BYDUREON, another exenatide extended-release product, has been studied in combination with metformin, sulfonylurea, thiazolidinedione, sodium-glucose cotransporter-2 (SGLT2) inhibitor and basal insulin in adult patients with type 2 diabetes mellitus.
BYDUREON versus Sitagliptin and Pioglitazone, All as Add-on to Metformin Therapy
A 26-week double-blind comparator-controlled trial was conducted to compare the safety and efficacy of BYDUREON to sitagliptin and pioglitazone in patients with type 2 diabetes whose glycemic control was inadequate with metformin therapy (Trial 4 - NCT00637273). Patients were randomly assigned to receive BYDUREON 2 mg given subcutaneously once every 7 days (weekly), sitagliptin 100 mg/day or pioglitazone 45 mg/day, in addition to their existing metformin therapy.
A total of 491 patients were studied 168 (34.2%) were White, 143 (29.1%) were Hispanic or Latino, 119 (24.2%) were Asian, 52 (10.6%) were Black or African American, 3 (0.6%) were of Native American ethnicity, and 6 (1.2%) were classified otherwise. The mean baseline HbA1c was 8.5%.
The primary endpoint was change in HbA1c from baseline to Week 26 (or the last value at time of early discontinuation).
Efficacy Results:
In this study, treatment with BYDUREON 2 mg QW resulted in a statistically significant mean HbA1c reduction compared to sitagliptin 100 mg/day. There was a numerically greater reduction in HbA1c with BYDUREON compared to pioglitazone, but there was not sufficient evidence to conclude superiority of BYDUREON 2 mg QW to pioglitazone 45 mg/day in reducing HbA1c after 26 Weeks of treatment. Results for the primary endpoint at 26 Weeks are summarized in Table 7.
The proportion of patients with a Week 26 value achieving HbA1c of less than 7% at Week 26 were 46%, 30%, and 39% for BYDUREON, sitagliptin, and pioglitazone, respectively. Patients who did achieve an HbA1c goal <7% and discontinued before Week 26 were not included as responders. The mean changes from baseline to Week 26 for fasting serum glucose were -32 mg/dL, -16 mg/dL and -27 mg/dL, and for body weight were -2.3 kg, -0.8 kg and +2.8 kg for BYDUREON, sitagliptin, and pioglitazone, respectively.
Table 7: Results of 26-Week Trial of BYDUREON versus Sitagliptin and Pioglitazone, All as Add-On to Metformin Therapy in Patients with Type 2 Diabetes Mellitus (Trial 4) | BYDUREON 2 mg QW | Sitagliptin 100 mg/day | Pioglitazone 45 mg/day |
|---|
Intent-to-Treat Population (N) | 160 | 166 | 165 |
| HbA1c (%) |
Mean Baseline | 8.6 | 8.5 | 8.5 |
Mean Change at Week 26
| −1.5 | −0.9 | −1.2 |
Difference from sitagliptin [95% CI] | −0.63 [−0.89, −0.37] | | |
Difference from pioglitazone
[95% CI] | −0.32 [−0.57, −0.06] | | |
N = number of patients in each treatment group; mean change is least squares mean change; QW = once weekly. QW = once weekly. |
BYDUREON versus Insulin Glargine, Both as Add-on to Metformin or Metformin + Sulfonylurea Therapy
A 26-week open-label comparator-controlled trial was conducted to compare the safety and efficacy of BYDUREON to titrated insulin glargine in patients with type 2 diabetes whose glycemic control was inadequate with metformin or metformin plus sulfonylurea therapy (Trial 5 - NCT00641056). Patients were randomly assigned to receive BYDUREON 2 mg given subcutaneously once every 7 days (weekly) or insulin glargine once daily in addition to their existing oral antidiabetic therapy. Insulin glargine was dosed to a target fasting glucose concentration of 72 to 100 mg/dL.
The mean dose of insulin glargine was 10 units/day at baseline and 31 units/day at endpoint. At Week 26, 21% of insulin glargine-treated patients were at fasting glucose goal.
A total of 456 patients were studied: 379 (83.1%) were White, 47 (10.3%) were Hispanic or Latino, 25 (5.5%) were East Asian, 3 (0.7%) were Black or African American, and 2 (0.4%) were of West Asian ethnicity. Background therapy was either metformin (70%) or metformin plus sulfonylurea (30%). The mean baseline HbA1c was 8.3%.
