New Trends in the Development of Oral Antidiabetic Drugs
A large number of oral antidiabetic agents are available today. This article provides a short review of the pharmacology and some clinical aspects of various oral antidiabetic drugs. It focuses mainly on the newest developing drugs (therapy of the near future) and on the most commonly used older groups for the common approach of every- day practice (sulphonylureas). The primary goal of this review is to compare the electrophysiological effects of glibenclamide in isolated normal and streptozotocin induced diabetic rats and alloxan induced rabbits ventricular preparations, while on the other hand to differentiate the hypoglycaemic sulphonylureas (0.1-1000 mol / kg) according to their cardiovascular activity in healthy and diabetic animals. In vitro (1-100 mol / l) as well as chronically treated (5 mg / kg for 10 weeks) glibenclamide prolonged the action potential duration in normal but failed to affect it in diabetic ventricular preparations. Our results suggest that the sensitivity to glibenclamide of KATP channels in diabetic ventricular fibers is drastically decreased. The effects of different sulphonylureas (tolbutamide, glibenclamide, gliclazide, glimepiride) on ventricular ectopic beats as well as the duration of ventricular fibrillation induced by 10 min ischemia / 50 min reperfusion in healthy and diabetic rats were compared. Tolbutamide and gliclazide dose-dependently enhanced both parameters both in healthy and diabetic groups. Glibenclamide in healthy rats increased, while in diabetic rats it decreased the arrhythmogenicity. Glimepiride depressed the arrhythmogenicity in both healthy and diabetic animals. Glimepiride proved to dose-dependently enhance the myocardial tissue flow in dog in contrast to glibenclamide. These results confirm that glimepiride has less cardiovascular actions than other sulphonylureas. From the newest oral antidiabetics this review tries to emphasize the most important basic pharmacological properties, mechanism of action, therapeutic use.
No Supplementary Data
Document Type: Review Article
Publication date: 2002-01-01
More about this publication?
- Current Medicinal Chemistry covers all the latest and outstanding developments in medicinal chemistry and rational drug design. Each issue contains a series of timely in-depth reviews written by leaders in the field covering a range of the current topics in medicinal chemistry. Current Medicinal Chemistry is an essential journal for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important developments.