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Hackett J, Nadkarni V, Singh RS, Carthy CL, Antigua S, Hall BS, Rajadhyaksha AM. Repeat investigation during social preference behavior is suppressed in male mice with prefrontal cortex cacna1c (Ca v1.2)-deficiency through the dysregulation of neural dynamics. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.24.546368. [PMID: 37425963 PMCID: PMC10326975 DOI: 10.1101/2023.06.24.546368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
Impairments in social behavior are observed in a range of neuropsychiatric disorders and several lines of evidence have demonstrated that dysfunction of the prefrontal cortex (PFC) plays a central role in social deficits. We have previously shown that loss of neuropsychiatric risk gene Cacna1c that codes for the Cav1.2 isoform of L-type calcium channels (LTCCs) in the PFC result in impaired sociability as tested using the three-chamber social approach test. In this study we aimed to further characterize the nature of the social deficit associated with a reduction in PFC Cav1.2 channels (Cav1.2PFCKO mice) by testing male mice in a range of social and nonsocial tests while examining PFC neural activity using in vivo GCaMP6s fiber photometry. We found that during the first investigation of the social and non-social stimulus in the three-chamber test, both Cav1.2PFCKO male mice and Cav1.2PFCGFP controls spent significantly more time with the social stimulus compared to a non-social object. In contrast, during repeat investigations while Cav1.2PFCWT mice continued to spend more time with the social stimulus, Cav1.2PFCKO mice spent equal amount of time with both social and non-social stimuli. Neural activity recordings paralleled social behavior with increase in PFC population activity in Cav1.2PFCWT mice during first and repeat investigations, which was predictive of social preference behavior. In Cav1.2PFCKO mice, there was an increase in PFC activity during first social investigation but not during repeat investigations. These behavioral and neural differences were not observed during a reciprocal social interaction test nor during a forced alternation novelty test. To evaluate a potential deficit in reward-related processes, we tested mice in a three-chamber test wherein the social stimulus was replaced by food. Behavioral testing revealed that both Cav1.2PFCWT and Cav1.2PFCKO mice showed a preference for food over object with significantly greater preference during repeat investigation. Interestingly, there was no increase in PFC activity when Cav1.2PFCWT or Cav1.2PFCKO first investigated the food however activity significantly increased in Cav1.2PFCWT mice during repeat investigations of the food. This was not observed in Cav1.2PFCKO mice. In summary, a reduction in Cav1.2 channels in the PFC suppresses the development of a sustained social preference in mice that is associated with lack of PFC neuronal population activity that may be related to deficits in social reward.
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Affiliation(s)
- Jonathan Hackett
- Pediatric Neurology, Department of Pediatrics, Weill Cornell Medicine, New York, NY 10065
| | - Viraj Nadkarni
- Pediatric Neurology, Department of Pediatrics, Weill Cornell Medicine, New York, NY 10065
| | - Ronak S. Singh
- Pediatric Neurology, Department of Pediatrics, Weill Cornell Medicine, New York, NY 10065
| | - Camille L. Carthy
- Pediatric Neurology, Department of Pediatrics, Weill Cornell Medicine, New York, NY 10065
| | - Susan Antigua
- Pediatric Neurology, Department of Pediatrics, Weill Cornell Medicine, New York, NY 10065
| | - Baila S. Hall
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065
- Neuroscience Graduate Program, Weill Cornell Medicine Graduate School of Medical Sciences, New York, NY 10065
| | - Anjali M. Rajadhyaksha
- Pediatric Neurology, Department of Pediatrics, Weill Cornell Medicine, New York, NY 10065
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065
- Neuroscience Graduate Program, Weill Cornell Medicine Graduate School of Medical Sciences, New York, NY 10065
- Weill Cornell Autism Research Program, Weill Cornell Medicine, New York, NY 10065
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Novaes de Oliveira Roldan AC, Fernandes Júnior LCC, de Oliveira CEC, Nunes SOV. Impact of ZNF804A rs1344706 or CACNA1C rs1006737 polymorphisms on cognition in patients with severe mental disorders: A systematic review and meta-analysis. World J Biol Psychiatry 2023; 24:195-208. [PMID: 35786202 DOI: 10.1080/15622975.2022.2097308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
OBJECTIVES This systematic review and meta-analysis focussed on insights into the relationship between CACNA1C-rs1006737 and ZNF804A-rs1344706 polymorphisms and cognitive performance in schizophrenia (SCZ) spectrum and bipolar disorder (BD) and provide some contributions for clinical practice. METHODS We searched the websites databases (PubMED, PsycINFO, Web of Science, EMBASE and Cochrane Library) using eligibility and exclusion criteria to capture all potential studies, based on PICO model and according to the PRISMA. RESULTS Eight articles were included in this systematic review (five referring to CACNA1C-rs1006737 and three related to ZNF804A-rs1344706 polymorphisms), with a total of 5759 participants (1751 SCZ patients, 348 BD patients, 3626 controls and 34 first-degree relatives). The results demonstrated that the pooled effect of CACNA1C-rs1006737 (risk difference RD = 0.08; 95% CI 0.02-0.15) was associated with altered cognitive function in patients with severe mental disorders, but not ZNF804A-rs1344706 polymorphism (RD = 0.19; 95% CI 0.09-0.48. CONCLUSION The present meta-analysis provides evidence regarding slight association between CACNA1C-rs1006737 polymorphisms and cognitive performance in severe mental disorders, indicating that cognitive impairment in severe mental disorders associated with the CACNA1C rs1006737 risk variants could only be expressed when interacting with environmental exposures. This study is registered with PROSPERO, number CRD42021246726.
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Congio AC, Urbano MR, Soares MRZ, Nunes SOV. Cognitive impairment, childhood trauma, sedentary behaviour, and elevated C-reactive protein levels in major affective disorders. J Psychiatr Res 2022; 155:1-9. [PMID: 35969959 DOI: 10.1016/j.jpsychires.2022.07.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 07/10/2022] [Accepted: 07/21/2022] [Indexed: 10/31/2022]
Abstract
Elevated C-reactive protein (CRP) levels were associated with cognitive decline, sedentary behaviour, and childhood trauma in patients with major affective disorders. This study aims to examine the association of peripheral CRP levels, cognitive function, childhood trauma, sedentary behaviour, and quality of life in individuals with major affective disorders, including bipolar disorder (BD), major depressive disorder (MDD), and individuals without mood disorders (controls). We included outpatients with BD (n = 42), MDD (n = 27), and healthy controls (n = 40). All participants were assessed by a questionnaire, structured clinical interview, and the following scales: international physical activity questionnaire, childhood trauma questionnaire, 17-item Hamilton Depression Rating Scale (HDRS17), and World Health Organization Quality of Life instrument, brief version (WHOQOL-BREF). Other measures were included: hs-CRP levels, anthropometric measures, and cognitive tests (Trail-making test part A and part B, Stroop test, phonemic verbal fluency test, and semantic verbal fluency test). Our results indicated that BD outpatients were less significantly physically active on leisure domain than controls. Levels of hs-CRP ≥ 5 mg/L were significantly linked with a history of childhood sexual abuse and childhood physical abuse, as well as worse neurocognitive performance in major depressive disorders, mainly in BD. There was a significant negative correlation between Trail-making part B score and WHOQOL-BREF total score. The findings support the hypothesis that levels of hs-CRP ≥ 5 mg/L may be a possible predictor of cognitive dysfunction, childhood sexual abuse and sedentary behaviour in major affective disorders.
