia on long-term antipsychotic medication with 304 healthy normal controls on BDNF polymorphism. Body weight and BMI were measured before breakfast on the day blood samples were taken. The symptomatology of schizophrenia was assessed using the Positive and Negative Syndrome Scale. The results showed that the BDNF Val66Met polymorphism was associated with the BMI value, with genotype having a strong effect on the mean BMI value in male but not in female patients. Our results suggest that variation in the BDNF gene may be a risk factor for weight gain in male patients with schizophrenia on long-term antipsychotic treatment.
Collapse
|
17
|
Fatjó-Vilas M, Prats C, Pomarol-Clotet E, Lázaro L, Moreno C, González-Ortega I, Lera-Miguel S, Miret S, Muñoz MJ, Ibáñez I, Campanera S, Giralt-López M, Cuesta MJ, Peralta V, Ortet G, Parellada M, González-Pinto A, McKenna PJ, Fañanás L. Involvement of NRN1 gene in schizophrenia-spectrum and bipolar disorders and its impact on age at onset and cognitive functioning. World J Biol Psychiatry 2016; 17:129-39. [PMID: 26700405 DOI: 10.3109/15622975.2015.1093658] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVES Neuritin 1 gene (NRN1) is involved in neurodevelopment processes and synaptic plasticity and its expression is regulated by brain-derived neurotrophic factor (BDNF). We aimed to investigate the association of NRN1 with schizophrenia-spectrum disorders (SSD) and bipolar disorders (BPD), to explore its role in age at onset and cognitive functioning, and to test the epistasis between NRN1 and BDNF. METHODS The study was developed in a sample of 954 SSD/BPD patients and 668 healthy subjects. Genotyping analyses included 11 SNPs in NRN1 and one functional SNP in BDNF. RESULTS The frequency of the haplotype C-C (rs645649-rs582262) was significantly increased in patients compared to controls (P = 0.0043), while the haplotype T-C-C-T-C-A (rs3763180-rs10484320-rs4960155-rs9379002-rs9405890-rs1475157) was more frequent in controls (P = 3.1 × 10(-5)). The variability at NRN1 was nominally related to changes in age at onset and to differences in intelligence quotient, in SSD patients. Epistasis between NRN1 and BDNF was significantly associated with the risk for SSD/BPD (P = 0.005). CONCLUSIONS Results suggest that: (i) NRN1 variability is a shared risk factor for both SSD and BPD, (ii) NRN1 may have a selective impact on age at onset and intelligence in SSD, and (iii) the role of NRN1 seems to be not independent of BDNF.
Collapse
Affiliation(s)
- Mar Fatjó-Vilas
- a Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona , Barcelona , Spain ; Institut de Biomedicina de la Universitat de Barcelona (IBUB), Spain;,b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain
| | - Claudia Prats
- a Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona , Barcelona , Spain ; Institut de Biomedicina de la Universitat de Barcelona (IBUB), Spain;,b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain
| | - Edith Pomarol-Clotet
- b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain ;,c FIDMAG Germanes Hospitalàries, Research Foundation , Barcelona , Spain
| | - Luisa Lázaro
- b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain ;,d Servei de Psiquiatria i Psicologia Infantil i Juvenil, Hospital Clínic de Barcelona , Barcelona , Spain ;,e Institut d'investigacions Biomèdiques August Pi Sunyer (IDIBAPS), Barcelona, Spain; Departament de Psiquiatria i Psicobiologia Clínica, Facultat de Medicina, Universitat de Barcelona , Barcelona , Spain
| | - Carmen Moreno
- b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain ;,f Servicio de Psiquiatría del Niño y del Adolescente , Hospital General Universitario Gregorio Marañón, Madrid, Spain; Instituto de Investigación Sanitaria del Hospital Gregorio Marañón (IiSGM); Departamento de Psiquiatría, Facultad de Medicina, Universidad Complutense , Madrid , Spain
| | - Itxaso González-Ortega
- b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain ;,g Psychiatry Service, University Hospital of Alava-Santiago, EMBREC, EHU/UPV University of the Basque Country, Kronikgune , Vitoria , Spain
| | - Sara Lera-Miguel
