Hypoglycemia and Autonomic Nervous System Function (HypoANS)

March 7, 2018 updated by: Gail Adler, Brigham and Women's Hospital
The goals of this proposal are to determine the effects of hypoglycemia on the autonomic nervous system.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

22

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Massachusetts
      • Boston, Massachusetts, United States, 02115
        • Brigham and Women's Hospital
      • Boston, Massachusetts, United States, 02115
        • Beth Israel Deaconess Medical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 50 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria

  • Healthy volunteers
  • Males and females age 18 to 50 years

Exclusion Criteria

  • Pregnancy
  • Lactation
  • Subjects who smoke or are on other forms of nicotine will be excluded
  • Clinically evident coronary artery, cerebrovascular, or peripheral vascular disease, or presence of systemic illness that might affect autonomic function. Such illnesses include diabetes mellitus, congestive heart failure, hypertension, renal, pulmonary, hepatic disease, anemia, malignancies, untreated thyroid disease, and alcoholism.
  • Current major depressive illness
  • Any individuals on oral, injected, inhaled or topical corticosteroids within the last year or oral contraceptives within the past 3 months will be excluded.
  • Use of medications other than thyroxine

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Sham Comparator: Euglycemic hyperinsulinemic clamp
participant undergoes a euglycemic hyperinsulinemic clamp
Other: Euglycemic hyperinsulinemic clamp
Active Comparator: Hypoglycemic hyperinsulinemic clamp
participant undergoes a hypoglycemic hyperinsulinemic clamp
Other: Hypoglycemic hyperinsulinemic clamp

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in Baroreflex Sensitivity
Time Frame: 16 hours after euglycemic and hypoglycemic clamps as compared to baseline
The change in baroreflex sensitivity (milliseconds/mm Hg) is calculated as baroreflex sensitivity (milliseconds/mm Hg) on day 3 [assessed 16 hours after the clamp] minus baroreflex sensitivity (milliseconds/mm Hg) on day 1 [baseline assessment on the day prior to the clamp]). Change in baroreflex sensitivity in euglycemic clamp arm is compared to change in baroreflex sensitivity in hypoglycemic arm.
16 hours after euglycemic and hypoglycemic clamps as compared to baseline

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Muscle Sympathetic Nerve Activity
Time Frame: 16 hours after euglycemic and hypoglycemic clamps
Muscle sympathetic nerve activity (MSNA), at rest and immediately after nitroprusside, was measured on Day 3 about 16 hours after the euglycemic and hypoglycemic clamps.
16 hours after euglycemic and hypoglycemic clamps
Catecholamine Response to Lower-body Negative Pressure
Time Frame: 16 hours after euglycemic and hypoglycemic clamps
Plasma norepinephrine response to lower body negative pressure (at the minus 40 mm Hg data point) on Day 3 about 16 to 20 hours after completion of the euglycemic or hypoglycemic clamp.
16 hours after euglycemic and hypoglycemic clamps

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Brigham and Women's Hospital

Collaborators

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Beth Israel Deaconess Medical Center
National Institutes of Health (NIH)
National Center for Research Resources (NCRR)

Investigators

  • Principal Investigator: Gail K Adler, MD, PhD, Brigham and Women's Hospital
  • Principal Investigator: Roy L Freeman, MD, Beth Israel Deaconess Medical Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

June 8, 2004

Primary Completion (Actual)

November 6, 2007

Study Completion (Actual)

November 6, 2007

Study Registration Dates

First Submitted

March 20, 2013

First Submitted That Met QC Criteria

March 20, 2013

First Posted (Estimate)

March 22, 2013

Study Record Updates

Last Update Posted (Actual)

April 2, 2018

Last Update Submitted That Met QC Criteria

March 7, 2018

Last Verified

March 1, 2018

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2004P001233
  • M01RR002635 (U.S. NIH Grant/Contract)
  • R01DK063296 (U.S. NIH Grant/Contract)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

IPD Plan Description

The data collected will comply with the NIH requirements for timely release and data sharing. Data will be shared in the form of publications and presentations in scientific forums. As the NIH has noted, the investigators reserve the right to keep the data restricted in order to perform the initial analyses for this grant proposal and will continue to use the data for further, but not prolonged, exclusive use. Of note, the sharing of this data will be limited by at least the following issues, some unique to this proposal and some not unique. Some of the data obtained in this study is defined to be sensitive in nature, which may restrict its ability to be shared. Data may only be shared with the approval of our IRB and is limited by HIPPA and any other regulations that may be promulgated during the course of this proposal.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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