The primary endpoint was change in HbA1c from baseline to Week 26 (or the last value at time of early discontinuation).
Efficacy Results:
Treatment with BYDUREON once weekly resulted in a mean reduction in HbA1c from baseline at 26 weeks of -1.5%. The mean reduction in HbA1c seen in insulin glargine arm at 26 weeks was -1.3%. The difference in observed effect size between BYDUREON and glargine in this trial excluded the pre-specified non-inferiority margin of +0.3%.
The proportion of patients with a Week 26 value achieving HbA1c of less than 7% at Week 26 were 57% and 48% for BYDUREON and insulin glargine, respectively. Patients who did achieve an HbA1c goal <7% and discontinued before Week 26 were not included as responders. The mean changes from baseline to Week 26 for fasting serum glucose in this study were -38 mg/dL and -50 mg/dL, and for body weight were -2.6 kg and +1.4 kg for BYDUREON and insulin glargine, respectively.
BYDUREON versus Liraglutide, Both as Add-on to Metformin, a Sulfonylurea, Metformin + Sulfonylurea, or Metformin + Pioglitazone Therapy
A 26-week open-label comparator-controlled trial was conducted to compare the safety and efficacy of BYDUREON to liraglutide in patients with type 2 diabetes whose glycemic control was inadequate with metformin, a sulfonylurea, metformin plus sulfonylurea, or metformin plus pioglitazone therapy (Trial 6 - NCT01029886). Patients were randomly assigned to receive BYDUREON 2 mg given subcutaneously once every 7 days (weekly) or liraglutide uptitrated from 0.6 mg/day to 1.2 mg/day, then 1.8 mg/day in addition to their existing oral antidiabetic therapy. Each titration was to be completed after at least one week, but could be delayed if the patient had severe nausea or vomiting as established by the investigator. Patients not tolerating the 1.8 mg/day dose of liraglutide by Week 4 were discontinued from the study.
A total of 911 patients were studied: 753 (82.7%) were White, 111 (12.2%) were Asian, 32 (3.5%) were American Indian or Alaska Native, 8 (0.9%) were of Black or African American ethnicity, 6 (0.7%) were multiple races, and 1 (0.1%) was Pacific Islander. Background therapy was either a single oral antidiabetic agent (35%) or a combination of oral antidiabetic agents (65%). The mean baseline HbA1c was 8.4%.
The primary endpoint was change in HbA1c from baseline to Week 26 (or the last value at time of early discontinuation).
Efficacy Results:
Treatment with BYDUREON once weekly resulted in a mean reduction in HbA1c from baseline at 26 weeks of -1.3%. The mean reduction in HbA1c seen in the liraglutide arm at 26 weeks was -1.5%. The HbA1c reduction with BYDUREON did not meet predefined non-inferiority criteria compared to liraglutide 1.8 mg/day. The non-inferiority margin was set at +0.25% in this study. Results for the primary endpoint at 26 weeks are summarized in Table 8.
The proportion of patients with a Week 26 value achieving HbA1c of less than 7% at Week 26 were 48% and 56% for BYDUREON and liraglutide, respectively. Patients who did achieve an HbA1c goal <7% and discontinued before Week 26 were not included as responders. The mean changes from baseline to Week 26 for fasting serum glucose were -32 mg/dL and -38 mg/dL, and for body weight were -2.7 kg and -3.6 kg for BYDUREON and liraglutide, respectively.
