1
|
Singh P, Srivastava A, Guin D, Thakran S, Yadav J, Chandna P, Sood M, Chadda RK, Kukreti R. Genetic Landscape of Major Depressive Disorder: Assessment of Potential Diagnostic and Antidepressant Response Markers. Int J Neuropsychopharmacol 2023; 26:692-738. [PMID: 36655406 PMCID: PMC10586057 DOI: 10.1093/ijnp/pyad001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 01/18/2023] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND The clinical heterogeneity in major depressive disorder (MDD), variable treatment response, and conflicting findings limit the ability of genomics toward the discovery of evidence-based diagnosis and treatment regimen. This study attempts to curate all genetic association findings to evaluate potential variants for clinical translation. METHODS We systematically reviewed all candidates and genome-wide association studies for both MDD susceptibility and antidepressant response, independently, using MEDLINE, particularly to identify replicated findings. These variants were evaluated for functional consequences using different in silico tools and further estimated their diagnostic predictability by calculating positive predictive values. RESULTS A total of 217 significantly associated studies comprising 1200 variants across 545 genes and 128 studies including 921 variants across 412 genes were included with MDD susceptibility and antidepressant response, respectively. Although the majority of associations were confirmed by a single study, we identified 31 and 18 replicated variants (in at least 2 studies) for MDD and antidepressant response. Functional annotation of these 31 variants predicted 20% coding variants as deleterious/damaging and 80.6% variants with regulatory effect. Similarly, the response-related 18 variants revealed 25% coding variant as damaging and 88.2% with substantial regulatory potential. Finally, we could calculate the diagnostic predictability of 19 and 5 variants whose positive predictive values ranges from 0.49 to 0.66 for MDD and 0.36 to 0.66 for response. CONCLUSIONS The replicated variants presented in our data are promising for disease diagnosis and improved response outcomes. Although these quantitative assessment measures are solely directive of available observational evidence, robust homogenous validation studies are required to strengthen these variants for molecular diagnostic application.
Collapse
Affiliation(s)
- Priyanka Singh
- Genomics and Molecular Medicine Unit, Council of Scientific and Industrial Research (CSIR) - Institute of Genomics and Integrative Biology (IGIB), New Delhi, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Ankit Srivastava
- Genomics and Molecular Medicine Unit, Council of Scientific and Industrial Research (CSIR) - Institute of Genomics and Integrative Biology (IGIB), New Delhi, India
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Debleena Guin
- Genomics and Molecular Medicine Unit, Council of Scientific and Industrial Research (CSIR) - Institute of Genomics and Integrative Biology (IGIB), New Delhi, India
- Department of Biotechnology, Delhi Technological University, Shahbad Daulatpur, Delhi, India
| | - Sarita Thakran
- Genomics and Molecular Medicine Unit, Council of Scientific and Industrial Research (CSIR) - Institute of Genomics and Integrative Biology (IGIB), New Delhi, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Jyoti Yadav
- Genomics and Molecular Medicine Unit, Council of Scientific and Industrial Research (CSIR) - Institute of Genomics and Integrative Biology (IGIB), New Delhi, India
| | - Puneet Chandna
- Indian Society of Colposcopy and Cervical Pathology (ISCCP), Safdarjung Hospital, New Delhi, India
| | - Mamta Sood
- Department of Psychiatry, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Rakesh Kumar Chadda
- Department of Psychiatry, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Ritushree Kukreti
- Genomics and Molecular Medicine Unit, Council of Scientific and Industrial Research (CSIR) - Institute of Genomics and Integrative Biology (IGIB), New Delhi, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| |
Collapse
|
2
|
Chen L, Ye T, Wang X, Han L, Wang T, Qi D, Cheng X. The Mechanisms Underlying the Pharmacological Effects of GuiPi Decoction on Major Depressive Disorder based on Network Pharmacology and Molecular Docking. Comb Chem High Throughput Screen 2023; 26:1701-1728. [PMID: 36045534 DOI: 10.2174/1386207325666220831152959] [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: 02/14/2022] [Revised: 06/12/2022] [Accepted: 07/16/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND AND AIM Major Depressive Disorder (MDD) is a common affective disorder. GuiPi decoction (GPD) is used to treat depression in China, Japan, and Korea. However, its effective ingredients and antidepressant mechanisms remain unclear. We attempted to reveal the potential mechanisms of GPD in the treatment of MDD by network pharmacology and molecular docking. In addition, we conducted an enzymatic activity assay to validate the results of molecular docking. METHODS GPD-related compounds and targets, and MDD-related targets were retrieved from databases and literature. The herb-compound-target network was constructed by Cytoscape. The protein- protein interaction network was built using the STRING database to find key targets of GPD on MDD. Enrichment analysis of shared targets was analyzed by MetaCore database to obtain the potential pathway and biological process of GPD on MDD. The main active compounds treating MDD were screened by molecular docking. The PDE4s inhibitors were screened and verified by an enzyme activity assay. RESULTS GPD contained 1222 ingredients and 190 potential targets for anti-MDD. Possible biological processes regulated by GPD were neurophysiological processes, blood vessel morphogenesis, Camp Responsive Element Modulator (CREM) pathway, and Androgen Receptor (AR) signaling crosstalk in MDD. Potential pathways in MDD associated with GPD include neurotransmission, cell differentiation, androgen signaling, and estrogen signaling. Fumarine, m-cresol, quercetin, betasitosterol, fumarine, taraxasterol, and lupeol in GPD may be the targets of SLC6A4, monoamine oxidase A (MAOA), DRD2, OPRM1, HTR3A, Albumin (ALB), and NTRK1, respectively. The IC50 values of trifolin targeting Phosphodiesterase (PDE) 4A and girinimbine targeting PDE4B1 were 73.79 μM and 31.86 μM, respectively. The IC50 values of girinimbine and benzo[a]carbazole on PDE4B2 were 51.62 μM and 94.61 μM, respectively. CONCLUSION Different compounds in GPD may target the same protein, and the same component in GPD can target multiple targets. These results suggest that the effects of GPD on MDD are holistic and systematic, unlike the pattern of one drug-one target.
