CLINICAL PHARMACOLOGY
Mechanism Of Action
TRULICITY contains dulaglutide, which is a human GLP-1 receptor agonist with 90% amino acid sequence homology to endogenous human GLP-1 (7-37). Dulaglutide activates the GLP-1 receptor, a membrane-bound cell-surface receptor coupled to adenylyl cyclase in pancreatic beta cells. Dulaglutide increases intracellular cyclic AMP (cAMP) in beta cells leading to glucose-dependent insulin release. Dulaglutide also decreases glucagon secretion and slows gastric emptying.
Pharmacodynamics
TRULICITY lowers fasting glucose and reduces postprandial glucose (PPG) concentrations in patients with type 2 diabetes mellitus. The reduction in fasting and postprandial glucose can be observed after a single dose.
Fasting And Postprandial Glucose
In a clinical pharmacology study in adults with type 2 diabetes mellitus, treatment with once weekly TRULICITY resulted in a reduction of fasting and 2-hour PPG concentrations, and postprandial serum glucose incremental AUC, when compared to placebo (-25.6 mg/dL, -59.5 mg/dL, and -197 mg*h/dL, respectively); these effects were sustained after 6 weeks of dosing with the 1.5 mg dose.
First-And Second-Phase Insulin Secretion
Both first-and second-phase insulin secretion were increased in patients with type 2 diabetes treated with TRULICITY compared with placebo.
Insulin and Glucagon Secretion TRULICITY stimulates glucose-dependent insulin secretion and reduces glucagon secretion. Treatment with TRULICITY 0.75 mg and 1.5 mg once weekly increased fasting insulin from baseline at Week 26 by 35.38 and 17.50 pmol/L, respectively, and C-peptide concentration by 0.09 and 0.07 nmol/L, respectively, in a Phase 3 monotherapy study. In the same study, fasting glucagon concentration was reduced by 1.71 and 2.05 pmol/L from baseline with TRULICITY 0.75 mg and 1.5 mg, respectively.
Gastric Motility
Dulaglutide causes a delay of gastric emptying. The delay is largest after the first dose and diminishes with subsequent doses.
Cardiac Electrophysiology (QTc)
The effect of dulaglutide on cardiac repolarization was tested in a thorough QTc study. Dulaglutide did not produce QTc prolongation at supratherapeutic doses of 4 and 7 mg.
Pharmacokinetics
The pharmacokinetics of dulaglutide is similar between healthy subjects and patients with type 2 diabetes mellitus. Following subcutaneous administration, the time to maximum plasma concentration of dulaglutide at steady state ranges from 24 to 72 hours, with a median of 48 hours. After multiple-dose administration of 1.5 mg to steady state, the mean peak plasma concentration (Cmax) and total systemic exposure (AUC) of dulaglutide were 114 ng/mL (range 56 to 231 ng/mL) and 14,000 ng*h/mL (range 6940 to 26,000 ng*h/mL), respectively; accumulation ratio was approximately 1.56. Steady-state plasma dulaglutide concentrations were achieved between 2 and 4 weeks following once weekly administration. Site of subcutaneous administration (abdomen, upper arm, and thigh) had no statistically significant effect on the exposure to dulaglutide.
Absorption
The mean absolute bioavailability of dulaglutide following subcutaneous administration of single 0.75 mg and 1.5 mg doses was 65% and 47%, respectively.
Distribution
The mean volumes of distribution after subcutaneous administration of TRULICITY 0.75 mg and 1.5 mg to steady state were approximately 19.2 L (range 14.3 to 26.4 L) and 17.4 L (range 9.3 to 33 L), respectively.
Metabolism
Dulaglutide is presumed to be degraded into its component amino acids by general protein catabolism pathways.
Elimination
The mean apparent clearance at steady state of dulaglutide is approximately 0.111 L/h for the 0.75 mg dose, and 0.107 L/h for the 1.5 mg dose. The elimination half-life of dulaglutide for both doses is approximately 5 days.
Specific Populations
No dose adjustment of dulaglutide is needed based on age, gender, race, ethnicity, body weight, or renal or hepatic impairment. The effects of intrinsic factors on the PK of dulaglutide are shown in Figure 1.
Figure 1: Impact of intrinsic factors on dulaglutide pharmacokinetics.
Abbreviations: AUC = area under the time-concentration curve; CI = confidence interval; Cmax = maximum concentration; ESRD = end-stage renal disease; PK = pharmacokinetics.
Note: Reference values for weight, age, gender, and race comparisons are 93 kg, 56 years old, male, and white, respectively; reference groups for renal and hepatic impairment data are subjects with normal renal and hepatic function from the respective clinical pharmacology studies. The weight values shown in the plot (70 and 120 kg) are the 10th and 90th percentiles of weight in the Phase 3 PK population.
Renal
Dulaglutide systemic exposure was increased by 20, 28, 14 and 12% for mild, moderate, severe, and ESRD renal impairment sub-groups, respectively, compared to subjects with normal renal function. The corresponding values for increase in Cmax were 13, 23, 20 and 11%, respectively (Figure 1). Additionally, in a 52 week Phase 3 study in patients
with type 2 diabetes and moderate to severe renal impairment, the PK behavior of TRULICITY 0.75 mg and 1.5 mg once weekly was similar to that demonstrated in previous clinical studies [see WARNINGS AND PRECAUTIONS , Use In Specific Populations].