Table 8: Results of 26-Week Trial of BYDUREON versus Liraglutide, Both as Add-On to Metformin, a Sulfonylurea, Metformin + Sulfonylurea, or Metformin + Pioglitazone Therapy in Patients with Type 2 Diabetes Mellitus (Trial 6) | BYDUREON 2 mg QW | Liraglutide 1.8 mg/day |
|---|
Intent-to-Treat Population (N) | 461 | 450 |
HbA1c (%) |
Mean Baseline | 8.5 | 8.4 |
Mean Change at Week 26
| −1.3 | −1.5 |
Difference from liraglutide [95% CI] | 0.2 [0.08, 0.33] | |
N = number of patients in each treatment group; mean change is least squares mean change; QW = once weekly. HbA1c change data at 26 weeks were available from 85% and 86% of the randomized subjects in the BYDUREON and liraglutide groups, respectively. |
BYDUREON in Combination with Dapagliflozin versus BYDUREON Alone and Dapagliflozin Alone, All as Add-On to Metformin
A 28-week double-blind comparator-controlled trial was conducted to compare the efficacy of BYDUREON and dapagliflozin (an SGLT2 inhibitor) to BYDUREON alone and dapagliflozin alone in patients with type 2 diabetes with inadequate glycemic control with metformin therapy (Trial 7 - NCT02229396). All patients entered a 1- week placebo lead–in period. Patients with HbA1c ≥8.0% and ≤12% and on metformin at a dose of at least 1,500 mg per day were randomly assigned to receive either BYDUREON 2 mg given subcutaneously once every 7 days (weekly) plus dapagliflozin 10 mg once daily, BYDUREON 2 mg given subcutaneously once weekly, or dapagliflozin 10 mg once daily.
A total of 694 patients were studied; 580 (83.6%) were White, 96 (13.8%) were Black or African American, 5 (0.7%) were of Asian ethnicity, 2 (0.3%) were American Indian or Alaska Native, and 11 (1.6%) were classified otherwise. The mean baseline HbA1c was 9.3%.
The primary endpoint was change in HbA1c from baseline to Week 28.
Efficacy Results:
At Week 28, BYDUREON in combination with dapagliflozin provided statistically significantly greater reductions in HbA1c (-1.77%) compared to BYDUREON alone (-1.42%, p=0.012) and dapagliflozin alone (-1.32%, p=0.001). BYDUREON in combination with dapagliflozin provided statistically significantly greater reductions in FPG (-57.35 mg/dL) compared to BYDUREON alone (-40.53, p <0.001) and dapagliflozin alone (-44.72 mg/dL, p=0.006).
BYDUREON versus Placebo, Both as Add-On to Basal Insulin or Basal Insulin + Metformin Therapy
A 28-week, double-blind, placebo-controlled trial was conducted to compare the safety and efficacy of BYDUREON to placebo when added to basal insulin glargine, with or without metformin, in patients with type 2 diabetes with inadequate glycemic control (Trial 8 - NCT02229383). Patients on sulfonylurea therapy discontinued sulfonylurea. Patients on metformin continued the same dose of metformin. All patients initially entered an 8-week insulin dose-titration phase. Insulin glargine was to be titrated every 3 days with an aim of achieving a target fasting plasma glucose concentration of 72 to 99 mg/dL. Following the titration period, patients with HbA1c ≥7.0% and ≤10.5% were then randomly assigned to receive either BYDUREON 2 mg given subcutaneously once every 7 days (weekly) or placebo once every 7 days (weekly).
A total of 460 patients were studied: 400 (87.0%) were White, 47 (10.2%) were Black or African American, 6 (1.3%) were Asian, 1 (0.2%) was American Indian or Alaska Native, 1 (0.2%) was Pacific Islander, and 5 (1.1%) were classified otherwise.
The primary endpoint was the change in HbA1c from baseline to Week 28.
Efficacy Results:
Compared to placebo, treatment with BYDUREON resulted in a statistically significant reduction in mean HbA1c from baseline to Week 28 (Table 9).
The mean change in fasting plasma glucose from baseline to Week 28 was -12.50 mg/dL for BYDUREON and -2.26 mg/dL for placebo. The mean change from baseline to Week 28 in body weight was -0.92 kg for BYDUREON and +0.38 kg for placebo.
Table 9: Results of 28-Week Trial of BYDUREON versus Placebo, Both as Add-On to Insulin Glargine or Insulin Glargine + Metformin (Trial 8) | BYDUREON 2 mg QW | Placebo QW |
|---|
Intent-to-Treat Population (N) | 231 | 229 |
Mean HbA1c (%) |
Mean Baseline | 8.53 | 8.53 |
Mean Change at Week 28
| -0.88 (0.070) | -0.24 (0.069) |
Difference from Placebo [95% CI] | -0.64
[-0.83, -0.45] | |
Percentage Achieving HbA1c <7.0% at Week 28 (%) | 32.5†
| 7.0 |
N = number of patients in each treatment group, CI = confidence interval, QW = once weekly. Note: mean change is least squares mean change. |
Analyses include measurements post rescue therapy and post premature discontinuation of study medication.