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OpenTrials
Completed

NCT Number: NCT03556033

Effect of Dapagliflozin on IAH in T1DM

Approximately 25% of patients with type 1 diabetes have lost the capacity to timely detect hypoglycaemia, a condition referred to as impaired awareness of hypoglycaemia (IAH) that causes a six-fold higher risk of severe, potentially hazardous, hypoglycaemia. IAH is usually the end-result of a process of habituation to recurrent hypoglycaemia that is potentially reversible. Treatment with sodium glucose cotransporter (SGLT)-2 inhibitors (SGLT-2i) in addition to insulin therapy may decrease the incidence of hypoglycaemia in patients with type 1 diabetes. This study will test the hypothesis that treatment with the SGLT-2 inhibitor, dapagliflozin, added to basal-bolus insulin therapy will improve awareness of hypoglycaemia in patients with type 1 diabetes and IAH. In a randomized doubleblind placebo-controlled cross-over trial, patients will be treated for 8 weeks with dapagliflozin (or placebo), after which hypoglycemic symptoms and counterregulatory hormone responses will be examined during a hyperinsulinemic hypoglycemic glucose clamp study.

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Key information

Age range

18 year–75 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

Radboud university medical center

Nijmegen, 6500HB, Netherlands

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Type 1 diabetes, disease duration >1 year
  • Age >18 years, <75 years
  • BMI 19-40 kg/m^2
  • Insulin treatment according to basal-bolus insulin regimen (injections or insulin pump)
  • Impaired awareness of hypoglycemia as assessed by a score of 3 or more on the modified Dutch translation of the Clarke questionnaire
  • Glycated haemoglobin (HbA1c) ≥42 mmol/mol (6%) and ≤75 mmol/mol (9.0%)
  • Ability to provide informed consent

Exclusion criteria

  • Treatment with SGLT-2 inhibitors
  • Known intolerance to SGLT-2 inhibitors
  • Treatment with loop diuretics or other anti-hypertensive agents
  • Treatment with glucose-modifying (other than insulin) or immune-modifying agents (e.g. prednisolon)
  • Treatment with pioglitazone
  • Use of statins
  • A history of cardiovascular disease (e.g. myocardial infarction, stroke, heart failure) or hypotension
  • A history of galactose-intolerance, lactase deficiency, glucose-galactose malabsorption
  • History of diabetic ketoacidosis requiring medical intervention within 1 month before screening
  • Admission to the hospital for hyperglycemia or hypoglycemia within 1 month before screening
  • Frequent episodes of severe hypoglycemia within 1 month before screening
  • Laser coagulation for proliferative retinopathy (past 6 months)
  • Proliferative retinopathy
  • Diabetic nephropathy as reflected by an albumin-creatinin ratio ˃ 30 mmol/mg or an estimated glomerular filtration rate (by MDRD) ˂60ml/min/1.73m2
  • History of pancreatitis (acute or chronic) or pancreatic cancer
  • Use of premixed insulin or of long-acting insulin alone
  • Total daily insulin dose requirements <20 units unless on pump treatment
  • Pregnancy or unwillingness to undertake measures for birth control

Treatment and study plan

Dapagliflozin

Drug

8 weeks treatment with dapagliflozin on top of insulin treatment

Other names: Forxiga

Placebo oral capsule

Drug

8 weeks treatment with placebo capsules on top of insulin treatment

Primary outcomes

  1. Symptom score in response to insulin-induced hypoglycaemia

    Time frame: 45 minutes

    Symptom scores (autonomic, neuroglycopenic and general) measured during hyperinsulinemic hypoglycaemic glucose clamps. This questionnaire consists of 18 symptoms, which can be scored between 0 (none) to 6 (severe). Total scores range between 0 and 108, the higher the score, the more symptoms patients have during and after hypoglycemia.

Secondary outcomes

  1. Counterregulatory hormone responses to insulin-induced hypoglycaemia

    Time frame: 45 minutes

    (nor)adrenaline, glucagon, insulin, growth hormone and cortisol responses to hypoglycaemia measured during hyperinsulinemic hypoglycaemic glucose clamps

  2. Time until glycaemic recovery from hypoglycaemia

    Time frame: 45 minutes

    measured during hyperinsulinemic hypoglycaemic glucose clamps

  3. Maximal glucose excursion post-hypoglycaemia

    Time frame: 45 minutes

    Maximal glucose level (mmol/l) measured during the 90 minutes after ending the hypoglycaemic phase of the clamp (during restoration of euglycaemia)

  4. Time until glucose peak post-hypoglycaemia

    Time frame: 45 minutes

    measured during hyperinsulinemic hypoglycaemic glucose clamps

  5. Area under the glucose concentration curve post-hypoglycaemia

    Time frame: 45 minutes

    measured during hyperinsulinemic hypoglycaemic glucose clamps

  6. Number of severe hypoglycaemic events during follow-up

    Time frame: 16 weeks

    measured during follow-up

  7. Number of nocturnal hypoglycaemic events during follow-up

    Time frame: 16 weeks

    measured during follow-up

  8. Number of any hypoglycaemic events during follow-up

    Time frame: 16 weeks

    measured during follow-up

  9. Time spent under hypoglycaemic conditions measured by glucose sensor monitoring

    Time frame: 2 weeks

    measured during follow-up

  10. Glucose variability as measured by glucose sensor monitoring

    Time frame: 2 weeks

    measured during follow-up

Other outcomes

  1. Inflammatory/atherogenic phenotype of circulating monocytes from the participating patients

    Time frame: 45 minutes

    measured during hyperinsulinemic hypoglycaemic glucose clamps

Sponsors and collaborators

Lead sponsor

Radboud University Medical Center

Other

Registry information

Official study title

Effect of the SGLT-2 Inhibitor Dapagliflozin on Impaired Awareness of Hypoglycemia in Type 1 Diabetes

Important dates

Study start
2018
Primary completion
2019
Study completion
2019
First posted
Jun 14, 2018
Registry last updated
Mar 23, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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