Collapse
Affiliation(s)
- Liyuan Chen
- Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Tianyuan Ye
- Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Xiaolong Wang
- Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Lu Han
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
| | - Tongxing Wang
- GeneNet Pharmaceuticals Co. Ltd., Tianjin 300410, China
| | - Dongmei Qi
- Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Xiaorui Cheng
- Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| |
Collapse
|
3
|
Hirtz R, Libuda L, Hinney A, Föcker M, Bühlmeier J, Holterhus PM, Kulle A, Kiewert C, Kuhnert R, Cohrdes C, Peters T, Hebebrand J, Grasemann C. Age at menarche relates to depression in adolescent girls: Comparing a clinical sample to the general pediatric population. J Affect Disord 2022; 318:103-112. [PMID: 36058357 DOI: 10.1016/j.jad.2022.08.092] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 08/23/2022] [Accepted: 08/25/2022] [Indexed: 11/15/2022]
Abstract
CONTEXT The timing of puberty, physical features of pubertal development, and hormones are closely intertwined but may also individually contribute to the risk for depression and depression severity. Additionally, their effects on mood may depend on depression severity, but previously this has only been studied in mostly subclinical depression. METHODS In 184 girls from a single psychiatric hospital with significant depressive symptoms (Beck Depression Inventory-II score > 13), the relationship between depression severity and age at menarche (AAM), pubertal status, and gonadal/adrenal hormones (estradiol, progesterone, DHEA-S, androstenedione, testosterone, dihydrotestosterone) was investigated. Moreover, AAM in depressed girls was compared to that from a representative sample of German adolescents without a psychiatric disorder (N = 1674). Androgen levels were compared to those of age- and sex-matched controls (N = 59). RESULTS AAM but not pubertal stage or biochemical parameters related to depression. Girls with AAM at the lower normative range of pubertal development were 61 % more likely to develop depression and scored 4.9 points higher on the depression scale than girls experiencing menarche at the population average. Androstenedione levels were increased in the psychiatric sample, but neither androgen nor gonadal hormone levels were associated with depression severity. LIMITATIONS The study is cross-sectional. CONCLUSIONS These observations confirm previous studies in mostly subclinical depression and highlight the importance of AAM for adolescent depression. Thus, AAM could be considered a prognostic factor for a clinical risk score assessing the probability of adolescent depression. Moreover, these findings suggest fostering efforts that address risk factors that contribute to an earlier AAM.
Collapse
Affiliation(s)
- Raphael Hirtz
- Division of Pediatric Endocrinology and Diabetology, Department of Pediatrics II, University Hospital Essen, University of Duisburg-Essen, Hufelandstr 55, 40211 Essen, Germany; Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Essen, University of Duisburg-Essen, Wickenburgstr 21, 40211 Essen, Germany.
| | - Lars Libuda
- Institute of Nutrition, Consumption and Health, Faculty of Natural Sciences, University Paderborn, Warbuger Str. 100, 33098 Paderborn, Germany
| | - Anke Hinney
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Essen, University of Duisburg-Essen, Wickenburgstr 21, 40211 Essen, Germany
| | - Manuel Föcker
- Department of Child and Adolescent Psychiatry, University Hospital Münster, Schmeddingstr 50, 48149 Münster, Germany
| | - Judith Bühlmeier
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Essen, University of Duisburg-Essen, Wickenburgstr 21, 40211 Essen, Germany
| | - Paul-Martin Holterhus
- Department of Pediatrics I, Pediatric Endocrinology and Diabetes, University Hospital of Schleswig-Holstein, UKSH, Campus Kiel, and Christian-Albrechts University, Arnold-Heller-Str. 3, 24105 Kiel, Germany
| | - Alexandra Kulle
- Department of Pediatrics I, Pediatric Endocrinology and Diabetes, University Hospital of Schleswig-Holstein, UKSH, Campus Kiel, and Christian-Albrechts University, Arnold-Heller-Str. 3, 24105 Kiel, Germany
| | - Cordula Kiewert
- Division of Pediatric Endocrinology and Diabetology, Department of Pediatrics II, University Hospital Essen, University of Duisburg-Essen, Hufelandstr 55, 40211 Essen, Germany
| | - Ronny Kuhnert
- Department of Epidemiology and Health Monitoring, Robert Koch Institute, Berlin, Germany, General-Pape-Str. 62-66, 12101 Berlin
| | - Caroline Cohrdes
- Department of Epidemiology and Health Monitoring, Robert Koch Institute, Berlin, Germany, General-Pape-Str. 62-66, 12101 Berlin
| | - Triinu Peters
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Essen, University of Duisburg-Essen, Wickenburgstr 21, 40211 Essen, Germany
| | - Johannes Hebebrand
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Essen, University of Duisburg-Essen, Wickenburgstr 21, 40211 Essen, Germany
| | - Corinna Grasemann
- Department of Pediatrics, Division of Rare Diseases and CeSER, St. Josef-Hospital, Ruhr-University Bochum, Alexandrinenstr 5, 44791 Bochum, Germany
| |
Collapse
|
4
|
Walsh MJM, Wallace GL, Gallegos SM, Braden BB. Brain-based sex differences in autism spectrum disorder across the lifespan: A systematic review of structural MRI, fMRI, and DTI findings. Neuroimage Clin 2021; 31:102719. [PMID: 34153690 PMCID: PMC8233229 DOI: 10.1016/j.nicl.2021.102719] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 06/02/2021] [Accepted: 06/03/2021] [Indexed: 12/12/2022]
