Migraine and Blood Pressure Link and Your Genetics

Written by Scott Peeples, BS Biomedical Sciences · ExomeDNA Founder Reviewed by ExomeDNA Editorial Process Last reviewed: 2026-05-29

For informational purposes only. Consult a healthcare provider for clinical guidance.

Clinicians and patients have long observed that migraine and blood pressure-related conditions sometimes cluster together. A subset of people who experience migraine also report elevated blood pressure or heightened pulse pressure — the difference between systolic and diastolic readings that reflects arterial stiffness. Is this clustering coincidental, or does it reflect a shared genetic architecture? A genome-wide association study of migraine and pulse pressure simultaneously identified genetic loci contributing to both traits. This ExomeDNA page covers the shared vascular genetics of migraine and pulse pressure, anchored in genes including ITGB5 (integrin beta-5), COL4A1 (collagen type IV), and PHACTR1 (phosphatase and actin regulator 1). Research base: Moderate. Hedging applies throughout, as the moderate confidence tier reflects loci that are plausible but not yet as extensively replicated as the primary migraine susceptibility loci.

What is the migraine and blood pressure link?

Pulse pressure — the arithmetic difference between systolic and diastolic blood pressure — is a clinically recognized marker of arterial stiffness. As arteries lose elasticity with age or disease, they absorb less of the pressure wave generated by each heartbeat, producing a wider pulse pressure. Elevated pulse pressure is an established cardiovascular risk factor, particularly for coronary artery disease and stroke in older adults.

The connection between migraine and vascular health is not new to clinical medicine. Migraine — especially migraine with aura — has been associated in epidemiological studies with modestly elevated risk of ischemic stroke and cardiovascular events. The mechanisms proposed include shared neurovascular biology, endothelial dysfunction, and alterations in vascular tone that affect both intracranial blood vessels (relevant to the migraine attack) and systemic vasculature (relevant to blood pressure and arterial stiffness).

This ExomeDNA trait addresses the genetic dimension of this overlap. A genome-wide association analysis (Author et al. 2020, PMID 32632093) sought to identify genetic loci that contribute to both migraine and pulse pressure simultaneously — a pleiotropic architecture where the same variants influence two seemingly distinct clinical phenotypes through shared biological mechanisms. The nine or more loci identified in this analysis represent areas of the genome where variation simultaneously shapes migraine susceptibility and arterial stiffness.

It is important to understand what this trait does and does not represent. A higher score here does not indicate a clinical cardiovascular condition, nor does it indicate elevated blood pressure. It reflects genetic background at loci where migraine and pulse pressure share common variant signals.

The genetics behind the migraine and blood pressure link

The highest-priority gene in this analysis is ITGB5 — integrin beta-5 — with a gene prioritization score of 0.918. Integrins are heterodimeric cell adhesion receptors that mediate attachment of cells to extracellular matrix proteins including vitronectin and fibronectin. ITGB5 pairs with integrin alpha-V to form the alpha-V/beta-5 heterodimer, which is expressed in vascular endothelium and plays roles in angiogenesis, endothelial permeability, and the mechanosensing by which endothelial cells detect and respond to hemodynamic forces. Variants at the ITGB5 locus likely influence how vascular endothelial cells interact with their extracellular matrix — a process relevant to both arterial wall stiffness and to the neurovascular responses underlying migraine.

PHACTR1 — phosphatase and actin regulator 1 — ranks second (L2G 0.846) and represents the clearest shared signal between this trait and the primary migraine susceptibility dataset. PHACTR1 has been associated in multiple independent GWAS with coronary artery disease, spontaneous coronary artery dissection, fibromuscular dysplasia, and migraine. Its role in vascular smooth muscle biology and actin cytoskeleton regulation in endothelial cells makes it a genuinely pleiotropic vascular gene. In this migraine-pulse pressure context, PHACTR1 variants may operate through their effects on vascular wall compliance and smooth muscle contractile regulation.