- d Servei de Psiquiatria i Psicologia Infantil i Juvenil, Hospital Clínic de Barcelona , Barcelona , Spain
| | - Salvador Miret
- b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain ;,h Centre de Salut Mental d'Adults de Lleida, Servei de Psiquiatria, Salut Mental i Addiccions, Hospital Universitari Santa Maria de Lleida , Lleida , Spain
| | - Ma José Muñoz
- i Àrea d'Adolescents, Complex Assistencial en Salut Mental Benito Menni, Sant Boi De Llobregat , Spain
| | - Ignacio Ibáñez
- b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain ;,j Departament de Psicologia Bàsica , Clínica i Psicobiologia, Facultat de Ciències de la Salut, Universitat Jaume I , Castelló , Spain
| | - Sílvia Campanera
- h Centre de Salut Mental d'Adults de Lleida, Servei de Psiquiatria, Salut Mental i Addiccions, Hospital Universitari Santa Maria de Lleida , Lleida , Spain
| | - Maria Giralt-López
- i Àrea d'Adolescents, Complex Assistencial en Salut Mental Benito Menni, Sant Boi De Llobregat , Spain
| | - Manuel J Cuesta
- k Servicio de Psiquiatría, Complejo Hospitalario de Navarra, Pamplona Spain; Instituto de Investigación Sanitaria de Navarra (IdiSNA) , Pamplona , Spain
| | - Victor Peralta
- k Servicio de Psiquiatría, Complejo Hospitalario de Navarra, Pamplona Spain; Instituto de Investigación Sanitaria de Navarra (IdiSNA) , Pamplona , Spain
| | - Generós Ortet
- b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain ;,j Departament de Psicologia Bàsica , Clínica i Psicobiologia, Facultat de Ciències de la Salut, Universitat Jaume I , Castelló , Spain
| | - Mara Parellada
- b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain ;,f Servicio de Psiquiatría del Niño y del Adolescente , Hospital General Universitario Gregorio Marañón, Madrid, Spain; Instituto de Investigación Sanitaria del Hospital Gregorio Marañón (IiSGM); Departamento de Psiquiatría, Facultad de Medicina, Universidad Complutense , Madrid , Spain
| | - Ana González-Pinto
- b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain ;,g Psychiatry Service, University Hospital of Alava-Santiago, EMBREC, EHU/UPV University of the Basque Country, Kronikgune , Vitoria , Spain
| | - Peter J McKenna
- b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain ;,c FIDMAG Germanes Hospitalàries, Research Foundation , Barcelona , Spain
| | - Lourdes Fañanás
- a Departament de Biologia Animal, Facultat de Biologia, Universitat de Barcelona , Barcelona , Spain ; Institut de Biomedicina de la Universitat de Barcelona (IBUB), Spain;,b Instituto De Salud Carlos III, Centro De Investigación Biomédica En Red De Salud Mental (CIBERSAM) , Madrid , Spain
| |
Collapse
|
18
|
Zhao X, Huang Y, Chen K, Li D, Han C, Kan Q. -141C insertion/deletion polymorphism of the dopamine D2 receptor gene is associated with schizophrenia in Chinese Han population: Evidence from an ethnic group-specific meta-analysis. Asia Pac Psychiatry 2016; 8:189-98. [PMID: 26346037 DOI: 10.1111/appy.12206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 07/24/2015] [Indexed: 02/05/2023]
Abstract
Accumulate evidence has implicated dopamine D2 receptor gene polymorphisms in the etiology of schizophrenia. A single nucleotide polymorphism, -141C insertion/deletion (Ins/Del) (rs1799732), in the promoter region of the dopamine D2 receptor gene has been linked to schizophrenia; however, the data are inconclusive. This study investigated whether the -141C polymorphism is associated with the risk of schizophrenia in different ethnic groups by performing a meta-analysis. A total of 24 case-control studies examining the association between -141C Ins/Del polymorphism and schizophrenia were identified according to established inclusion criteria. Significant association was revealed between -141C Ins/Del polymorphism and schizophrenia risk in dominant genetic model (Ins/Ins + Ins/Del versus Del/Del) (odds ratio = 0.33, 95% confidence interval = 0.14-0.81, z = 2.41, P = 0.02) in Chinese Han but not in Caucasian, Japanese or India populations. Our results indicate that -141C Ins/Del polymorphism might be a susceptibility factor for schizophrenia in Chinese Han population.
