A Study to Examine the Pharmacokinetics, Tolerability, Safety and Efficacy of Exenatide Once Weekly Suspension

A Two-Cohort, Single- and Repeat Dose Study to Examine the Pharmacokinetics, Tolerability, and Safety of Ready to Use Exenatide Once Weekly in Healthy Subjects and in Subjects With Type 2 Diabetes Mellitus

This study is designed to evaluate the pharmacokinetics, tolerability, and safety of exenatide once weekly suspension in both healthy subjects and in subjects with type 2 diabetes. The study will also evaluate efficacy in the type 2 diabetes patients. Development of this exenatide once weekly presentation would eliminate the need to reconstitute the product prior to use.

Study Overview

• Status: Completed
• Conditions: Type 2 Diabetes Mellitus
• Intervention / Treatment: Drug: exenatide once weekly; Drug: exenatide once weekly; Other: Placebo

• Study Type: Interventional
• Enrollment (Actual): 65
• Phase: Phase 2; Phase 1

Contacts and Locations

Study Locations

• United States
  • Nebraska
    • Lincoln, Nebraska, United States
      • Research Site

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 19 years to 75 years (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

Cohort 1:

• Is 19 to 65 years old
• Has a body mass index (BMI) of 23 kg/m2 to 35 kg/m2, inclusive, at study start

Cohort 2:

• Is 19 to 75 years old
• Has been diagnosed with type 2 diabetes mellitus
• Has HbA1c of 7.1% to 10.0%, inclusive, at study start
• Has a body mass index (BMI) of 25 kg/m2 to 45 kg/m2, inclusive, at study start
• Has been treated with diet and exercise alone or with a stable regimen of metformin, a TZD, or a combination of metformin and a TZD, for a minimum of 2 months prior to study start

• Either is not treated with or has been on a stable treatment regimen with any of the following medications for a minimum of 2 months prior to study start:

  • Hormone replacement therapy (female subjects)
  • Oral contraceptives (female subjects)
  • Antihypertensive agents
  • Lipid-lowering agents
  • Thyroid replacement therapy
  • Antidepressant agents

Exclusion Criteria:

Cohort 1:

• Has a personal history of diabetes mellitus (including impaired glucose tolerance, impaired fasting glucose, or gestational diabetes)
• Has received any investigational drug within 30 days (or 5 half-lives of the investigational drug, whichever is greater) prior to study start
• Has ever been exposed to exenatide (BYETTA, exenatide once weekly, or any other formulation of exenatide) or any GLP 1 analog

Cohort 2:

• Has received any investigational drug within 30 days (or 5 half-lives of the investigational drug, whichever is greater) prior to study start
• Has ever been exposed to exenatide (BYETTA, exenatide once weekly, or any other formulation of exenatide) or any GLP 1 analog

• Has been treated, is currently being treated, or is expected to require or undergo treatment with any of the following treatment-excluded medications:

  • Any DPP-4 inhibitor or sulfonylurea (SU) within 3 months prior to study start
  • Alpha glucosidase inhibitor, meglitinide, nateglinide, or pramlintide (SYMLIN®) within 30 days prior to study start
  • Insulin within 2 weeks prior to study start or for more than 1 week within 3 months prior to study start
  • Systemic corticosteroids by oral, intravenous, or intramuscular route; or potent, inhaled, or intrapulmonary (including ADVAIR®) steroids known to have a high rate of systemic absorption
  • Prescription or over-the-counter weight loss medications within 3 months prior to study start

Study Plan

How is the study designed?

Design Details

• Primary Purpose: TREATMENT
• Allocation: RANDOMIZED
• Interventional Model: PARALLEL
• Masking: SINGLE

