Evaluation of the Effect of Hypoglycemia With PET and a Norepinephrine Transporter Ligand

Completed

Conditions studied: Hypoglycemia

In brief

The aim of this study is to use Positron Emission Tomography (PET) imaging to measure changes in norepinephrine transporter (NET) concentrations in the brain and periphery of healthy individuals during hypoglycemia. We hypothesize that during hypoglycemia, NE levels will increase within the brain, especially the hypothalamus, and this likely contributes to activation of glucose counterregulatory responses. We further hypothesize that during hypoglycemia, NET concentrations in key glucoregulatory regions will change in order to sustain or prolong sympathetic nervous system activation of counterregulatory responses.

Key facts

Study ID

NCT02056249

Run by

Yale University

People needed

9

Starts

2011-06-01

Expected to finish

2017-06-01

Last updated by the study team

2020-03-06

Who can join

Age: 18 and older, up to 55. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Males or females between 18 and 55 years of age
• Who are able to give voluntary written informed consent
• Able to tolerate PET and MR imaging
• Have clinical laboratory test results within normal reference range for the population or investigator site, or results with acceptable deviations that are judged to be not clinically significant by the investigator.
• Have no current uncontrolled medical condition such as neurological, cardiovascular, endocrine, renal, liver, or thyroid pathology
• Have no history of a neurological or psychiatric disorder
• No history of previous allergic reactions to drugs
• Do not suffer from claustrophobia or any MRI contradictions

You may not qualify if…

• History of liver disease
• Pregnancy/breast feeding (as documented by pregnancy testing at screening and on days of the imaging studies).
• Anemia (Hct <37 in women and < 40 in men)
• Presence of acute or unstable medical or neurological illness. Subjects will be excluded from the study if they present with any history of serious medical or neurological illness or if they show signs of a major medical or neurological illness on examination or lab testing including history of seizures, head injury, brain tumor, heart, liver or kidney disease, eating disorder, diabetes.
• Drug abuse (except nicotine)(Nicotine dependence will be permitted in all groups but controlled for in the analysis).
• Use of antidepressants.
• Clotting disorders or recent anticoagulant therapy.
• MRI-incompatible implants and other contraindications for MRI, such as pace-maker, artificial joints, non-removable body piercings, tattoos larger than 1 cm in diameter, claustrophobia, etc
• Clinically significant pulmonary, renal, cardiac or hepatic impairment or cancer, have clinically significant infectious disease, including AIDS or HIV infection, or previous positive test for hepatitis B, hepatitis C, HIV-1, or HIV-2; subjects will be asked about this. No testing will be performed.
• Have received a diagnostic or therapeutic radiopharmaceutical within 7 days prior to participation in this study.
• Blood donation during the 8-week period preceding the PET scan.
• Participation in other research studies involving ionizing radiation within one year of the PET scans that would cause the subject to exceed the yearly dose limits for normal volunteers.
• Unable to fast overnight prior to the PET scan.

Where it is running

• PET Center, YCCI Hospital Research Unit (HRU) — New Haven, Connecticut, United States

Full record on ClinicalTrials.gov

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