FHL5 — four-and-a-half LIM domain protein 5 — ranks third (L2G 0.761) and is a shared signal with the primary migraine susceptibility loci as well. FHL5 is coordinately expressed with the activator of CREM in the cAMP signaling pathway, conferring powerful transcriptional activation in neurons and other cell types. Its recurrence across both migraine datasets suggests a genuine neurobiological contribution to migraine susceptibility that is not specific to the vascular dimension of this trait.

COL4A1 — type IV collagen alpha-1 — ranks seventh (L2G 0.736) and is mechanistically the most compelling gene in this dataset for explaining the migraine-pulse pressure overlap. Type IV collagen is the primary structural protein of vascular basement membranes — the thin extracellular matrix layers that underlie endothelial cells in blood vessels throughout the body, including the cerebral vasculature. Rare mutations in COL4A1 cause CARASIL (cerebral autosomal recessive arteriopathy with subcortical infarcts and leukoencephalopathy) and are strongly associated with hemorrhagic stroke and cerebral small vessel disease — conditions that reflect the consequences of defective vascular basement membrane integrity in the brain. The presence of common variants near COL4A1 in a migraine-pulse pressure GWAS is mechanistically straightforward: COL4A1 variation that subtly alters vascular basement membrane composition or quantity could simultaneously affect arterial stiffness (via altered vessel wall structure) and cerebrovascular reactivity (relevant to migraine neurovascular biology).

HIC1 — hypermethylated in cancer 1 — ranks fourth (L2G 0.753), a transcription factor with vascular development roles. ADAMTSL4 — ADAMTS-like protein 4 — ranks fifth (L2G 0.749), encoding an extracellular matrix regulator involved in fibrillin-1 microfibril organization; variants may influence connective tissue properties in vascular walls. SLC24A3 — sodium/potassium/calcium exchanger 3 — ranks sixth (L2G 0.738) and regulates calcium homeostasis in vascular smooth muscle and neurons, directly relevant to vascular tone and cortical spreading depression thresholds.

Additional authorized genes include MPPED2 (metallophosphoesterase domain-containing protein 2), KCNE2 (a potassium channel regulatory subunit in cardiac and vascular smooth muscle), and DNAJA3 (a mitochondrial Hsp40 chaperone supporting protein folding and quality control).

COL4A1 and cerebral vascular integrity — Type IV collagen alpha-1 is the primary structural component of cerebrovascular basement membranes. Rare COL4A1 mutations cause hereditary cerebral small vessel disease; common variants at this locus appearing in a migraine-pulse pressure GWAS reflect how vascular basement membrane biology contributes to both arterial stiffness and neurovascular migraine mechanisms.^[1]

What the research says

Research base: Moderate. The genome-wide association study underlying this trait (Author et al. 2020, PMID 32632093) applied a pleiotropic analysis framework to simultaneously identify loci contributing to both migraine and pulse pressure. This approach — sometimes called multi-trait or cross-phenotype GWAS — increases statistical power to detect shared loci by leveraging the correlation structure between two related traits, but the resulting loci require replication in independent cohorts to confirm their contributions to each individual phenotype.

For methodological context on how ExomeDNA integrates gene prioritization and confidence tiering, see the methodology page.

The moderate confidence tier applied to this trait reflects the state of replication for these specific pleiotropic loci. While genes like PHACTR1 and COL4A1 have strong independent biological support and appear in multiple GWAS contexts, others — including ITGB5, HIC1, and ADAMTSL4 — derive their placement here primarily from this single pleiotropic analysis. Effect sizes for individual loci in pleiotropic GWAS frameworks can shift when analyzed in larger, more diverse cohorts, and some signals may not replicate cleanly to each individual phenotype independently.

The biological hypothesis — that migraine and arterial stiffness share vascular genetic architecture through genes controlling basement membrane integrity, endothelial adhesion, calcium homeostasis, and vascular smooth muscle regulation — is mechanistically well-grounded. What remains less certain is the precise magnitude of each locus's contribution to clinical migraine or to clinically relevant pulse pressure elevation in any specific individual.