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
EXPERIMENTAL: Cohort 1: Healthy Participants; A single 10-mg dose of exenatide once weekly suspension given to healthy participants via 3 subcutaneous (SC) injections at Day 1.	Drug: exenatide once weekly; subcutaneous injection, 10.0 mg, single injection; Drug: exenatide once weekly; subcutaneous injection, 2.0 mg, once a week for 12 weeks
EXPERIMENTAL: Cohort 2: Diabetes Participants; On Day 1, participants with type 2 diabetes mellitus treated with diet and exercise alone or with a stable regimen of metformin, thiazolidinedione (TZD), or a combination of metformin or TZD were randomized to receive weekly injections of exenatide suspension for 12 weeks.	Drug: exenatide once weekly; subcutaneous injection, 10.0 mg, single injection; Drug: exenatide once weekly; subcutaneous injection, 2.0 mg, once a week for 12 weeks
PLACEBO_COMPARATOR: Cohort 2: Diabetes Participants Placebo; On Day 1, participants with type 2 diabetes mellitus treated with diet and exercise alone or with a stable regimen of metformin, thiazolidinedione (TZD), or a combination of metformin or TZD were randomized to receive weekly injections of medium-chain triglycerides (MCT)-diluent placebo for 12 weeks.	Other: Placebo; subcutaneous injection, volume equivalent to Cohort 2 experimental intervention, once a week for 12 weeks

