Summary:
The American Heart Association and the American Headache Society have launched a collaborative research initiative to fund bold, high-risk studies exploring how migraine and other headache disorders contribute to cardiovascular and cerebrovascular decline. Funded projects will investigate whether repeated migraine attacks alter immune activity around cerebral blood vessels, impair brain waste clearance systems, and ultimately increase the risk of stroke and other vascular events.
Key Facts:
- New Research Partnership: For the first time, the American Headache Society and the American Heart Association are co-funding an Innovative Project Award, providing $200,000 over two years, alongside three additional grants supported by the AHA that focus on how headache disorders intersect with vascular health.
- Perivascular Macrophages and Stroke Risk: The central co-funded study will test whether frequent migraine attacks chronically activate perivascular macrophages—the immune cells that patrol and protect cerebral vessels—leading to vascular weakening and a higher susceptibility to stroke.
- Multiple Vascular Pathways Targeted: Additional funded work will examine how cortical spreading depression affects the blood vessel lining, develop contrast-free MRI measures of glymphatic function in idiopathic intracranial hypertension (IIH), and study the role of the choroid plexus in obesity-related migraine.
Background: Migraine is more than episodic head pain. It is a complex neurological disorder with established links to systemic cardiovascular and cerebrovascular conditions. Patients with chronic migraine—especially those who experience aura—have a documented increased risk of stroke and myocardial infarction, but the biological mechanisms driving these associations remain incompletely understood.
To investigate these mechanisms, the American Headache Society (AHS) and the American Heart Association (AHA) created a joint funding program aimed at high-impact, translational research. The investment supports basic science, clinical imaging research, and population-level studies designed to reveal shared inflammatory, hemodynamic, and clearance-related pathways that could be targeted to prevent long-term vascular injury.
Do Overactive Immune “Guards” Weaken Brain Vessels?
The lead co-funded award supports Juliana Navia Pelaez, Ph.D., an assistant professor at Saint Louis University School of Medicine. Her project, titled “Neurogenic Priming of Perivascular Macrophages by Migraine-Associated Peptides Increases Stroke Risk,” centers on perivascular macrophages—resident immune cells that line cerebral blood vessels and help maintain vascular integrity.
During a migraine attack, cerebral vessels undergo rapid cycles of constriction, dilation, and fluctuating blood flow. Dr. Pelaez’s team is testing whether repeated exposure to migraine-associated neuropeptides chronically primes these perivascular macrophages into a sustained pro-inflammatory state. The hypothesis is that when these immune sentinels remain activated, they may inadvertently degrade vessel structure or impair repair mechanisms, increasing vulnerability to ischemic injury.
“If migraines happen over and over, these immune cells might stay ‘on’ for too long. When this happens, they might accidentally make the blood vessels weaker,” said Dr. Pelaez. The study will map how specific neuropeptides engage macrophage signaling, identify downstream inflammatory cascades that damage the endothelium or extracellular matrix, and evaluate potential interventions to moderate macrophage activation before lasting vascular damage occurs.
Three Additional Projects Advancing Cerebrovascular Discoveries
Along with the co-funded study, the AHA awarded three separate grants that probe distinct but complementary vascular interfaces implicated in headache disorders:
- Cortical Spreading Depolarization and Endothelial Remodeling: Led by Andrea M. Harriott, M.D., Ph.D., at Massachusetts General Hospital, this project examines how cortical spreading depolarizations—the neural waves that underlie migraine aura—impact the cerebral endothelium. Researchers will assess protein-level changes, collateral vessel remodeling, and angiogenic responses to determine whether repeated aura episodes produce structural vascular alterations.
- Glymphatic Clearance in Idiopathic Intracranial Hypertension (IIH): Headed by Matthew T. Bender, M.D., at the University of Rochester, this study targets IIH, a condition marked by elevated intracranial pressure and impaired cerebrospinal fluid dynamics that disproportionately affects overweight women of childbearing age. Using a new, non-invasive, contrast-free quantitative MRI approach, the team will characterize glymphatic and hemodynamic function before and after venous sinus stenting to evaluate how restoring venous outflow influences waste clearance and cerebral perfusion.
- The Choroid Plexus in Obesity-Driven Migraine: Led by Neil Dani, Ph.D., at Vanderbilt University, this initiative explores the choroid plexus—the structure that produces cerebrospinal fluid—as a potential entry point for systemic metabolic inflammation into the central nervous system. The study will investigate whether circulating inflammatory mediators in obesity alter choroid plexus function and CSF composition, and will test whether existing drugs, such as acetazolamide, can reduce neuroinflammation and pain signaling.
Together, these projects move research beyond short-term symptom control toward understanding and interrupting the biological processes that link migraine with vascular disease. By focusing on immune priming, endothelial remodeling, glymphatic clearance, and CSF-mediated signaling, the collaborative portfolio aims to identify actionable targets for prevention and to preserve both brain and cardiovascular health.
Editorial Notes:
- This article was edited by a Neuroscience News editor.
- Journal papers referenced will be reviewed in full upon publication.
- Additional context was provided by our staff to clarify study goals and implications.
About this Neurology Research:
- Media Contact: Cathy Lewis
- Source: AHA
- Image Credit: Image credited to Neuroscience News