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Affiliation(s)
- Ana Carolina Congio
- Health Sciences Postgraduate Program, Health Sciences Center, State University of Londrina (UEL), Londrina, Paraná, Brazil.
| | - Mariana Ragassi Urbano
- Health Sciences Postgraduate Program, Health Sciences Center, State University of Londrina (UEL), Londrina, Paraná, Brazil; Department of Statistics, Center of Exact Sciences, State University of Londrina, (UEL), Londrina, Paraná, Brazil
| | - Maria Rita Zoega Soares
- Postgraduate Program in Behavior Analysis, Center of Biological Sciences, State University of Londrina (UEL), Londrina, Paraná, Brazil
| | - Sandra Odebrecht Vargas Nunes
- Health Sciences Postgraduate Program, Health Sciences Center, State University of Londrina (UEL), Londrina, Paraná, Brazil; Department of Clinical Medicine, Psychiatry Unit, Health Sciences Center, State University of Londrina, (UEL), Londrina, Paraná, Brazil
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Abstract
PURPOSE Development of new thymoleptic medications has primarily centered on anticonvulsants and antipsychotic drugs. Based on our studies of intracellular calcium ion signaling in mood disorders, we were interested in the use of novel medications that act on this mechanism of neuronal activation as potential mood stabilizers. METHOD We reviewed the dynamics of the calcium second messenger system and the international body of data demonstrating increased baseline and stimulated intracellular calcium levels in peripheral cells of patients with bipolar mood disorders. We then examined studies of the effect of established mood stabilizers on intracellular calcium ion levels and on mechanisms of mobilization of this second messenger. After summarizing studies of calcium channel blocking agents, whose primary action is to attenuate hyperactive intracellular calcium signaling, we considered clinical experience with this class of medications and the potential for further research. FINDINGS Established mood stabilizers normalize increased intracellular calcium ion levels in bipolar disorder patients. Most case series and controlled studies suggest an antimanic and possibly mood stabilizing effect of the calcium channel blocking medications verapamil and nimodipine, with fewer data on isradipine. A relatively low risk of teratogenicity and lack of cognitive adverse effects or weight gain suggest possible applications in pregnancy and in patients for whom these are considerations. IMPLICATIONS Medications that antagonize hyperactive intracellular signaling warrant more interest than they have received in psychiatry. Further experience will clarify the applications of these medications alone and in combination with more established mood stabilizers.
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Burdick KE, Perez-Rodriguez M, Birnbaum R, Shanahan M, Larsen E, Harper C, Poskus J, Sklar P. A molecular approach to treating cognition in schizophrenia by calcium channel blockade: An open-label pilot study of the calcium-channel antagonist isradipine. Schizophr Res Cogn 2020; 21:100180. [PMID: 32455122 PMCID: PMC7235642 DOI: 10.1016/j.scog.2020.100180] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/28/2020] [Accepted: 05/02/2020] [Indexed: 11/13/2022] Open
Abstract
Cognitive impairment is a prominent and difficult to treat symptom in schizophrenia (SZ), which is directly related to functional disability. A variant in the gene coding for the alpha 1C subunit of L-type voltage gated calcium channel (CACNA1C) has been shown to negatively affect several neurocognitive domains. We conducted a 4-week, open label, pilot study of isradipine, a calcium channel blocker, to determine its feasibility, safety, and efficacy in improving cognition in SZ patients. Ten adults with stable SZ were started on a flexible dose of isradipine 5 mg/day (up to 10 mg/day) for 4 weeks. Weekly in-person visits tracked side effects and symptoms while neurocognition and functional capacity were assessed at baseline and week 4. There were no serious adverse events reported. Newly emergent side effects were dizziness (1 new incidence at week 4); difficulty sleeping (2 new incidences at week 4); and decreased energy (3 new incidences at week 4). 1 patient discontinued medication and was withdrawn. Treatment did not exacerbate clinical symptoms. Although power is limited, results indicate no clear benefit on neurocognition but a positive effect (baseline mean = 6.8 ± 1.3 to week 4 mean = 7.9 ± 1.1; t = 2.91, p = 0.017) on functional capacity was noted. This open label, pilot study provides preliminary evidence that isradipine is a relatively safe medication when used adjunctively in SZ patients. This study suggests that isradipine offers no clear cognitive and only minimal functional benefit; however, additional studies may be warranted in symptomatic patients, or those with specific CACNA1C genotypes.
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Affiliation(s)
| | | | | | - Megan Shanahan
- Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Emmett Larsen
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Cierra Harper
- Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Jessica Poskus
- Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Pamela Sklar
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Liu YP, Wu X, Xia X, Yao J, Wang BJ. The genome-wide supported CACNA1C gene polymorphisms and the risk of schizophrenia: an updated meta-analysis. BMC MEDICAL GENETICS 2020; 21:159. [PMID: 32770953 PMCID: PMC7414708 DOI: 10.1186/s12881-020-01084-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 07/02/2020] [Indexed: 02/08/2023]
Abstract
Background The CACNA1C gene was defined as a risk gene for schizophrenia in a large genome-wide association study of European ancestry performed by the Psychiatric Genomics Consortium. Previous meta-analyses focused on the association between the CACNA1C gene rs1006737 and schizophrenia. The present study focused on whether there was an ancestral difference in the effect of the CACNA1C gene rs1006737 on schizophrenia. rs2007044 and rs4765905 were analyzed for their effect on the risk of schizophrenia. Methods Pooled, subgroup, sensitivity, and publication bias analysis were conducted. Results A total of 18 studies met the inclusion criteria, including fourteen rs1006737 studies (15,213 cases, 19,412 controls), three rs2007044 studies (6007 cases, 6518 controls), and two rs4765905 studies (2435 cases, 2639 controls). An allele model study also related rs2007044 and rs4765905 to schizophrenia. The overall meta-analysis for rs1006737, which included the allele contrast, dominant, recessive, codominance, and complete overdominance models, showed significant differences between rs1006737 and schizophrenia. However, the ancestral-based subgroup analysis for rs1006737 found that the genotypes GG and GG + GA were only protective factors for schizophrenia in Europeans. In contrast, the rs1006737 GA genotype only reduced the risk of schizophrenia in Asians. Conclusions Rs1006737, rs2007044, and rs4765905 of the CACNA1C gene were associated with susceptibility to schizophrenia. However, the influence model for rs1006737 on schizophrenia in Asians and Europeans demonstrated both similarities and differences between the two ancestors.
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Affiliation(s)
- Yong-Ping Liu
- School of Forensic Medicine, China Medical University, No.77 Puhe Road, Shenbei New District, Shenyang, 110122, China
| | - Xue Wu
- School of Forensic Medicine, China Medical University, No.77 Puhe Road, Shenbei New District, Shenyang, 110122, China
| | - Xi Xia
- School of Forensic Medicine, China Medical University, No.77 Puhe Road, Shenbei New District, Shenyang, 110122, China
| | - Jun Yao
- School of Forensic Medicine, China Medical University, No.77 Puhe Road, Shenbei New District, Shenyang, 110122, China.
| | - Bao-Jie Wang
- School of Forensic Medicine, China Medical University, No.77 Puhe Road, Shenbei New District, Shenyang, 110122, China.
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Chen WY, Chen JC, Cheng YC, Liu HC, Kuo PH, Huang MC. Gene polymorphisms of cognitive function in patients with bipolar disorder: A systematic review and meta-analysis. TAIWANESE JOURNAL OF PSYCHIATRY 2020. [DOI: 10.4103/tpsy.tpsy_2_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Prata DP, Costa-Neves B, Cosme G, Vassos E. Unravelling the genetic basis of schizophrenia and bipolar disorder with GWAS: A systematic review. J Psychiatr Res 2019; 114:178-207. [PMID: 31096178 DOI: 10.1016/j.jpsychires.2019.04.007] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 04/08/2019] [Accepted: 04/10/2019] [Indexed: 01/02/2023]
Abstract
OBJECTIVES To systematically review findings of GWAS in schizophrenia (SZ) and in bipolar disorder (BD); and to interpret findings, with a focus on identifying independent replications. METHOD PubMed search, selection and review of all independent GWAS in SZ or BD, published since March 2011, i.e. studies using non-overlapping samples within each article, between articles, and with those of the previous review (Li et al., 2012). RESULTS From the 22 GWAS included in this review, the genetic associations surviving standard GWAS-significance were for genetic markers in the regions of ACSL3/KCNE4, ADCY2, AMBRA1, ANK3, BRP44, DTL, FBLN1, HHAT, INTS7, LOC392301, LOC645434/NMBR, LOC729457, LRRFIP1, LSM1, MDM1, MHC, MIR2113/POU3F2, NDST3, NKAPL, ODZ4, PGBD1, RENBP, TRANK1, TSPAN18, TWIST2, UGT1A1/HJURP, WHSC1L1/FGFR1 and ZKSCAN4. All genes implicated across both reviews are discussed in terms of their function and implication in neuropsychiatry. CONCLUSION Taking all GWAS to date into account, AMBRA1, ANK3, ARNTL, CDH13, EFHD1 (albeit with different alleles), MHC, PLXNA2 and UGT1A1 have been implicated in either disorder in at least two reportedly non-overlapping samples. Additionally, evidence for a SZ/BD common genetic basis is most strongly supported by the implication of ANK3, NDST3, and PLXNA2.