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Area Under the Curve (AUC) for Single Dose of 10 mg Exenatide (Cohort 1) in Healthy Participants in the Pharmacokinetic Evaluable Population	Cohort 1: Blood samples for the assessment of plasma exenatide were collected at time = -15, 60, 90, 120, 180, 240, 360, and 480 minutes relative to study medication injection at time = 0 on Day 1 and the mean is presented below. At all visits following the single injection, a single blood sample was collected for assessment of exenatide concentrations. AUC was measured in picograms * hours per milliliter (pg*hr/mL). Exenatide was measured using a validated enzyme-linked immunosorbent assay (ELISA). AUC calculated using linear trapezoidal method from time x to time y; AUC (0-8h) and (0-tlast) are presented below. Pharmacokinetic (PK) evaluable population consisted of all ITT participants who had at least 4 detectable plasma exenatide measurements [not less than (<) lower limits of quantification (LLOQ)] from Day 1 to Week 12 and had reliable PK data.	Day 1, Week 12
Maximum Concentration (Cmax) for Single Dose of 10 mg Exenatide (Cohort 1) in Healthy Participants in the Pharmacokinetic Evaluable Population	Cohort 1: Blood samples for the assessment of plasma exenatide were collected at time = -15, 60, 90, 120, 180, 240, 360, and 480 minutes relative to study medication injection at time = 0 on Day 1 and the mean is presented below. At all visits following the single injection, a single blood sample was collected for assessment of exenatide concentrations. Cmax was measured in picograms per milliliter (pg/mL). Exenatide concentration was measured using a validated enzyme-linked immunosorbent assay (ELISA). PK evaluable population consisted of all ITT participants who had at least 4 detectable plasma exenatide measurements [not less than (<) lower limits of quantification (LLOQ)] from Day 1 to Week 12 for the evaluation of the PK characteristics of plasma exenatide and had reliable PK data. Cmax (0-8h) and (0-tlast) are presented below.	Day 1, Week 12
Time to Maximum Concentration (Tmax) for Single Dose of 10 mg Exenatide (Cohort 1) in Healthy Participants in the Pharmacokinetic Evaluable Population	Cohort 1: Blood samples for the assessment of plasma exenatide were collected at time(t) = -15, 60, 90, 120, 180, 240, 360, and 480 minutes relative to study medication injection at time = 0 on Day 1 an the mean is presented below. At all visits following the single injection, a single blood sample was collected for assessment of exenatide concentrations. Tmax was measured in hours and Tmax (0-8h) and (0-tlast) are presented below. Exenatide concentration was measured using a validated enzyme-linked immunosorbent assay (ELISA). PK evaluable population consisted of all ITT participants who had at least 4 detectable plasma exenatide measurements [not less than (<) lower limits of quantification (LLOQ)] and had reliable PK data.	Day 1, Week 12
Number of Participants With Treatment Emergent Adverse Events (TEAEs), Injection Site TEAEs, Serious Adverse Events (SAEs), Deaths, and Withdrawals Due to AEs in Cohort 1 and Cohort 2 in Intent to Treat (ITT) Population	Treatment emergent (TE)=occurs during or after treatment with study drug. Adverse Event (AE)=any new unfavorable symptom, sign, or disease or worsening of a preexisting condition that may not have a causal relationship with treatment. SAE=a medical event that at any dose results in death, persistent or significant disability/incapacity, or drug dependency/abuse; is life-threatening, an important medical event, or a congenital anomaly/birth defect; or requires or prolongs hospitalization. Participants experiencing multiple episodes of a given AE are counted once. Injection site AEs: adverse events that existed prior to Day 1 and worsened after the first administration at Day 1, or occurred after the first administration at Day 1 through Week 12, or after Study Termination if considered by investigator to be clinically significant.	Day 1 to Week12
Number of Participants With Concomitant Medications in Cohort 1 and Cohort 2 in ITT Population	Concomitant medications are defined as those medications received on or after the date of the first injection on Day 1, including prior medications that continued past Day 1 and new concomitant medications. Participants may be counted in more than one medication class and no more than once in each class. Categories by Anatomical Therapeutic Chemical (ATC) classification using the World Health Organization (WHO) Drug Dictionary version C1, 01 March 2009. As per protocol, all participants in Cohort 1 could receive up to 2 anti-emetic medications approximately 30 minutes prior to the exenatide.	Day 1 to 12 weeks
Mean Change From Baseline to End of Study in Sitting Diastolic and Systolic Blood Pressure in Cohorts 1 and 2 in ITT Population	In Cohort 1, sitting blood pressures were obtained at Screening (Visit 1), Day 1 (Visit 2), Weeks 1-11 (Visits 3-13), Week 12 (Visit 14), and at early termination. Blood pressures (diastolic and systolic) were measured in millimeters of mercury (mmHg). In Cohort 2, sitting blood pressures were obtained at Screening (Visit 1), Day 1 (Visit 2), Weeks 1-10 (Visits 3-12), Week 11 (Visit 15), Week 12 (Visit 16) and at early termination. Baseline was defined as last measurement prior to first injection of study drug.	Day 1 to Week 12
Mean Change From Baseline to End of Study in Sitting Heart Rate in Cohorts 1 and 2 in ITT Population	In Cohort 1, sitting heart rates were obtained at Screening (Visit 1), Day 1 (Visit 2), Weeks 1-11 (Visits 3-13), Week 12 (Visit 14), and at early termination. Heart rate was measured in beats per minute (bpm). In Cohort 2, sitting heart rates were obtained at Screening (Visit 1), Day 1 (Visit 2), Weeks 1-10 (Visits 3-12), Week 11 (Visit 15), Week 12 (Visit 16) and at early termination. Baseline was defined as last measurement prior to first injection of study drug.	Day 1 to Week 12
Number of Participants With Hematology and Serum Chemistry Laboratory Values of Potential Clinical Importance in Cohorts 1 and 2 in ITT Population	Abbreviations: Upper Limit of Normal (ULN); milligram per deciliter (mg/dL); units per liter (U/L); micro liters (µL); creatine kinase (CK); gamma-glutamyltransferase (G-GT). Normal ranges = Hematocrit: 40.6-52.3% (male), 35.3-47.0 (female); Platelets 155-361*10^3/µL(male/female); Calcium: 8.6-10.4 mg/dL (male/female); CK: 43-350 U/L (male), 28-207 U/L (female); G-GT: 7-62 U/L (male/female); Glucose 73-105 mg/dL (male/female); Lipase 14-70 U/L (male/female); Uric acid: 3.5-7.8 mg/dL (male), 2.3-5.9 mg/dL (female). Blood samples for laboratories were collected at screening, Day 1, Weeks 4, 8, 12 or early termination. Value for potential clinical importance is presented in each category presented below.	Day 1 to Week 12
Antibody Titers for Participants With Treatment Emergent Positive Antibodies to Exenatide in Participants Who Received Exenatide in Cohorts 1 and 2	Serum titers of antibodies to exenatide were evaluated using a validated enzyme-linked immunosorbent assay (Covance Method No. ELISA-0308). Positive antibody to exenatide titer: observed at the indicated visit following a negative or missing titer at baseline, or a positive titer that has increased by at least 3 dilutions at the indicated visit from a detectable baseline. Baseline=Day 1. Negative titers were assigned a value of 1 in order to calculate geometric mean. Geometric mean of reportable titers, by study week, are presented below.	Day 1 to Week 12
Area Under the Curve (AUC) for 2 mg Exenatide (Cohort 2) in Participants With Diabetes in the Pharmacokinetic Evaluable Population	Cohort 2: Blood samples for the assessment of plasma exenatide were collected on Day 1, Weeks 2, 4, 6, 8, and 10. At Week 10, blood samples were collected at time = -15, 60, 90, 120, 180, 240, and 360 minutes relative to study medication injection at time = 0. AUC was measured in picograms * hours per milliliter (pg*hr/mL). Exenatide was measured using a validated enzyme-linked immunosorbent assay (ELISA). AUC calculated using linear trapezoidal method from time x to time y; AUC (0-6h) measured at Week 10, AUC (0-168h) steady state measured between Weeks 10 and 11, and AUC (0-tlast) for time interval between Weeks 10 and 12 (approximately336 hours) are presented below. PK evaluable population consisted of all ITT participants who had at least 4 detectable plasma exenatide measurements (not < LLOQ) from Day 1 to Week 12 and had reliable PK data.	Week 10-11; Weeks 10 - 12
Average Exenatide Concentration (Cave) of 2 mg Exenatide (Cohort 2) in Participants With Diabetes in the Pharmacokinetic Evaluable Population	Cohort 2: Blood samples for the assessment of plasma exenatide were collected on Day 1, Weeks 2, 4, 6, 8, and 10. At Week 10, blood samples were collected at time = -15, 60, 90, 120, 180, 240, and 360 minutes relative to study medication injection at time = 0. At all visits following the single injection, a single blood sample was collected for assessment of exenatide concentrations. Cave(0-168h) and Cave(0-tlast) was the time-weighted mean concentration over the sampling period from time x to time y corresponding to AUC (0-168h), and AUC (0-tlast), respectively. Cave was measured in picograms per milliliter (pg/mL). Exenatide concentration was measured using a validated enzyme-linked immunosorbent assay (ELISA). PK evaluable population consisted of all ITT participants who had at least 4 detectable plasma exenatide measurements (not < LLOQ) from Day 1 to Week 12 and had reliable PK data.	Week 10 - Week 11; Week 10 - Week 12
Maximum Concentration (Cmax) for 2 mg Exenatide (Cohort 2) in Participants With Diabetes in the Pharmacokinetic Evaluable Population	Cohort 2: Blood samples for the assessment of plasma exenatide were collected on Day 1, Weeks 2, 4, 6, 8, and 10. At Week 10, blood samples were collected at time = -15, 60, 90, 120, 180, 240, and 360 minutes relative to study medication injection at time = 0. Cmax was measured in pg/mL. Exenatide was measured using a validated enzyme-linked immunosorbent assay (ELISA). Cmax summarized at 0-6 h at Week 10, 0-168 h at Weeks 10-11, and 0-tlast at Weeks 10-12. PK evaluable population consisted of all ITT participants who had at least 4 detectable plasma exenatide measurements (not < LLOQ) from Day 1 to Week 12 and had reliable PK data.	Week 10, Weeks 10-11, Weeks 10-12
Time to Maximum Concentration (Tmax) of 2 mg Exenatide (Cohort 2) in Participants With Diabetes in Pharmacokinetic Evaluable Population	Cohort 2: Blood samples for the assessment of plasma exenatide were collected on Day 1, Weeks 2, 4, 6, 8, and 10. At Week 10, blood samples were collected at time = -15, 60, 90, 120, 180, 240, and 360 minutes relative to study medication injection at time = 0. Tmax was measured in hours (h). Exenatide was measured using a validated ELISA. Tmax summarized at 0-6 h at Week 10, 0-168 h at Weeks 10-11, and 0-tlast at Weeks 10-12. PK evaluable population consisted of all ITT participants who had at least 4 detectable plasma exenatide measurements (not < LLOQ) from Day 1 to Week 12 and had reliable PK data.	Week 10, Weeks 10-11, Weeks 10-12