Abstract
Females with autism spectrum disorder (ASD) have been long overlooked in neuroscience research, but emerging evidence suggests they show distinct phenotypic trajectories and age-related brain differences. Sex-related biological factors (e.g., hormones, genes) may play a role in ASD etiology and have been shown to influence neurodevelopmental trajectories. Thus, a lifespan approach is warranted to understand brain-based sex differences in ASD. This systematic review on MRI-based sex differences in ASD was conducted to elucidate variations across the lifespan and inform biomarker discovery of ASD in females We identified articles through two database searches. Fifty studies met criteria and underwent integrative review. We found that regions expressing replicable sex-by-diagnosis differences across studies overlapped with regions showing sex differences in neurotypical cohorts. Furthermore, studies investigating age-related brain differences across a broad age-span suggest distinct neurodevelopmental patterns in females with ASD. Qualitative comparison across youth and adult studies also supported this hypothesis. However, many studies collapsed across age, which may mask differences. Furthermore, accumulating evidence supports the female protective effect in ASD, although only one study examined brain circuits implicated in "protection." When synthesized with the broader literature, brain-based sex differences in ASD may come from various sources, including genetic and endocrine processes involved in brain "masculinization" and "feminization" across early development, puberty, and other lifespan windows of hormonal transition. Furthermore, sex-related biology may interact with peripheral processes, in particular the stress axis and brain arousal system, to produce distinct neurodevelopmental patterns in males and females with ASD. Future research on neuroimaging-based sex differences in ASD would benefit from a lifespan approach in well-controlled and multivariate studies. Possible relationships between behavior, sex hormones, and brain development in ASD remain largely unexamined.
Collapse
Affiliation(s)
- Melissa J M Walsh
- College of Health Solutions, Arizona State University, 975 S. Myrtle Ave, Tempe, AZ 85281, USA
| | - Gregory L Wallace
- Department of Speech, Language, and Hearing Sciences, The George Washington University, 2115 G St. NW, Washington, DC 20052, USA.
| | - Stephen M Gallegos
- College of Health Solutions, Arizona State University, 975 S. Myrtle Ave, Tempe, AZ 85281, USA
| | - B Blair Braden
- College of Health Solutions, Arizona State University, 975 S. Myrtle Ave, Tempe, AZ 85281, USA.
| |
Collapse
|
5
|
Tan GCY, Chu C, Lee YT, Tan CCK, Ashburner J, Wood NW, Frackowiak RS. The influence of microsatellite polymorphisms in sex steroid receptor genes ESR1, ESR2 and AR on sex differences in brain structure. Neuroimage 2020; 221:117087. [PMID: 32593802 PMCID: PMC8960998 DOI: 10.1016/j.neuroimage.2020.117087] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/11/2020] [Accepted: 06/22/2020] [Indexed: 12/04/2022] Open
Abstract
The androgen receptor (AR), oestrogen receptor alpha (ESR1) and oestrogen receptor beta (ESR2) play essential roles in mediating the effect of sex hormones on sex differences in the brain. Using Voxel-based morphometry (VBM) and gene sizing in two independent samples (discovery n = 173, replication = 61), we determine the common and unique influences on brain sex differences in grey (GM) and white matter (WM) volume between repeat lengths (n) of microsatellite polymorphisms AR(CAG)n, ESR1(TA)n and ESR2(CA)n. In the hypothalamus, temporal lobes, anterior cingulate cortex, posterior insula and prefrontal cortex, we find increased GM volume with increasing AR(CAG)n across sexes, decreasing ESR1(TA)n across sexes and decreasing ESR2(CA)n in females. Uniquely, AR(CAG)n was positively associated with dorsolateral prefrontal and orbitofrontal GM volume and the anterior corona radiata, left superior fronto-occipital fasciculus, thalamus and internal capsule WM volume. ESR1(TA)n was negatively associated with the left superior corona radiata, left cingulum and left inferior longitudinal fasciculus WM volume uniquely. ESR2(CA)n was negatively associated with right fusiform and posterior cingulate cortex uniquely. We thus describe the neuroanatomical correlates of three microsatellite polymorphisms of steroid hormone receptors and their relationship to sex differences. Microsatellite polymorphisms in sex hormone receptor genes influence volume in regions of brain sex difference AR(CAG)n repeat length is positively associated with grey and white matter volume across males and females ESR1(TA)n repeat length is negatively associated with grey and white matter volume across males and females ESR2(CA)n repeat length is negatively associated with grey matter volume in females but not in males Repeat length was associated with volume in the hypothalamus, insula, temporal cortices, prefrontal cortices, inferior and superior longitudinal fasciculi in the three genes. These regions were largely replicated in an independent cohort acquired on a separate scanner.
Collapse
Affiliation(s)
- Geoffrey Chern-Yee Tan
- Institute of Mental Health, National Healthcare Group, Singapore; Clinical Imaging Research Centre, National University of Singapore, Singapore; Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research (A(∗)STAR), Singapore.