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Affiliation(s)
- Diana P Prata
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Portugal; Centre for Neuroimaging Sciences, Institute of Psychiatry, Psychology & Neuroscience, King's College London, 16 De Crespigny Park, SE5 8AF, UK; Instituto Universitário de Lisboa (ISCTE-IUL), Centro de Investigação e Intervenção Social, Lisboa, Portugal.
| | - Bernardo Costa-Neves
- Lisbon Medical School, University of Lisbon, Av. Professor Egas Moniz, 1649-028, Lisbon, Portugal; Centro Hospitalar Psiquiátrico de Lisboa, Av. do Brasil, 53 1749-002, Lisbon, Portugal
| | - Gonçalo Cosme
- Instituto de Biofísica e Engenharia Biomédica, Faculdade de Ciências, Universidade de Lisboa, Portugal
| | - Evangelos Vassos
- Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, 16 De Crespigny Park, SE5 8AF, UK
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Kisko TM, Braun MD, Michels S, Witt SH, Rietschel M, Culmsee C, Schwarting RKW, Wöhr M. Sex‐dependent effects of
Cacna1c
haploinsufficiency on juvenile social play behavior and pro‐social 50‐kHz ultrasonic communication in rats. GENES BRAIN AND BEHAVIOR 2019; 19:e12552. [DOI: 10.1111/gbb.12552] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 12/22/2018] [Accepted: 12/26/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Theresa M. Kisko
- Behavioral Neuroscience, Experimental and Biological Psychology, Department of PsychologyPhilipps‐Universität Marburg Marburg Germany
| | - Moria D. Braun
- Behavioral Neuroscience, Experimental and Biological Psychology, Department of PsychologyPhilipps‐Universität Marburg Marburg Germany
| | - Susanne Michels
- Institute of Pharmacology and Clinical PharmacyPhilipps‐Universität Marburg Marburg Germany
| | - Stephanie H. Witt
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Faculty of Medicine MannheimRuprecht‐Karls‐Universität Heidelberg Mannheim Germany
| | - Marcella Rietschel
- Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Faculty of Medicine MannheimRuprecht‐Karls‐Universität Heidelberg Mannheim Germany
| | - Carsten Culmsee
- Institute of Pharmacology and Clinical PharmacyPhilipps‐Universität Marburg Marburg Germany
- Center for Mind, Brain, and Behavior (CMBB)Philipps‐Universität Marburg Marburg Germany
| | - Rainer K. W. Schwarting
- Behavioral Neuroscience, Experimental and Biological Psychology, Department of PsychologyPhilipps‐Universität Marburg Marburg Germany
- Center for Mind, Brain, and Behavior (CMBB)Philipps‐Universität Marburg Marburg Germany
| | - Markus Wöhr
- Behavioral Neuroscience, Experimental and Biological Psychology, Department of PsychologyPhilipps‐Universität Marburg Marburg Germany
- Center for Mind, Brain, and Behavior (CMBB)Philipps‐Universität Marburg Marburg Germany
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Braun MD, Kisko TM, Vecchia DD, Andreatini R, Schwarting RKW, Wöhr M. Sex-specific effects of Cacna1c haploinsufficiency on object recognition, spatial memory, and reversal learning capabilities in rats. Neurobiol Learn Mem 2018; 155:543-555. [PMID: 29800644 DOI: 10.1016/j.nlm.2018.05.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 05/03/2018] [Accepted: 05/17/2018] [Indexed: 10/16/2022]
Abstract
The CACNA1C gene is strongly implicated in the etiology of multiple major neuropsychiatric disorders, such as bipolar disorder, major depression, and schizophrenia, with cognitive deficits being a common feature. It is unclear, however, by which mechanisms CACNA1C variants advance the risk of developing neuropsychiatric disorders. This study set out to investigate cognitive functioning in a newly developed genetic Cacna1c rat model. Specifically, spatial and reversal learning, as well as object recognition memory were assessed in heterozygous Cacna1c+/- rats and compared to wildtype Cacna1c+/+ littermate controls in both sexes. Our results show that both Cacna1c+/+ and Cacna1c+/- animals were able to learn the rewarded arm configuration of a radial maze over the course of seven days. Both groups also showed reversal learning patterns indicative of intact abilities. In females, genotype differences were evident in the initial spatial learning phase, with Cacna1c+/- females showing hypo-activity and fewer mixed errors. In males, a difference was found during probe trials for both learning phases, with Cacna1c+/- rats displaying better distinction between previously baited and non-baited arms; and regarding cognitive flexibility in favor of the Cacna1c+/+ animals. All experimental groups proved to be sensitive to reward magnitude and fully able to distinguish between novel and familiar objects in the novel object recognition task. Taken together, these results indicate that Cacna1c haploinsufficiency has a minor, but positive impact on (spatial) memory functions in rats.
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Affiliation(s)
- Moria D Braun
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenberg-Str. 18, D-35032 Marburg, Germany
| | - Theresa M Kisko
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenberg-Str. 18, D-35032 Marburg, Germany
| | - Débora Dalla Vecchia
- Laboratory of Physiology and Pharmacology of the Central Nervous System, Department of Pharmacology, Federal University of Paraná, Centro Politécnico, 81540-990 Curitiba, PR, Brazil
| | - Roberto Andreatini
- Laboratory of Physiology and Pharmacology of the Central Nervous System, Department of Pharmacology, Federal University of Paraná, Centro Politécnico, 81540-990 Curitiba, PR, Brazil
| | - Rainer K W Schwarting
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenberg-Str. 18, D-35032 Marburg, Germany; Center for Mind, Brain and Behavior, Philipps-University of Marburg, Hans-Meerwein-Str. 6, D-35032 Marburg, Germany
| | - Markus Wöhr
- Behavioral Neuroscience, Experimental and Biological Psychology, Philipps-University of Marburg, Gutenberg-Str. 18, D-35032 Marburg, Germany; Center for Mind, Brain and Behavior, Philipps-University of Marburg, Hans-Meerwein-Str. 6, D-35032 Marburg, Germany.
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Amato RJ, Boland J, Myer N, Few L, Dowd D. Pharmacogenomics and Psychiatric Clinical Care. J Psychosoc Nurs Ment Health Serv 2018; 56:22-31. [DOI: 10.3928/02793695-20170928-01] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 08/14/2017] [Indexed: 12/28/2022]
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12
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Cosgrove D, Mothersill O, Kendall K, Konte B, Harold D, Giegling I, Hartmann A, Richards A, Mantripragada K, Owen MJ, O’Donovan MC, Gill M, Rujescu D, Walters J, Corvin A, Morris DW, Donohoe G. Cognitive Characterization of Schizophrenia Risk Variants Involved in Synaptic Transmission: Evidence of CACNA1C's Role in Working Memory. Neuropsychopharmacology 2017; 42:2612-2622. [PMID: 28607492 PMCID: PMC5686488 DOI: 10.1038/npp.2017.123] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 04/13/2017] [Accepted: 05/19/2017] [Indexed: 12/20/2022]
Abstract
With >100 common variants associated with schizophrenia risk, establishing their biological significance is a priority. We sought to establish cognitive effects of risk variants at loci implicated in synaptic transmission by (1) identifying GWAS schizophrenia variants whose associated gene function is related to synaptic transmission, and (2) testing for association between these and measures of neurocognitive function. We selected variants, reported in the largest GWAS to date, associated with genes involved in synaptic transmission. Associations between genotype and cognitive test score were analyzed in a discovery sample (988 Irish participants, including 798 with psychosis), and replication samples (528 UK patients with schizophrenia/schizoaffective disorder; 921 German participants including 362 patients with schizophrenia). Three loci showed significant associations with neuropsychological performance in the discovery samples. This included an association between the rs2007044 (risk allele G) within CACNA1C and poorer working memory performance (increased errors B (95% CI)=0.635-4.535, p=0.012), an effect driven mainly by the psychosis groups. In an fMRI analysis of working memory performance (n=84 healthy participants, a subset of the discovery sample), we further found evidence that the same CACNA1C allele was associated with decreased functional connectivity between the right dorsolateral prefrontal cortex and right superior occipital gyrus/cuneus and anterior cingulate cortex. In conclusion, these data provide evidence to suggest that the CACNA1C risk variant rs2007044 is associated with poorer memory function that may result from risk carriers' difficulty with top-down initiated responses caused by dysconnectivity between the right DLPFC and several cortical regions.
