ArticleGenes, brain, and behavior2025
Genetic Loci Influencing Cue-Reactivity in Heterogeneous Stock Rats.
Article in Genes, brain, and behavior, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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8 citing papers in PubMed.
- Point mutations and complex variants impact gene expression and addiction-related behaviors in Heterogeneous Stock rats.bioRxiv : the preprint server for biology · 2026Article
- Independent Heritability of Aversive Learning Influences on Cocaine-Seeking and Punishment Resistance in Rats.eNeuro · 2026Article
- Ivermectin reduces withdrawal-induced alcohol intake in rats: Association with CeA GABAergic enhancement and P2rx4 genetic liability.Neuropharmacology · 2026Article
- High incidence of estrous cycle irregularities in heterogeneous stock (HS) rats is associated with footshock-resistant cocaine intake.Psychopharmacology · 2026Article
- Genetic architecture and mechanisms of host-microbiome interactions from a multi-cohort analysis of outbred laboratory rats.Nature communications · 2025Article
- Ivermectin Reduces Withdrawal-Induced Alcohol Intake via CeA GABAergic Enhancement.bioRxiv : the preprint server for biology · 2025Article
- A Preclinical Alcohol Biobank: Samples from Behaviorally Characterized HS Rats for AUD Research.eNeuro · 2025Article
- Genetic Loci Influencing Cue-Reactivity in Heterogeneous Stock Rats.Genes, brain, and behavior · 2025Article
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Abstract
Addiction vulnerability is associated with the tendency to attribute incentive salience to reward predictive cues. Both addiction and the attribution of incentive salience are influenced by environmental and genetic factors. To characterize the genetic contributions to incentive salience attribution, we performed a genome-wide association study (GWAS) in a cohort of 1596 heterogeneous stock (HS) rats. Rats underwent a Pavlovian conditioned approach task that characterized the responses to food-associated stimuli ("cues"). Responses ranged from cue-directed "sign-tracking" behavior to food-cup directed "goal-tracking" behavior (12 measures, SNP heritability: 0.051-0.215). Next, rats performed novel operant responses for unrewarded presentations of the cue using the conditioned reinforcement procedure. GWAS identified 14 quantitative trait loci (QTLs) for 11 of the 12 traits across both tasks. Interval sizes of these QTLs varied widely. Seven traits shared a QTL on chromosome 1 that contained a few genes (e.g., Tenm4, Mir708) that have been associated with substance use disorders and other psychiatric disorders in humans. Other candidate genes (e.g., Wnt11, Pak1) in this region had coding variants and expression-QTLs in mesocorticolimbic regions of the brain. We also conducted a Phenome-Wide Association Study (PheWAS) on addiction-related behaviors in HS rats and found that the QTL on chromosome 1 was also associated with nicotine self-administration in a separate cohort of HS rats. These results provide a starting point for the molecular genetic dissection of incentive motivational processes and provide further support for a relationship between the attribution of incentive salience and drug abuse-related traits.
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