Effect of linagliptin on vascular function: A randomized, placebo-controlled study

Journal article


Baltzis, Dimitrios, Dushay, Jody R., Loader, Jordan, Wu, Jim, Greenman, Robert L., Roustit, Matthieu and Veves, Aristidis. (2016). Effect of linagliptin on vascular function: A randomized, placebo-controlled study. The Journal of Clinical Endocrinology and Metabolism. 101(11), pp. 4205 - 4213. https://doi.org/10.1210/jc.2016-2655
AuthorsBaltzis, Dimitrios, Dushay, Jody R., Loader, Jordan, Wu, Jim, Greenman, Robert L., Roustit, Matthieu and Veves, Aristidis
Abstract

Context: The dipeptidyl peptidase-4 inhibitor, linagliptin, possesses pleiotropic vasodilatory, antioxidant, and anti-inflammatory properties in animals, independent of its glucose-lowering properties. Although large, randomized clinical trials are being conducted to better evaluate the efficacy and safety of linagliptin on cardiovascular outcomes, little is known about its effects on vascular function in humans. Objective: This study sought to evaluate the effect of linagliptin on surrogates of vascular and mitochondrial function. Design and Setting: This was a randomized, double-blind, placebo-controlled trial at a tertiary care center with a large type 2 diabetes referral base. Patients and Intervention: Forty participants with type 2 diabetes were included in a 12-wk treatment of either linagliptin 5mg/d or placebo. Main Outcome Measures: Micro- and macrovascular functions were assessed using laser Doppler coupled with iontophoresis and with brachial flow-mediated dilation, respectively. Mitochondrial function was assessed by phosphorus-31 metabolites changes in the calf muscle measured by magnetic resonance spectroscopy. Circulating endothelial progenitor cells, as well as inflammatory cytokines, growth factors, and biomarkers of endothelial function were also quantified. Results: Linagliptin was associated with an increase in axon reflex-dependent vasodilation, a marker of neurovascular function (P = .05). A trend indicating increased endothelium-dependent microvascular reactivity was observed (P= .07). These were associated with decreases in concentrations of IFNγ (P < .05), IL-6 (P = .03), IL-12 (P < .03), and MIP-1 (P < .04) following linagliptin treatment when compared with placebo. Conclusions: This study demonstrates that linagliptin tends to improve endothelial and neurovascular microvascular function and is associated with decreased markers of inflammation in patients with type 2 diabetes. There was no significant effect of linagliptin on mitochondrial function, macrovascular function, or endothelial progenitor cells.

Year2016
JournalThe Journal of Clinical Endocrinology and Metabolism
Journal citation101 (11), pp. 4205 - 4213
PublisherEndocrine Society
ISSN0021-972X
Digital Object Identifier (DOI)https://doi.org/10.1210/jc.2016-2655
Scopus EID2-s2.0-84994851691
Page range4205 - 4213
Research GroupMary MacKillop Institute for Health Research
Publisher's version
File Access Level
Controlled
Place of publicationUnited States of America
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