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Affiliation(s)
- Donna Cosgrove
- The Cognitive Genetics & Cognitive Therapy Group, The School of Psychology and Discipline of Biochemistry, The Centre for Neuroimaging & Cognitive Genomics, National University of Ireland Galway, Galway, Ireland
| | - Omar Mothersill
- The Cognitive Genetics & Cognitive Therapy Group, The School of Psychology and Discipline of Biochemistry, The Centre for Neuroimaging & Cognitive Genomics, National University of Ireland Galway, Galway, Ireland
| | - Kimberley Kendall
- Institute of Psychological Medicine and Clinical Neurosciences, Cardiff University, Cardiff, UK
| | - Bettina Konte
- Department of Psychiatry, Psychotherapy and Psychosomatics, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Denise Harold
- Neuropsychiatric Genetics Research Group, Department of Psychiatry, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
- School of Biotechnology, Dublin City University, Dublin, Ireland
| | - Ina Giegling
- Department of Psychiatry, Psychotherapy and Psychosomatics, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Annette Hartmann
- Department of Psychiatry, Psychotherapy and Psychosomatics, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Alex Richards
- MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Cardiff, UK
| | - Kiran Mantripragada
- MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Cardiff, UK
| | | | - Michael J Owen
- MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Cardiff, UK
| | - Michael C O’Donovan
- MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Cardiff, UK
| | - Michael Gill
- Neuropsychiatric Genetics Research Group, Department of Psychiatry, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
| | - Dan Rujescu
- Department of Psychiatry, Psychotherapy and Psychosomatics, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - James Walters
- Institute of Psychological Medicine and Clinical Neurosciences, Cardiff University, Cardiff, UK
| | - Aiden Corvin
- Neuropsychiatric Genetics Research Group, Department of Psychiatry, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
| | - Derek W Morris
- The Cognitive Genetics & Cognitive Therapy Group, The School of Psychology and Discipline of Biochemistry, The Centre for Neuroimaging & Cognitive Genomics, National University of Ireland Galway, Galway, Ireland
| | - Gary Donohoe
- The Cognitive Genetics & Cognitive Therapy Group, The School of Psychology and Discipline of Biochemistry, The Centre for Neuroimaging & Cognitive Genomics, National University of Ireland Galway, Galway, Ireland
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13
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Fatima A, Farooq M, Abdullah U, Tariq M, Mustafa T, Iqbal M, Tommerup N, Mahmood Baig S. Genome-Wide Supported Risk Variants in MIR137, CACNA1C, CSMD1, DRD2, and GRM3 Contribute to Schizophrenia Susceptibility in Pakistani Population. Psychiatry Investig 2017; 14:687-692. [PMID: 29042896 PMCID: PMC5639139 DOI: 10.4306/pi.2017.14.5.687] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 08/22/2016] [Accepted: 09/26/2016] [Indexed: 01/09/2023] Open
Abstract
OBJECTIVE Schizophrenia is a chronic neuropsychiatric disease afflicting around 1.1% of the population worldwide. Recently, MIR137, CACNA1C, CSMD1, DRD2, and GRM3 have been reported as the most robustly emerging candidates involved in the etiology of schizophrenia. In this case control study, we performed an association analysis of rs1625579 (MIR137), rs1006737, rs4765905 (CACNA1C), rs10503253 (CSMD1), rs1076560 (DRD2), rs12704290, rs6465084, and rs148754219 (GRM3) in Pakistani population. METHODS Schizophrenia was diagnosed on the basis of the Diagnostic and Statistical Manual of Mental Disorders 4th ed (DSM-IV). Detailed clinical information, family history of all patients and healthy controls were collected. RFLP based case control association study was performed in a Pakistani cohort of 508 schizophrenia patients and 300 healthy control subjects. Alleles and genotype frequencies were calculated using SPSS. RESULTS A significant difference in the genotype and allele frequencies for rs4765905, rs1076560 and rs6465084 were found between the patients and controls (p=0.000). CONCLUSION This study provides substantial evidence supporting the role of CACNA1C, GRM3 and DRD2 as schizophrenia susceptibility genes in Pakistani population.
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Affiliation(s)
- Ambrin Fatima
- Human Molecular Genetics Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), PIEAS, Faisalabad, Pakistan
| | - Muhammad Farooq
- Wilhelm Johannsen Centre for Functional Genome Research, Institute of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Uzma Abdullah
- Human Molecular Genetics Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), PIEAS, Faisalabad, Pakistan
| | - Muhammad Tariq
- Human Molecular Genetics Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), PIEAS, Faisalabad, Pakistan
| | - Tanveer Mustafa
- Human Molecular Genetics Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), PIEAS, Faisalabad, Pakistan
| | | | - Niels Tommerup
- Wilhelm Johannsen Centre for Functional Genome Research, Institute of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Shahid Mahmood Baig
- Human Molecular Genetics Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering (NIBGE), PIEAS, Faisalabad, Pakistan
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14
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Lin K, Xu G, Shi L, Lu W, Guan L, Ouyang H, Chen K, Dang Y, Zhou L, So KF. CACNA1C polymorphisms Impact Cognitive Recovery in Patients with Bipolar Disorder in a Six-week Open-label Trial. Sci Rep 2017; 7:7022. [PMID: 28765577 PMCID: PMC5539285 DOI: 10.1038/s41598-017-07368-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 06/28/2017] [Indexed: 11/21/2022] Open
Abstract
Cognitive impairments in bipolar patients deteriorate as the disorder progresses. Little is known about whether genetic risks impact cognitive recovery during the course from depression to remission. In this six-week open-label trial, we shed light on the impacts of six single nucleotide polymorphisms (SNPs) in the calcium voltage-gated channel subunit alpha1 C (CACNA1C) gene on cognitive recovery in 192 bipolar patients suffering a major depressive episode (MDE). The primary outcome measures were changes in a battery of neuropsychological tests following 6-week treatment. Carriers with rs10466907 GT genotype did not significantly improve their executive function total scores on the Wisconsin Card Sorting Test after six weeks of treatment compared to the TT genotypes (β = −0.944, 95% Confidence Interval (CI) = −1.482–−0.405). Moreover, during a MDE carriers with rs58619945 GG and GA genotypes performed significantly worse than those with AA genotype on the categories completed (p = 0.013 and p = 0.001), total errors (p = 0.039 and p = 0.009), and random errors (p = 0.055 and p = 0.014, respectively). Our data suggest that the tested CACNA1C SNPs may have impacts on cognitive recovery from depression.
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Affiliation(s)
- Kangguang Lin
- Department of Affective Disorders, The Affiliated Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China.,Laboratory of Emotion and Cognition, The Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,GMH Institute of CNS Regeneration, Jinan University, Guangzhou, China
| | - Guiyun Xu
- Department of Affective Disorders, The Affiliated Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China. .,Laboratory of Emotion and Cognition, The Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
| | - Lingling Shi
- GMH Institute of CNS Regeneration, Jinan University, Guangzhou, China.,Ministry of Education Joint International Research Laboratory of CNS Regeneration, Jinan University, Guangzhou, China.,Co-Innovation Center for Neuroregeneration, Nantong University, Nantong, China
| | - Weicong Lu
- Department of Affective Disorders, The Affiliated Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China.,Laboratory of Emotion and Cognition, The Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Lijie Guan
- Department of Affective Disorders, The Affiliated Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China
| | - Huiyi Ouyang
- Department of Affective Disorders, The Affiliated Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China
| | - Kun Chen
- Department of Affective Disorders, The Affiliated Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China.,Laboratory of Emotion and Cognition, The Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yamei Dang
- Department of Affective Disorders, The Affiliated Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China
| | - Libing Zhou
- GMH Institute of CNS Regeneration, Jinan University, Guangzhou, China.,Ministry of Education Joint International Research Laboratory of CNS Regeneration, Jinan University, Guangzhou, China.,Co-Innovation Center for Neuroregeneration, Nantong University, Nantong, China
| | - Kwok-Fai So
- GMH Institute of CNS Regeneration, Jinan University, Guangzhou, China. .,Ministry of Education Joint International Research Laboratory of CNS Regeneration, Jinan University, Guangzhou, China. .,Co-Innovation Center for Neuroregeneration, Nantong University, Nantong, China. .,The State Key Laboratory of Brain and Cognitive Sciences and Department of Ophthalmology, The University of Hong Kong, Hong Kong, Hong Kong.
