Changes in β-Cell Function and Insulin Sensitivity During Treatment With Dapagliflozin Alone or in Combination With Exenatide in Type 2 Diabetes
Abstract
Objective: To examine the effects of sodium-glucose cotransporter 2 inhibitors (SGLT2is) alone or with glucagon-like peptide 1 receptor agonists (GLP-1RAs) on β-cell function (BCF) in type 2 diabetes. The hypothesis was that an SGLT2i combined with a GLP-1RA provides superior improvement in BCF than either agent alone.
Research design and methods: Ninety patients underwent a 180-min oral glucose tolerance test (OGTT) 1) after one drug dose (acute study) (placebo [n = 15], dapagliflozin [n = 25], exenatide [n = 25], and dapagliflozin/exenatide [n = 25]) and 2) after 1 and 4 months of therapy. Corrected Matsuda index (cMI) for urinary glucose loss, insulin secretion, and BCF indices were calculated during OGTT.
Results: In the acute study, mean ± SEM cMI in dapagliflozin (2.29 ± 0.33), exenatide (2.03 ± 0.12), and dapagliflozin/exenatide (2.36 ± 0.14) was higher (P < 0.05) than placebo (1.63 ± 0.36). After 1 and 4 months, cMI remained similarly elevated in exenatide and increased further (P < 0.001) in dapagliflozin and dapagliflozin/exenatide. In the acute study, insulin secretion in dapagliflozin was similar to placebo but higher (P < 0.001 vs. both) in exenatide and dapagliflozin/exenatide. After 1 and 4 months in exenatide and in dapagliflozin/exenatide, insulin secretion remained higher (P < 0.01 vs. both) than dapagliflozin. BCF index in the acute study was 0.40 ± 0.04 in placebo, 62% higher (P < 0.05) in dapagliflozin (0.65 ± 0.10), threefold higher in exenatide (1.17 ±…
How strong is the evidence?
Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 3 of 5 (Moderate · trial / cohort / secondary analysis). Trials without a large randomized design, cohorts and secondary analyses give moderate evidence. Reported size: 25 participants or records.
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