Dataset Information

Prevention of Early Substance Use Mediates, and Variation at SLC6A4 Moderates, SAAF Intervention Effects on OXTR Methylation.

ABSTRACT: The Strong African American Family (SAAF) program has been shown to have a variety of short and long-term benefits for participating youth and families. However, biological mechanisms potentially influencing long-term effects on resilience in young adulthood have not been examined. In the current investigation, we examine the effects of SAAF on methylation of the OXTR gene in young adulthood, focusing on a regulatory region previously identified to be both responsive to stress and implicated in resilience. Using the subsample of participants from the original study for whom methylation data was available (N?=?388), we replicated the previously reported G?×?E effect on prevention of early substance use and then examined whether there would also be a moderated effect on OXTR methylation in early adulthood, with "s" allele carriers, but not "LL" participants, showing a significant indirect effect of SAAF on OXTR methylation. Results suggest that for susceptible youth (i.e., "s" allele carriers), preventive intervention may "get under the skin," in a manner potentially beneficial for long-term outcomes. Implications for examination of OXTR methylation in future prevention research are discussed.

SUBMITTER: Beach SRH

PROVIDER: S-EPMC5360555 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature

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Prevention of Early Substance Use Mediates, and Variation at SLC6A4 Moderates, SAAF Intervention Effects on OXTR Methylation.

Beach Steven R H SRH Lei Man Kit MK Brody Gene H GH Philibert Robert A RA

Prevention science : the official journal of the Society for Prevention Research 20180101 1

The Strong African American Family (SAAF) program has been shown to have a variety of short and long-term benefits for participating youth and families. However, biological mechanisms potentially influencing long-term effects on resilience in young adulthood have not been examined. In the current investigation, we examine the effects of SAAF on methylation of the OXTR gene in young adulthood, focusing on a regulatory region previously identified to be both responsive to stress and implicated in ...[more]

PMID: 27655391

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Project description:A number of studies have reported associations between the serotonin transporter gene (SLC6A4) and alcohol, heroin, cocaine, or methamphetamine abuse. Other studies have yielded contrary results. There are a number of reasons for non-replication, including inadequate statistical power, population stratification, and poor phenotype definition. This study was to test the association using a meta-analytic approach across a variety of racial and ethnic populations. Using the genotype data of 55 studies (7999 cases, 8264 controls, and 676 families or parent-offspring trios) published in the past 15 years, we have conducted comprehensive meta-analyses to examine the associations of the 5-HTTLPR and STin2 polymorphisms with substance use disorder. The meta-analyses support the associations of 5-HTTLPR with alcohol, heroin, cocaine, and methamphetamine dependence and abuse (eg, the smallest P-values were 0.0058 with odds ratio (OR)=0.54 (0.35, 0.84); 0.0024 with OR=0.77 (0.66, 0.91); 0.018 with OR=1.38 (1.06, 1.81); and 0.028 with OR=0.46 (0.23, 0.92) for alcohol, heroin, cocaine, and methamphetamine dependence/abuse, respectively). When all the phenotypes are combined, the P-value was 0.0006 with OR=0.86 (0.78, 0.94) in the combined European, Asian, and Mexican populations and P-value was 0.0028 with OR=1.41 (1.13, 1.78) in the African populations. Evidence of significant associations was also identified in other subgroup analyses regarding differently combined substance and populations. The effect sizes of 5-HTTLPR were comparable among the European, Asian, and Mexican populations, however, the risk allele was more frequent in Asians than in Europeans and Mexicans. The opposite directions of risk allele in African population might be driven by the opposite directions of risk allele in cocaine dependence. This meta-analysis supports that the association of the SLC6A4 gene with substance use disorder varies depending on substances with different risk allele frequencies in the multi-cultural populations. Further studies using larger sample size are warranted.

Project description:Implementation support interventions have helped organizations implement programs with quality and obtain intended outcomes. For example, a recent randomized controlled trial called Preparing to Run Effective Programs (PREP) showed that an implementation support intervention called Getting To Outcomes (GTO) improved implementation of an evidence-based substance use prevention program (CHOICE) run in community-based settings. However, more information is needed on how these interventions affect organizational barriers and facilitators of implementation. This paper aims to identify differences in implementation facilitators and barriers in sites conducting a substance use prevention program with and without GTO. PREP is a cluster-randomized controlled trial testing GTO, a two-year implementation support intervention, in Boys & Girls Clubs. The trial compares 15 Boys & Girls Club sites implementing CHOICE (control group), a five-session evidence-based alcohol and drug prevention program, with 14 Boys & Girls Club sites implementing CHOICE supported by GTO (intervention group). All sites received CHOICE training. Intervention sites also received GTO manuals, training, and onsite technical assistance to help practitioners complete implementation best practices specified by GTO (i.e., GTO steps). During the first year, technical assistance providers helped the intervention group adopt, plan, and deliver CHOICE, and then evaluate and make quality improvements to CHOICE implementation using feedback reports summarizing their data. Following the second year of CHOICE and GTO implementation, all sites participated in semi-structured interviews to identify barriers and facilitators to CHOICE implementation using the Consolidated Framework for Implementation Research (CFIR). This paper assesses the extent to which these facilitators and barriers differed between intervention and control group. Intervention sites had significantly higher average ratings than control sites for two constructs from the CFIR process domain: planning and reflecting and evaluating. At the same time, intervention sites had significantly lower ratings on the culture and available resources constructs. Findings suggest that strong planning, evaluation, and reflection-likely improved with GTO support-can facilitate implementation even in the face of perceptions of a less desirable implementation climate. These findings highlight that implementation support, such as GTO, is likely to help low-resourced community-based organizations improve program delivery through a focus on implementation processes. TRIAL REGISTRATION: This project is registered at ClinicalTrials.gov with number NCT02135991 (URL: https://clinicaltrials.gov/show/NCT02135991). The trial was first registered May 12, 2014.

Dataset Information

Prevention of Early Substance Use Mediates, and Variation at SLC6A4 Moderates, SAAF Intervention Effects on OXTR Methylation.

Publications

Prevention of Early Substance Use Mediates, and Variation at SLC6A4 Moderates, SAAF Intervention Effects on OXTR Methylation.

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