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15
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Kabir ZD, Lee AS, Rajadhyaksha AM. L-type Ca 2+ channels in mood, cognition and addiction: integrating human and rodent studies with a focus on behavioural endophenotypes. J Physiol 2016; 594:5823-5837. [PMID: 26913808 PMCID: PMC5063939 DOI: 10.1113/jp270673] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 11/28/2015] [Indexed: 01/07/2023] Open
Abstract
Brain Cav 1.2 and Cav 1.3 L-type Ca2+ channels play key physiological roles in various neuronal processes that contribute to brain function. Genetic studies have recently identified CACNA1C as a candidate risk gene for bipolar disorder (BD), schizophrenia (SCZ), major depressive disorder (MDD) and autism spectrum disorder (ASD), and CACNA1D for BD and ASD, suggesting a contribution of Cav 1.2 and Cav 1.3 Ca2+ signalling to the pathophysiology of neuropsychiatric disorders. Once considered sole clinical entities, it is now clear that BD, SCZ, MDD and ASD share common phenotypic features, most likely due to overlapping neurocircuitry and common molecular mechanisms. A major future challenge lies in translating the human genetic findings to pathological mechanisms that are translatable back to the patient. One approach for tackling such a daunting scientific endeavour for complex behaviour-based neuropsychiatric disorders is to examine intermediate biological phenotypes in the context of endophenotypes within distinct behavioural domains. This will better allow us to integrate findings from genes to behaviour across species, and improve the chances of translating preclinical findings to clinical practice.
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Affiliation(s)
- Z D Kabir
- Division of Pediatric Neurology, Department of Pediatrics, Weill Cornell Medical College, New York, NY, USA
- Feil Family Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY, USA
- Weill Cornell Autism Research Program, Weill Cornell Medical College, New York, NY, USA
| | - A S Lee
- Division of Pediatric Neurology, Department of Pediatrics, Weill Cornell Medical College, New York, NY, USA
- Feil Family Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY, USA
- Weill Cornell Autism Research Program, Weill Cornell Medical College, New York, NY, USA
| | - A M Rajadhyaksha
- Division of Pediatric Neurology, Department of Pediatrics, Weill Cornell Medical College, New York, NY, USA.
- Feil Family Brain and Mind Research Institute, Weill Cornell Medical College, New York, NY, USA.
- Weill Cornell Autism Research Program, Weill Cornell Medical College, New York, NY, USA.
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16
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Rolstad S, Sellgren Majkowitz C, Joas E, Ekman CJ, Pålsson E, Landén M. Polymorphisms of BDNF and CACNA1C are not associated with cognitive functioning in bipolar disorder or healthy controls. Cogn Neuropsychiatry 2016; 21:271-8. [PMID: 27221213 DOI: 10.1080/13546805.2016.1185405] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
INTRODUCTION The cause of cognitive dysfunction in bipolar disorder (BD) is not well understood. BDNF and CACNA1C are two susceptibility genes for the disorder that have also been reported to be associated with cognitive deficits in the disorder, but the studies have been small and with conflicting results. We therefore attempted to replicate an association between cognitive dysfunction with the most commonly studied single nucleotide polymorphisms rs6265 and rs1006737. METHODS Regression models with five aggregated cognitive domains derived from a comprehensive test battery and IQ score were run using directly genotyped risk variants of SNPs rs6265 and rs1006737 as predictors with covariates as appropriate. Models were performed in a clinical sample of Swedish patients with BD (N = 114) and sex- and age-matched population controls (N = 104). RESULTS No significant associations (regardless of correction for multiple testing) between the BDNF and CACNA1C risk variants and cognitive functioning were found in either patients or controls. CONCLUSIONS Our results do not support that the common genetic risk variants in rs6265 and rs1006737 are associated with cognitive dysfunction.
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Affiliation(s)
- Sindre Rolstad
- a Institute of Neuroscience and Physiology , The Sahlgrenska Academy at the Gothenburg University , Gothenburg , Sweden
| | - Carl Sellgren Majkowitz
- b Department of Medical Epidemiology and Biostatistics , Karolinska Institutet , Stockholm , Sweden
| | - Erik Joas
- a Institute of Neuroscience and Physiology , The Sahlgrenska Academy at the Gothenburg University , Gothenburg , Sweden
| | - Carl Johan Ekman
- c Department of Clinical Neuroscience , Karolinska Institutet , Stockholm , Sweden
| | - Erik Pålsson
- a Institute of Neuroscience and Physiology , The Sahlgrenska Academy at the Gothenburg University , Gothenburg , Sweden
| | - Mikael Landén
- a Institute of Neuroscience and Physiology , The Sahlgrenska Academy at the Gothenburg University , Gothenburg , Sweden.,b Department of Medical Epidemiology and Biostatistics , Karolinska Institutet , Stockholm , Sweden.,c Department of Clinical Neuroscience , Karolinska Institutet , Stockholm , Sweden
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17
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Lancaster TM, Foley S, Tansey KE, Linden DEJ, Caseras X. CACNA1C risk variant is associated with increased amygdala volume. Eur Arch Psychiatry Clin Neurosci 2016; 266:269-75. [PMID: 26048451 DOI: 10.1007/s00406-015-0609-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 05/28/2015] [Indexed: 01/17/2023]
Abstract
Genome-wide association studies suggest that genetic variation within L-type calcium channel subunits confer risk to psychosis. The single nucleotide polymorphism at rs1006737 in CACNA1C has been associated with both schizophrenia and bipolar disorder and with several intermediate phenotypes that may serve as neurobiological antecedents, linking psychosis to genetic aetiology. Amongst others, it has been implicated in alterations in amygdala structure and function. In the present study, we show that the risk allele (A) is associated with increased amygdala volume in healthy individuals (n = 258). This observation reinforces a hypothesis that genetic variation may confer risk to psychosis via alterations in limbic structures. Further study of CACNA1C using intermediate phenotypes for psychosis will determine the mechanisms by which variation in this gene confers risk.
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Affiliation(s)
- T M Lancaster
- Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, Wales, UK. .,Cardiff University Brain Research Imaging Centre (CUBRIC), School of Psychology, Cardiff University, 70 Park Place, Cardiff, CF10 3AT, Wales, UK.