| | - Carlton Chu
- DeepMind Technologies Limited, United Kingdom, UK
| | - Yu Teng Lee
- University of Sydney, Sydney, NSW, Australia
| | | | - John Ashburner
- Wellcome Centre for Human Neuroimaging, University College London (UCL), United Kingdom, UK
| | | | | |
Collapse
|
6
|
Xu W, Yu J, Li S, Xu J. Depressive behavior induced by nonylphenol and its effect on the expression of ER-α and ER-β in nerve cells of rats. J Affect Disord 2020; 263:373-381. [PMID: 31969267 DOI: 10.1016/j.jad.2019.12.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/04/2019] [Accepted: 12/05/2019] [Indexed: 01/09/2023]
Abstract
OBJECTIVE To investigate the effects of nonylphenol (NP) exposure on the depressive behavior in rats, and the effects of the expressions of estrogen receptor-α (ER-α) and estrogen receptor-β (ER-β) in nerve cells in vivo and vitro. METHODS Forty male SD rats were randomly divided into 4 groups: blank control group (0 mg/kg), low dose group (0.4 mg/kg), middle dose group (4 mg/kg) and high dose group (40 mg/kg), which were exposed to NP for 180 days. The exposure dose of NP in HT22 was 20μM, which was divided into4 groups: blank control group, NP group, ICI182780 group and ICI182780+NP group. RESULTS In vivo, in the open field experiment, the number of entries in the central area and duration of attention in central square decreased gradually in the NP high dose group compared with the control (F = 3.561, p = .029). In forced swimming experiment, with the increase of NP dose, the immobility time increased, and the increasing degree of middle dose group and high dose group was higher than that of the low dose group (F = 3.047, p = .048). The concentrations of serum dopamine (DA) in the middle dose and high dose groups decreased greatly compared with the control (F = 3.967, p = .023). NP exposure at the doses of 4 mg/kg and 40 mg/kg induced an increase in the level of serum corticosterone compared to the control (F = 11.536, p<.001). Compared with the control group, the expression of ER-β decreased gradually with an increase of NP dose in the NP treatment groups (F = 4.513, p = .014). In vitro, the activity of HT22 cells decreased with an increase of NP dose (F = 316.6, p<.001). When the dose of NP was 200 μM, the growth inhibition rate of HT22 cells was (0.54±0.11)%. The expression levels of ER-α and ER-β in ICI182780+NP group was lower than those in the control and ICI182780 groups, but higher than those in the NP group (F = 1.592, p=.266; F = 10.166, p=.004). CONCLUSION Long-term exposure to NP could induce the alterations in depressive behavior, and the levels of neurotransmitters as well as the expression of ER in the hippocampus of rats. Moreover, NP could reduce the activity of HT22 cells and decrease the expression levels of ER-α and ER-β in vitro.
Collapse
Affiliation(s)
- Weihong Xu
- School of Public Health, Zunyi Medical University, Zunyi, Guizhou, 563000, China
| | - Jie Yu
- School of Public Health, Zunyi Medical University, Zunyi, Guizhou, 563000, China.
| | - Shengnan Li
- School of Public Health, Zunyi Medical University, Zunyi, Guizhou, 563000, China
| | - Jie Xu
- School of Public Health, Zunyi Medical University, Zunyi, Guizhou, 563000, China.
| |
Collapse
|
7
|
Owens SJ, Purves-Tyson TD, Webster MJ, Shannon Weickert C. Evidence for enhanced androgen action in the prefrontal cortex of people with bipolar disorder but not schizophrenia or major depressive disorder. Psychiatry Res 2019; 280:112503. [PMID: 31446215 DOI: 10.1016/j.psychres.2019.112503] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 07/30/2019] [Accepted: 07/31/2019] [Indexed: 01/24/2023]
Abstract
Anxiety and depressive disorders are more prevalent in hypogonadal men. Low testosterone levels are associated with greater negative symptoms and impaired cognition in men with schizophrenia. Thus, androgens may contribute to brain pathophysiology in psychiatric disorders. We investigated androgen-related mRNAs in post-mortem dorsolateral prefrontal cortex of psychiatric disorders. We also assessed androgen receptor (AR) CAG trinucleotide repeat length, a functional AR gene variant associated with AR gene expression, receptor activity, and circulating testosterone. AR CAG repeat length was determined from genomic DNA and AR and 5α-reductase mRNAs measured using quantitative PCR in schizophrenia, bipolar disorder and control cases [n = 35/group; Stanley Medical Research Institute (SMRI) Array collection]. Layer-specific AR gene expression was determined using in situ hybridisation in schizophrenia, bipolar disorder, major depressive disorder and control cases (n = 15/group; SMRI Neuropathology Consortium). AR mRNA was increased in bipolar disorder, but was unchanged in schizophrenia, relative to controls. AR and 5α-reductase mRNAs were significantly positively correlated in bipolar disorder. AR CAG repeat length was significantly shorter in bipolar disorder relative to schizophrenia. AR mRNA expression was highest in cortical layers IV and V, but no layer-specific diagnostic differences were detected. Together, our results suggest enhanced cortical androgen action in people with bipolar disorder.
Collapse
Affiliation(s)
- Samantha J Owens
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Randwick NSW 2031, Australia; School of Psychiatry, Faculty of Medicine, University of New South Wales, Sydney NSW 2052, Australia.
| | - Tertia D Purves-Tyson
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Randwick NSW 2031, Australia; School of Psychiatry, Faculty of Medicine, University of New South Wales, Sydney NSW 2052, Australia
| | - Maree J Webster
- Laboratory of Brain Research, Stanley Medical Research Institute, MD 20815, USA
| | - Cynthia Shannon Weickert
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Randwick NSW 2031, Australia; School of Psychiatry, Faculty of Medicine, University of New South Wales, Sydney NSW 2052, Australia; Department of Neuroscience & Physiology, Upstate Medical University, Syracuse, NY 13210, USA.