Hepatic
Dulaglutide systemic exposure decreased by 23, 33 and 21% for mild, moderate and severe hepatic impairment groups, respectively, compared to subjects with normal hepatic function, and Cmax was decreased by a similar magnitude (Figure 1). [see Use In Specific Populations].
Drug Interactions
The potential effect of co-administered medications on the PK of dulaglutide and vice versa was studied in several single-and multiple-dose studies in healthy subjects, patients with type 2 diabetes mellitus, and patients with hypertension.
Potential For Dulaglutide To Influence The Pharmacokinetics Of Other Drugs
Dulaglutide slows gastric emptying and, as a result, may reduce the extent and rate of absorption of orally co-administered medications. In clinical pharmacology studies, dulaglutide did not affect the absorption of the tested orally administered medications to any clinically relevant degree.
Pharmacokinetic (PK) measures indicating the magnitude of these interactions are presented in Figure 2. No dose adjustment is recommended for any of the evaluated co-administered medications.
Figure 2: Impact of dulaglutide on the pharmacokinetics of co-administered medications.
Abbreviations: AUC = area under the time-concentration curve; CI = confidence interval; Cmax = maximum concentration; PK = pharmacokinetics.
Note: Reference group is co-administered medication given alone.
Potential For Co-Administered Drugs To Influence The Pharmacokinetics Of Dulaglutide
In a clinical pharmacology study, the co-administration of a single dose of dulaglutide (1.5 mg) with steady-state sitagliptin (100 mg) caused an increase in dulaglutide AUC and Cmax of approximately 38% and 27%, which is not considered clinically relevant.
Animal Toxicology And/Or Pharmacology
Zucker diabetic fatty (ZDF) rats were given 0.5, 1.5, or 5.0 mg/kg/twice weekly of dulaglutide (3-, 8-, and 30-fold the MRHD based on AUC) for 3 months. Increases of 12% to 33% in total and pancreatic amylase, but not lipase, were observed at all doses without microscopic pancreatic inflammatory correlates in individual animals. Other changes in the dulaglutide-treated animals included increased interlobular ductal epithelium without active ductal cell proliferation (≥0.5 mg/kg), increased acinar atrophy with/without inflammation (≥1.5 mg/kg), and increased neutrophilic inflammation of the acinar pancreas (5 mg/kg).
Treatment of monkeys for 12 months with 8.15 mg/kg/twice weekly of dulaglutide (nearly 500-fold the MRHD based on AUC) demonstrated no evidence of pancreatic inflammation or pancreatic intraepithelial neoplasia. In 4 of 19 monkeys on dulaglutide treatment, there was an increase in goblet cells within the pancreatic ducts, but no differences from the control group in total amylase or lipase at study termination. There were no proliferative changes in the thyroid C-cells.
Clinical Studies
TRULICITY has been studied as monotherapy and in combination with metformin, sulfonylurea, metformin and sulfonylurea, metformin and thiazolidinedione, sodium-glucose co-transporter-2 inhibitors (SGLT2i) with or without metformin, basal insulin with or without metformin, and prandial insulin with or without metformin. TRULICITY has also been studied in patients with type 2 diabetes mellitus and moderate to severe renal impairment.
The studies evaluated the use of TRULICITY 0.75 mg and 1.5 mg. Uptitration was not performed in any of the trials; patients were initiated and maintained on either 0.75 mg or 1.5 mg for the duration of the trials.
In patients with type 2 diabetes mellitus, TRULICITY produced reductions from baseline in HbA1c compared to placebo. No overall differences in glycemic effectiveness were observed across demographic subgroups (age, gender, race/ethnicity, duration of diabetes).
Monotherapy
In a 52-week double-blind study (26-week primary endpoint), 807 patients inadequately treated with diet and exercise, or with diet and exercise and one antidiabetic agent used at submaximal dose, were randomized to TRULICITY 0.75 mg once weekly, TRULICITY 1.5 mg once weekly, or metformin 1500 to 2000 mg/day following a two-week washout. Seventy-five percent (75%) of the randomized population were treated with one antidiabetic agent at the screening visit. Most patients previously treated with an antidiabetic agent were receiving metformin (~90%) at a median dose of 1000 mg daily and approximately 10% were receiving a sulfonylurea.
Patients had a mean age of 56 years and a mean duration of type 2 diabetes of 3 years. Forty-four percent were male. The White, Black and Asian race accounted for 74%, 7% and 8% of the population, respectively. Twenty-nine percent of the study population were from the US.
Treatment with TRULICITY 0.75 mg and 1.5 mg once weekly resulted in reduction in HbA1c from baseline at the 26week primary timepoint (Table 3). The difference in observed effect size between TRULICITY 0.75 mg and 1.5 mg, respectively, and metformin excluded the pre-specified non-inferiority margin of 0.4%.
