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Eur Neuropsychopharmacol. 2019 Jun;29(6):795-802. doi: 10.1016/j.euroneuro.2019.04.004. Epub 2019 May 10.

Genome-wide analysis of emotional lability in adult attention deficit hyperactivity disorder (ADHD).

Author information

1
Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain; Biomedical Network Research Centre on Mental Health (CIBERSAM), Madrid, Spain; Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain.
2
Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain; Psychiatric Genetics Unit, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain.
3
Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain; Biomedical Network Research Centre on Mental Health (CIBERSAM), Madrid, Spain; Psychiatric Genetics Unit, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain.
4
Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain; Psychiatric Genetics Unit, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain; Grup de Coagulopaties Congènites, Banc de Sang i Teixits, Barcelona, Catalonia, Spain.
5
Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain; Biomedical Network Research Centre on Mental Health (CIBERSAM), Madrid, Spain; Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain; Psychiatric Genetics Unit, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain.
6
Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain; Biomedical Network Research Centre on Mental Health (CIBERSAM), Madrid, Spain; Psychiatric Genetics Unit, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain. Electronic address: maria.soler@vhir.org.
7
Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain; Biomedical Network Research Centre on Mental Health (CIBERSAM), Madrid, Spain; Psychiatric Genetics Unit, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain. Electronic address: marta.ribases@vhir.org.

Abstract

Emotional lability is strongly associated with Attention Deficit Hyperactivity Disorder (ADHD), represents a major source of impairment and predicts poor clinical outcome in ADHD. Given that no specific genes with a role in the co-occurrence of both conditions have been described, we conducted a GWAS of emotional lability in 563 adults with ADHD. Despite not reaching genome-wide significance, the results highlighted genes related with neurotransmission, cognitive function and a wide range of psychiatric disorders that have emotional lability as common clinical feature. By constructing polygenic risk scores on mood instability in the UK Biobank sample and assessing their association with emotional lability in our clinical dataset, we found suggestive evidence of common genetic variation contributing to emotional lability in general population and in clinically diagnosed ADHD. Although not conclusive, these tentative results are in agreement with previous studies that suggest emotion dysregulation as a transdiagnostic construct and highlight the need for further investigation to disentangle the genetic basis of mood instability in ADHD and co-occurring psychiatric disorders.

KEYWORDS:

ADHD; Adult; Emotional lability; GWAS; Genetics

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