Related Experiment Video
Updated: Jan 11, 2026
Investigating Drivers of Antireward in Addiction Behavior with Anatomically Specific Single-Cell Gene Expression Methods
Published on: August 4, 2022
Transcription factors implicated in substance use disorder, from immediate early genes to altered gene expression
Emily Orr1, Jiye Yi1, Dustin Baldridge1
1Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA.
Abstract:
Transcription factors (TFs) link external stimuli to altered gene expression in all cell types, tissues, and biological processes. Because addiction phenotypes, including substance use disorder (SUD) cause enormous human suffering, significant effort is ongoing to understand the molecular processes that underlie these conditions, including elucidating the genetic drivers of addiction. While immense progress has been made, the combination of complex, multilocus genetics, large numbers of inherited variants of small effect size, and heterogeneous cellular physiology has proved difficult to untangle. Despite these challenges, genome-wide association studies (GWAS) have provided evidence for the likely causative role for some genes and pathways, and neurobiological molecular studies have implicated some cellular and physiological processes. These mechanisms include how the substance itself is processed, the subsequent induced signals that activate neurobiological responses and influence behavioral changes, and corresponding epigenetic and structural alterations of brain circuitry. These mechanisms persist for some users, contributing to the addictive phenotype. Central to this response is the activation of several transcription factors and cofactors that are considered "immediate early genes" (IEGs), which communicate signals through neurotransmitter signaling pathways in the brain. In this review, we aggregate published evidence that links TFs to SUD and summarize the key TFs (such as CREB1, FOSB, E2F3A, and EGR1) involved in shared cellular processes emphasizing the role of IEGs. We also document shared connections across substances and model organisms, with an emphasis on known epigenetic interactions, GWAS links, and relevance to human biology.
Insights
Transcription factors (TFs) are key molecular drivers of substance use disorder (SUD). This review highlights immediate early genes (IEGs) and their role in addiction, linking genetic and epigenetic factors to brain circuitry alterations.
Area of Science:
- Neuroscience
- Genetics
- Molecular Biology
Background:
- Substance use disorder (SUD) is a complex condition with significant human suffering.
- Understanding the genetic and molecular underpinnings of addiction is crucial for developing effective treatments.
- Genome-wide association studies (GWAS) and neurobiological research have identified potential genetic drivers and cellular processes involved in SUD.
Purpose of the Study:
- To review and aggregate published evidence linking transcription factors (TFs) to substance use disorder (SUD).
- To summarize key TFs, particularly immediate early genes (IEGs), involved in cellular processes relevant to addiction.
- To highlight shared connections across different substances, model organisms, and human biology, emphasizing epigenetic interactions and GWAS findings.
Main Methods:
- Literature review and evidence aggregation.
- Focus on transcription factors (TFs) and immediate early genes (IEGs).
- Analysis of shared connections across substances, model organisms, and human biology, including epigenetic interactions and GWAS data.
Main Results:
- Transcription factors (TFs) play a central role in mediating the effects of external stimuli on gene expression, including those related to addiction.
- Immediate early genes (IEGs) are critical in signaling pathways that link substance exposure to neurobiological and behavioral changes.
- Key TFs such as CREB1, FOSB, E2F3A, and EGR1 are implicated in shared cellular processes underlying addiction phenotypes.
- Evidence suggests commonalities in TF involvement across various substances and model systems, supported by epigenetic data and GWAS links.
Conclusions:
- Transcription factors (TFs), especially IEGs, are crucial molecular mediators in the development and persistence of substance use disorder (SUD).
- Understanding the specific roles of TFs and their interactions offers potential therapeutic targets for addiction.
- The convergence of genetic (GWAS), epigenetic, and neurobiological data underscores the complex, yet interconnected, molecular basis of addiction.
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