| |
Collapse
|
8
|
Owens SJ, Weickert TW, Purves-Tyson TD, Ji E, White C, Galletly C, Liu D, O'Donnell M, Shannon Weickert C. Sex-Specific Associations of Androgen Receptor CAG Trinucleotide Repeat Length and of Raloxifene Treatment with Testosterone Levels and Perceived Stress in Schizophrenia. MOLECULAR NEUROPSYCHIATRY 2019; 5:28-41. [PMID: 31019916 DOI: 10.1159/000495062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 11/01/2018] [Indexed: 12/25/2022]
Abstract
Lower testosterone levels are associated with greater negative symptoms in men with schizophrenia. Testosterone signals via androgen receptor (AR). A functional variant in the AR gene (CAG trinucleotide repeat polymorphism) is associated with circulating testosterone and mood-related symptoms in healthy people. Raloxifene increases testosterone in healthy males and reduces symptom severity and improves cognition in schizophrenia; however, whether raloxifene increases testosterone in men with schizophrenia is unknown. We assessed the interaction of a functional AR gene variant and adjunctive raloxifene on peripheral testosterone and symptom severity in schizophrenia. Patients with schizophrenia (59 males and 38 females) participated in a randomized, double-blind, placebo-controlled, crossover trial of adjunctive raloxifene (120 mg/day). Healthy adults (46 males and 41 females) were used for baseline comparison. Baseline circulating testosterone was decreased in male patients compared to male controls and positively correlated with CAG repeat length in male controls and female patients. Male patients with short, compared to long, CAG repeat length had higher stress scores. Raloxifene treatment increased testosterone in male patients, but was unrelated to AR CAG repeat length, suggesting that raloxifene's effects may not depend on AR activity. Sex-specific alterations of the relationship between AR CAG repeat length and testosterone suggest that altered AR activity may impact perceived stress in men with schizophrenia.
Collapse
Affiliation(s)
- Samantha J Owens
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Sydney, New South Wales, Australia.,School of Psychiatry, University of New South Wales, Sydney, New South Wales, Australia
| | - Thomas W Weickert
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Sydney, New South Wales, Australia.,School of Psychiatry, University of New South Wales, Sydney, New South Wales, Australia
| | - Tertia D Purves-Tyson
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Sydney, New South Wales, Australia.,School of Psychiatry, University of New South Wales, Sydney, New South Wales, Australia
| | - Ellen Ji
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Sydney, New South Wales, Australia.,School of Psychiatry, University of New South Wales, Sydney, New South Wales, Australia
| | - Christopher White
- Department of Endocrinology, Prince of Wales Hospital, Randwick, New South Wales, Australia
| | - Cherrie Galletly
- Discipline of Psychiatry, School of Medicine, University of Adelaide, Adelaide, South Australia, Australia.,Northern Adelaide Local Health Network, Adelaide, South Australia, Australia
| | - Dennis Liu
- Discipline of Psychiatry, School of Medicine, University of Adelaide, Adelaide, South Australia, Australia.,Northern Adelaide Local Health Network, Adelaide, South Australia, Australia
| | - Maryanne O'Donnell
- School of Psychiatry, University of New South Wales, Sydney, New South Wales, Australia
| | - Cynthia Shannon Weickert
- Schizophrenia Research Laboratory, Neuroscience Research Australia, Sydney, New South Wales, Australia.,School of Psychiatry, University of New South Wales, Sydney, New South Wales, Australia.,Department of Neuroscience and Physiology, Upstate Medical University, Syracuse, New York, USA
| |
Collapse
|
9
|
Tan EC, Lim HW, Chua TE, Tan HS, Lee TM, Chen HY. Investigation of variants in estrogen receptor genes and perinatal depression. Neuropsychiatr Dis Treat 2018; 14:919-925. [PMID: 29636617 PMCID: PMC5880413 DOI: 10.2147/ndt.s160424] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
OBJECTIVES Depressive symptoms are common during pregnancy and after childbirth. Estrogen levels fluctuate greatly during the course of pregnancy and may contribute to mood instability. The first aim of this case-control study was to investigate whether variants in the two estrogen receptor genes might contribute to the genetic susceptibility to pregnancy-related depression using controls that were screened for postnatal depression. The second aim was to uncover new variants in the two estrogen receptor genes. PATIENTS AND METHODS Our study sample comprised 554 control subjects who had Edinburgh Postnatal Depression Scale (EPDS) scores below 7 at postnatal screening, and 159 patients with clinically diagnosed pregnancy-related depression. They were genotyped for four single-nucleotide polymorphisms (SNPs) and a dinucleotide repeat in the two genes: estrogen receptor α (ESR1) and estrogen receptor β (ESR2). Fifty-six cases with personal and/or family history of depression of psychiatric disorders were selected for resequencing of the two genes. RESULTS There was no statistically significant association with perinatal depression for all five variants. However, there was a trend toward higher frequencies of the genotypes associated with higher risk of depression for rs2077647 and rs4986938 in the case group. From resequencing, two novel ESR1 variants were identified from two different patients. CONCLUSION Our study that used screened controls with low EPDS scores and cases with clinically diagnosed pregnancy-related depression could not replicate the association with depression for any of the SNPs for both genotype and allele frequencies. Two novel SNPs were identified and could be further investigated in a larger sample set.
