Intranasal Insulin and Its Effect on Postprandial Metabolism in Comparison to Subcutaneous Insulin
The purpose of this study is to determine if glucose peaks higher and earlier after a meal when a patient is given intranasal insulin instead of conventional insulin treatment.
|Study Design:||Endpoint Classification: Bio-availability Study
Intervention Model: Crossover Assignment
Masking: Open Label
Primary Purpose: Basic Science
|Official Title:||Intranasal Insulin and Its Effect on Postprandial Glucose Metabolism in Comparison to Subcutaneous Insulin|
- The primary endpoint is to determine whether intranasal administration of Nasulin™ will stimulate glucose disposal and suppress endogenous glucose production. [ Time Frame: Blood will be measured at -30, -20, -10, 0, 2, 6, 8, 10, 20, 30, 45, 60, 75, 90, 120, 150, 180, 210, 240, 270, 300, 330 and 360 minutes ] [ Designated as safety issue: Yes ]
|Study Start Date:||July 2009|
|Estimated Study Completion Date:||September 2010|
|Estimated Primary Completion Date:||August 2009 (Final data collection date for primary outcome measure)|
Intranasal insulin spray
100 IU(2 puffs in each nostril)
Active Comparator: aspart
Administered subcutaneously based on routine clinical therapy.
Diabetes mellitus is a common metabolic disorder characterized by hyperglycemia which when untreated is associated with microvascular disease. Most people with type 1 diabetes are treated with a combination of long-acting (basal) insulin and short-acting (prandial) insulin administered prior to meals. This necessitates multiple daily injections (>3) which is a significant barrier to long-term compliance and treatment. Intranasal administration of insulin has been developed in an effort to overcome the need for insulin injection prior to meals. The pharmacokinetic properties conferred to insulin by this route of administration suggest that postprandial glucose disposal may be stimulated leading to lower glucose concentrations in comparison to dosing via other routes. We propose to study postprandial glucose turnover in healthy volunteers with Type 1 diabetes to determine the effect of intranasal insulin on glucose disposal. We wish to do so in order to develop a greater understanding of how the different bioavailability timing of intranasal insulin might alter postprandial glucose disposal and suppression of endogenous glucose production. In order to address these questions we will address specific aims:
- Peak postprandial glucose disposal is higher and occurs earlier, in the presence of intranasal insulin administration than it is in more conventional forms of insulin dosing.
- Peak suppression of endogenous glucose production is greater and occurs earlier, in the presence of intranasal insulin administration than it is in more conventional forms of insulin dosing.