Table 3: Results at Week 26 in a Trial of TRULICITY as Monotherapya
|
26-Week Primary Time Point |
TRULICITY 0.75 mg |
TRULICITY 1.5 mg |
Metformin 1500-2000 mg |
Intent-to-Treat (ITT) Population (N)‡ |
270 |
269 |
268 |
HbA1c (%) (Mean) |
Baseline |
7.6 |
7.6 |
7.6 |
Change from baselineb |
-0.7 |
-0.8 |
-0.6 |
Fasting Serum Glucose (mg/dL) (Mean) |
Baseline |
161 |
164 |
161 |
Change from baselineb |
-26 |
-29 |
-24 |
Body Weight (kg) (Mean) |
Baseline |
91.8 |
92.7 |
92.4 |
Change from baselineb |
-1.4 |
-2.3 |
-2.2 |
Abbreviation: HbA1c = hemoglobin A1c.
a Intent-to-treat population. Last observation carried forward (LOCF) was used to impute missing data. Data post-onset of rescue therapy are treated as
missing. At Week 26, primary efficacy was missing for 10%, 12% and 14% of individuals randomized to TRULICITY 0.75 mg, TRULICITY 1.5 mg and
metformin, respectively.
b Least-squares mean adjusted for baseline value and other stratification factors.
‡ Subjects included in the analysis are a subset of the ITT population that had at least one post-baseline assessment. The primary analysis included 265 individuals in each of the treatment arms. |
Combination Therapy
Add-On To Metformin
In this 104-week placebo-controlled, double-blind study (52-week primary endpoint), 972 patients were randomized to placebo, TRULICITY 0.75 mg once weekly, TRULICITY 1.5 mg once weekly, or sitagliptin 100 mg/day (after 26 weeks, patients in the placebo treatment group received blinded sitagliptin 100 mg/day for the remainder of the study), all as add-on to metformin. Randomization occurred after an 11-week lead-in period to allow for a metformin titration period, followed by a 6-week glycemic stabilization period. Patients had a mean age of 54 years; mean duration of type 2 diabetes of 7 years; 48% were male; race: White, Black and Asian were 53%, 4% and 27%, respectively; and 24% of the study population were in the US.
At the 26-week placebo-controlled time point, the HbA1c change was 0.1%, -1.0%, -1.2%, and -0.6% for placebo, TRULICITY 0.75 mg, TRULICITY 1.5 mg, and sitagliptin, respectively. The percentage of patients who achieved HbA1c <7.0% was 22%, 56%, 62% and 39% for placebo, TRULICITY 0.75 mg, TRULICITY 1.5 mg, and sitagliptin, respectively. At 26 weeks, there was a mean weight reduction of 1.4 kg, 2.7 kg, 3.0 kg, and 1.4 kg for placebo, TRULICITY 0.75 mg, TRULICITY 1.5 mg, and sitagliptin, respectively. There was a mean reduction of fasting glucose of 9 mg/dL, 35 mg/dL, 41 mg/dL, and 18 mg/dL for placebo, TRULICITY 0.75 mg, TRULICITY 1.5 mg, and sitagliptin, respectively.
Treatment with TRULICITY 0.75 mg and 1.5 mg once weekly resulted in a statistically significant reduction in HbA1c compared to placebo (at 26 weeks) and compared to sitagliptin (at 26 and 52 weeks), all in combination with metformin (Table 4 and Figure 3).
Table 4: Results at Week 52 of TRULICITY Compared to Sitagliptin used as Add-On to Metformina
|
52-Week Primary Time Point |
TRULICITY 0.75 mg |
TRULICITY 1.5 mg |
Sitagliptin 100 mg |
Intent-to-Treat (ITT) Population (N)‡ |
281 |
279 |
273 |
HbA1c (%) (Mean) |
Baseline |
8.2 |
8.1 |
8.0 |
Change from baselineb |
-0.9 |
-1.1 |
-0.4 |
Difference from sitagliptinb (95% CI) |
-0.5
(-0.7, -0.3)†† |
-0.7
(-0.9, -0.5)†† |
- |
Percentage of patients HbA1c <7.0% |
49## |
59## |
33 |
Fasting Plasma Glucose (mg/dL) (Mean) |
Baseline |
174 |
173 |
171 |
Change from baselineb |
-30 |
-41 |
-14 |
Difference from sitagliptinb (95% CI) |
-15
(-22, -9) |
-27
(-33, -20) |
- |
Body Weight (kg) (Mean) |
Baseline |
85.5 |
86.5 |
85.8 |
Change from baselineb |
-2.7 |
-3.1 |
-1.5 |
Difference from sitagliptinb (95% CI) |
-1.2
(-1.8, -0.6) |
-1.5
(-2.1, -0.9) |
- |
Abbreviations: HbA1c = hemoglobin A1c.
a All ITT patients randomized after the dose-finding portion of the study. Last observation carried forward (LOCF) was used to impute missing data. At Week 52 primary efficacy was missing for 15%, 19%, and 20% of individuals randomized to TRULICITY 0.75 mg, TRULICITY 1.5 mg and sitagliptin, respectively.
b Least-squares (LS) mean adjusted for baseline value and other stratification factors.