Collapse
Affiliation(s)
- Ene-Choo Tan
- KK Research Centre, KK Women's and Children's Hospital, Singapore, Singapore.,Paediatrics Academic Clinical Programme, SingHealth Duke-NUS Medical School, Singapore, Singapore
| | - Hwee-Woon Lim
- KK Research Centre, KK Women's and Children's Hospital, Singapore, Singapore
| | - Tze-Ern Chua
- Paediatrics Academic Clinical Programme, SingHealth Duke-NUS Medical School, Singapore, Singapore.,Department of Psychological Medicine, KK Women's and Children's Hospital, Singapore, Singapore
| | - Hui-San Tan
- KK Research Centre, KK Women's and Children's Hospital, Singapore, Singapore
| | - Theresa My Lee
- Paediatrics Academic Clinical Programme, SingHealth Duke-NUS Medical School, Singapore, Singapore.,Department of Psychological Medicine, KK Women's and Children's Hospital, Singapore, Singapore
| | - Helen Y Chen
- Paediatrics Academic Clinical Programme, SingHealth Duke-NUS Medical School, Singapore, Singapore.,Department of Psychological Medicine, KK Women's and Children's Hospital, Singapore, Singapore
| |
Collapse
|
10
|
Maney DL. Polymorphisms in sex steroid receptors: From gene sequence to behavior. Front Neuroendocrinol 2017; 47:47-65. [PMID: 28705582 PMCID: PMC6312198 DOI: 10.1016/j.yfrne.2017.07.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 07/05/2017] [Accepted: 07/08/2017] [Indexed: 01/09/2023]
Abstract
Sex steroid receptors have received much interest as potential mediators of human behaviors and mental disorders. Candidate gene association studies have identified about 50 genetic variants of androgen and estrogen receptors that correlate with human behavioral phenotypes. Because most of these polymorphisms lie outside coding regions, discerning their effect on receptor function is not straightforward. Thus, although discoveries of associations improve our ability to predict risk, they have not greatly advanced our understanding of underlying mechanisms. This article is intended to serve as a starting point for psychologists and other behavioral biologists to consider potential mechanisms. Here, I review associations between polymorphisms in sex steroid receptors and human behavioral phenotypes. I then consider ways in which genetic variation can affect processes such as mRNA transcription, splicing, and stability. Finally, I suggest ways that hypotheses about mechanism can be tested, for example using in vitro assays and/or animal models.
Collapse
Affiliation(s)
- Donna L Maney
- Department of Psychology, 36 Eagle Row, Emory University, Atlanta, GA 30322, USA.
| |
Collapse
|
11
|
Papale LA, Li S, Madrid A, Zhang Q, Chen L, Chopra P, Jin P, Keleş S, Alisch RS. Sex-specific hippocampal 5-hydroxymethylcytosine is disrupted in response to acute stress. Neurobiol Dis 2016; 96:54-66. [PMID: 27576189 DOI: 10.1016/j.nbd.2016.08.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 08/18/2016] [Accepted: 08/23/2016] [Indexed: 01/18/2023] Open
Abstract
Environmental stress is among the most important contributors to increased susceptibility to develop psychiatric disorders. While it is well known that acute environmental stress alters gene expression, the molecular mechanisms underlying these changes remain largely unknown. 5-hydroxymethylcytosine (5hmC) is a novel environmentally sensitive epigenetic modification that is highly enriched in neurons and is associated with active neuronal transcription. Recently, we reported a genome-wide disruption of hippocampal 5hmC in male mice following acute stress that was correlated to altered transcript levels of genes in known stress related pathways. Since sex-specific endocrine mechanisms respond to environmental stimulus by altering the neuronal epigenome, we examined the genome-wide profile of hippocampal 5hmC in female mice following exposure to acute stress and identified 363 differentially hydroxymethylated regions (DhMRs) linked to known (e.g., Nr3c1 and Ntrk2) and potentially novel genes associated with stress response and psychiatric disorders. Integration of hippocampal expression data from the same female mice found stress-related hydroxymethylation correlated to altered transcript levels. Finally, characterization of stress-induced sex-specific 5hmC profiles in the hippocampus revealed 778 sex-specific acute stress-induced DhMRs some of which were correlated to altered transcript levels that produce sex-specific isoforms in response to stress. Together, the alterations in 5hmC presented here provide a possible molecular mechanism for the adaptive sex-specific response to stress that may augment the design of novel therapeutic agents that will have optimal effectiveness in each sex.
Collapse
Affiliation(s)
- Ligia A Papale
- Department of Psychiatry, University of Wisconsin, Madison, WI, USA
| | - Sisi Li
- Department of Psychiatry, University of Wisconsin, Madison, WI, USA; Neuroscience Training Program, University of Wisconsin, Madison, WI, USA
| | - Andy Madrid
- Department of Psychiatry, University of Wisconsin, Madison, WI, USA; Neuroscience Training Program, University of Wisconsin, Madison, WI, USA
| | - Qi Zhang
- Department of Statistics, University of Nebraska, Lincoln, NE, USA
| | - Li Chen
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, USA
| | - Pankaj Chopra
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, USA
| | - Peng Jin
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, USA
| | - Sündüz Keleş
- Department of Statistics, Biostatistics, and Medical Informatics, University of Wisconsin, Madison, WI, USA
| | - Reid S Alisch
- Department of Psychiatry, University of Wisconsin, Madison, WI, USA.
| |
Collapse
|
12
|
Xia L, Yao S. The Involvement of Genes in Adolescent Depression: A Systematic Review. Front Behav Neurosci 2015; 9:329. [PMID: 26733829 PMCID: PMC4685064 DOI: 10.3389/fnbeh.2015.00329] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 11/14/2015] [Indexed: 01/20/2023] Open
Abstract
Numerous studies have reported on the roles of genetic factors in the development of depression in adolescents and young adults. However, there are few systematic reviews that update our understanding of adolescent depression with the biological findings identifying the roles of gene expression and/or polymorphism(s). This review systematically summarized the findings that clearly identified the contribution of a gene to the risk of depression in adolescents between the ages of 10 and 19 years old and young adults between the ages of 20 and 25 years old. Data were obtained through searching PubMed, Embase, and Web of Science. A total of 47 studies on early adolescence and three studies on young adults were included in the current review. Most articles studied genes in the serotonergic system (n = 26), dopaminergic system (n = 3), and the Brain-derived neurotropic factor (BDNF) gene (n = 12). 92.3% of studies (24/26) identified positive associations of 5-HTTLPR polymorphism with depressive illness or depressive symptoms. 83.3% of studies (10/12) found positive association between BDNF Val66Met genotype and adolescent depressive symptoms. More studies should be conducted on the 18 genes reported in a few studies to clarify their roles in the risk for adolescent depression.
