Study of Nasal Insulin to Fight Forgetfulness - Device Study

Wake Forest University Health Sciences20 enrolled

Overview

The SNIFF Device study will involve using a device to administer insulin through each participant's nose or intra-nasally. Insulin is a hormone that is produced in the body. It works by lowering levels of glucose (sugar) in the blood. This study is measuring how much insulin the device delivers. In addition, this study will look at the effects of insulin or placebo administered intra-nasally using a nebulizer-like device on memory, blood, and cerebral spinal fluid.

The aim of this study is to determine the ability of an intranasal delivery device to increase levels of insulin in cerebrospinal fluid (CSF). A growing body of evidence suggests that insulin plays a role in normal memory processes and that insulin abnormalities may contribute to cognitive and brain changes associated with Alzheimer's disease (AD). Interestingly, insulin administered to the nasal cavity is transported within a few minutes into the brain, but does not affect blood sugar or insulin levels. The study will consist of a single site, randomized, double-blind trial comparing the acute effects of INI (20 International Units) or placebo delivered with nebulizer-like device on CSF insulin levels, AD biomarkers and memory. At study entry, participants will be randomized to receive either an acute dose of insulin or placebo first, and the other substance on a second visit. Participants who are cognitively normal or who have aMCI (n=30) will be enrolled. The primary outcome measure will be to test the hypothesis that CSF insulin levels will increase 30 minutes after receiving a 20 International Units dose of insulin delivered with a nebulizer-like device, compared to levels achieved 30 minutes after placebo.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

QUADRUPLE

Enrollment

Conditions

Mild Cognitive Impairment Cognitive Impairment

Interventions

InsulinDRUG

20 IU Humulin® R U-100 (NDC: 0002-8215, Eli Lilly \& Company)

PlaceboOTHER

Matching placebo (sterile saline) to 20 IU Humulin® R U-100

intranasal nebulizer-like deviceDEVICE

Participants will be assigned to receive placebo or regular insulin (U100, 20 IU) administered through an intranasal nebulizer-like device.

Eligibility

Sex: ALLMin age: 55 YearsMax age: 85 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Fluent in English * Cognitively normal or diagnosis of aMCI * Stable medical condition for 3 months prior to screening visit * Stable medications for 4 weeks prior to the screening and study visits * Clinical laboratory values must be within normal limits or, if abnormal, must be judged to be clinically insignificant by the study physician Exclusion Criteria: * A diagnosis of dementia * History of a clinically significant stroke * Current evidence or history in past two years of epilepsy, head injury with loss of consciousness, any major psychiatric disorder including psychosis, major depression, bipolar disorder * Diabetes (type I or type II) insulin dependent and non-insulin dependent diabetes mellitus * Current or past use of insulin or any other anti-diabetic medication within 5 years of Screening visit. * History of cancer five years prior to screening (history of skin melanoma or stable prostate cancer are not exclusionary) * History of seizure within past five years * Pregnancy or possible pregnancy. * Use of anticoagulants warfarin (Coumadin) and dabigatran (Pradaxa) * Residence in a skilled nursing facility at screening * Use of an investigational agent within two months of screening visit * Regular use of alcohol, narcotics, anticonvulsants, antiparkinsonian medications, or any other exclusionary medications

Locations (1)

Wake Forest University Health Sciences

Winston-Salem, North Carolina, United States

Outcomes

Primary Outcomes

CSF Insulin Levels

Levels of insulin in cerebrospinal fluid after being delivered with the device. This will help to determine the ability of an intranasal delivery device to increase levels of insulin in cerebrospinal fluid (CSF)

Time frame: 30 minutes after intervention administration

Secondary Outcomes

The Auditory-Verbal Learning Test (AVLT)

memory measure in which participant hears a list of 12 words over 3 trials, and is asked to recall them immediately after hearing them, then again after a 45 minute delay. Total possible score is 36 for immediate recall and 12 for delayed recall. Higher scores are better.

Time frame: 5 minutes before lumbar puncture, and immediately following lumbar puncture

CSF Levels of AB42

Levels of the 42 amino acid isoform of the beta amyloid peptide

Time frame: 30 minutes after intervention administration

CSF Levels of Total Tau

Levels of the tau protein

Time frame: 30 minutes after intervention administration

CSF Levels Phospho-tau 181

Levels of the tau phosphorylated at isotope 181

Time frame: 30 minutes after intervention administration

Data from ClinicalTrials.gov

This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.