‡ Subjects included in the analysis are a subset of the ITT population that had at least one post-baseline assessment. The primary analysis included 276, 277, and 270 individuals randomized to TRULICITY 0.75 mg, TRULICITY 1.5 mg and sitagliptin, respectively.
†† Multiplicity adjusted 1-sided p-value <0.001, for superiority of TRULICITY compared to sitagliptin, assessed only for HbA1c.
## p<0.001 TRULICITY compared to sitagliptin, assessed only for HbA1c <7.0%. |
Figure 3: Adjusted Mean HbA1c Change at each Time Point (ITT, MMRM) and at Week 52 (ITT, LOCF)
Number of subjects with observed data |
Placebo |
139 |
108 |
|
TRULICITY 0.75 mg |
281 |
258 |
238 |
TRULICITY 1.5 mg |
279 |
249 |
225 |
Sitagliptin |
273 |
241 |
219 |
Mean change from baseline adjusted for baseline HbA1c and country. |
Add-On To Sulfonylurea
In this 24-week placebo-controlled, double-blind study, 299 patients were randomized to and received placebo or once weekly TRULICITY 1.5 mg, both as add-on to glimepiride. Patients had a mean age of 58 years; mean duration of type 2 diabetes of 8 years; 44% were male; race: White, Black, and Asian were 83%, 4%, and 2%, respectively; and 24% of the study population were in the US.
At 24 weeks, treatment with once weekly TRULICITY 1.5 mg resulted in a statistically significant reduction in HbA1c compared to placebo (Table 5).
Table 5: Results at Week 24 of TRULICITY Compared to Placebo as Add-On to Glimepiridea
|
24-Week Primary Time Point |
Placebo |
TRULICITY 1.5 mg |
Intent-to-Treat (ITT) Population (N) |
60 |
239 |
HbA1c (%) (Mean) |
Baseline |
8.4 |
8.4 |
Change from baselineb |
-0.3 |
-1.3 |
Difference from placebob (95% CI) |
|
-1.1 (-1.4, -0.7)†† |
Percentage of patients HbA1c <7.0%c |
17 |
50†† |
Fasting Serum Glucose (mg/dL) (Mean) |
Baseline |
175 |
178 |
Change from baselineb |
2 |
-28 |
Difference from placebob (95% CI) |
|
-30 (-44, -15)†† |
Body Weight (kg) (Mean) |
Baseline |
89.5 |
84.5 |
Change from baselineb |
-0.2 |
-0.5 |
Difference from placebob (95% CI) |
|
|
Abbreviations: HbA1c = hemoglobin A1c.
a Intent-to-treat population. Data post-onset of rescue therapy are treated as missing. At Week 24 primary efficacy was missing for 10% and 12% of individuals randomized to TRULICITY 1.5 mg and placebo, respectively.
b Least-squares mean from ANCOVA adjusted for baseline value and other stratification factors. Placebo multiple imputation, with respect to the baseline values, was used to model a wash-out of the treatment effect for subjects having missing Week 24 data.
c Patients with missing HbA1c data at Week 24 were considered as non-responders.
†† p<0.001 for superiority of TRULICITY 1.5 mg compared to placebo, overall type I error controlled. |
Add-On To Metformin And Thiazolidinedione
In this 52-week placebo-controlled study (26-week primary endpoint), 976 patients were randomized to and received placebo, TRULICITY 0.75 mg once weekly, TRULICITY 1.5 mg once weekly, or exenatide 10 mcg BID, all as add-on to maximally tolerated doses of metformin (≥1500 mg per day) and pioglitazone (up to 45 mg per day). Exenatide treatment group assignment was open-label while the treatment assignments to placebo, TRULICITY 0.75 mg, and TRULICITY 1.5 mg were blinded. After 26 weeks, patients in the placebo treatment group were randomized to either TRULICITY 0.75 mg once weekly or TRULICITY 1.5 mg once weekly to maintain study blind. Randomization occurred after a 12-week lead-in period; during the initial 4 weeks of the lead-in period, patients were titrated to maximally tolerated doses of metformin and pioglitazone; this was followed by an 8-week glycemic stabilization period prior to randomization. Patients randomized to exenatide started at a dose of 5 mcg BID for 4 weeks and then were escalated to 10 mcg BID. Patients had a mean age of 56 years; mean duration of type 2 diabetes of 9 years; 58% were male; race: White, Black and Asian were 74%, 8% and 3%, respectively; and 81% of the study population were in the US.
Treatment with TRULICITY 0.75 mg and 1.5 mg once weekly resulted in a statistically significant reduction in HbA1c compared to placebo (at 26 weeks) and compared to exenatide at 26 weeks (Table 6 and Figure 4). Over the 52-week study period, the percentage of patients who required glycemic rescue was 8.9% in the TRULICITY 0.75 mg once weekly + metformin and pioglitazone treatment group, 3.2% in the TRULICITY 1.5 mg once weekly + metformin and pioglitazone treatment group, and 8.7% in the exenatide BID + metformin and pioglitazone treatment group.
