LSU Researchers Receive $409,592 NIH Grant to Uncover Brain Mechanisms Driving Opioid Relapse

Researchers at the Louisiana State University School of Veterinary Medicine have been awarded a $409,592 grant from the National Institutes of Health's National Institute on Drug Abuse (NIDA) to investigate how opioid use produces lasting brain changes that heighten the risk of relapse. The two-year project, spanning 2026 to 2028, is led by Ethan Anderson, Ph.D., assistant professor in the Department of Comparative Biomedical Sciences, alongside co-investigators Olalekan Michael Ogundele, Ph.D., and Charles Lee, Ph.D.

The award builds on Dr. Anderson's recent recognition with the LSU Alumni Association Rising Faculty Research Award, which honors early-career faculty whose research demonstrates exceptional promise and impact.

The Relapse Challenge

Substance use disorders affect approximately one in 10 people in the United States, and opioid overdose deaths have risen dramatically over the past two decades. While treatments for opioid addiction are available, many individuals continue to struggle with relapse, largely because opioid use causes enduring changes in brain function.

"Our goal is to better understand how opioids alter brain function and contribute to drug-seeking behavior," Dr. Anderson said. "By identifying the specific brain cells and molecular mechanisms involved, we hope to uncover new targets for future therapies that could help reduce relapse."

Focusing on the Nucleus Accumbens

The research centers on the nucleus accumbens, a brain region that plays a central role in reward, motivation, and craving. Although prior studies have demonstrated that opioid use can alter neuronal activity in this region, scientists have yet to reach a consensus on precisely how those changes occur. Anderson and his colleagues hypothesize that the answer may lie in the fact that different types of brain cells respond to opioids in distinct ways.

Using advanced neuroscience techniques, the team will examine how heroin查看药品详情 use affects several distinct populations of neurons within the nucleus accumbens. The project is among the first to systematically examine opioid-related changes across multiple major cell types in this region, including some that have received less attention in addiction research. Four key cell populations will be studied to better understand how opioids alter brain function and contribute to craving and relapse.

The Role of SCN1b (搜索)搜索该靶点

A central molecular focus of the study is SCN1b (搜索)搜索该靶点, a component of sodium channels that helps regulate communication between nerve cells. Earlier work from Dr. Anderson's laboratory found that heroin查看药品详情 use reduces SCN1b levels in the nucleus accumbens. That reduction appears to make neurons more excitable and may increase drug-seeking behavior. The new study will determine which specific brain cell types are affected and whether restoring normal function could help reduce opioid seeking.

"This work is ultimately about understanding why relapse occurs," Dr. Anderson said. "The better we understand the underlying brain mechanisms, the better equipped we will be to develop interventions that help people maintain recovery."

Translational Potential

The findings could provide critical new insights into the biological processes that drive opioid craving and relapse, helping researchers identify novel approaches for treating substance use disorders. The project reflects LSU's commitment to advancing biomedical research that addresses pressing public health challenges. By bringing together expertise from the Anderson, Ogundele, and Lee laboratories, the study strengthens the school's expanding neuroscience research portfolio and contributes to discoveries that could ultimately improve the lives of individuals and families affected by addiction.