Collapse
Affiliation(s)
- Xiaofeng Zhao
- Clinical Pharmacology Base, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yinglin Huang
- Department of Psychiatry, Shengjing Hospital of China Medical University, Shenyang, China
| | - Kaiyuan Chen
- Mental Health Center, Shantou University Medical College, Shantou, China
| | - Duolu Li
- Clinical Pharmacology Base, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Chao Han
- Clinical Pharmacology Base, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Quancheng Kan
- Clinical Pharmacology Base, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| |
Collapse
|
19
|
Cargnin S, Massarotti A, Terrazzino S. BDNF Val66Met and clinical response to antipsychotic drugs: A systematic review and meta-analysis. Eur Psychiatry 2016; 33:45-53. [PMID: 26854986 DOI: 10.1016/j.eurpsy.2015.12.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 12/01/2015] [Accepted: 12/03/2015] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND The polymorphic brain-derived neurotrophic factor (BDNF) gene has been postulated to be involved in inter-individual variability response to antipsychotic drugs. PURPOSE To perform a qualitative and quantitative synthesis of studies evaluating the influence of BDNF genetic variation on clinical response to antipsychotics. METHODS The review protocol was published in the PROSPERO database (Reg. n(o) CRD42015024614). A comprehensive search was performed through PubMed, Web of Knowledge and Cochrane databases up to July 2015. The methodological quality of identified studies was assessed using the MINORS criteria. Publication bias was estimated and potential sources of heterogeneity were investigated via meta-regression, subgroup and sensitivity analyses. RESULTS Nine studies including a total of 2461 antipsychotic-treated patients fulfilled inclusion criteria for meta-analysis of BDNF Val66Met. Using the random-effects model, the pooled results showed no significant association with antipsychotic response for the dominant (Met carriers vs Val/Val, OR: 0.93, 95% CI: 0.72-1.19, P=0.55), codominant (Met/Met vs Val/Val, OR: 0.82, 95% CI: 0.59-1.15, P=0.25), recessive (Met/Met vs Val carriers, OR: 0.81, 95% CI 0.60-1.10, P=0.18) or the allelic contrast (Met vs Val, OR: 0.92, 95% CI 0.76-1.10, P=0.34). Visual inspection of funnel plots and further evaluation with Egger's test did not suggest evidence of publication bias. Despite lack of significant heterogeneity in most comparisons, no evidence of association also emerged in the subgroup and sensitivity analyses conducted. CONCLUSION The present meta-analysis excludes a clinically relevant effect of BDNF Val66Met on antipsychotic drug response per se. Nevertheless, further investigation is still needed to clarify in well-designed, large sample-based studies, the impact of BDNF haplotypes containing the Val66Met polymorphism.
Collapse
Affiliation(s)
- S Cargnin
- Dipartimento di Scienze del Farmaco and Centro di Ricerca Interdipartimentale di Farmacogenetica e Farmacogenomica (CRIFF), Università del Piemonte Orientale "A. Avogadro", Largo Donegani 2, 28100 Novara, Italy
| | - A Massarotti
- Dipartimento di Scienze del Farmaco and Centro di Ricerca Interdipartimentale di Farmacogenetica e Farmacogenomica (CRIFF), Università del Piemonte Orientale "A. Avogadro", Largo Donegani 2, 28100 Novara, Italy
| | - S Terrazzino
- Dipartimento di Scienze del Farmaco and Centro di Ricerca Interdipartimentale di Farmacogenetica e Farmacogenomica (CRIFF), Università del Piemonte Orientale "A. Avogadro", Largo Donegani 2, 28100 Novara, Italy.
| |
Collapse
|
20
|
Zhang XY, Chen DC, Tan YL, Tan SP, Luo X, Zuo L, Soares JC. BDNF polymorphisms are associated with schizophrenia onset and positive symptoms. Schizophr Res 2016; 170:41-7. [PMID: 26603468 DOI: 10.1016/j.schres.2015.11.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 11/07/2015] [Accepted: 11/10/2015] [Indexed: 12/22/2022]
Abstract
Numerous studies have showed that brain-derived neurotrophic factor (BDNF) may be involved in the pathogenesis and pathophysiology of schizophrenia. The purposes of this study were to investigate the potential association of BDNF gene polymorphisms with susceptibility to schizophrenia and the psychopathological symptoms in patients with schizophrenia in a Han Chinese population. Four polymorphisms (rs6265, rs12273539, rs10835210 and rs2030324) of the BDNF gene were analyzed in a case-control study of 1887 Han Chinese individuals (844 patients and 1043 controls). We assessed 825 patients for psychopathology using the Positive and Negative Syndrome Scale. In single marker analyses the BDNF rs10835210 mutant A allele was significantly associated with schizophrenia. Haplotype analyses revealed higher frequencies of haplotypes containing the mutant A allele of the rs10835210 in schizophrenia than controls. We also found that this polymorphism rs10835210 was associated with positive symptoms, and the patients carrying the mutational allele A showed more positive symptoms. These findings suggest the role of these BDNF gene variants in both susceptibility to schizophrenia and in clinical symptom severity.
Collapse
Affiliation(s)
- Xiang Yang Zhang
- Psychiatry Research Center, Beijing HuiLongGuan Hospital, Peking University, Beijing, China; Department of Psychiatry and Behavioral Sciences, Harris County Psychiatric Center, The University of Texas Health Science Center at Houston, Houston, TX, USA.
| | - Da-Chun Chen
- Psychiatry Research Center, Beijing HuiLongGuan Hospital, Peking University, Beijing, China
| | - Yun-Long Tan
- Psychiatry Research Center, Beijing HuiLongGuan Hospital, Peking University, Beijing, China
| | - Shu-Ping Tan
- Psychiatry Research Center, Beijing HuiLongGuan Hospital, Peking University, Beijing, China
| | - Xingguang Luo
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - Lingjun Zuo
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - Jair C Soares
- Department of Psychiatry and Behavioral Sciences, Harris County Psychiatric Center, The University of Texas Health Science Center at Houston, Houston, TX, USA
| |
Collapse
|