A Stable Glucagon Analog Administered by a Bihormonal Closed Loop System

Background of the study:

Inreda Diabetic B.V. (Goor, The Netherlands) developed a bi-hormonal reactive closed loop system to automate glucose regulation (artificial pancreas; AP) in patients with diabetes mellitus type 1. In the current CE-marked AP, GlucaGen® (Novo Nordisk, Denmark) is used as glucagon. This glucagon formulation is not stable and therefore fibrillation and infusion set occlusion could occur, resulting in reduced glucagon action with risk for hypoglycemia. Dasiglucagon (Zealand Pharma, Denmark) is a glucagon analog stable in aqueous solution and does therefore not suffer from fibrillation.

Objective of the study:

The main objective is to determine the feasibility of dasiglucagon in the Inreda AP-system. Secondary objectives are to assess safety parameters, differences in pharmacodynamics between dasiglucagon and GlucaGen® and differences in AP related outcomes.

Study design:

This study is a single-center, double-blinded, randomized, cross over trial which will be performed out-patient.

Study population:

The study population will comprise 12 subjects with diabetes type 1 using the AP system. Inclusion criteria are subjects from 18 years and older and treated with the Inreda AP system for a minimum of 1 month.

Intervention:

The intervention contains use of dasiglucagon administered by the Inreda AP-system. The subject will be randomized to receive either dasiglucagon or GlucaGen® during the first three days. After a wash-out period of four days, the subject will be switched to the alternate treatment. During both study periods subjects have to keep a diary, perform exercise, keep a WiFi access point with them, and have some eating restrictions.

Primary study parameters/outcome of the study:

Main parameter to express feasibility is the time in range (3.9 - 10.0 mmol/l), which will be compared between the dasiglucagon and reference glucagon.

Secondary study parameters/outcome of the study:

* Safety will be expressed as side effects of dasiglucagon compared to side effects of GlucaGen. * The amount of extra food intakes to prevent/ combat hypoglycemia. * Pharmacodynamics will be expressed in proportion of time spent in hypo-/hyperglycemia, median/mean glucose value, glycemic variability and PD curves, which will all be compared between the dasiglucagon and reference glucagon. * AP related outcomes will be expressed in daily administered (maintenance) dosage of insulin/glucagon and the percentage of time that the closed loop algorithm is active.