Table 6: Results at Week 26 of TRULICITY Compared to Placebo and Exenatide, All as Add-On to Metformin and
Thiazolidinedionea
|
26-Week Primary Time Point |
Placebo |
TRULICITY 0.75 mg |
TRULICITY 1.5 mg |
Exenatide 10 mcg BID |
Intent-to-Treat (ITT) Population (N)‡ |
141 |
280 |
279 |
276 |
HbA1c (%) (Mean) |
Baseline |
8.1 |
8.1 |
8.1 |
8.1 |
Change from baselineb |
-0.5 |
-1.3 |
-1.5 |
-1.0 |
Difference from placebob (95% CI) |
- |
-0.8
(-1.0, -0.7)†† |
-1.1
(-1.2, -0.9)†† |
- |
Difference from exenatideb (95% CI) |
- |
-0.3
(-0.4, -0.2)†† |
-0.5
(-0.7, -0.4)†† |
- |
Percentage of patients HbA1c <7.0% |
43 |
66**, ## |
78**, ## |
52 |
Fasting Serum Glucose (mg/dL) (Mean) |
Baseline |
166 |
159 |
162 |
164 |
Change from baselineb |
-5 |
-34 |
-42 |
-24 |
Difference from placebob (95% CI) |
- |
-30
(-36, -23) |
-38
(-45, -31) |
- |
Difference from exenatideb (95% CI) |
- |
-10
(-15, -5) |
-18
(-24, -13) |
- |
Body Weight (kg) (Mean) |
Baseline |
94.1 |
95.5 |
96.2 |
97.4 |
Change from baselineb |
1.2 |
0.2 |
-1.3 |
-1.1 |
Difference from placebob (95% CI) |
- |
-1.0
(-1.8, -0.3) |
-2.5
(-3.3, -1.8) |
- |
Difference from exenatideb (95% CI) |
- |
1.3
(0.6, 1.9) |
-0.2
(-0.9, 0.4) |
- |
Abbreviations: BID = twice daily; HbA1c = hemoglobin A1c.
a Intent-to-treat population. Last observation carried forward (LOCF) was used to impute missing data. Data post-onset of rescue therapy are treated as missing. At Week 26, primary efficacy was missing for 23%, 10%, 7% and 12% of individuals randomized to placebo, TRULICITY 0.75 mg, TRULICITY 1.5 mg, and exenatide, respectively.
b Least-squares (LS) mean adjusted for baseline value and other stratification factors.
‡ Subjects included in the analysis are a subset of the ITT population that had at least one post-baseline assessment. The primary analysis included 119, 269, 271 and 266 individuals randomized to placebo, TRULICITY 0.75 mg, TRULICITY 1.5 mg, and exenatide, respectively.
‡‡ Multiplicity adjusted 1-sided p-value <0.001, for superiority of TRULICITY compared to placebo, assessed only for HbA1c.
†† Multiplicity adjusted 1-sided p-value <0.001, for superiority of TRULICITY compared to exenatide, assessed only for HbA1c.
** p<0.001 TRULICITY compared to placebo, assessed only for HbA1c <7.0%.
## p<0.001 TRULICITY compared to exenatide, assessed only for HbA1c <7.0%. |
Figure 4: Adjusted Mean HbA1c Change at Each Time Point (ITT, MMRM) and at Week 26 (ITT, LOCF)
Number of subjects with observed data |
Placebo |
141 |
108 |
TRULICITY 0.75 mg |
280 |
251 |
TRULICITY 1.5 mg |
279 |
259 |
Sitagliptin |
276 |
242 |
Mean change from baseline adjusted for baseline HbA1c and country. |
Combination Therapy With SGLT2i, With Or Without Metformin
In this 24-week placebo-controlled, double-blind study, 423 patients were randomized to and received TRULICITY 0.75 mg, TRULICITY 1.5 mg, or placebo, as add-on to sodium-glucose co-transporter 2 inhibitor (SGLT2i) therapy (96% with and 4% without metformin). Trulicity was administered once weekly, and SGLT2i was administered according to the local country label. Patients had a mean age of 57 years; mean duration of type 2 diabetes of 9.4 years; 50% were male; race: White, Black, and Asian were 89%, 3%, and 0.2%, respectively; and 21% of the study population was in the US.
At 24 weeks, treatment with once weekly TRULICITY 0.75 mg and 1.5 mg resulted in a statistically significant reduction from baseline in HbA1c compared to placebo (Table 7).
The mean baseline body weight was 90.5, 91.1, and 92.9 kg in the placebo, TRULICITY 0.75 mg, and TRULICITY 1.5 mg groups, respectively. The mean changes from baseline in body weight at Week 24 were -2.0, -2.5, and -2.9 kg for placebo, TRULICITY 0.75 mg, and TRULICITY 1.5 mg, respectively. The difference from placebo (95% CI) was -0.9 kg (-1.7, -0.1) for TRULICITY 1.5 mg.