| | - S Foley
- Cardiff University Brain Research Imaging Centre (CUBRIC), School of Psychology, Cardiff University, 70 Park Place, Cardiff, CF10 3AT, Wales, UK.,MRC Centre for Neuropsychiatric Genetics and Genomics, Institute of Psychological Medicine and Clinical Neurosciences, Cardiff School of Medicine, Cardiff University, Cardiff, Wales, UK
| | - K E Tansey
- MRC Centre for Neuropsychiatric Genetics and Genomics, Institute of Psychological Medicine and Clinical Neurosciences, Cardiff School of Medicine, Cardiff University, Cardiff, Wales, UK
| | - D E J Linden
- Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, Wales, UK.,Cardiff University Brain Research Imaging Centre (CUBRIC), School of Psychology, Cardiff University, 70 Park Place, Cardiff, CF10 3AT, Wales, UK.,MRC Centre for Neuropsychiatric Genetics and Genomics, Institute of Psychological Medicine and Clinical Neurosciences, Cardiff School of Medicine, Cardiff University, Cardiff, Wales, UK
| | - X Caseras
- Cardiff University Brain Research Imaging Centre (CUBRIC), School of Psychology, Cardiff University, 70 Park Place, Cardiff, CF10 3AT, Wales, UK.,MRC Centre for Neuropsychiatric Genetics and Genomics, Institute of Psychological Medicine and Clinical Neurosciences, Cardiff School of Medicine, Cardiff University, Cardiff, Wales, UK
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18
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Rolstad S, Pålsson E, Ekman CJ, Eriksson E, Sellgren C, Landén M. Polymorphisms of dopamine pathway genes NRG1 and LMX1A are associated with cognitive performance in bipolar disorder. Bipolar Disord 2015; 17:859-68. [PMID: 26534905 DOI: 10.1111/bdi.12347] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 09/19/2015] [Indexed: 01/11/2023]
Abstract
OBJECTIVES LIM homeobox transcription factor 1, alpha (LMX1A) and neuregulin 1 (NRG1) are susceptibility genes for schizophrenia that have been implicated in the dopaminergic pathway and have been associated with altered cognitive functioning. We hypothesized that single nucleotide polymorphisms (SNPs) in LMX1A and NRG1 would be associated with cognitive functioning in bipolar disorder. METHODS In total, four SNPs were directly genotyped. Regression models with five aggregated cognitive domains and intelligence quotient (IQ) score were run using risk variants of LMX1A (rs11809911, rs4657412, rs6668493) and NRG1 (rs35753505) as predictors. Models were performed in a clinical sample of patients with bipolar disorder (n = 114) and healthy controls (n = 104). RESULTS The risk variants of the rs11809911 SNP in LMX1A were negatively associated with IQ score and memory/learning, whereas the risk variants of rs35753505 in NRG1 were positively associated with IQ score (adjusted R(2) = 0.17, Q = 0.006) and memory/learning (adjusted R(2) = 0.24, Q = 0.001). The risk variants of the rs35753505 SNP in NRG1 were positively associated with language (adjusted R(2) = 0.11, Q = 0.006), visuospatial functions (adjusted R(2) = 0.23, Q = 0.001), and attention/speed (adjusted R(2) = 0.25, Q = 0.001). Results could not be replicated in controls. CONCLUSIONS The risk variants of the rs35753505 SNP were associated with increased performance in several cognitive domains and IQ, whereas the risk variants of the rs11809911 SNP in LMX1A was associated with reduced IQ and memory/learning.
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Affiliation(s)
- Sindre Rolstad
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Erik Pålsson
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Carl Johan Ekman
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Elias Eriksson
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Carl Sellgren
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Mikael Landén
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden.,Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
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19
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Ou X, Crane DE, MacIntosh BJ, Young LT, Arnold P, Ameis S, Goldstein BI. CACNA1C rs1006737 genotype and bipolar disorder: Focus on intermediate phenotypes and cardiovascular comorbidity. Neurosci Biobehav Rev 2015; 55:198-210. [DOI: 10.1016/j.neubiorev.2015.04.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 04/28/2015] [Accepted: 04/30/2015] [Indexed: 01/18/2023]
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Abstract
The last several years have been breakthrough ones in bipolar disorder (BPD) genetics, as the field has identified robust risk variants for the first time. Leading the way have been genome-wide association studies (GWAS) that have assessed common genetic markers across very large groups of patients and controls. These have resulted in findings in genes including ANK3, CACNA1C, SYNE1, ODZ4, and TRANK1. Additional studies have begun to examine the biology of these genes and how risk variants influence aspects of brain and behavior that underlie BPD. For example, carriers of the CACNA1C risk variant have been found to exhibit hippocampal and anterior cingulate dysfunction during episodic memory recall. This work has shed additional light on the relationship of bipolar susceptibility variants to other disorders, particularly schizophrenia. Even larger BPD GWAS are expected with samples now amassed of 21,035 cases and 28,758 controls. Studies have examined the pharmacogenomics of BPD with studies of lithium response, yielding high profile results that remain to be confirmed. The next frontier in the field is the identification of rare bipolar susceptibility variants through large-scale DNA sequencing. While only a couple of papers have been published to date, many studies are underway. The Bipolar Sequencing Consortium has been formed to bring together all of the groups working in this area, and to perform meta-analyses of the data generated. The consortium, with 13 member groups, now has exome data on ~3,500 cases and ~5,000 controls, and on ~162 families. The focus will likely shift within several years from exome data to whole genome data as costs of obtaining such data continue to drop. Gene-mapping studies are now providing clear results that provide insights into the pathophysiology of the disorder. Sequencing studies should extend this process further. Findings could eventually set the stage for rational therapeutic development.
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Affiliation(s)
- Gen Shinozaki
- Department of Psychiatry, University of Iowa Carver College of Medicine, Iowa City, IA, USA
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21
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Ivorra JL, Rivero O, Costas J, Iniesta R, Arrojo M, Ramos-Ríos R, Carracedo A, Palomo T, Rodriguez-Jimenez R, Cervilla J, Gutiérrez B, Molina E, Arango C, Alvarez M, Pascual JC, Pérez V, Saiz PA, García-Portilla MP, Bobes J, González-Pinto A, Zorrilla I, Haro JM, Bernardo M, Baca-García E, González JC, Hoenicka J, Moltó MD, Sanjuán J. Replication of previous genome-wide association studies of psychiatric diseases in a large schizophrenia case-control sample from Spain. Schizophr Res 2014; 159:107-13. [PMID: 25124521 DOI: 10.1016/j.schres.2014.07.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 07/08/2014] [Accepted: 07/08/2014] [Indexed: 12/22/2022]
Abstract
Genome wide association studies (GWAS) has allowed the discovery of some interesting risk variants for schizophrenia (SCZ). However, this high-throughput approach presents some limitations, being the most important the necessity of highly restrictive statistical corrections as well as the loss of statistical power inherent to the use of a Single Nucleotide Polymorphism (SNP) analysis approach. These problems can be partially solved through the use of a polygenic approach. We performed a genotyping study in SCZ using 86 previously associated SNPs identified by GWAS of SCZ, bipolar disorder (BPD) and autistic spectrum disorder (ASD) patients. The sample consisted of 3063 independent cases with DSM-IV-TR diagnosis of SCZ and 2847 independent controls of European origin from Spain. A polygenic score analysis was also used to test the overall effect on the SCZ status. One SNP, rs12290811, located in the ODZ4 gene reached statistical significance (p=1.7×10(-4), Allelic odds ratio=1.21), a value very near to those reported in previous GWAS of BPD patients. In addition, 4 SNPs were close to the significant threshold: rs3850333, in the NRXN1 gene; rs6932590, at MHC; rs2314398, located in an intergenic region on chromosome 2; and rs1006737, in the CACNA1C gene. We also found that 74% of the studied SNPs showed the same tendency (risk or protection alleles) previously reported in the original GWAS (p<0.001). Our data strengthen the polygenic component of susceptibility to SCZ. Our findings show ODZ4 as a risk gene for SCZ, emphasizing the existence of common vulnerability in psychosis.
