Yale University
Kelly Cosgrove
Aim 1: To measure levels of microglia using the radiotracer [11C]PBR28 and PET brain imaging in obese (n=50) vs. lean individuals (n=50). The investigators will recruit 100 subjects who will participate in a single [11C]PBR28 scan to measure levels of TSPO, a marker of microglia. Aim 2: To determine differences in brain functional connectivity at rest and in response to a decision- making task in obese (n=50) vs. lean individuals (n=50) using fMRI imaging. The same subjects from Aim 1 will participate in a resting state functional magnetic resonance imaging (fMRI) followed by a decision making task during fMRI acquisition. Aim 3: To assess whether acute elevation of lipid levels through intralipid infusion in lean, healthy individuals (n=20) will induce microglial activation. 20 lean individuals will be recruited to participate in a paradigm that includes a baseline [11C]PBR28 scan, an infusion of intralipid, and a second [11C]PBR28 scan approximately 4 hours post intralipid infusion. The investigators will attempt to utilize subjects from aim 1 in order to use their baseline scans for this paradigm. Aim 4: To determine whether there are differences in levels of microglia between individuals with and without type 1 diabetes (n=20). 20 patients with diabetes (type 1 diabetes or type 2 diabetes)will be recruited to participate in a single [11C]PBR28 scan to compare to Aim 1 participants.
Obesity
Intralipid Infusion
Phase 1
Study Type : | Interventional |
Estimated Enrollment : | 0 participants |
Masking : | None (Open Label) |
Primary Purpose : | Basic Science |
Official Title : | Neuroimmune Mechanisms in Obesity |
Actual Study Start Date : | January 1, 2024 |
Estimated Primary Completion Date : | January 1, 2033 |
Estimated Study Completion Date : | January 1, 2033 |
Arm | Intervention/treatment |
---|---|
No Intervention: Baseline [11C]PBR28 PET Scan Subjects will complete a 120-minute baseline [11C]PBR28 PET scan. |
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Experimental: Post-Intralipid Infusion [11C]PBR28 PET Scan Subjects will complete a second 120-minute [11C]PBR28 PET scan 4 hours after Intralipid Infusion |
Ages Eligible for Study: | 18 Years to 55 Years |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | Accepts Healthy Volunteers |
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Not yet recruiting
Yale University
New Haven, Connecticut, United States, 06519