Table 7: Results at Week 24 of TRULICITY as Add-on to SGLT2ia
|
24-Week Primary Time Point |
Placebo |
TRULICITY 0.75 mg |
TRULICITY 1.5 mg |
Intent-to-Treat (ITT) Population (N) |
140 |
141 |
142 |
HbA1c (%) (Mean) |
Baseline |
8.1 |
8.1 |
8.0 |
Change from baselineb |
-0.6 |
-1.2 |
-1.3 |
Difference from placebob (95% CI) |
- |
-0.7
(-0.8, -0.5)†† |
-0.8
(-0.9, -0.6)†† |
Percentage of patients HbA1c <7.0%c |
31 |
59†† |
67†† |
Fasting Serum Glucose (mg/dL) (Mean) |
Baseline |
153 |
162 |
161 |
Change from baselineb |
-6 |
-25 |
-30 |
Difference from placebob (95% CI) |
- |
-19
(-25, -13) |
-24
(-30, -18)†† |
Abbreviations: HbA1c = hemoglobin A1c; SGLT2i = sodium-glucose co-transporter-2 inhibitors.
a Intent-to-treat population. At Week 24, primary efficacy was missing for 3%, 4%, and 6% of individuals treated with placebo, TRULICITY 0.75 mg, and TRULICITY 1.5 mg, respectively.
b Least-squares mean adjusted for baseline value and other stratification factors. Placebo multiple imputation, using baseline and 24-week values from
the placebo arm, was applied to model a washout of the treatment effect for patients missing 24-week values (HbA1c, fasting serum glucose, and
body weight).
c Patients with missing HbA1c data at Week 24 were considered as non-responders.
†† p<0.001 for superiority of TRULICITY compared to placebo, overall type I error controlled. |
Add-On To Metformin And Sulfonylurea
In this 78-week (52-week primary endpoint) open-label comparator study (double-blind with respect to TRULICITY dose assignment), 807 patients were randomized to and received TRULICITY 0.75 mg once weekly, TRULICITY 1.5 mg once weekly, or insulin glargine once daily, all as add-on to maximally tolerated doses of metformin and glimepiride. Randomization occurred after a 10-week lead-in period; during the initial 2 weeks of the lead-in period, patients were titrated to maximally tolerated doses of metformin and glimepiride. This was followed by a 6-to 8-week glycemic stabilization period prior to randomization.
Patients randomized to insulin glargine were started on a dose of 10 units once daily. Insulin glargine dose adjustments occurred twice weekly for the first 4 weeks of treatment based on self-measured fasting plasma glucose (FPG), followed by once weekly titration through Week 8 of study treatment, utilizing an algorithm that targeted a fasting plasma glucose of <100 mg/dL. Only 24% of patients were titrated to goal at the 52-week primary endpoint. The dose of glimepiride could be reduced or discontinued after randomization (at the discretion of the investigator) in the event of persistent hypoglycemia. The dose of glimepiride was reduced or discontinued in 28%, 32%, and 29% of patients randomized to TRULICITY 0.75 mg, TRULICITY 1.5 mg, and glargine.
Patients had a mean age of 57 years; mean duration of type 2 diabetes of 9 years; 51% were male; race: White, Black and Asian were 71%, 1% and 17%, respectively; and 0% of the study population were in the US.
Treatment with TRULICITY once weekly resulted in a reduction in HbA1c from baseline at 52 weeks when used in combination with metformin and sulfonylurea (Table 8). The difference in observed effect size between TRULICITY 0.75 mg and 1.5 mg, respectively, and glargine in this trial excluded the pre-specified non-inferiority margin of 0.4%.
Table 8: Results at Week 52 of TRULICITY Compared to Insulin Glargine, Both as Add-on to Metformin and
Sulfonylureaa
|
52-Week Primary Time Point |
TRULICITY 0.75 mg |
TRULICITY 1.5 mg |
Insulin Glargine |
Intent-to-Treat (ITT) Population (N)‡ |
272 |
273 |
262 |
HbA1c (%) (Mean) |
Baseline |
8.1 |
8.2 |
8.1 |
Change from baselineb |
-0.8 |
-1.1 |
-0.6 |
Fasting Serum Glucose (mg/dL) (Mean) |
Baseline |
161 |
165 |
163 |
Change from baselineb |
-16 |
-27 |
-32 |
Difference from insulin glargineb (95% CI) |
16 (9, 23) |
5 (-2, 12) |
- |
Body Weight (kg) (Mean) |
Baseline |
86.4 |
85.2 |
87.6 |
Change from baselineb |
-1.3 |
-1.9 |
1.4 |
Difference from insulinb (95% CI) |
-2.8
(-3.4, -2.2) |
-3.3
(-3.9, -2.7) |
- |
Abbreviations: HbA1c = hemoglobin A1c.
a Intent-to-treat population. Last observation carried forward (LOCF) was used to impute missing data. Data post-onset of rescue therapy are treated as
missing. At Week 52, primary efficacy was missing for 17%, 13% and 12% of individuals randomized to TRULICITY 0.75 mg, TRULICITY 1.5 mg and
glargine, respectively.
b Least-squares (LS) mean adjusted for baseline value and other stratification factors.
