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Meyer GP, da Silva BS, Bandeira CE, Tavares MEA, Cupertino RB, Oliveira EP, Müller D, Kappel DB, Teche SP, Vitola ES, Rohde LA, Rovaris DL, Grevet EH, Bau CHD. Dissecting the cross-trait effects of the FOXP2 GWAS hit on clinical and brain phenotypes in adults with ADHD. Eur Arch Psychiatry Clin Neurosci 2023; 273:15-24. [PMID: 35279744 DOI: 10.1007/s00406-022-01388-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 02/01/2022] [Indexed: 11/03/2022]
Abstract
The Forkhead box P2 (FOXP2) encodes for a transcription factor with a broad role in embryonic development. It is especially represented among GWAS hits for neurodevelopmental disorders and related traits, including attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder, neuroticism, and risk-taking behaviors. While several functional studies are underway to understand the consequences of FOXP2 variation, this study aims to expand previous findings to clinically and genetically related phenotypes and neuroanatomical features among subjects with ADHD. The sample included 407 adults with ADHD and 463 controls. Genotyping was performed on the Infinium PsychArray-24 BeadChip, and the FOXP2 gene region was extracted. A gene-wide approach was adopted to evaluate the combined effects of FOXP2 variants (n = 311) on ADHD status, severity, comorbidities, and personality traits. Independent risk variants presenting potential functional effects were further tested for association with cortical surface areas in a subsample of cases (n = 87). The gene-wide analyses within the ADHD sample showed a significant association of the FOXP2 gene with harm avoidance (P = 0.001; PFDR = 0.015) and nominal associations with hyperactivity symptoms (P = 0.026; PFDR = 0.130) and antisocial personality disorder (P = 0.026; PFDR = 0.130). An insertion/deletion variant (rs79622555) located downstream of FOXP2 was associated with the three outcomes and nominally with the surface area of superior parietal and anterior cingulate cortices. Our results extend and refine previous GWAS findings pointing to a role of FOXP2 in several neurodevelopment-related phenotypes, mainly those involving underlying symptomatic domains of self-regulation and inhibitory control. Taken together, the available evidence may constitute promising insights into the puzzle of the FOXP2-related pathophysiology.
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Affiliation(s)
- Gabriela Pessin Meyer
- Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Bruna Santos da Silva
- Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,ADHD Outpatient Program, Clinical Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Developmental Psychiatry Program, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Department of Genetics, Institute of Biosciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Cibele Edom Bandeira
- Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,ADHD Outpatient Program, Clinical Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Developmental Psychiatry Program, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Department of Genetics, Institute of Biosciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Maria Eduarda Araujo Tavares
- Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,ADHD Outpatient Program, Clinical Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Developmental Psychiatry Program, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Department of Genetics, Institute of Biosciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Eduarda Pereira Oliveira
- Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Diana Müller
- ADHD Outpatient Program, Clinical Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Developmental Psychiatry Program, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Djenifer B Kappel
- Division of Psychological Medicine and Clinical Neurosciences, School of Medicine, MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Cardiff, Wales
| | - Stefania Pigatto Teche
- ADHD Outpatient Program, Clinical Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Department of Psychiatry, School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Eduardo Schneider Vitola
- ADHD Outpatient Program, Clinical Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Department of Psychiatry, School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Luis Augusto Rohde
- ADHD Outpatient Program, Clinical Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Developmental Psychiatry Program, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Diego Luiz Rovaris
- Departamento de Fisiologia e Biofisica, Universidade de Sao Paulo Instituto de Ciencias Biomedicas, São Paulo, Brazil
| | - Eugenio Horacio Grevet
- ADHD Outpatient Program, Clinical Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Developmental Psychiatry Program, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Department of Psychiatry, School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Claiton Henrique Dotto Bau
- Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil. .,ADHD Outpatient Program, Clinical Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil. .,Developmental Psychiatry Program, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil. .,Department of Genetics, Institute of Biosciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
