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Arenella M, Matuleviciute R, Tamouza R, Leboyer M, McAlonan G, Bralten J, Murphy D. Immunogenetics of autism spectrum disorder: A systematic literature review. Brain Behav Immun 2023; 114:488-499. [PMID: 37717669 DOI: 10.1016/j.bbi.2023.09.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 09/11/2023] [Accepted: 09/13/2023] [Indexed: 09/19/2023] Open
Abstract
The aetiology of autism spectrum disorder (ASD) is complex and, partly, accounted by genetic factors. Nonetheless, the genetic underpinnings of ASD are poorly defined. The presence of immune dysregulations in autistic individuals, and their families, supports a role of the immune system and its genetic regulators. Albeit immune responses belong either to the innate or adaptive arms, the overall immune system genetics is broad, and encompasses a multitude of functionally heterogenous pathways which may have different influences on ASD. Hence, to gain insights on the immunogenetic underpinnings of ASD, we conducted a systematic literature review of previous immune genetic and transcription studies in ASD. We defined a list of immune genes relevant to ASD and explored their neuro-immune function. Our review confirms the presence of immunogenetic variability in ASD, accounted by inherited variations of innate and adaptive immune system genes and genetic expression changes in the blood and post-mortem brain of autistic individuals. Besides their immune function, the identified genes control neurodevelopment processes (neuronal and synaptic plasticity) and are highly expressed in pre/peri-natal periods. Hence, our synthesis bolsters the hypothesis that perturbation in immune genes may contribute to ASD by derailing the typical trajectory of neurodevelopment. Our review also helped identifying some of the limitations of prior immunogenetic research in ASD. Thus, alongside clarifying the neurodevelopment role of immune genes, we outline key considerations for future work into the aetiology of ASD and possible novel intervention targets.
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Affiliation(s)
- Martina Arenella
- Department of Forensic and Neurodevelopmental Science, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom; Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands; Donders Institute of Brain, Cognition and Behavior, Radboud University, Nijmegen, The Netherlands.
| | - Rugile Matuleviciute
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom; MRC Centre for Neurodevelopmental Disorders, King's College London, London, United Kingdom
| | - Ryad Tamouza
- University Paris Est Créteil (UPEC), INSERM, IMRB, Translational Neuropsychiatry Lab, AP-HP, Department of Addiction and Psychiatry (DMU IMPACT, FHU ADAPT), France; Fondation FondaMental, F-94010 Créteil, France
| | - Marion Leboyer
- University Paris Est Créteil (UPEC), INSERM, IMRB, Translational Neuropsychiatry Lab, AP-HP, Department of Addiction and Psychiatry (DMU IMPACT, FHU ADAPT), France; Fondation FondaMental, F-94010 Créteil, France
| | - Grainne McAlonan
- Department of Forensic and Neurodevelopmental Science, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom; South London and Maudsley NHS Foundation Trust, London, United Kingdom
| | - Janita Bralten
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands; Donders Institute of Brain, Cognition and Behavior, Radboud University, Nijmegen, The Netherlands
| | - Declan Murphy
- Department of Forensic and Neurodevelopmental Science, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom; South London and Maudsley NHS Foundation Trust, London, United Kingdom
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Nuñez-Rios DL, Chaskel R, Lopez A, Galeano L, Lattig MC. The role of 5-HTTLPR in autism spectrum disorder: New evidence and a meta-analysis of this polymorphism in Latin American population with psychiatric disorders. PLoS One 2020; 15:e0235512. [PMID: 32614901 PMCID: PMC7332001 DOI: 10.1371/journal.pone.0235512] [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: 04/17/2020] [Accepted: 06/16/2020] [Indexed: 01/15/2023] Open
Abstract
The autism spectrum disorder (ASD) is a complex disorder encompassing a broad phenotypic and genotypic variability. The short (S)/long (L) 5-HTTLPR polymorphism has a functional role in the regulation of extracellular serotonin levels and both alleles have been associated to ASD. Most studies including European, American, and Asian populations have suggested an ethnical heterogeneity of this polymorphism; however, the short/long frequencies from Latin American population have been under-studied in recent meta-analysis. Here, we evaluated the 5-HTTLPR polymorphism in Colombian individuals with idiopathic ASD and reported a non-preferential S or L transmission and a non-association with ASD risk or symptom severity. Moreover, to recognize the allelic frequencies of an under-represented population we also recovered genetic studies from Latin American individuals and compared these frequencies with frequencies from other ethnicities. Results from meta-analysis suggest that short/long frequencies in Latin American are similar to those reported in Caucasian population but different to African and Asian regions.