‡ Subjects included in the analysis are a subset of the ITT population that had at least one post-baseline assessment. The primary analysis included 267, 263 and 259 individuals randomized to TRULICITY 0.75 mg, TRULICITY 1.5 mg, and glargine, respectively. |
Combination Therapy With Basal Insulin, With Or Without Metformin
In this 28-week placebo-controlled, double-blind study, 300 patients were randomized to placebo or once weekly TRULICITY 1.5 mg, as add-on to titrated basal insulin glargine (with or without metformin). Patients had a mean age of 60 years; mean duration of type 2 diabetes of 13 years; 58% were male; race: White, Black, and Asian were 94%, 4%, and 0.3%, respectively; and 20% of the study population was in the US.
The mean starting dose of insulin glargine was 37 units/day for patients receiving placebo and 41 units/day for patients receiving TRULICITY 1.5 mg. At randomization, the initial insulin glargine dose in patients with HbA1c <8.0% was reduced by 20%.
At 28 weeks, treatment with once weekly TRULICITY 1.5 mg resulted in a statistically significant reduction in HbA1c compared to placebo (Table 9).
Table 9: Results at Week 28 of TRULICITY Compared to Placebo as Add-On to Basal Insulina
|
28-Week Primary Time Point |
Placebo |
TRULICITY 1.5 mg |
Intent-to-Treat (ITT) Population (N) |
150 |
150 |
HbA1c (%) (Mean) |
Baseline |
8.3 |
8.4 |
Change from baselineb |
-0.7 |
-1.4 |
Difference from placebob (95% CI) |
|
-0.7
(-0.9, -0.5)†† |
Percentage of patients HbA1c <7.0%c |
33 |
67†† |
Fasting Serum Glucose (mg/dL) (Mean) |
Baseline |
156 |
157 |
Change from baselineb |
-30 |
-44 |
Difference from placebob (95% CI) |
|
-14 (-23, -4)‡ |
Body Weight (kg) (Mean) |
Baseline |
92.6 |
93.3 |
Change from baselineb |
0.8 |
-1.3 |
Difference from placebob (95% CI) |
|
-2.1
(-2.9, -1.4)†† |
Abbreviations: HbA1c = hemoglobin A1c.
a Intent-to-treat population. At Week 28, primary efficacy was missing for 12% and 8% of individuals randomized to placebo and TRULICITY 1.5 mg, respectively.
b Least-squares mean from ANCOVA adjusted for baseline value and other stratification factors. Placebo multiple imputation, with respect to baseline values, was used to model a wash-out of the treatment effect for subjects having missing Week 28 data.
c Patients with missing HbA1c data at Week 28 were considered as non-responders.
†† p<0.001 for superiority of TRULICITY 1.5 mg compared to placebo, overall type I error controlled.
‡ p≤0.005 for superiority of TRULICITY 1.5 mg compared to placebo, overall type I error controlled. |
Combination Therapy With Prandial Insulin, With Or Without Metformin
In this 52-week (26-week primary endpoint) open-label comparator study (double-blind with respect to TRULICITY dose assignment), 884 patients on 1 or 2 insulin injections per day were enrolled. Randomization occurred after a 9-week lead-in period; during the initial 2 weeks of the lead-in period, patients continued their pre-study insulin regimen but could be initiated and/or up-titrated on metformin, based on investigator discretion; this was followed by a 7-week glycemic stabilization period prior to randomization.
At randomization, patients discontinued their pre-study insulin regimen and were randomized to TRULICITY 0.75 mg once weekly, TRULICITY 1.5 mg once weekly, or insulin glargine once daily, all in combination with prandial insulin lispro 3 times daily, with or without metformin. Insulin lispro was titrated in each arm based on preprandial and bedtime glucose, and insulin glargine was titrated to a fasting plasma glucose goal of <100 mg/dL. Only 36% of patients randomized to glargine were titrated to the fasting glucose goal at the 26-week primary timepoint.
Patients had a mean age of 59 years; mean duration of type 2 diabetes of 13 years; 54% were male; race: White, Black and Asian were 79%, 10% and 4%, respectively; and 33% of the study population were in the US.
Treatment with TRULICITY 0.75 mg and 1.5 mg once weekly resulted in a reduction in HbA1c from baseline. The difference in observed effect size between TRULICITY 0.75 mg and 1.5 mg, respectively, and glargine in this trial excluded the pre-specified non-inferiority margin of 0.4%.