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Beierle JA, Yao EJ, Goldstein SI, Lynch WB, Scotellaro JL, Shah AA, Sena KD, Wong AL, Linnertz CL, Averin O, Moody DE, Reilly CA, Peltz G, Emili A, Ferris MT, Bryant CD. Zhx2 Is a Candidate Gene Underlying Oxymorphone Metabolite Brain Concentration Associated with State-Dependent Oxycodone Reward. J Pharmacol Exp Ther 2022; 382:167-180. [PMID: 35688478 PMCID: PMC9341249 DOI: 10.1124/jpet.122.001217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/16/2022] [Indexed: 11/22/2022] Open
Abstract
Understanding the pharmacogenomics of opioid metabolism and behavior is vital to therapeutic success, as mutations can dramatically alter therapeutic efficacy and addiction liability. We found robust, sex-dependent BALB/c substrain differences in oxycodone behaviors and whole brain concentration of oxycodone metabolites. BALB/cJ females showed robust state-dependent oxycodone reward learning as measured via conditioned place preference when compared with the closely related BALB/cByJ substrain. Accordingly, BALB/cJ females also showed a robust increase in brain concentration of the inactive metabolite noroxycodone and the active metabolite oxymorphone compared with BALB/cByJ mice. Oxymorphone is a highly potent, full agonist at the mu opioid receptor that could enhance drug-induced interoception and state-dependent oxycodone reward learning. Quantitative trait locus (QTL) mapping in a BALB/c F2 reduced complexity cross revealed one major QTL on chromosome 15 underlying brain oxymorphone concentration that explained 32% of the female variance. BALB/cJ and BALB/cByJ differ by fewer than 10,000 variants, which can greatly facilitate candidate gene/variant identification. Hippocampal and striatal cis-expression QTL (eQTL) and exon-level eQTL analysis identified Zhx2, a candidate gene coding for a transcriptional repressor with a private BALB/cJ retroviral insertion that reduces Zhx2 expression and sex-dependent dysregulation of cytochrome P450 enzymes. Whole brain proteomics corroborated the Zhx2 eQTL and identified upregulated CYP2D11 that could increase brain oxymorphone in BALB/cJ females. To summarize, Zhx2 is a highly promising candidate gene underlying brain oxycodone metabolite levels. Future studies will validate Zhx2 and its site of action using reciprocal gene editing and tissue-specific viral manipulations in BALB/c substrains. SIGNIFICANCE STATEMENT: Our findings show that genetic variation can result in sex-specific alterations in whole brain concentration of a bioactive opioid metabolite after oxycodone administration, reinforcing the need for sex as a biological factor in pharmacogenomic studies. The cooccurrence of female-specific increased oxymorphone and state-dependent reward learning suggests that this minor yet potent and efficacious metabolite of oxycodone could increase opioid interoception and drug-cue associative learning of opioid reward, which has implications for cue-induced relapse of drug-seeking behavior and for precision pharmacogenetics.
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Affiliation(s)
- Jacob A Beierle
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Emily J Yao
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Stanley I Goldstein
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - William B Lynch
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Julia L Scotellaro
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Anyaa A Shah
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Katherine D Sena
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Alyssa L Wong
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Colton L Linnertz
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Olga Averin
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - David E Moody
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Christopher A Reilly
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Gary Peltz
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Andrew Emili
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Martin T Ferris
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
| | - Camron D Bryant
- Ph.D. Program in Biomolecular Pharmacology (J.A.B., S.I.G.), Laboratory of Addiction Genetics, Department of Pharmacology and Experimental Therapeutics and Psychiatry (J.A.B., E.J.Y., W.B.L., J.L.S., A.A.S., K.D.S., A.L.W., C.D.B.), Department of Biology and Biochemistry, Center for Network Systems Biology (S.I.G., A.E.), and Graduate Program in Neuroscience (W.B.L), Boston University School of Medicine, Boston, Massachusetts; Transformative Training Program in Addiction Science (TTPAS) (J.A.B., W.B.L.) and Undergraduate Research Opportunity Program (J.L.S., K.D.S.), Boston University, Boston, Massachusetts; Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (C.L.L., M.T.F.); Department of Pharmacology and Toxicity, Center for Human Toxicology, University of Utah, Salt Lake City, Utah (O.A., D.E.M., C.A.R.); and Department of Anesthesiology, Pain, and Preoperative Medicine Stanford University School of Medicine, Stanford, California (G.P.)
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