NCT05396287

Brief Summary

Brain blood flow regulation will be measured in response to environmental changes using MRI.

Trial Health

75
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
80

participants targeted

Target at P50-P75 for all trials

Timeline
2mo left

Started Jul 2022

Longer than P75 for all trials

Geographic Reach
1 country

1 active site

Status
active not recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress96%
Jul 2022Jul 2026

First Submitted

Initial submission to the registry

May 25, 2022

Completed
6 days until next milestone

First Posted

Study publicly available on registry

May 31, 2022

Completed
2 months until next milestone

Study Start

First participant enrolled

July 19, 2022

Completed
4 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

July 1, 2026

Expected
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

July 1, 2026

Last Updated

July 18, 2025

Status Verified

July 1, 2025

Enrollment Period

4 years

First QC Date

May 25, 2022

Last Update Submit

July 17, 2025

Conditions

Keywords

MRIBrain blood flow

Outcome Measures

Primary Outcomes (2)

  • Cerebral Vascular Reactivity to Hypercapnia

    The change in brain blood flow using MRI will be measured in response to a hypercapnic breathing test. The participants cerebral vascular reactivity to hypercapnia will be compared between the controls (without VAH) and those with VAH.

    One study visit, up to 120 minutes in the MRI

  • Cerebral Blood Flow Response to Hypoxia

    The change in brain blood flow using MRI will be measured in response to a hypoxic breathing test. The participants cerebral blood flow response to hypoxia will be compared between the controls (without VAH) and those with VAH.

    One study visit, up to 120 minutes in the MRI

Study Arms (2)

Controls

Healthy controls

Device: MRI

Vertebral Artery Hypoplasia

Healthy individuals with vertebral artery hypoplasia

Device: MRI

Interventions

MRIDEVICE

Participants will undergo an MRI scan while participating in two breathing tests (hypercapnia and hypoxia) to measure brain blood flow.

ControlsVertebral Artery Hypoplasia

Eligibility Criteria

Age55 Years - 69 Years
Sexall
Age GroupsAdult (18-64), Older Adult (65+)
Sampling MethodNon-Probability Sample
Study Population

Subjects for this study, will include healthy adults enrolled in the Wisconsin Alzheimer's Disease Research Clinical Core. Both men and women are eligible to participate in this study.

You may qualify if:

  • BMI ≤38.5 kg/m2
  • Nonsmoker
  • Female subjects: postmenopausal
  • Currently enrolled in the Wisconsin Alzheimer's Disease Research Clinical Core

You may not qualify if:

  • Diagnosis of mild cognitive impairment or Alzheimer's disease
  • Uncontrolled hypertension
  • History or evidence of hepatic disease, hematological disease, or peripheral vascular disease
  • Severe kidney injury requiring hemodialysis
  • Cardiovascular disease including: severe congestive heart failure, coronary artery disease, ischemic heart disease (stents, coronary artery bypass grafts) and tachycardia
  • History of clinically significant ischemic or hemorrhagic stroke, or significant cerebrovascular disease
  • History of HIV/AIDS
  • Severe untreated obstructive sleep apnea
  • History of diabetes with HbA1c greater than 9.5%
  • Major neurologic disorders other than dementia (e.g., multiple sclerosis, amyotrophic lateral sclerosis, brain surgery, etc.)
  • Current or recent (\<1 year) major psychiatric condition (Axis I) or addictive disorders
  • Contraindications to MRI

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

University of Wisconsin-Madison

Madison, Wisconsin, 53706, United States

Location

Related Publications (32)

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    PMID: 25071567BACKGROUND
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    PMID: 22442028BACKGROUND
  • Barnes JN, Harvey RE, Miller KB, Jayachandran M, Malterer KR, Lahr BD, Bailey KR, Joyner MJ, Miller VM. Cerebrovascular Reactivity and Vascular Activation in Postmenopausal Women With Histories of Preeclampsia. Hypertension. 2018 Jan;71(1):110-117. doi: 10.1161/HYPERTENSIONAHA.117.10248. Epub 2017 Nov 20.

    PMID: 29158356BACKGROUND
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    PMID: 25884110BACKGROUND
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    PMID: 30748053BACKGROUND
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    PMID: 20670828BACKGROUND
  • Wong SM, Jansen JFA, Zhang CE, Hoff EI, Staals J, van Oostenbrugge RJ, Backes WH. Blood-brain barrier impairment and hypoperfusion are linked in cerebral small vessel disease. Neurology. 2019 Apr 9;92(15):e1669-e1677. doi: 10.1212/WNL.0000000000007263. Epub 2019 Mar 13.

    PMID: 30867275BACKGROUND
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    PMID: 29567504BACKGROUND
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    PMID: 31680935BACKGROUND
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    PMID: 24392362BACKGROUND
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    PMID: 26898552BACKGROUND
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    PMID: 34687064BACKGROUND
  • Mikhail Kellawan J, Harrell JW, Roldan-Alzate A, Wieben O, Schrage WG. Regional hypoxic cerebral vasodilation facilitated by diameter changes primarily in anterior versus posterior circulation. J Cereb Blood Flow Metab. 2017 Jun;37(6):2025-2034. doi: 10.1177/0271678X16659497. Epub 2016 Jan 1.

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Biospecimen

Retention: SAMPLES WITHOUT DNA

Serum blood samples will be retained for future analysis.

Study Officials

  • Jill N Barnes, PhD

    University of Wisconsin, Madison

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
observational
Observational Model
CASE CONTROL
Time Perspective
PROSPECTIVE
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

May 25, 2022

First Posted

May 31, 2022

Study Start

July 19, 2022

Primary Completion (Estimated)

July 1, 2026

Study Completion (Estimated)

July 1, 2026

Last Updated

July 18, 2025

Record last verified: 2025-07

Data Sharing

IPD Sharing
Will not share

Locations