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Central Sodium Sensing: Implications for Blood Pressure Regulation

NCT05480722 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 29

Last updated 2025-12-08

Study results available
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Summary

The ability of the brain to sense changing sodium levels in the blood is critical in mediating the neurohumoral responses to hypernatremia, however, the mechanisms underlying sodium sensing in humans is poorly understood. The purpose of this study is to identify key sodium-sensing regions of the human brain in older adults and determine if the Na-K-2Cl co-transporter mediates the neurohumoral response to acute hypernatremia. Completion of this project will increase our understanding of blood pressure regulation, which has major public health implications.

Conditions

  • Salt Sensitivity of Blood Pressure

Interventions

OTHER

Hypertonic Saline with furosemide

Subjects will undergo MRI with a hypertonic saline infusion with NKCC2 antagonism (furosemide). The hypertonic saline will be a 3% NaCl solution infused intravenously at a rate of 0.15 ml/kg/min for 30 minutes; the furosemide will be infused intravenously as a 40 mg bolus in 4mL of isotonic saline (0.9% NaCl) immediately prior to the hypertonic saline infusion.

OTHER

Hypertonic Saline without furosemide

Subjects will undergo MRI with a hypertonic saline infusion. The hypertonic saline will be a 3% NaCl solution infused intravenously at a rate of 0.15 ml/kg/min for 30 minutes.

Sponsors & Collaborators

  • University of Delaware

    lead OTHER

Principal Investigators

  • William B Farquhar, PhD · University of Delaware

Study Design

Allocation
NON_RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
SINGLE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Max Age
45 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2022-06-01
Primary Completion
2025-01-31
Completion
2025-01-31

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05480722 on ClinicalTrials.gov