Saturday, September 6, 2025
Science
No Result
View All Result
  • Login
  • HOME
  • SCIENCE NEWS
  • CONTACT US
  • HOME
  • SCIENCE NEWS
  • CONTACT US
No Result
View All Result
Scienmag
No Result
View All Result
Home Science News Medicine

Drugs of abuse alter neuronal signaling to reprioritize use over innate needs

April 18, 2024
in Medicine
Reading Time: 3 mins read
0
Drugs of abuse alter neuronal signaling to reprioritize use over innate needs
66
SHARES
597
VIEWS
Share on FacebookShare on Twitter
ADVERTISEMENT

Drugs of abuse, like cocaine and opioids, alter neuronal signaling in the nucleus accumbens (NAc), hijacking a key brain reward system involved with the fulfillment of innate needs for survival, according to a new study in mice. The findings provide mechanistic insights into the intensification of drug-seeking behaviors in substance use disorders. Persistent drug use is accompanied by a profound reprioritization of motivations, skewing decision-making behaviors toward a myopic focus on drug use over other innate needs, like eating or drinking water, often with little recognition of the adverse consequences. It’s thought that these impacts are driven, in part, by alterations in the brain’s reward systems, which normally function to identify and respond to the things essential for survival. However, the underlying physiological and molecular mechanisms linking the innate brain functions that become corrupted by drug use remain unclear. To address these unknowns, Bowen Tan and colleagues used whole-brain neuronal activity mapping, in vivo two-photon longitudinal calcium imaging, and single-cell sequencing to compare the response of key reward neural circuits activated by hunger and thirst to their response to morphine and cocaine in the mouse brain. Tan et al. discovered that the NAc plays a crucial role in motivated behavior and that, relative to other brain regions, activity in this region was increased in response to cocaine and morphine administration. Repeated exposure to these substances was found to drive functional and molecular changes that promote behavioral patterns underlying addiction and withdrawal. Tan et al. also identified Rheb – a gene that activates the mTOR pathway – as a molecular bridge that mediates cell-type-specific signaling in NAc and contributes to the ability of drugs to “hijack” natural reward processing. In vivo CRISPER perturbation of NAc-specific Rheb prevented the suppression of the natural reward responses induced by both cocaine and morphine. “Although these findings reveal how drugs can alter the neural circuitry that exists to satisfy survival needs, acute and chronic actions of drugs of abuse on decision-making extend beyond disrupting homeostatic needs,” write E. Zayra Millan and Gavan McNally. “Regardless, the findings by Tan et al. represent an important advance in understanding the brain mechanisms of addiction.”

Drugs of abuse, like cocaine and opioids, alter neuronal signaling in the nucleus accumbens (NAc), hijacking a key brain reward system involved with the fulfillment of innate needs for survival, according to a new study in mice. The findings provide mechanistic insights into the intensification of drug-seeking behaviors in substance use disorders. Persistent drug use is accompanied by a profound reprioritization of motivations, skewing decision-making behaviors toward a myopic focus on drug use over other innate needs, like eating or drinking water, often with little recognition of the adverse consequences. It’s thought that these impacts are driven, in part, by alterations in the brain’s reward systems, which normally function to identify and respond to the things essential for survival. However, the underlying physiological and molecular mechanisms linking the innate brain functions that become corrupted by drug use remain unclear. To address these unknowns, Bowen Tan and colleagues used whole-brain neuronal activity mapping, in vivo two-photon longitudinal calcium imaging, and single-cell sequencing to compare the response of key reward neural circuits activated by hunger and thirst to their response to morphine and cocaine in the mouse brain. Tan et al. discovered that the NAc plays a crucial role in motivated behavior and that, relative to other brain regions, activity in this region was increased in response to cocaine and morphine administration. Repeated exposure to these substances was found to drive functional and molecular changes that promote behavioral patterns underlying addiction and withdrawal. Tan et al. also identified Rheb – a gene that activates the mTOR pathway – as a molecular bridge that mediates cell-type-specific signaling in NAc and contributes to the ability of drugs to “hijack” natural reward processing. In vivo CRISPER perturbation of NAc-specific Rheb prevented the suppression of the natural reward responses induced by both cocaine and morphine. “Although these findings reveal how drugs can alter the neural circuitry that exists to satisfy survival needs, acute and chronic actions of drugs of abuse on decision-making extend beyond disrupting homeostatic needs,” write E. Zayra Millan and Gavan McNally. “Regardless, the findings by Tan et al. represent an important advance in understanding the brain mechanisms of addiction.”



Journal

Science

DOI

10.1126/science.adk6742

Article Title

Drugs of abuse hijack a mesolimbic pathway that processes homeostatic need

Article Publication Date

19-Apr-2024

Share26Tweet17
Previous Post

FAU and Mainstreet Research Florida poll shows Trump holds solid lead over Biden

Next Post

Novel material supercharges innovation in electrostatic energy storage

Related Posts

blank
Medicine

Top Research Highlights from UK Obesity Congress 2025

September 6, 2025
blank
Medicine

Overcoming Challenges in Pressure Injury Management Guidelines

September 6, 2025
blank
Medicine

PRMT5 Boosts Heart Failure in Pressure Overload

September 6, 2025
blank
Medicine

Dual-Target Fusion Protein Enhances Antiangiogenic Tumor Effects

September 6, 2025
blank
Medicine

Arabinoxylan Boosts Brain Signaling in Stroke Depression

September 6, 2025
blank
Medicine

Sexual Dimorphism in UGT Deficiency: New Insights Revealed

September 6, 2025
Next Post
Novel material supercharges innovation in electrostatic energy storage

Novel material supercharges innovation in electrostatic energy storage

  • Mothers who receive childcare support from maternal grandparents show more parental warmth, finds NTU Singapore study

    Mothers who receive childcare support from maternal grandparents show more parental warmth, finds NTU Singapore study

    27544 shares
    Share 11014 Tweet 6884
  • University of Seville Breaks 120-Year-Old Mystery, Revises a Key Einstein Concept

    959 shares
    Share 384 Tweet 240
  • Bee body mass, pathogens and local climate influence heat tolerance

    643 shares
    Share 257 Tweet 161
  • Researchers record first-ever images and data of a shark experiencing a boat strike

    510 shares
    Share 204 Tweet 128
  • Warm seawater speeding up melting of ‘Doomsday Glacier,’ scientists warn

    313 shares
    Share 125 Tweet 78
Science

Embark on a thrilling journey of discovery with Scienmag.com—your ultimate source for cutting-edge breakthroughs. Immerse yourself in a world where curiosity knows no limits and tomorrow’s possibilities become today’s reality!

RECENT NEWS

  • Top Research Highlights from UK Obesity Congress 2025
  • Geospatial AI Predicts Shimla Landslide Risks
  • Innovative Method Combines Experiments and Simulations for Impact Testing
  • Optimizing Biogas from Phragmites: Grinding, Season, Co-Digestion

Categories

  • Agriculture
  • Anthropology
  • Archaeology
  • Athmospheric
  • Biology
  • Blog
  • Bussines
  • Cancer
  • Chemistry
  • Climate
  • Earth Science
  • Marine
  • Mathematics
  • Medicine
  • Pediatry
  • Policy
  • Psychology & Psychiatry
  • Science Education
  • Social Science
  • Space
  • Technology and Engineering

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 5,183 other subscribers

© 2025 Scienmag - Science Magazine

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
No Result
View All Result
  • HOME
  • SCIENCE NEWS
  • CONTACT US

© 2025 Scienmag - Science Magazine

Discover more from Science

Subscribe now to keep reading and get access to the full archive.

Continue reading