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Oral antidiabetic agents: anti-atherosclerotic properties beyond glucose lowering?
1Outpatient Clinic of Obesity, Diabetes and Metabolism at the Second Department of Internal Medicine, Democritus University of Thrace, Greece. papanasnikos@yahoo.gr
Abstract:
Type 2 diabetes is associated with substantially increased cardiovascular mortality. The need to reduce the progression of atherosclerosis alongside lowering blood glucose levels is now well established. Ideally, pharmaceutical treatment should address both of these needs. This review summarises current evidence of the anti-atherosclerotic effects exerted by oral antidiabetic agents. Metformin has so far consistently succeeded in reducing cardiovascular morbidity and mortality and exerting beneficial effects on lipids. Of the new agents, thiazolidinediones (rosiglitazone and pioglitazone) have been most widely studied. They have a favourable effect on fat distribution and improve lipid profile, fibrinolysis and endothelial function. Moreover, they reduce blood pressure and inflammatory markers, attenuate the progression of carotid intima-media thickness (CIMT) and may reduce the rates of coronary restenosis following percutaneous coronary intervention. Glinides (repaglinide and nateglinide) have also been documented to improve endothelial function and lipid profile, to reduce oxidative stress, platelet activity and inflammatory markers, and to diminish the progression of CIMT. Finally, acarbose may significantly reduce new cases of hypertension and cardiovascular events, as well as diminishing the progression of CIMT in patients with impaired glucose tolerance. Interestingly, some of these beneficial effects appear to be independent of the antidiabetic action. Thus, oral antidiabetic agents are now emerging as useful tools for the attenuation of the atherosclerotic activity and for the protection of the vasculature in patients with type 2 diabetes.
Insights
Oral antidiabetic agents offer cardiovascular protection by reducing atherosclerosis progression in type 2 diabetes patients. Some agents provide benefits beyond glucose lowering, aiding vascular health.
Area of Science:
- Endocrinology
- Cardiology
- Pharmacology
Background:
- Type 2 diabetes significantly elevates cardiovascular mortality risk.
- Simultaneous management of blood glucose and atherosclerosis progression is crucial.
- Pharmaceuticals ideally should target both diabetes and cardiovascular complications.
Purpose of the Study:
- To review the anti-atherosclerotic effects of oral antidiabetic agents.
- To evaluate their role in protecting vasculature in type 2 diabetes.
Main Methods:
- Systematic review of current evidence on oral antidiabetic agents.
- Analysis of studies focusing on cardiovascular outcomes and atherosclerosis markers.
Main Results:
- Metformin consistently reduces cardiovascular morbidity/mortality and improves lipids.
- Thiazolidinediones improve fat distribution, lipids, fibrinolysis, endothelial function, blood pressure, and inflammatory markers, attenuating carotid intima-media thickness (CIMT) progression.
- Glinides and acarbose also show benefits in endothelial function, lipid profiles, oxidative stress, inflammation, and CIMT progression, with some effects independent of glucose lowering.
Conclusions:
- Oral antidiabetic agents demonstrate significant anti-atherosclerotic properties.
- These agents are valuable for mitigating vascular damage and protecting the vasculature in type 2 diabetes.
- Some beneficial cardiovascular effects may be independent of their glucose-lowering action.
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