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Study shows liraglutide results in increased insulin sensitivity independent of weight loss

January 5, 2024
in Health
Study shows liraglutide results in increased insulin sensitivity independent of weight loss
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Study shows liraglutide results in increased insulin sensitivity independent of weight loss

Graphical abstract. Credit: Diabetes (2023). DOI: 10.2337/db23-0356

A recent study published in the journal Diabetes demonstrates that a glucagon-like peptide-1 receptor (GLP-1R) agonist, a member of a class of medication used to treat type 2 diabetes and obesity, can lead to a rapid improvement in insulin sensitivity.

Insulin sensitivity is how responsive cells are to insulin, an essential hormone that controls blood glucose levels. An increase in insulin sensitivity means insulin can more effectively lower blood glucose. Reduced insulin sensitivity or insulin resistance is a feature of type 2 diabetes. Thus, improved insulin sensitivity can reduce the risk of developing type 2 diabetes or improve its treatment.

GLP-1R agonists are medications that influence metabolism, such as decreasing blood sugar levels by promoting insulin secretion. Dipeptidyl peptidase 4 (DPP-4) inhibitors block the degradation of the body’s own endogenous GLP-1, as well as other peptide hormones such as glucose-dependent insulinotropic peptide (GIP).

“We know that GLP-1R agonists promote weight loss, but we were surprised to find that the GLP-1R agonist liraglutide also has rapid effects on insulin sensitivity, independent from weight loss,” said Mona Mashayekhi MD, Ph.D., assistant professor of Medicine in the Division of Diabetes, Endocrinology and Metabolism. “This effect requires activation of the GLP-1 receptor, but increasing the body’s own endogenous GLP-1 through the use of the DPP4 inhibitor sitagliptin does not achieve similar effects.”

“Our research suggests that liraglutide, and presumably other GLP-1R agonists, are having important metabolic effects in a way that’s different from increasing endogenous GLP-1 levels, even though they’re using the same receptor. Future research will focus on potential mechanisms of how GLP-1R agonists are improving insulin sensitivity independent of weight loss.”

Eighty-eight individuals with obesity and pre-diabetes were randomized for 14 weeks to receive the GLP-1R agonist liraglutide, the dipeptidyl peptidase 4 (DPP-4) inhibitor sitagliptin, or weight loss without drug using a low-calorie diet.

To further investigate the GLP-1R-dependent effects of the treatments, the GLP-1R antagonist exendin and a placebo were given in a two-by-two crossover study during mixed meal tests. Crossover studies allow the response of a subject to treatment A to be compared with the same subject’s response to treatment B.

Liraglutide was shown to rapidly improve insulin sensitivity as well as decrease blood glucose within two weeks of beginning treatment and before any weight loss.

“GLP-1R agonists are an exciting class of medications, given their strong glucose-lowering effects combined with tremendous weight-loss benefits, and they have transformed how we manage diabetes and obesity in the clinic,” Mashayekhi said. “Since the number of medications in this class is rapidly expanding, a deeper understanding of the mechanisms of benefit is crucial so we can design the right drugs for the desired effects in the right patients.”

The investigators’ prior research demonstrated that liraglutide, but not sitagliptin or diet, improves measures of heart disease and inflammation. This matches the clinical findings of reduced cardiovascular disease with GLP-1R agonist treatment.

Future studies will continue to explore both receptor- and weight loss-dependent effects of GLP-1R agonists in humans.

More information:
Mona Mashayekhi et al, Weight Loss–Independent Effect of Liraglutide on Insulin Sensitivity in Individuals With Obesity and Prediabetes, Diabetes (2023). DOI: 10.2337/db23-0356

Citation:
Study shows liraglutide results in increased insulin sensitivity independent of weight loss (2024, January 4)
retrieved 5 January 2024
from https://medicalxpress.com/news/2024-01-liraglutide-results-insulin-sensitivity-independent.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

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Copyright for syndicated content belongs to the linked Source : Medical Xpress – https://medicalxpress.com/news/2024-01-liraglutide-results-insulin-sensitivity-independent.html

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