Cited by 112Genetic Associations and EpidemiologySchizophrenia research and treatmentSmoking Behavior and Cessation

Polygenic risk scores for schizophrenia and bipolar disorder associate with addiction

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Reginsson, Gunnar W., Ingason, Andres, Euesden, Jack, Bjornsdottir, Gyda, Olafsson, Sigurgeir, Sigurdsson, Engilbert, Oskarsson, Hogni, Tyrfingsson, Thorarinn +7 more·2018·Addiction Biology

Abstract

We use polygenic risk scores (PRSs) for schizophrenia (SCZ) and bipolar disorder (BPD) to predict smoking, and addiction to nicotine, alcohol or drugs in individuals not diagnosed with psychotic disorders. Using PRSs for 144 609 subjects, including 10 036 individuals admitted for in‐patient addiction treatment and 35 754 smokers, we find that diagnoses of various substance use disorders and smoking associate strongly with PRSs for SCZ (P = 5.3 × 10−50–1.4 × 10−6) and BPD (P = 1.7 × 10−9–1.9 × 10−3), showing shared genetic etiology between psychosis and addiction. Using standardized scores for SCZ and BPD scaled to a unit increase doubling the risk of the corresponding disorder, the odds ratios for alcohol and substance use disorders range from 1.19 to 1.31 for the SCZ‐PRS, and from 1.07 to 1.29 for the BPD‐PRS. Furthermore, we show that as regular smoking becomes more stigmatized and less prevalent, these biological risk factors gain importance as determinants of the behavior.

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Crossref · 10.1111/adb.12496

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  • The association between psychiatric disorders and SUDs likely reflects bidirectional links, such that having a mental disorder increases risk of maladaptive drug use to self-medicate, and having a SUD increases risk for developing a mental disorder, as drugs affect neurocircuits relevant to other mental disorders.

    “These associations are likely to reflect bidirectional links, such that hav ing a mental disorder increases risk of maladaptive use of drugs to self- medicate, and having a SUD increases risk for developing a mental disorder, as drugs affect neurocircuits relevant to other mental disorders.”

    From Substance use disorders: a comprehensive update of classification, epidemiology, neurobiology, clinical aspects, treatment and prevention (2023) · cites this paper as [123]

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  • The presence of a psychiatric disorder, including mood, anxiety, psychotic and personality disorders, and ADHD, is associated with an increased risk for SUDs.

    “The presence of a psychiatric disorder - including mood, anxi ety, psychotic and personality disorders, and ADHD - is associ ated with an increased risk for SUDs.”

    From Substance use disorders: a comprehensive update of classification, epidemiology, neurobiology, clinical aspects, treatment and prevention (2023) · cites this paper as [123]

    The Introduction (page not provided) reports that substance use disorders frequently co-occur with schizophrenia and bipolar disorder, supporting the claim for those conditions. It does not address anxiety disorders, personality disorders, or ADHD, and it cautions that the direction of the relationship is unclear. The Results concern genetic risk scores rather than the presence of a psychiatric diagnosis. (LLM, conf=0.88)

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  • Common genetic and environmental risk factors for both SUDs and mental disorders contribute to their high degree of comorbidity.

    “Common genetic and environmental risk fac tors for both SUDs and mental disorders also contribute to their high degree of comorbidity 121- 123 .”

    From Substance use disorders: a comprehensive update of classification, epidemiology, neurobiology, clinical aspects, treatment and prevention (2023) · cites this paper as [123]

    The Discussion (page unavailable) supports shared genetic contributions to comorbidity between addiction and schizophrenia or bipolar disorder. It does not establish that shared environmental risk factors contribute to that comorbidity, and its findings concern those specific disorders rather than mental disorders generally. (LLM, conf=0.87)

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  • SUDs are associated with an increased risk for a mental disorder.

    “On the other hand, SUDs are also associated with increased risk for a mental disorder.”

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Authors
Reginsson, G. W., Ingason, A., Euesden, J., Bjornsdottir, G., Olafsson, S., Sigurdsson, E., Oskarsson, H., Tyrfingsson, T., Runarsdottir, V., Hansdottir, I., Steinberg, S., Stefansson, H., Gudbjartsson, D. F., Thorgeirsson, T. E., & Stefansson, K.
Affiliations
  • deCODE Genetics (Iceland) (IS)
  • deCODE genetics/Amgen Iceland
  • King's College London (GB)
  • Department of Psychiatry Landspitalinn University Hospital Iceland
  • Humus Reykjavik Iceland
  • SAA‐National Center of Addiction Medicine Iceland
Venue
Addiction Biology
Publisher
Wiley
Published
2017-02-23
Volume
23
Issue
1
Pages
485-492
ISSN
  • 1355-6215 (ISSN-L)
  • 1369-1600
OpenAlex
W2591133298
Cited by
112
References
30
Citations by year
2026: 5 · 2025: 11 · 2024: 10 · 2023: 12 · 2022: 9 · 2021: 14 · 2020: 9 · 2019: 22 · 2018: 15 · 2017: 5
FWCI
9.23
Type
journal article
Language
en
Open access
Locations
  • Addiction Biology (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (submittedVersion, cc-by-nc-nd)
  • Opin vísindi (Opin vísindi) (submittedVersion, cc-by-nc-nd)
  • Hirsla (Landspítali University Hospital) (submittedVersion)
Funders
National Institute on Drug Abuse (R01‐DA017932)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Health Sciences › Medicine › Physiology › Smoking Behavior and Cessation
Keywords
polygenic risk score, schizophrenia, bipolar disorder, addiction, substance use disorders, smoking, nicotine dependence, alcoholism, shared genetic etiology, psychosis, inpatient addiction treatment, smoking stigma
MeSH terms
Cigarette Smoking, Aged, Aged, 80 and over, Alcoholism, Bipolar Disorder, Female, Humans, Iceland, Male, Middle Aged, Risk, Schizophrenia, Tobacco Use Disorder, Odds Ratio, Substance-Related Disorders, Multifactorial Inheritance

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