A Single-dose Cross-over Study to Assess Direct and Indirect Effects of Dapagliflozin on Pancreatic Alpha and Beta Cells in Patients With Type 2 Diabetes

Uppsala University

Status and phase: Completed; Phase 4

Conditions: Diabetes Mellitus, Type 2

Treatments: Drug: Saxagliptin; Drug: Glucose; Drug: Dapagliflozin

Study type: Interventional

Funder types: Other; Industry

Identifiers

NCT02765204

2015-005549-30 (EudraCT Number)

ESR-15-11421

Details and patient eligibility

About

The purpose of this study is to evaluate if Dapagliflozin has direct effect on alpha cell glucagon release.

Enrollment: 15 patients

Sex: All

Ages: 18 to 75 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Males and females aged 18 - 75.

2. Female subjects must meet all of the following criteria:

   1. Not breastfeeding
   2. Negative pregnancy test result (human chorionic gonadotropin, beta subunit [hCG]) at Visit 0 (screening) (not applicable to hysterectomized females).
   3. If of childbearing potential (including perimenopausal women who have had a menstrual period within 1 year), must practice and be willing to continue to practice one of the following highly effective birth control methods during the entire duration of the study:

   i. Diaphragm or partner use of condom in combination with combined (estrogen and progestogen containing) hormonal contraception associated with inhibition of ovulation:

   • Oral
   • Intravaginal
   • Transdermal ii. Diaphragm or partner use of condom in combination with progestogen-only hormonal contraception associated with inhibition of ovulation:
   • Oral
   • Injectable
   • Implantable iii. Placement of an intrauterine device iv. Placement of an intrauterine hormone-releasing system v. Bilateral tubal occlusion vi. Vasectomised partner (provided that the partner is the sole sexual partner of the female subject and that the vasectomised partner has received medical assessment of the surgical success) vii. Sexual abstinence (defined as refraining from heterosexual intercourse) d) Must practice appropriate birth control as stated above for 10 weeks after the last dose of study medication

3. BMI 20 - 35.

4. Clinical T2D diagnosis at least 6 months prior to enrolment.

5. Metformin treatment, with stable dose for at least 1 month.

6. HbA1c 55 - 86 mmol/mol (7,2-10 % DCCT).

Exclusion criteria

1. History or sign of any clinically significant disease or disorder which, in the opinion of the investigator, may either put the subject at risk because of participation in the study, or influence the results or the subject's ability to participate in the study.
2. Clinical diagnosis of Type 1 diabetes mellitus and/or history of diabetic ketoacidosis or positive Glutamic Acid Decarboxylase Autoantibodies test (GAD antibodies test).
3. Patients treated with antipsychotics, systemic glucocorticoids, neuropsychiatric stimulants, antidepressants with sympathetic activity, beta blockers or other pharmaceuticals rendering patient unfit for study participation as judged by the investigator.
4. Patients treated with antidiabetic medications other than Metformin.
5. Patients with any other endocrine disease except substituted hypothyroidism.
6. Significant abnormal liver function defined as aspartate aminotransferase (AST) >3x upper limit of normal (ULN) and/or alanine aminotransferase (ALT) >3x ULN.
7. Patients with impaired liver or kidney function (eGFR < 60).
8. Known or suspected history of significant drug abuse.
9. History of alcohol abuse or excessive intake of alcohol as judged by investigator.
10. History of severe allergy/hypersensitivity or ongoing allergy/hypersensitivity, as judged by the investigator.
11. Plasma donation within one month of screening or any blood donation or significant blood loss (> 400 ml) during the 3 months prior to screening.
12. Any other condition with in the opinion of the investigator would render the patient unsuitable for inclusion in the study and /or for the patients safety.
13. Involvement in the planning and/or conduct of the study (applies to both AstraZeneca staff and/or staff at the study site).
14. Judgment by the investigator that the subject should not participate in the study if considers subject unlikely to comply with study procedures, restrictions and requirements.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: None (Open label)

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15 participants in 6 patient groups

DS-D-DG

Experimental group

Description:

The arm label indicates the order of the given treatments in this crossover designed study (DS=Dapagliflozin and Saxagliptin, D=Dapagliflozin, DG=Dapagliflozin and Glucose).

Treatment:

Drug: Saxagliptin

Drug: Dapagliflozin

Drug: Glucose

DS-DG-D

Experimental group

Description:

The arm label indicates the order of the given treatments in this crossover designed study (DS=Dapagliflozin and Saxagliptin, D=Dapagliflozin, DG=Dapagliflozin and Glucose).

Treatment:

Drug: Saxagliptin

Drug: Dapagliflozin

Drug: Glucose

D-DG-DS

Experimental group

Description:

The arm label indicates the order of the given treatments in this crossover designed study (DS=Dapagliflozin and Saxagliptin, D=Dapagliflozin, DG=Dapagliflozin and Glucose).

Treatment:

Drug: Saxagliptin

Drug: Dapagliflozin

Drug: Glucose

D-DS-DG

Experimental group

Description:

The arm label indicates the order of the given treatments in this crossover designed study (DS=Dapagliflozin and Saxagliptin, D=Dapagliflozin, DG=Dapagliflozin and Glucose).

Treatment:

Drug: Saxagliptin

Drug: Dapagliflozin

Drug: Glucose

DG-D-DS

Experimental group

Description:

The arm label indicates the order of the given treatments in this crossover designed study (DS=Dapagliflozin and Saxagliptin, D=Dapagliflozin, DG=Dapagliflozin and Glucose).

Treatment:

Drug: Saxagliptin

Drug: Dapagliflozin

Drug: Glucose

DG-DS-D

Experimental group

Description:

The arm label indicates the order of the given treatments in this crossover designed study (DS=Dapagliflozin and Saxagliptin, D=Dapagliflozin, DG=Dapagliflozin and Glucose).

Treatment:

Drug: Saxagliptin

Drug: Dapagliflozin

Drug: Glucose