Migraine and cardiovascular overlap — Epidemiological studies have associated migraine with aura with modestly elevated risk of ischemic stroke, particularly in younger women. The shared vascular genetics identified in cross-phenotype GWAS analyses of migraine and pulse pressure provide one potential biological mechanism for this epidemiological association.^[1]

How the migraine and blood pressure link affects you

For anyone who experiences migraine: this trait page provides a biological explanation for why migraine sometimes co-occurs with blood pressure-related vascular findings. The shared genetic loci — particularly COL4A1 and ITGB5 — point to vascular basement membrane biology and endothelial adhesion as a domain where migraine neurovascular mechanisms and systemic arterial physiology intersect. This is not a clinical cardiovascular assessment, and this score does not establish or alter any clinical cardiovascular risk calculation.

For anyone who experiences both migraine and elevated blood pressure or pulse pressure: the genetic overlap documented here suggests a shared biological substrate. This is clinically relevant context to share with a neurologist or cardiologist, particularly if migraine attacks correlate with blood pressure fluctuations. Some individuals with both migraine and hypertension benefit from antihypertensive agents that also have migraine prevention evidence — a convergence that may reflect this shared vascular architecture.

For people without migraine: this trait captures genetic background at loci where migraine and pulse pressure signals overlap. A higher score does not indicate that migraine or elevated pulse pressure will occur — it reflects genetic variation at these shared loci. Many people with high scores at these loci experience neither condition.

For people with fibromuscular dysplasia or spontaneous coronary artery dissection: PHACTR1 and COL4A1 are shared genetic signals between those conditions and migraine, consistent with observed co-occurrence in clinical populations. A vascular specialist or neurologist familiar with connective tissue vascular conditions is best positioned to advise on clinical implications.

This information should not be used to self-manage blood pressure or migraine treatment. Clinical guidance on either condition requires full clinical assessment by a qualified healthcare provider.

Working with your result

The shared vascular biology highlighted by this trait points to several domains where lifestyle approaches may be relevant to both migraine and cardiovascular health:

Vascular health and arterial stiffness: Arterial stiffness increases with age and is accelerated by chronic hypertension, sedentary behavior, and high-sodium diets. Regular aerobic exercise is the most robustly supported intervention for maintaining arterial elasticity — it improves endothelial function, reduces blood pressure, and supports vascular smooth muscle health. For someone with both migraine and elevated pulse pressure concerns, aerobic fitness represents a domain where the biological targets of this trait (endothelial function, vascular wall compliance) are most directly addressable.

Blood pressure monitoring: For anyone with migraine and a personal or family history of cardiovascular conditions, regular blood pressure monitoring is a low-cost practice with clinical value. Migraine attacks can be accompanied by transient blood pressure elevations; tracking blood pressure across the migraine cycle (before, during, and after attacks) may provide informative patterns to share with a healthcare provider.

Dietary sodium and hydration: Dietary sodium directly affects blood pressure and vascular load. Adequate hydration supports blood volume and reduces vasomotor fluctuations that can trigger migraine. A Mediterranean-pattern diet — high in vegetables, fish, olive oil, and whole grains — is associated with better arterial function and has been studied in migraine prevention.

Avoiding combined risk amplifiers: Oral contraceptive use in women with migraine with aura is associated with elevated stroke risk in observational data — a risk pattern that is plausibly related to the shared vascular biology of migraine and pulse pressure. This is a conversation for a primary care provider or gynecologist, not a self-managed decision.

COL4A1 and connective tissue considerations: Type IV collagen variants affect vascular basement membrane integrity. While no specific lifestyle intervention targets COL4A1 directly, the broader vascular considerations above — aerobic fitness, blood pressure monitoring, sodium reduction — align with supporting the same vascular biology this gene represents.

No supplement, medication, or clinical treatment is endorsed based on this genetic information alone. Evidence-based management of both migraine and blood pressure requires clinical assessment.

This page is for educational purposes only. ExomeDNA does not provide clinical guidance. For health-related questions, please consult a qualified healthcare provider.

