Diabetes Care 28:1547-1554, 2005
© 2005 by the American Diabetes Association, Inc.
Clinical Care/Education/Nutrition Original Article |
A Comparison of Lipid and Glycemic Effects of Pioglitazone and Rosiglitazone in Patients With Type 2 Diabetes and Dyslipidemia
Ronald B. Goldberg, MD1,
David M. Kendall, MD2,
Mark A. Deeg, MD, PHD3,
John B. Buse, MD, PHD4,
Anthony J. Zagar, MS5,
Jane A. Pinaire, PHD5,
Meng H. Tan, MD5,
Mehmood A. Khan, MD6,
Alfonso T. Perez, MD7,
Scott J. Jacober, DO5 for the GLAI Study Investigators
1 Division of Endocrinology, Metabolism, and Diabetes, University of Miami School of Medicine, Miami, Florida
2 International Diabetes Center, Park Nicollet Institute, Minneapolis, Minnesota
3 Division of Endocrinology and Metabolism, Department of Veterans Affairs and the Indiana University School of Medicine, Indianapolis, Indiana
4 Divisions of Endocrinology and of General Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina
5 Lilly Research Laboratories, Eli Lilly, Indianapolis, Indiana
6 Takeda Pharmaceuticals North America, Lincolnshire, Illinois
7 Takeda Global Research and Development Center, Lincolnshire, Illinois
Address correspondence and reprint requests to Scott J. Jacober, DO, Lilly Research Laboratories, A Division of Eli Lilly, Lilly Corporate Center, DC 5116, Indianapolis, IN 46285. E-mail: sjacober{at}lilly.com
OBJECTIVEPublished reports suggest that pioglitazone and rosiglitazone have different effects on lipids in patients with type 2 diabetes. However, these previous studies were either retrospective chart reviews or clinical trials not rigorously controlled for concomitant glucose- and lipid-lowering therapies. This study examines the lipid and glycemic effects of pioglitazone and rosiglitazone.
RESEARCH DESIGN AND METHODSWe enrolled subjects with a diagnosis of type 2 diabetes (treated with diet alone or oral monotherapy) and dyslipidemia (not treated with any lipid-lowering agents). After a 4-week placebo washout period, subjects randomly assigned to the pioglitazone arm (n = 400) were treated with 30 mg once daily for 12 weeks followed by 45 mg once daily for an additional 12 weeks, whereas subjects randomly assigned to rosiglitazone (n = 402) were treated with 4 mg once daily followed by 4 mg twice daily for the same intervals.
RESULTSTriglyceride levels were reduced by 51.9 ± 7.8 mg/dl with pioglitazone, but were increased by 13.1 ± 7.8 mg/dl with rosiglitazone (P < 0.001 between treatments). Additionally, the increase in HDL cholesterol was greater (5.2 ± 0.5 vs. 2.4 ± 0.5 mg/dl; P < 0.001) and the increase in LDL cholesterol was less (12.3 ± 1.6 vs. 21.3 ± 1.6 mg/dl; P < 0.001) for pioglitazone compared with rosiglitazone, respectively. LDL particle concentration was reduced with pioglitazone and increased with rosiglitazone (P < 0.001). LDL particle size increased more with pioglitazone (P = 0.005).
CONCLUSIONSPioglitazone and rosiglitazone have significantly different effects on plasma lipids independent of glycemic control or concomitant lipid-lowering or other antihyperglycemic therapy. Pioglitazone compared with rosiglitazone is associated with significant improvements in triglycerides, HDL cholesterol, LDL particle concentration, and LDL particle size.
Abbreviations: CHD, coronary heart disease CVD, cardiovascular disease LOCF, last observation carried forward PAI-1, plasminogen activator inhibitor-1

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