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Affiliation(s)
- D. L. Nuñez-Rios
- Departamento de Ciencias Biológicas, Universidad de los Andes, Bogotá, Colombia
| | - R. Chaskel
- Instituto Colombiano del Sistema Nervioso Clínica Monserrat, Bogotá, Colombia
- Fundación Santa Fe de Bogotá, Bogotá, Colombia
| | - A. Lopez
- Fundación Santa Fe de Bogotá, Bogotá, Colombia
- Servicios Integrales en Genética (SIGEN) alianza Fundación Santa Fe de Bogotá – Universidad de los Andes, Bogotá, Colombia
| | - L. Galeano
- Departamento de Ciencias Biológicas, Universidad de los Andes, Bogotá, Colombia
| | - M. C. Lattig
- Departamento de Ciencias Biológicas, Universidad de los Andes, Bogotá, Colombia
- Servicios Integrales en Genética (SIGEN) alianza Fundación Santa Fe de Bogotá – Universidad de los Andes, Bogotá, Colombia
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Wang M, Tian X, Zhang W. Interactions between the combined genotypes of 5-HTTLPR and BDNF Val66Met polymorphisms and parenting on adolescent depressive symptoms: A three-year longitudinal study. J Affect Disord 2020; 265:104-111. [PMID: 32090731 DOI: 10.1016/j.jad.2020.01.064] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/09/2020] [Accepted: 01/14/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND The importance of multiple genes-environment interaction (G × E) has been highlighted in studies on depressive symptoms. 5-HTTLPR and BDNF Val66Met polymorphisms, with functional interconnection, have been implicated in the pathophysiology of depressive symptoms. However, little is understood about whether the interaction of 5-HTTLPR, BDNF Val66Met and parenting fits better with the epistatic or cumulative manner. METHODS 865 adolescents (T1: Mage = 12.32, 50.2% girls) were included in a three-year interval longitudinal design. Standardized questionares about parenting and depressive symptoms were collected. Saliva samples were collected for genotyping. RESULTS Neither the concurrent nor longitudinal interaction of 5-HTTLPR, BDNF Val66Met and parenting (G × G × E) showed significant effects on depressive symptoms. The interaction between cumulative genotypes and positive parenting (CG × E) was significant, with the strong differential susceptibility model, for depressive symptoms concurrently but not longitudinally after statistical correction. Adolescents who carried 3 (i.e. SS and Val/Met, L allele and Val/Val) and 4 (i.e. SS and Val/Val), not 1 (i.e. L allele and Met/Met) or 2 cumulative susceptibility alleles (i.e. SS and Met/Met, L allele and Val/Met), reported fewer depressive symptoms if they had experienced higher levels of positive parenting, and more symptoms under lower levels of positive parenting. LIMITATIONS This study did not examine the 5-HTTLPR triallelic (rs25531) marker and did not include an external sample. CONCLUSIONS The combined effects of 5-HTTLPR and BDNF Val66Met polymorphisms functioned in a manner of cumulative rather than epistatic in response to positive parenting on early adolescent depressive symptoms.
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Affiliation(s)
- Meiping Wang
- Department of Psychology, Shandong Normal University, Jinan 250014, Shandong Province, China
| | - Xiangjuan Tian
- Department of Psychology, Shandong Normal University, Jinan 250014, Shandong Province, China
| | - Wenxin Zhang
- Department of Psychology, Shandong Normal University, Jinan 250014, Shandong Province, China.
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