Collapse
Affiliation(s)
- Liangwei Xia
- Medical Psychological Institute, Second Xiangya Hospital, Central South University Changsha, Hunan, China
| | - Shuqiao Yao
- Medical Psychological Institute, Second Xiangya Hospital, Central South UniversityChangsha, Hunan, China; National Technology Institute of PsychiatryChangsha, Hunan, China
| |
Collapse
|
13
|
|
14
|
Bosker FJ, Hartman CA, Nolte IM, Prins BP, Terpstra P, Posthuma D, van Veen T, Willemsen G, DeRijk RH, de Geus EJ, Hoogendijk WJ, Sullivan PF, Penninx BW, Boomsma DI, Snieder H, Nolen WA. Poor replication of candidate genes for major depressive disorder using genome-wide association data. Mol Psychiatry 2011; 16:516-32. [PMID: 20351714 DOI: 10.1038/mp.2010.38] [Citation(s) in RCA: 202] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Data from the Genetic Association Information Network (GAIN) genome-wide association study (GWAS) in major depressive disorder (MDD) were used to explore previously reported candidate gene and single-nucleotide polymorphism (SNP) associations in MDD. A systematic literature search of candidate genes associated with MDD in case-control studies was performed before the results of the GAIN MDD study became available. Measured and imputed candidate SNPs and genes were tested in the GAIN MDD study encompassing 1738 cases and 1802 controls. Imputation was used to increase the number of SNPs from the GWAS and to improve coverage of SNPs in the candidate genes selected. Tests were carried out for individual SNPs and the entire gene using different statistical approaches, with permutation analysis as the final arbiter. In all, 78 papers reporting on 57 genes were identified, from which 92 SNPs could be mapped. In the GAIN MDD study, two SNPs were associated with MDD: C5orf20 (rs12520799; P=0.038; odds ratio (OR) AT=1.10, 95% CI 0.95-1.29; OR TT=1.21, 95% confidence interval (CI) 1.01-1.47) and NPY (rs16139; P=0.034; OR C allele=0.73, 95% CI 0.55-0.97), constituting a direct replication of previously identified SNPs. At the gene level, TNF (rs76917; OR T=1.35, 95% CI 1.13-1.63; P=0.0034) was identified as the only gene for which the association with MDD remained significant after correction for multiple testing. For SLC6A2 (norepinephrine transporter (NET)) significantly more SNPs (19 out of 100; P=0.039) than expected were associated while accounting for the linkage disequilibrium (LD) structure. Thus, we found support for involvement in MDD for only four genes. However, given the number of candidate SNPs and genes that were tested, even these significant may well be false positives. The poor replication may point to publication bias and false-positive findings in previous candidate gene studies, and may also be related to heterogeneity of the MDD phenotype as well as contextual genetic or environmental factors.
Collapse
Affiliation(s)
- F J Bosker
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Grover S, Talwar P, Baghel R, Kaur H, Gupta M, Gourie-Devi M, Bala K, Sharma S, Kukreti R. Genetic variability in estrogen disposition: Potential clinical implications for neuropsychiatric disorders. Am J Med Genet B Neuropsychiatr Genet 2010; 153B:1391-410. [PMID: 20886541 DOI: 10.1002/ajmg.b.31119] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2010] [Accepted: 08/03/2010] [Indexed: 01/20/2023]
Abstract
Variability in the physiological levels of neuroactive estrogens is widely believed to play a role in predisposition to several disorders of the central nervous system. Local biosynthesis of estrogens in the brain as well as their circulating serum levels are known to contribute to this pool of neuroactive steroids. It has been well accepted that estrogens modulate neuronal functions by affecting genesis, differentiation, excitability, and degeneration of nerve cells. These actions of estrogens appear to be more prominent in females with higher concentrations and marked variability of circulating serum levels occurring over a woman's lifetime. However, our knowledge regarding the variability of neuroactive steroid levels is very limited. Furthermore, several studies have recently reported differences in the synchronization of circulating and neuronal levels of estradiol. In the absence of reliable circulating steroid levels, knowledge of genetic variability in estrogen disposition may play a determining factor in predicting altered susceptibility or severity of neuropsychiatric disorders in women. Over the past decade, several genetic variants have been linked to both differential serum estrogen levels and predisposition to diverse types of neuropsychiatric disorders in women. Polymorphisms in genes encoding estrogen-metabolizing enzymes as well as estrogen receptors may account for this phenotypic variability. In this review, we attempt to show the contribution of genetics in determining estrogenicity in females with a particular emphasis on the central nervous system. This knowledge will further provide a driving force for unearthing the novel field of "Estrogen Pharmacogenomics." © 2010 Wiley-Liss, Inc.
Collapse
Affiliation(s)
- Sandeep Grover
- Council of Scientific and Industrial Research, Institute of Genomics and Integrative Biology, Delhi, India
| | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Abstract
OBJECTIVE There are significant individual differences in the extent to which mood and cognition change as a function of reproductive stage, menstrual phase, postpartum, and hormone therapy use. This review explores the extent to which variations or polymorphisms in the estrogen receptor alpha gene (ESR1) predict cognitive and mood outcomes. METHODS A literature search was conducted from 1995 to November 2009 through PubMed, Embase, and PsychINFO. Twenty-five manuscripts that summarize investigations of ESR1 in mental health were reviewed. RESULTS Among studies investigating ESR1 in relation to cognition, 11 of 14 case-control studies reported an association between ESR1 polymorphisms and risk for developing dementia. Three of four prospective cohort studies reported an association between ESR1 polymorphisms and significant cognitive decline. There are inconsistencies between case-control and cohort studies regarding whether specific ESR1 alleles increase or decrease the risk for cognitive dysfunction. The relationships between ESR1 and cognitive impairment tend to be specific to or driven by women and restricted to risk for Alzheimer disease rather than other dementia causes. Three of five studies examining ESR1 polymorphisms in relation to anxiety or depressive symptoms found significant associations. Significant associations have also been reported between ESR1 polymorphisms and childhood-onset mood disorder and premenstrual dysphoric disorder. CONCLUSIONS A strong relationship between ESR1 variants and cognitive outcomes is evident, and preliminary evidence suggests a role of the ESR1 gene in certain mood outcomes. Insights into the discordant results will come from future studies that include haplotype analyses, analyses within specific ethnic/racial populations, and sex-stratified analyses.