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Affiliation(s)
- José Luis Ivorra
- CIBERSAM, Spain; School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
| | - Olga Rivero
- CIBERSAM, Spain; Division of Molecular Psychiatry, Laboratory of Translational Neuroscience, Department of Psychiatry, Psychosomatics and Psychotherapy, University of Würzburg, Würzburg, Germany
| | - Javier Costas
- Instituto de Investigación Sanitaria (IDIS) de Santiago de Compostela, Servizo Galego de Saúde (SERGAS), Complexo Hospitalario Universitario de Santiago (CHUS), Spain
| | | | - Manuel Arrojo
- Instituto de Investigación Sanitaria (IDIS) de Santiago de Compostela, Servizo Galego de Saúde (SERGAS), Complexo Hospitalario Universitario de Santiago (CHUS), Spain
| | - Ramón Ramos-Ríos
- Instituto de Investigación Sanitaria (IDIS) de Santiago de Compostela, Servizo Galego de Saúde (SERGAS), Complexo Hospitalario Universitario de Santiago (CHUS), Spain
| | - Angel Carracedo
- Grupo de Medicina Xenómica, Fundación Pública Galega de Medicina Xenómica, Universidad de Santiago de Compostela, CIBERER, Spain
| | - Tomas Palomo
- CIBERSAM, Spain; Instituto de Investigación Hospital, Universitario 12 de Octubre, Psychiatry Department, Madrid, Spain
| | - Roberto Rodriguez-Jimenez
- CIBERSAM, Spain; Instituto de Investigación Hospital, Universitario 12 de Octubre, Psychiatry Department, Madrid, Spain
| | - Jorge Cervilla
- CIBERSAM, Spain; Centre for Public Mental Health, Health Services and Population Research Department, Institute of Psychiatry, King's College London, London, United Kingdom
| | - Blanca Gutiérrez
- CIBERSAM, Spain; Universidad de Granada, Facultad de Medicina, Granada, Spain
| | - Esther Molina
- CIBERSAM, Spain; Universidad de Granada, Facultad de Medicina, Granada, Spain
| | - Celso Arango
- CIBERSAM, Spain; Child and Adolescent Psychiatry Department, Instituto de Investigación Sanitaria Gregorio Marañón, IiSGM, Hospital General Universitario Gregorio Marañón, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Mar Alvarez
- CIBERSAM, Spain; Child and Adolescent Psychiatry Department, Instituto de Investigación Sanitaria Gregorio Marañón, IiSGM, Hospital General Universitario Gregorio Marañón, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Juan C Pascual
- CIBERSAM, Spain; Department of Psychiatry, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Víctor Pérez
- CIBERSAM, Spain; Institut de Neuropsiquiatria i Addicions, Hospital del Mar, Universitat Autònoma de Barcelona, Barcelona, Spain
| | | | | | - Julio Bobes
- CIBERSAM, Spain; Área de Psiquiatría, Universidad de Oviedo, Oviedo, Spain
| | | | - Iñaki Zorrilla
- CIBERSAM, Spain; Hospital Santiago Apostol de Vitoria, Vitoria, Spain
| | | | - Miguel Bernardo
- CIBERSAM, Spain; Schizophrenia Unit, Neuroscience Institute, Hospital Clinic of Barcelona, Department of Psychiatry and Clinical Psychobiology, University of Barcelona, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona. Spain
| | - Enrique Baca-García
- CIBERSAM, Spain; Department of Psychiatry, Jimenez Diaz Foundation, Universidad Autonoma de Madrid, Spain
| | - José Carlos González
- CIBERSAM, Spain; Hospital Clinic, University of Valencia, INCLIVA, Valencia, Spain
| | - Janet Hoenicka
- CIBERSAM, Spain; Instituto de Investigación Hospital, Universitario 12 de Octubre, Psychiatry Department, Madrid, Spain; Centro de Investigación Príncipe Felipe, Valencia, Spain
| | - María Dolores Moltó
- CIBERSAM, Spain; Departamento de Genética, Facultad de Biología, Universidad de Valencia, INCLIVA, Spain
| | - Julio Sanjuán
- CIBERSAM, Spain; Hospital Clinic, University of Valencia, INCLIVA, Valencia, Spain.
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22
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Affiliation(s)
- E Vieta
- Bipolar Disorder Unit, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, CIBERSAM, Barcelona, Catalonia, Spain.
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23
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Chen HM, DeLong CJ, Bame M, Rajapakse I, Herron TJ, McInnis MG, O'Shea KS. Transcripts involved in calcium signaling and telencephalic neuronal fate are altered in induced pluripotent stem cells from bipolar disorder patients. Transl Psychiatry 2014; 4:e375. [PMID: 25116795 PMCID: PMC3966040 DOI: 10.1038/tp.2014.12] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 01/09/2014] [Indexed: 12/12/2022] Open
Abstract
Bipolar disorder (BP) is a chronic psychiatric condition characterized by dynamic, pathological mood fluctuations from mania to depression. To date, a major challenge in studying human neuropsychiatric conditions such as BP has been limited access to viable central nervous system tissue to examine disease progression. Patient-derived induced pluripotent stem cells (iPSCs) now offer an opportunity to analyze the full compliment of neural tissues and the prospect of identifying novel disease mechanisms. We have examined changes in gene expression as iPSC derived from well-characterized patients differentiate into neurons; there was little difference in the transcriptome of iPSC, but BP neurons were significantly different than controls in their transcriptional profile. Expression of transcripts for membrane bound receptors and ion channels was significantly increased in BP-derived neurons compared with controls, and we found that lithium pretreatment of BP neurons significantly altered their calcium transient and wave amplitude. The expression of transcription factors involved in the specification of telencephalic neuronal identity was also altered. Control neurons expressed transcripts that confer dorsal telencephalic fate, whereas BP neurons expressed genes involved in the differentiation of ventral (medial ganglionic eminence) regions. Cells were responsive to dorsal/ventral patterning cues, as addition of the Hedgehog (ventral) pathway activator purmorphamine or a dorsalizing agent (lithium) stimulated expression of NKX2-1 (ventral identity) or EMX2 (dorsal) in both groups. Cell-based models should have a significant impact on our understanding of the genesis and therefore treatment of BP; the iPSC cell lines themselves provide an important resource for comparison with other neurodevelopmental disorders.
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Affiliation(s)
- H M Chen
- Department of Psychiatry, University of Michigan Medical School, Ann Arbor, MI, USA
| | - C J DeLong
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - M Bame
- Department of Psychiatry, University of Michigan Medical School, Ann Arbor, MI, USA
| | - I Rajapakse
- Center for Computational Medicine & Bioinformatics, Department of Mathematics, University of Michigan Medical School, Ann Arbor, MI, USA
| | - T J Herron
- Department of Cardiology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - M G McInnis
- Department of Psychiatry, University of Michigan Medical School, Ann Arbor, MI, USA
| | - K S O'Shea
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, USA,Department of Cell and Developmental Biology, University of Michigan Medical School, 3051 BSRB, 109 Zina Pitcher Pl, Ann Arbor, MI 48109, USA. E-mail:
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24
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Abstract
Bipolar disorder is a common, complex genetic disorder, but the mode of transmission remains to be discovered. Many researchers assume that common genomic variants carry some risk for manifesting the disease. The research community has celebrated the first genome-wide significant associations between common single nucleotide polymorphisms (SNPs) and bipolar disorder. Currently, attempts are under way to translate these findings into clinical practice, genetic counseling, and predictive testing. However, some experts remain cautious. After all, common variants explain only a very small percentage of the genetic risk, and functional consequences of the discovered SNPs are inconclusive. Furthermore, the associated SNPs are not disease specific, and the majority of individuals with a "risk" allele are healthy. On the other hand, population-based genome-wide studies in psychiatric disorders have rediscovered rare structural variants and mutations in genes, which were previously known to cause genetic syndromes and monogenic Mendelian disorders. In many Mendelian syndromes, psychiatric symptoms are prevalent. Although these conditions do not fit the classic description of any specific psychiatric disorder, they often show nonspecific psychiatric symptoms that cross diagnostic boundaries, including intellectual disability, behavioral abnormalities, mood disorders, anxiety disorders, attention deficit, impulse control deficit, and psychosis. Although testing for chromosomal disorders and monogenic Mendelian disorders is well established, testing for common variants is still controversial. The standard concept of genetic testing includes at least three broad criteria that need to be fulfilled before new genetic tests should be introduced: analytical validity, clinical validity, and clinical utility. These criteria are currently not fulfilled for common genomic variants in psychiatric disorders. Further work is clearly needed before genetic testing for common variants in psychiatric disorders should be established.
