Adolescence is a critical neurodevelopmental period associated with dramatic increases in rates of substance use. Identifying the pathways to substance use and its effects on adolescent development is critically important, as the effects of substance use during ongoing maturation likely have long-lasting effects on brain functioning and behavioral, health, and psychological outcomes. This Research Project Site application from the Twin Hub of the ABCD-USA Consortium is in response to RFA-DA-15-015; the proposal includes the University of Minnesota (hub leader), Virginia Commonwealth University, Washington University, and the University of Colorado to prospectively determine neurodevelopmental and behavioral predictors and consequences of substance use on children and adolescents. A representative community sample of 800 twin pairs, ages 9-10 years, from four sites whose researchers are leaders in twin research, SU and abuse, and neuroimaging of cognitive and emotional functioning will be tested, together with 700 singletons, contributing to the sample of 11,111 to be collected from 11 hubs across the ABCD-USA Consortium. Participants will undergo a comprehensive baseline assessment, including state-of-the-art brain imaging, comprehensive neuropsychological testing, bioassays, mobile monitoring and careful assessment of substance use, environment, psychopathological symptoms, and social functioning every 2 years. Interim annual interviews and quarterly web-based assessments will provide refined temporal resolution of behaviors, development, and life events with minimal participant burden. These Consortium-wide data obtained during the course of this project will elucidate: 1) effects of substance use patterns on the adolescent brain; 2) effects of substance use on behavioral and health outcomes; 3) bidirectional relationships between psychopathology and substance use patterns; 4) effects of individual genetic, behavioral, neurobiological, and environmental differences on risk profiles and substance use outcomes; and 5) ?gateway interactions? between use of different substances. The Twin Hub proposes to use classic and co-twin control designs to study genetic vs. environmental contributions to adolescent brain/behavioral development and how these contributions predict SU propensity. Using sophisticated growth trajectory modeling techniques, we will also identify the genetic and environmentally- determined consequences of substance use on brain and behavioral development, including the assessment of gene-by-environment interactions. In addition, we will develop biospecimen resources for future studies of genomic, epigenomic, metabolomic and microbiome changes that may influence substance use and its broad health consequences. Specific to this Twin-Hub, we will obtain baseline and follow-up serum, saliva, and in some cases gut microbiota from biological samples. This work enriches the full ABCD-USA Consortium given that disentangling G and E contributions to individual risk for addiction and sensitivity to SU's neurocognitive effects has highly significant public policy and prevention-based implications.

Public Health Relevance

This application describes one of13 research project proposals, part of the ABCD-USA Consortium to study the effects of substance use on the developing brain during adolescence in a total sample of 800 pairs of longitudinally studied monozygotic (MZ) and dizygotic (DZ) twins and 700 singletons, aged 9-10 years at enrollment, and followed longitudinally. Each assessment will include clinical interviews, neurocognitive testing, and structural and functional MRI brain scans. This Twin Hub has the ability to powerfully address causal effects of substance use on neural and behavioral outcomes during adolescence and into adulthood through its parsing of genetic and environmental sources of influence on behavior and investigations of twins who are discordant for use. Submitted in response to RFA-DA-15-015 (Adolescent Brain Cognitive Development (ABCD) Study - Research Project Sites (U01)) for the Consortium Proposal ?ABCD-USA? (Consortium Coordinators: Terry Jernigan and Sandra Brown)

Agency
National Institute of Health (NIH)
Institute
National Institute on Drug Abuse (NIDA)
Type
Research Project--Cooperative Agreements (U01)
Project #
3U01DA041120-04S1
Application #
9749566
Study Section
Program Officer
Deeds, Bethany
Project Start
2015-09-30
Project End
2020-05-31
Budget Start
2018-06-01
Budget End
2019-05-31
Support Year
4
Fiscal Year
2018
Total Cost
Indirect Cost
Name
University of Minnesota Twin Cities
Department
Psychology
Type
Schools of Arts and Sciences
DUNS #
555917996
City
Minneapolis
State
MN
Country
United States
Zip Code
55455
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