sitagliptin-phosphate and Hypertriglyceridemia

Dipeptidyl peptidase-4 (DPP-4) inhibitors have been demonstrated to improve glycemic control, in particular postprandial hyperglycemic control, in patients with type 2 diabetes. Teneligliptin is a novel chemotype prolylthiazolidine-based DPP-4 inhibitor. The present study aimed to characterize the pharmacological profiles of teneligliptin in vitro and in vivo. Teneligliptin competitively inhibited human plasma, rat plasma, and human recombinant DPP-4 in vitro, with IC(50) values of approximately 1 nmol/l. Oral administration of teneligliptin in Wistar rats resulted in the inhibition of plasma DPP-4 with an ED(50) of 0.41 mg/kg. Plasma DPP-4 inhibition was sustained even at 24h after administration of teneligliptin. An oral carbohydrate-loading test in Zucker fatty rats showed that teneligliptin at ≥ 0.1mg/kg increased the maximum increase in plasma glucagon-like peptide-1 and insulin levels, and reduced glucose excursions. This effect was observed over 12h after a dose of 1mg/kg. An oral fat-loading test in Zucker fatty rats also showed that teneligliptin at 1mg/kg reduced triglyceride and free fatty acid excursions. In Zucker fatty rats, repeated administration of teneligliptin for two weeks reduced glucose excursions in the oral carbohydrate-loading test and decreased the plasma levels of triglycerides and free fatty acids under non-fasting conditions. The present studies indicate that teneligliptin is a potent, competitive, and long-lasting DPP-4 inhibitor that improves postprandial hyperglycemia and dyslipidemia by both single and repeated administrations.

Topics: Adamantane; Animals; Blood Glucose; Diabetes Mellitus, Type 2; Dipeptidyl Peptidase 4; Dipeptidyl-Peptidase IV Inhibitors; Glucagon-Like Peptide 1; Hyperglycemia; Hypertriglyceridemia; Hypoglycemic Agents; Hypolipidemic Agents; Insulin; Male; Nitriles; Pyrazines; Pyrazoles; Pyrrolidines; Rats; Rats, Wistar; Rats, Zucker; Sitagliptin Phosphate; Thiazolidines; Triazoles; Vildagliptin