NCT03392441

Insulin Deprivation on Brain Structure and Function in Humans With Type 1 Diabetes

Pilot Study to Evaluate the Effects of Insulin Deprivation on Brain Structure and Function in Humans With Type 1 Diabetes

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 28 (actual)
• Sponsor: Mayo Clinic · Academic / Other
• Sex: All
• Age: 14 Years – 45 Years
• Healthy volunteers: Accepted

Summary

What are the effects of transient insulin deprivation on brain structure, blood flow, mitochondrial function, and cognitive function in T1DM patients? What are the effects of transient insulin deprivation on circulating exosomes and metabolites in T1DM patients?

Detailed description

Diabetes is associated with impaired cognition, abnormal brain development in children, and dementia in older adults, however the underlying mechanisms remain unclear. Little is known about the brain-specific effects of acute insulin deficiency. Our recent studies in diabetic mice show an overall down regulation of brain mitochondrial ATP production and up regulation of several key mitochondrial proteins, indicating that insulin withdrawal has a profound effect on brain mitochondria as well as proteins implicated in neurodegeneration. Hyperglycemia is known to alter cognitive function, but it is unclear if insulin deprivation independently alters cognitive function and has not been assessed in humans. In order to investigate the effects of insulin deprivation on the human brain, we propose a study involving temporary insulin deprivation in adolescents and adults with type 1 diabetes (T1DM). We will perform brain MRI, phosphorus31 spectroscopy, cognitive testing, circulating blood exosome measurements, and proteomics from muscle biopsy; comparing these measures during insulin treatment and deprivation between diabetic patients and age-, sex-, BMI-matched controls. Specific aim 1: Determine whether transient insulin deprivation in T1DM adults and adolescents alters brain structure, functions and blood flow as assessed by structural/functional MRI. Specific aim 2: Determine whether transient insulin deprivation in T1DM adults and adolescents alters cognitive function. Specific aim 3: Determine whether transient insulin deprivation in T1DM adults and adolescents alters the circulating blood exosome contents and metabolome that can potentially impact brain functions. Specific aim 4: Determine whether transient insulin deprivation in T1DM adults alters the skeletal muscle proteome homeostasis especially those involved in fission and fusion

Conditions

• Diabetes Mellitus, Type 1
• Diabetes
• Diabetes Complications

Interventions

Type	Name	Description
OTHER	Insulin Deprivation in Type 1 Diabetic Patients	Type 1 Diabetic Patients requiring insulin will have insulin stopped for a short period of time (4-6 hours)

Timeline

• Start date: 2017-11-30
• Primary completion: 2018-08-01
• Completion: 2019-07-05
• First posted: 2018-01-08
• Last updated: 2022-02-03

Locations

1 site across 1 country: United States