Mapping tiny habenula brain cells linked to opioid exposure
Official title: Integrated single cell and spatial mapping of habenula circuitry to identify projection-specific molecular pathways associated with opioid exposure.
Funded at Lieber Institute, INC. · NIH-11179422 · Data updated 2026-11-12
Researchers will map how specific habenula brain cells change after long-term opioid exposure to better understand opioid use disorder.
Quick facts
| Grant type | R21 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | Lieber Institute, INC. NIH-funded |
| Lab location | 1 site (Baltimore, United States) |
| Project start | September 1, 2024 |
| Project end | August 31, 2026 |
| Funding year | 2025 |
| Award (this year) | $222,170 |
| NIH project number | 5R21DA060407-02 |
| Project ID | NIH-11179422 on NIH RePORTER |
Who could benefit from this research
✓Could help
The patient group most relevant to this work are people with opioid use disorder or a history of long-term opioid exposure whose condition the research aims to help.
✕Less likely to help
People seeking immediate clinical treatment or those without opioid exposure are unlikely to receive direct benefit from this preclinical and post-mortem research.
What this research studies
From a patient's point of view, this project looks at tiny groups of cells in a brain region called the habenula that help control reward and motivation. In rats that self-administer opioids, scientists will use single-cell and spatial gene-mapping methods to see which cell types change with chronic opioid use. They will tag neurons that send signals to the brain's reward center (the VTA) to learn which projection neurons are most affected. Finally, the team will compare the rodent findings with gene data from human post-mortem habenula tissue to find overlaps that matter for people with opioid use disorder.
Why it matters
Potential benefit: If successful, this work could point to specific cell types and molecular pathways in the habenula that might become targets for new treatments for opioid addiction.
How similar studies have gone: Single-cell and spatial mapping have revealed meaningful cell-level changes in other brain disorders, but applying these methods to habenula circuits in the context of opioid exposure is relatively new.
Where this research is happening
-
Lieber Institute, INC.
Baltimore, United States Active
Researchers
- Principal investigator: Maynard, Kristen Rose — Lieber Institute, INC.
- Study coordinator: Maynard, Kristen Rose
Related research
Other NIH-funded projects on the same topics.
-
Single-cell map of mood circuits in major depressive disorder
Researchers will map the tiny brain cells in mood-control areas to understand how genes and cell types relate to depression, with attention to ancestry and sex.
-
Maternal SARS-CoV-2 infection and its effects on placenta and child development
This grant studies how COVID-19 infection during pregnancy might change the placenta and influence a child’s brain development, especially in kids who may be at higher genetic risk for ADHD/ASD.
-
Understanding schizophrenia risk using patient-derived neurons and 3D brain models
This project tests how common genetic risk factors relate to brain cell behavior and clinical symptoms in people with schizophrenia.
-
Understanding PTSD and depression from donated postmortem brain tissue with molecular analyses
This project looks at molecular differences in brains donated by people who had PTSD, major depression, or no psychiatric disorder to find biological clues about why some people develop chronic PTSD.
-
Gene activity in the habenula of people with opioid addiction and depression
This work looks at which genes are active in a small brain region called the habenula to learn how it differs in people with opioid addiction, major depression, or both.
-
How pigment and tau build-up in the brain's locus coeruleus change nearby gene activity
Researchers will map how pigment (neuromelanin) and tau protein build-up in a tiny brain center linked to Alzheimer's alter local gene activity in brain tissue from people with and without Alzheimer's.
About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page.