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
AUC (0 Hour to 168 Hour) for 10 mg Exenatide (Cohort 1) in Healthy Participants in the Pharmacokinetic Evaluable Population	Cohort 1: Blood samples for the assessment of plasma exenatide were collected at time = -15, 60, 90, 120, 180, 240, 360, and 480 minutes relative to study medication injection at time = 0 on Day 1. At all visits following the single injection, a single blood sample was collected for assessment of exenatide concentrations. AUC (0-168 h) data represents average concentration rather than maximum concentration. Exenatide concentration was measured using a validated enzyme-linked immunosorbent assay (ELISA). AUC calculated using linear trapezoidal method from time x to time y and measured in pg*h/mL. PK evaluable population consisted of all ITT participants who had at least 4 detectable plasma exenatide measurements (not < LLOQ) from Day 1 to Week 12 and had reliable PK data.	Day 1 to Week 1
Average Exenatide Concentration (Cave) of 10 mg Exenatide (Cohort 1) in Healthy Participants in the Pharmacokinetic Evaluable Population	Cohort 1: Blood samples for the assessment of plasma exenatide were collected at time = -15, 60, 90, 120, 180, 240, 360, and 480 minutes relative to study medication injection at time = 0 on Day 1. At all visits following the single dose, a single blood sample was collected for assessment of exenatide concentrations. Cave(0-168h) was the time-weighted mean concentration over the sampling period from time x to time y corresponding to AUC (0-168h) and was measured in picograms per milliliter (pg/mL). Exenatide concentration was measured using a validated enzyme-linked immunosorbent assay (ELISA). PK evaluable population consisted of all ITT participants who had at least 4 detectable plasma exenatide measurements [not less than (<) lower limits of quantification (LLOQ)] from Day 1 to Week 12 and had reliable PK data.	Day 1 to Week 1
Least Square Mean Change From Baseline in Hemoglobin A1c (HbA1c) to Week 12 in Participants With Diabetes (Cohort 2) in the ITT Population	HbA1c was measured as a percent of hemoglobin at screening, Day 1, Weeks 4, 8, 12 or early termination. Last observation carried forward (LOCF) was applied to estimate missing values at post baseline timepoints. Baseline=Day 1, last measurement prior to first dose of study drug.	Day 1 to Week 12
Number of Participants Achieving HbA1c Less Than Equal to (<=) 6.5% and Less Than (<) 7% at Week 12 in Participants With Diabetes (Cohort 2) in the ITT Population	HbA1c was measured as a percent of hemoglobin at screening, Day 1, Weeks 4, 8, 12 or early termination. LOCF was applied to estimate missing values at post baseline timepoints. Baseline=Day 1, last measurement prior to first dose of study drug.	Week 12
Mean Change From Baseline at Week 12 in Body Weight in Participants With Diabetes (Cohort 2) in the ITT Population	Body weight was measured in kilograms (kg). Baseline was Day 1, last measurement prior to first dose of study drug. Body weight was measured at screening, Day 1, Weeks 4, 8, 12 or early termination and the LOCF approach was applied to estimate missing value at each post baseline timepoint.	Baseline, Week 12
Mean Change From Baseline at Week 12 in Fasting Plasma Glucose in Participants With Diabetes (Cohort 2) for the ITT Population	Baseline was the last measurement at the screening visit. Fasting plasma glucose (FPG) was measured at screening, Day 1, Weeks 2, 4, 6, 8, 12, or early termination and reported in milligrams per deciliter (mg/dL).	Baseline, Week 12

