Summary:
The American Heart Association and the American Headache Society have joined forces to fund high-risk, high-reward research investigating how migraines and headache disorders drive cardiovascular and cerebrovascular decline. The projects aim to discover how recurring migraine attacks prime immune cells, damage cerebral blood vessels, impair brain waste clearance, and escalate stroke risk.
Key Facts:
- Historic Research Partnership: For the first time, the American Headache Society and the American Heart Association are co-funding an Innovative Project Award ($200,000 over two years) alongside three additional AHA-backed grants targeting the intersection of headaches and vascular health.
- Perivascular Macrophages as Stroke Drivers: The flagship co-funded project investigates whether frequent migraines over-activate the brain’s perivascular macrophages—vessel-guarding immune cells—causing vascular weakness that elevates stroke susceptibility.
- Multifaceted Pathological Targets: Additional funded projects will examine cortical spreading depression’s impact on cerebral endothelium, develop contrast-free MRI techniques for idiopathic intracranial hypertension (IIH), and study the choroid plexus in obesity-related migraines.
Source: American Heart Association / American Headache Society
Migraine is far more than a severe headache; it is a complex neurological disorder with well-documented, yet poorly understood, ties to systemic cardiovascular and cerebrovascular disease. Individuals who suffer from chronic migraine, particularly migraine with aura, face an elevated risk of stroke and myocardial infarction.
To unravel the mechanisms underlying this link, the American Headache Society (AHS) and the American Heart Association (AHA) have launched an inaugural joint funding partnership. Together with three standalone awards funded by the AHA, the initiative provides $200,000 over two years for high-risk, high-reward projects across basic science, clinical trials, and population health.
Do Overactive Immune “Guards” Weaken Brain Vessels?
The flagship co-funded award was granted to Juliana Navia Pelaez, Ph.D., an assistant professor at St. Louis University School of Medicine. Her project, “Neurogenic Priming of Perivascular Macrophages by Migraine-Associated Peptides Increases Stroke Risk,” focuses on the brain’s resident immune sentinels.
During a migraine episode, cerebral blood vessels undergo cycles of constriction, dilation, and altered flow. Dr. Pelaez’s laboratory is investigating whether perivascular macrophages—specialized immune cells that envelope and defend cerebral blood vessels—become pathologically hyperactive from repeated attacks.
“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. “If the vessels get weaker, the brain might have a harder time protecting itself from a stroke.”
By tracking how migraine-related neuropeptides trigger these macrophages, the study aims to identify therapeutic targets to calm overactivated immune cells or intercept inflammatory signaling cascades before vascular damage occurs.
Three Additional Projects Advancing Cerebrovascular Discoveries
Alongside Dr. Pelaez’s project, the AHA has funded three additional grants examining critical vascular interfaces in headache disorders:
- Cortical Spreading Depolarization and Endothelial Remodeling:Led by Andrea M. Harriott, M.D., Ph.D., at Massachusetts General Hospital, this project investigates how the neural waves underlying migraine aura (cortical spreading depolarizations) affect cerebral blood vessel linings. The team is analyzing protein shifts, collateral vessel remodeling, and angiogenesis to establish whether long-term aura exposure directly damages the brain’s vascular architecture.
- Glymphatic Clearance in Idiopathic Intracranial Hypertension (IIH):Headed by Matthew T. Bender, M.D., at the University of Rochester, this project addresses IIH, a debilitating disorder marked by elevated intracranial pressure that predominantly affects overweight women of childbearing age. Using a novel, non-invasive, contrast-free quantitative MRI technique, the team will visualize the glymphatic-hemodynamic axis before and after venous sinus stenting to uncover how opening cerebral veins restores waste removal and blood flow.
- The Choroid Plexus in Obesity-Driven Migraine: Led by Neil Dani, Ph.D., at Vanderbilt University, this initiative examines the choroid plexus, the cellular gateway that produces cerebrospinal fluid (CSF), in the rising prevalence of obesity-linked migraines. The study explores whether systemic metabolic inflammation enters the central nervous system via CSF pathways and will test whether clinically approved drugs, such as acetazolamide, can curb neuroinflammation and pain signaling.
By moving beyond symptom suppression to target shared inflammatory, hemodynamic, and glymphatic pathways, these collaborative efforts aim to pioneer preventive interventions that safeguard both brain and cardiovascular health.
Editorial Notes:
- This article was edited by a Neuroscience News editor.
- Journal paper will be reviewed in full upon release.
- Additional context added by our staff.
About this Neurology Research:
- Media Contact: Cathy Lewis
- Source: AHA
- Image Credit: Image credited to Neuroscience News