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Affiliation(s)
- Berit Kerner
- Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, USA
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25
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Abstract
From a neurobiological perspective there is no such thing as bipolar disorder. Rather, it is almost certainly the case that many somewhat similar, but subtly different, pathological conditions produce a disease state that we currently diagnose as bipolarity. This heterogeneity - reflected in the lack of synergy between our current diagnostic schema and our rapidly advancing scientific understanding of the condition - limits attempts to articulate an integrated perspective on bipolar disorder. However, despite these challenges, scientific findings in recent years are beginning to offer a provisional "unified field theory" of the disease. This theory sees bipolar disorder as a suite of related neurodevelopmental conditions with interconnected functional abnormalities that often appear early in life and worsen over time. In addition to accelerated loss of volume in brain areas known to be essential for mood regulation and cognitive function, consistent findings have emerged at a cellular level, providing evidence that bipolar disorder is reliably associated with dysregulation of glial-neuronal interactions. Among these glial elements are microglia - the brain's primary immune elements, which appear to be overactive in the context of bipolarity. Multiple studies now indicate that inflammation is also increased in the periphery of the body in both the depressive and manic phases of the illness, with at least some return to normality in the euthymic state. These findings are consistent with changes in the hypothalamic-pituitary-adrenal axis, which are known to drive inflammatory activation. In summary, the very fact that no single gene, pathway, or brain abnormality is likely to ever account for the condition is itself an extremely important first step in better articulating an integrated perspective on both its ontological status and pathogenesis. Whether this perspective will translate into the discovery of innumerable more homogeneous forms of bipolarity is one of the great questions facing the field and one that is likely to have profound treatment implications, given that fact that such a discovery would greatly increase our ability to individualize - and by extension, enhance - treatment.
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Affiliation(s)
- Vladimir Maletic
- Department of Neuropsychiatry and Behavioral Sciences, University of South Carolina School of Medicine , Columbia, SC , USA
| | - Charles Raison
- Department of Psychiatry, University of Arizona , Tucson, AZ , USA ; Norton School of Family and Consumer Sciences, College of Agriculture and Life Sciences, University of Arizona , Tucson, AZ , USA
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26
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Zheng F, Zhang Y, Xie W, Li W, Jin C, Mi W, Wang F, Ma W, Ma C, Yang Y, Du B, Li K, Liu C, Wang L, Lu T, Zhang H, Wang Y, Lu L, Lv L, Zhang D, Yue W. Further evidence for genetic association of CACNA1C and schizophrenia: new risk loci in a Han Chinese population and a meta-analysis. Schizophr Res 2014; 152:105-10. [PMID: 24355530 DOI: 10.1016/j.schres.2013.12.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 12/02/2013] [Accepted: 12/03/2013] [Indexed: 01/08/2023]
Abstract
CACNA1C (12p13.3) has been implicated as a susceptibility gene for schizophrenia by several replicated genome wide association studies. While these results have been consistent among studies in European populations, the findings in East Asian populations have varied. To test whether CACNA1C is a risk gene for schizophrenia, we conducted a case-control study in 5897 schizophrenic patients and 6323 healthy control subjects selected from Han Chinese population. Our study replicated the positive associations of rs1006737 (P=0.0108, OR=1.16, 95% CI: 1.03-1.29) and rs1024582 (P=0.0062, OR=1.18, 95% CI: 1.05-1.33), and identified a novel risk locus, rs2007044 (P=0.0053, OR=1.08, 95% CI: 1.02-1.14). A meta-analysis of rs1006737 combining our study and previous studies was conducted in a total of 8222 schizophrenia cases and 24,661 healthy controls. In the meta-analysis, the association between rs1006737 and schizophrenia remained significant (OR=1.14, 95% CI: 1.07-1.22, P=0.0001). Stratified analysis showed no heterogeneity between East Asian and European ancestries (χ(2)[1]=0.07, P=0.795), and the difference in pooled ORs between ancestries was not significant (Z=0.25, P=0.801). Our results provide further support for associations of rs1006737 and rs1024582 with schizophrenia, identify a new risk locus rs2007044 in a Han Chinese population, and further establish CACNA1C as an important susceptibility gene for the disease across world populations.
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Affiliation(s)
- Fanfan Zheng
- Institute of Mental Health, Peking University, Beijing 100191, China; Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing 100191, China
| | - Yanling Zhang
- Institute of Mental Health, Peking University, Beijing 100191, China; Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing 100191, China; Department of Nephrology, Beijing Aerospace General Hospital, Beijing 100076, China
| | - Wuxiang Xie
- Department of Epidemiology, Capital Medical University Affiliated Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing 100029, China
| | - Wenqiang Li
- Department of Psychiatry of the Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453002, China; Henan Mental Hospital, Henan Key Lab of Biological Psychiatry, Xinxiang, Henan 453002, China
| | - Chao Jin
- Jinzhou Kangning Hospital, Jinzhou, Liaoning 121013, China
| | - Weifeng Mi
- Institute of Mental Health, Peking University, Beijing 100191, China; Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing 100191, China
| | - Fang Wang
- Institute of Mental Health, Peking University, Beijing 100191, China; Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing 100191, China
| | - Wenbin Ma
- Jinzhou Kangning Hospital, Jinzhou, Liaoning 121013, China
| | - Cuicui Ma
- Jinzhou Kangning Hospital, Jinzhou, Liaoning 121013, China
| | - Yongfeng Yang
- Department of Psychiatry of the Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453002, China; Henan Mental Hospital, Henan Key Lab of Biological Psychiatry, Xinxiang, Henan 453002, China
| | - Bo Du
- Hebei Mental Health Center, Baoding, Hebei 071000, China
| | - Keqing Li
- Hebei Mental Health Center, Baoding, Hebei 071000, China
| | - Chenxing Liu
- Institute of Mental Health, Peking University, Beijing 100191, China; Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing 100191, China
| | - Lifang Wang
- Institute of Mental Health, Peking University, Beijing 100191, China; Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing 100191, China
| | - Tianlan Lu
- Institute of Mental Health, Peking University, Beijing 100191, China; Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing 100191, China
| | - Hongyan Zhang
- Institute of Mental Health, Peking University, Beijing 100191, China; Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing 100191, China
| | - Yun Wang
- Neuroscience Research Institute and Department of Neurobiology, The Key Laboratory for Neuroscience of the Ministry of Education and Health, Peking University Health Science Center, Beijing 100191, China
| | - Lin Lu
- National Institute on Drug Dependence, Peking University, Beijing 100191, China
| | - Luxian Lv
- Department of Psychiatry of the Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453002, China; Henan Mental Hospital, Henan Key Lab of Biological Psychiatry, Xinxiang, Henan 453002, China
| | - Dai Zhang
- Institute of Mental Health, Peking University, Beijing 100191, China; Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing 100191, China; Peking-Tsinghua Center for Life Sciences, Beijing 100871, China; PKU-IDG/McGoven Institute for Brain Research, Peking University, Beijing 100871, China
| | - Weihua Yue
- Institute of Mental Health, Peking University, Beijing 100191, China; Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing 100191, China.
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27
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Szczepankiewicz A. Evidence for single nucleotide polymorphisms and their association with bipolar disorder. Neuropsychiatr Dis Treat 2013; 9:1573-82. [PMID: 24143106 PMCID: PMC3798233 DOI: 10.2147/ndt.s28117] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Bipolar disorder (BD) is a complex disorder with a number of susceptibility genes and environmental risk factors involved in its pathogenesis. In recent years, huge progress has been made in molecular techniques for genetic studies, which have enabled identification of numerous genomic regions and genetic variants implicated in BD across populations. Despite the abundance of genetic findings, the results have often been inconsistent and not replicated for many candidate genes/single nucleotide polymorphisms (SNPs). Therefore, the aim of the review presented here is to summarize the most important data reported so far in candidate gene and genome-wide association studies. Taking into account the abundance of association data, this review focuses on the most extensively studied genes and polymorphisms reported so far for BD to present the most promising genomic regions/SNPs involved in BD. The review of association data reveals evidence for several genes (SLC6A4/5-HTT [serotonin transporter gene], BDNF [brain-derived neurotrophic factor], DAOA [D-amino acid oxidase activator], DTNBP1 [dysbindin], NRG1 [neuregulin 1], DISC1 [disrupted in schizophrenia 1]) to be crucial candidates in BD, whereas numerous genome-wide association studies conducted in BD indicate polymorphisms in two genes (CACNA1C [calcium channel, voltage-dependent, L type, alpha 1C subunit], ANK3 [ankyrin 3]) replicated for association with BD in most of these studies. Nevertheless, further studies focusing on interactions between multiple candidate genes/SNPs, as well as systems biology and pathway analyses are necessary to integrate and improve the way we analyze the currently available association data.
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Affiliation(s)
- Aleksandra Szczepankiewicz
- Laboratory of Molecular and Cell Biology, Poznan University of Medical Sciences, Poznan, Poland ; Department of Psychiatric Genetics, Poznan University of Medical Sciences, Poznan, Poland
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