Collaborators and Investigators

• Sponsor: AstraZeneca
• Collaborators: Eli Lilly and Company
• Investigators: Study Director: Vice President, Clinical Development, Amylin Pharmaceuticals, LLC.

Publications and helpful links

Helpful Links

• CSR_Synopsis

Study record dates

Study Major Dates

• Study Start: April 1, 2009
• Primary Completion (ACTUAL): August 1, 2009
• Study Completion (ACTUAL): August 1, 2009

Study Registration Dates

• First Submitted: May 5, 2009
• First Submitted That Met QC Criteria: May 6, 2009
• First Posted (ESTIMATE): May 7, 2009

Study Record Updates

• Last Update Posted (ESTIMATE): September 18, 2015
• Last Update Submitted That Met QC Criteria: September 3, 2015
• Last Verified: August 1, 2015

More Information

Terms related to this study

• Keywords: diabetes; Lilly; Amylin; Byetta; exenatide once weekly
• Additional Relevant MeSH Terms: Glucose Metabolism Disorders; Metabolic Diseases; Endocrine System Diseases; Diabetes Mellitus; Diabetes Mellitus, Type 2; Hypoglycemic Agents; Physiological Effects of Drugs; Hormones; Hormones, Hormone Substitutes, and Hormone Antagonists; Anti-Obesity Agents; Incretins; Exenatide
• Other Study ID Numbers: BCB110