Collapse
|
17
|
Walf AA, Koonce CJ, Frye CA. Estradiol or diarylpropionitrile decrease anxiety-like behavior of wildtype, but not estrogen receptor beta knockout, mice. Behav Neurosci 2009; 122:974-81. [PMID: 18823154 DOI: 10.1037/a0012749] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Clinical and basic studies demonstrate that estrogen (E-sub-2)-based therapies influence anxiety and mood, but the receptor targets (e.g., a or ss isoform of the estrogen receptor, ER) for these effects requires further investigation. To address the specificity of E2's anxiolytic-like effects through ERss, anxiety, motor, and nociceptive behavior of ovariectomized, wildtype (WT), and ERss knockout (ssERKO) mice was examined. Mice were administered oil vehicle or ER agonists, 17ss-E2 (E2; 0.1 mg/kg; similar affinity for ERa and ERss), and a selective ER modulator, diarylpropionitrile (DPN; 0.1 mg/kg; greater affinity for ERss than ERa). Performance of mice in anxiety (open field, elevated plus maze, elevated zero maze, social interaction), motor activity (activity monitor) and nociception (tailflick, pawlick) measures was compared. Results supported our hypothesis that ERss is important in modulation of anxiety-like behavior by E2 in some tasks. Administration of E2 or DPN to WT, but not ssERKO, mice increased open field central entries, plus maze open arm time, zero maze open quadrant time, and social interaction. This pattern was neither seen in motor activity nor pain threshold measures. Thus, actions of ERss may be important for modulating anxiety-like behavior of mice.
Collapse
Affiliation(s)
- Alicia A Walf
- Department of Psychology, University at Albany-State University of New York, USA
| | | | | |
Collapse
|
18
|
Wang SS, Kamphuis W, Huitinga I, Zhou JN, Swaab DF. Gene expression analysis in the human hypothalamus in depression by laser microdissection and real-time PCR: the presence of multiple receptor imbalances. Mol Psychiatry 2008; 13:786-99, 741. [PMID: 18427561 DOI: 10.1038/mp.2008.38] [Citation(s) in RCA: 201] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Hyperactivity of corticotropin-releasing factor (CRF) neurons in the paraventricular nucleus (PVN) of the hypothalamus is a prominent feature in depression and may be important in the etiology of this disease. The activity of the CRF neurons in the stress response is modulated by a number of factors that stimulate or inhibit CRF expression, including (1) corticosteroid receptors and their chaperones, heat shock proteins 70 and 90, (2) sex hormone receptors, (3) CRF receptors 1 (CRFR1) and 2, (4) cytokines interleukin 1-beta and tumor necrosis factor-alpha, (5) neuropeptides and receptors, vasopressin (AVP), AVP receptor 1a (AVPR1A) and oxytocin and (6) transcription factor cAMP-response element-binding protein. We hypothesized that, in depression, the transcript levels of those genes that are involved in the activation of the hypothalamo-pituitary-adrenal (HPA) axis are upregulated, whereas the transcript levels of the genes involved in the inhibition of the HPA axis are downregulated. We performed laser microdissection and real-time PCR in the PVN and as a control in the supraoptic nucleus. Snap-frozen post-mortem hypothalami of seven depressed and seven matched controls were used. We found significantly increased CRF mRNA levels in the PVN of the depressed patients. This was accompanied by a significantly increased expression of four genes that are involved in the activation of CRF neurons, that is, CRFR1, estrogen receptor-alpha, AVPR1A and mineralocorticoid receptor, while the expression of the androgen receptor mRNA involved in the inhibition of CRF neurons was decreased significantly. These findings raise the possibility that a disturbed balance in the production of receptors may contribute to the activation of the HPA axis in depression.
Collapse
Affiliation(s)
- S-S Wang
- Netherlands Institute for Neuroscience, Amsterdam, The Netherlands
| | | | | | | | | |
Collapse
|
19
|
Abstract
The genetic basis of major depressive disorder (MDD) has been investigated extensively, but the identification of MDD genes has been hampered by conflicting results from underpowered studies. We review all MDD case-control genetic association studies published before June 2007 and perform meta-analyses for polymorphisms that had been investigated in at least three studies. The study selection and data extraction were performed in duplicate by two independent investigators. The 183 papers that met our criteria studied 393 polymorphisms in 102 genes. Twenty-two polymorphisms (6%) were investigated in at least three studies. Seven polymorphisms had been evaluated in previous meta-analyses, 5 of these had new data available. Hence, we performed meta-analyses for 20 polymorphisms in 18 genes. Pooled odds ratios (ORs) with 95% confidence intervals (CIs) were calculated. Statistically significant associations were found for the APOE varepsilon2 (OR, 0.51), GNB3 825T (OR, 1.38), MTHFR 677T (OR, 1.20), SLC6A4 44 bp Ins/Del S (OR, 1.11) alleles and the SLC6A3 40 bpVNTR 9/10 genotype (OR, 2.06). To date, there is statistically significant evidence for six MDD susceptibility genes (APOE, DRD4, GNB3, MTHFR, SLC6A3 and SLC6A4).
Collapse
|