Abstract
The burden of diabetes is expected to rise from 415 million individuals in 2015 to
642 million individuals by 2040. Most individuals pass through a phase of prediabetes
before developing full-blown diabetes. Insulin resistance, impaired incretin action,
and insulin hypersecretion are central to the pathophysiology of prediabetes. Individuals
older than 40 years of age and other high-risk individuals should be screened for
diabetes with fasting plasma glucose and/or hemoglobin A1c. For those diagnosed with
prediabetes, the goal of treatment should be restoring euglycemia, because there are
data showing that restoring normoglycemia during prediabetes and early diabetes can
produce lasting remission. The preferred approach for this is intensive lifestyle
intervention, which besides reducing progression to diabetes, has also been shown
to reduce all-cause mortality in a long-term follow-up study. The best evidence for
a pharmacological approach is with metformin. Other drugs that have shown efficacy
include thiazolidinediones, alpha-glucosidase inhibitors, orlistat, basal insulin,
and valsartan. However, except for metformin, none of these drugs are currently recommended
for this purpose. Newer agents such as glucagon-like peptide-1 agonists and dipeptidyl
peptidase 4 (DPP-4) inhibitors also have considerable promise in this area. Bariatric
surgery can be offered to patients with metabolic syndrome and body mass index of
30-35.
Résumé
On s’attend à ce que le fardeau du diabète passe de 415 millions de personnes en 2015
à 642 millions de personnes en 2040. La plupart des individus traversent une phase
de prédiabète avant de développer un véritable diabète. L’insulinorésistance, la dégradation
de l’activité des incrétines et l’hypersécrétion d’insuline sont au centre de la physiopathologie
du prédiabète. Les personnes de plus de 40 ans et les autres personnes exposées à
un risque élevé devraient subir un dépistage du diabète au moyen de la glycémie plasmatique
à jeun ou de l’hémoglobine glyquée (A1c), ou les deux. Chez les personnes ayant un
diagnostic de prédiabète, l’objectif du traitement devrait être le rétablissement
de l’euglycémie, puisque des données montrent que le rétablissement de la normoglycémie
au cours du prédiabète et du diabète précoce peut entraîner une rémission durable.
L’approche privilégiée pour atteindre cet objectif de traitement demeure l’intervention
intensive sur le mode de vie qui, en plus de ralentir la progression du diabète, s’est
avérée efficace pour réduire la mortalité toutes causes confondues lors d’une étude
de suivi à long terme. Les meilleures données probantes d’approche pharmacologique
montrent l’efficacité de la metformine. Parmi les autres médicaments qui ont démontré
leur efficacité, notons : les thiazolidinediones, les inhibiteurs des alpha-glucosidases,
l’orlistat, l’insuline basale et le valsartan. Toutefois, à l’exception de la metformine,
aucun de ces médicaments n’est actuellement recommandé à cette fin. Des agents plus
récents tels que les agonistes des récepteurs GLP-1 (glucagon-like peptide-1) et les inhibiteurs de la DPP-4 (dipeptidyl peptidase 4) sont également très prometteurs dans ce domaine. La chirurgie bariatrique peut être
offerte aux patients atteints du syndrome métabolique dont l’indice de masse corporelle
se situe entre 30 et 35.
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Article info
Publication history
Published online: January 15, 2018
Accepted:
December 10,
2017
Received:
October 31,
2017
Footnotes
See page 621 for disclosure information.
Identification
Copyright
© 2018 Canadian Cardiovascular Society. Published by Elsevier Inc. All rights reserved.