Table 10: Results at Week 26 of TRULICITY Compared to Insulin Glargine, Both in Combination with Insulin
Lisproa
|
26-Week Primary Time Point |
TRULICITY 0.75 mg |
TRULICITY 1.5 mg |
Insulin Glargine |
Intent-to-Treat (ITT) Population (N)‡ |
293 |
295 |
296 |
HbA1c (%) (Mean) |
Baseline |
8.4 |
8.5 |
8.5 |
Change from baselineb |
-1.6 |
-1.6 |
-1.4 |
Fasting Serum Glucose (mg/dL) (Mean) |
Baseline |
150 |
157 |
154 |
Change from baselineb |
4 |
-5 |
-28 |
Difference from insulin glargineb (95% CI) |
32 (24, 41) |
24 (15, 32) |
- |
Body Weight (kg) (Mean) |
Baseline |
91.7 |
91.0 |
90.8 |
Change from baselineb |
0.2 |
-0.9 |
2.3 |
Difference from insulin glargineb (95% CI) |
-2.2
(-2.8, -1.5) |
-3.2
(-3.8, -2.6) |
- |
Abbreviation: HbA1c = hemoglobin A1c
a Intent-to-treat population. Last observation carried forward (LOCF) was used to impute missing data. Data post-onset of rescue therapy are treated as missing. At Week 26, primary efficacy was missing for 14%, 15%, and 14% of individuals randomized to TRULICITY 0.75 mg, TRULICITY 1.5 mg and glargine, respectively.
b Least-squares (LS) mean adjusted for baseline value and other stratification factors.
‡ Subjects included in the analysis are a subset of the ITT population that had at least one post-baseline assessment. The primary analysis included 275, 273 and 276 individuals randomized to TRULICITY 0.75 mg, TRULICITY 1.5 mg, and glargine, respectively. |
Moderate To Severe Chronic Kidney Disease
In this 52-week (26-week primary endpoint) open-label comparator study (double-blind with respect to TRULICITY dose assignment), a total of 576 patients with type 2 diabetes were randomized and treated to compare TRULICITY 0.75 mg and 1.5 mg with insulin glargine (NCT01621178).
Patients on insulin and other antidiabetic therapy (e.g., oral antidiabetic drugs, pramlintide) had non-insulin therapies discontinued and had their insulin dose adjusted for 12 weeks prior to randomization. Patients on insulin therapy alone maintained a stable insulin dose for 3 weeks prior to randomization. At randomization, patients discontinued their prestudy insulin regimen and patients were randomized to TRULICITY 0.75 mg once weekly, TRULICITY 1.5 mg once weekly, or insulin glargine once daily, all in combination with prandial insulin lispro. For patients randomized to insulin glargine, the initial insulin glargine dose was based on the basal insulin dose prior to randomization. Insulin glargine was allowed to be titrated with a fasting plasma glucose goal of ≤150 mg/dL. Insulin lispro was allowed to be titrated with a preprandial and bedtime glucose goal of ≤180 mg/dL.
Patients had a mean age of 65 years; a mean duration of type 2 diabetes of 18 years; 52% were male; race: White, Black, and Asian were 69%, 16%, and 3%, respectively; and 32% of the study population were in the US. At baseline, overall mean eGFR was 38 mL/min/1.73 m2, 30% of patients had eGFR <30 mL/min/1.73 m2, and 45% of patients had macroalbuminuria. Patients on over 70 units/day of basal insulin were excluded from the study.
Treatment with TRULICITY 0.75 mg and 1.5 mg once weekly resulted in a reduction in HbA1c at 26-weeks from baseline. The difference in observed effect size between TRULICITY 0.75 mg and 1.5 mg, respectively, and glargine in this trial excluded the pre-specified non-inferiority margin of 0.4%. Mean fasting plasma glucose increased in the TRULICITY arms (Table 11).
Mean baseline body weight was 90.9 kg, 88.1 kg, and 88.2 kg in the TRULICITY 0.75 mg, TRULICITY 1.5 mg, and insulin glargine arms, respectively. The mean changes from baseline at Week 26 were -1.1, -2, and 1.9 kg in the TRULICITY 0.75 mg, TRULICITY 1.5 mg, and insulin glargine arms, respectively.
Table 11: Results at Week 26 of TRULICITY Compared to Insulin Glargine, Both in Combination with Insulin
Lispro, in Patients with Moderate to Severe Chronic Kidney Diseasea
|
26-Week Primary Time Point |
TRULICITY 0.75 mg |
TRULICITY 1.5 mg |
Insulin Glargine |
Intent-to-Treat Population (N) |
190 |
192 |
194 |
HbA1c (%) (Mean) |
Baseline |
8.6 |
8.6 |
8.6 |
Change from baselineb |
-0.9 |
-1.0 |
-1.0 |
Difference from insulin glargineb (95% CI) |
0.0
(-0.2, 0.3) |
-0.1
(-0.3, 0.2) |
|
Percentage of patients HbA1c <8.0% |
73 |
75 |
74 |
Fasting Serum Glucose (mg/dL) (Mean) |
Baseline |
167 |
161 |
170 |
Change from baselineb |
6 |
14 |
-23 |
Difference from insulin glargineb (95% CI) |
30 (16, 43) |
37 (24, 50) |
|
Abbreviation: HbA1c = hemoglobin A1c
a Intent-to-treat population (all randomized and treated subjects) was used in the analysis regardless of discontinuation of study drug or initiation of rescue therapy. At Week 26, primary efficacy was missing for 12%, 15%, and 9% of individuals randomized to and treated with TRULICITY 0.75 mg, TRULICITY 1.5 mg, and insulin glargine, respectively. Missing data were imputed using multiple imputation within treatment group.
b Least-squares (LS) mean from ANCOVA pattern mixture model adjusted for baseline value and other stratification factors. |