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Addiction Research Laboratory at UCSD
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Blocking the Path to Addiction: How a Common Beta Blocker Could Curb Cocaine Use
Anxiety is a powerful driver of drug addiction, yet many standard anti-anxiety medications are not currently used to treat substance use disorders. Our latest research explores how targeting the brain's stress systems might offer a new way to prevent and treat cocaine addiction. By using a common medication called propranolol, we found that we could not only prevent the transition into heavy cocaine use but also reduce the deep seated motivation to seek the drug. The Question
Olivier George
2 min read


Drugs and Bugs: How Your Gut Microbiome Influences Addiction
We are currently facing a global public health crisis involving substance use disorders, which account for over 5% of the total global disease burden. While addiction has traditionally been viewed as a strictly "brain-based" disorder, our latest review, is revealing that the trillions of microbes living in your gut, collectively known as the microbiome, may play a leading role in how we respond to drugs. The Question: Can the Gut Control the Brain? We wanted to understand the
Olivier George
2 min read


The Nicotine Paradox: Why That First Puff Might Actually Make You Hungry
For decades, the common wisdom about nicotine has been simple: it’s an appetite suppressant. We’ve all seen the pattern where smokers tend to weigh less, while those who quit often face a struggle with weight gain. However, our latest study, a collaboration with researchers at Aix-Marseilles Université, suggests that this story is more complicated than we thought. It turns out that while nicotine causes weight loss in the long run, its immediate effect on the brain might actu
Olivier George
2 min read


Deep Brain Stimulation: A Double-Edged Sword for Cocaine Addiction
Cocaine addiction remains a critical public health crisis with no FDA-approved medication currently available. In our latest research, a collaboration between our team and the lab of Eric Kandel at Columbia University, we explored the potential of Deep Brain Stimulation (DBS) as a high-tech solution. While DBS has successfully treated movement disorders for decades, its role in addiction is more complex than we initially thought. The Question: Can We "Zap" Away Cocaine Use?
Olivier George
2 min read


The "Molecular Switch": How Our Brain Flips into Nicotine Dependence
We often think of addiction as a slow slide into habit, but what if the brain actually has a "molecular switch" that fundamentally changes how it responds to drugs? Our latest research, a collaboration with the University of Toronto and the lab of Derek van der Kooy, has identified a specific protein that can "flip" a drug-naive brain into a state that looks exactly like nicotine dependence—even without previous drug use. The Question: What Drives the Transition? While we kno
Olivier George
2 min read


Are We Compulsively Chasing Rainbows? Rethinking Addiction
The drug overdose crisis is a call to action for all of us, but to solve it, we need to make sure we are asking the right questions. In our latest perspective piece, a collaboration between our team and the labs of Serge Ahmed at the University of Bordeaux and Nicholas Gilpin at LSU Health New Orleans, we challenge a common assumption in the field: the idea that addiction is defined almost exclusively by "compulsive" behavior. The Question: Is "Compulsion" Everything? In both
Olivier George
2 min read


Unlocking the Brain’s "Control Panel": How Gene Networks Shape Addiction
We’ve all seen the devastating headlines about the drug overdose crisis. But behind the statistics lies a profound biological mystery: why does the brain stay "rewired" for addiction even long after someone stops using? Our latest study, a collaboration between our team and the lab of Francesca Telese at UC San Diego, is helping us peer under the hood of the brain's "control panel" to understand how substances like cocaine and oxycodone change the way our genes are managed. T
Olivier George
2 min read


Leptin: A Protective Factor Against Cocaine Addiction
Leptin: A Protective Factor Against Cocaine Addiction Cocaine doesn't just affect the brain's reward system—it also dramatically alters appetite, metabolism, and body weight. We investigated whether leptin, a hormone that regulates both feeding and reward, might play a role in vulnerability to cocaine addiction. Using samples from the Cocaine Biobank and genetically diverse rats, we discovered that leptin may be a protective factor against developing addiction-like behaviors.
Olivier George
4 min read


Blocking Stress Hormone Receptors to Curb Alcohol Dependence
Alcohol addiction hijacks the brain's stress systems, making withdrawal feel unbearable and driving continued drinking. We investigated whether a brain chemical called hypocretin/orexin—which plays key roles in both stress and reward—might be a promising target for treating alcohol dependence. This work was conducted in collaboration with the Schmeichel Lab. The Research Question We wanted to understand whether blocking different types of hypocretin receptors (called HCRT-R1
Olivier George
3 min read


Revealing the Hidden Brain: How Unbiased Imaging Can Transform Addiction Research
Flip through any neuroscience journal and you'll notice something striking: the same brain regions appear over and over again. The hippocampus, the amygdala, the prefrontal cortex—these are neuroscience's greatest hits. But what about the rest of the brain? We analyzed 197 brain regions and found that just 9 regions account for 75% of published research, while the remaining 188 regions represent only 25% of studies. That's a problem. The Research Question We wanted to explore
Olivier George
3 min read
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