Related traits and genes

The vascular and migraine biology of this trait connects to several other ExomeDNA trait pages:

• Migraine Susceptibility (TRAIT_108871) — the primary clinical PheCode 340 migraine cohort; shares PHACTR1 and FHL5 with this page; covers TRPM8 as the primary trigeminal pain receptor signal
• Headache and Migraine Susceptibility — broader 63-locus migraine GWAS with JAG1, TSPAN2, and RNF213 as top signals
• Arterial Stiffness — covers pulse pressure and arterial elasticity genetics directly
• Coronary Artery Disease Risk — PHACTR1 is a shared signal between coronary artery disease and migraine genetics; the vascular pleiotropic architecture is genuinely overlapping
• Cerebrovascular Disease — COL4A1 variants relevant to cerebral small vessel disease and vascular brain health appear here and in cerebrovascular risk genetics

Key genes featured on this page: ITGB5 (integrin beta-5, endothelial adhesion — primary signal), PHACTR1 (vascular smooth muscle, pleiotropic), FHL5 (cAMP transcriptional activator), HIC1 (vascular development transcription factor), ADAMTSL4 (extracellular matrix regulation), SLC24A3 (calcium homeostasis in smooth muscle and neurons), COL4A1 (vascular basement membrane collagen), MPPED2 (metallophosphoesterase), KCNE2 (potassium channel regulator), DNAJA3 (mitochondrial chaperone).

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References:

1. Author et al. Genome-wide analysis of migraine and pulse pressure identifies shared vascular genetic loci. 2020. PMID: 32632093

Frequently asked questions

Q: What does it mean to have shared genetics between migraine and pulse pressure? A: It means that some of the same genetic variants influence both migraine susceptibility and pulse pressure (a measure of arterial stiffness) — likely because the underlying biological pathways, particularly vascular wall integrity and endothelial function, are relevant to both conditions. This does not mean that everyone with a high score on this trait will experience migraine or elevated pulse pressure; it means the genetic background at these loci is shared between the two phenotypes.

Q: Should I be concerned about cardiovascular health if I score high on this trait? A: This trait score is not a clinical cardiovascular risk assessment and should not be interpreted as one. It reflects genetic background at loci where migraine and pulse pressure share common variant signals. Concerns about cardiovascular health — blood pressure, arterial stiffness, or related conditions — should be discussed with a primary care provider who can perform a full clinical evaluation.

Q: Why is COL4A1 — a collagen gene — relevant to migraine? A: COL4A1 encodes type IV collagen alpha-1, the primary structural protein of vascular basement membranes — the thin matrix layers lining blood vessels throughout the body, including cerebral vessels. Rare COL4A1 mutations cause hereditary cerebral small vessel disease; common variants at this locus appear in the migraine-pulse pressure GWAS because subtle variation in vascular basement membrane integrity can simultaneously affect arterial stiffness and the neurovascular reactivity that underlies migraine biology.

Q: I have both migraine and high blood pressure — is this relevant to me? A: The shared vascular genetic architecture identified in this analysis is contextually relevant for anyone experiencing both conditions. Some antihypertensive medications — particularly beta-blockers and calcium channel blockers — also have established migraine prevention evidence, which may reflect this shared vascular biology. A neurologist or cardiologist familiar with both conditions is the right resource for managing the clinical implications. This genetic information is useful context for that conversation, not a self-management guide.

Q: How is this trait different from the Migraine Susceptibility trait on ExomeDNA? A: The Migraine Susceptibility trait (TRAIT_108871) captures the primary clinical migraine cohort (PheCode 340) with a robust confidence tier and TRPM8 as the top signal — it is focused on migraine-specific genetics. This Migraine and Blood Pressure Link trait captures a cross-phenotype GWAS that simultaneously identified loci shared between migraine and pulse pressure, with ITGB5 and COL4A1 as distinctive signals reflecting vascular basement membrane and endothelial biology. The two pages are complementary: one covers migraine susceptibility directly, the other covers the neurovascular overlap between migraine and arterial physiology.