David J Vandenbergh1, Gabriel L Schlomer2, H Harrington Cleveland3, Alisa E Schink4, Kerry L Hair2, Mark E Feinberg5, Jenae M Neiderhiser6, Mark T Greenberg7, Richard L Spoth8, Cleve Redmond8. 1. Department of Biobehavioral Health, Penn State University, University Park, PA; Institute for the Neurosciences, Penn State University, University Park, PA; Molecular Cellular and Integrative Biosciences Program, Penn State University, University Park, PA; djv4@psu.edu. 2. Department of Biobehavioral Health, Penn State University, University Park, PA; Department of Human Development and Family Studies, Penn State University, University Park, PA; 3. Department of Human Development and Family Studies, Penn State University, University Park, PA; 4. Molecular Cellular and Integrative Biosciences Program, Penn State University, University Park, PA; 5. Bennett Pierce Prevention Research Center, Penn State University, University Park, PA; 6. Department of Psychology, Penn State University, University Park, PA; 7. Department of Human Development and Family Studies, Penn State University, University Park, PA; Bennett Pierce Prevention Research Center, Penn State University, University Park, PA; 8. Partnerships in Prevention Science Institute, Iowa State University, Ames, IA.
Abstract
INTRODUCTION: Prevention intervention programs reduce substance use, including smoking, but not all individuals respond. We tested whether response to a substance use prevention/intervention program varies based upon a set of five markers (rs16969968, rs1948, rs578776, rs588765, and rs684513) within the cluster of nicotinic acetylcholine receptor subunit genes (CHRNA5/A3/B4). METHODS:Participants (N = 424) were randomly assigned to either control condition, or a family-based intervention in grade 6 and a school-based drug preventive intervention in grade 7. Smoking in the past month was assessed in grades 9-12 using a four-point scale (0 = never smoked, 1 = smoked but not in last month, 2 = one or a few times, 3 = about once a week or more). RESULTS: There was a main effect of both the intervention (b = -0.24, P < .05) and genotype at rs16969968 (b = 0.14, P < .05) on high school smoking. Using dummy coding to allow for nonlinear effects, individuals with the A/A genotype smoked more often than those with G/G (b = 0.33, P < .05). A genotype × intervention effect was found with reduced smoking among those with A/A and G/A genotypes to levels similar to those with the G/G genotype (G/G vs. A/A: b = -0.67, P < .05; A/G vs. A/A: b = -0.61, P < .05; G/G vs. A/G ns). Results were nonsignificant for the other four markers. CONCLUSIONS: Preventive interventions can reduce the genetic risk for smoking from rs16969968.
RCT Entities:
INTRODUCTION: Prevention intervention programs reduce substance use, including smoking, but not all individuals respond. We tested whether response to a substance use prevention/intervention program varies based upon a set of five markers (rs16969968, rs1948, rs578776, rs588765, and rs684513) within the cluster of nicotinic acetylcholine receptor subunit genes (CHRNA5/A3/B4). METHODS:Participants (N = 424) were randomly assigned to either control condition, or a family-based intervention in grade 6 and a school-based drug preventive intervention in grade 7. Smoking in the past month was assessed in grades 9-12 using a four-point scale (0 = never smoked, 1 = smoked but not in last month, 2 = one or a few times, 3 = about once a week or more). RESULTS: There was a main effect of both the intervention (b = -0.24, P < .05) and genotype at rs16969968 (b = 0.14, P < .05) on high school smoking. Using dummy coding to allow for nonlinear effects, individuals with the A/A genotype smoked more often than those with G/G (b = 0.33, P < .05). A genotype × intervention effect was found with reduced smoking among those with A/A and G/A genotypes to levels similar to those with the G/G genotype (G/G vs. A/A: b = -0.67, P < .05; A/G vs. A/A: b = -0.61, P < .05; G/G vs. A/G ns). Results were nonsignificant for the other four markers. CONCLUSIONS: Preventive interventions can reduce the genetic risk for smoking from rs16969968.
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