HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) All Versions of this Article: clinchem.2004.037556v1 50/12/2316    most recent Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (10) Citing Articles via Google Scholar Google Scholar Articles by Brehm, A. Articles by Roden, M. Search for Related Content PubMed PubMed Citation Articles by Brehm, A. Articles by Roden, M. Related Collections Lipids, Lipoproteins, and Cardiovascular Risk Factors Endocrinology and Metabolism

Relationship between Serum Lipoprotein Ratios and Insulin Resistance in Obesity

¹ Division of Endocrinology and Metabolism, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria.
² Metabolic Unit, Institute of Biomedical Engineering (ISIB-CNR), Padova, Italy.
³ First Medical Department, Hanusch Hospital, Vienna, Austria.

^aAddress correspondence to this author at: First Medical Department, Hanusch Hospital, Heinrich Collin Strasse 30, A-1140 Vienna, Austria. Fax 43-1-91021-85019; e-mail michael.roden{at}meduniwien.ac.at.

Background: The fasting serum lipid profile [triglycerides (TGs), total cholesterol (TC), and LDL- and HDL-cholesterol (LDL-C and HDL-C)] is used to calculate lipid ratios (TC/HDL-C, LDL-C/HDL-C, TG/HDL-C) that allow identification of individuals at increased risk for cardiovascular disease. Because these individuals are also frequently insulin resistant, this study analyzed the relationships between lipid ratios and insulin sensitivity.

Methods: In 132 obese [mean (SE) body mass index, 37.5 (0.6) kg/m²] outpatients without known diabetes mellitus, fasting serum lipid profiles and 75-g oral glucose tolerance tests were performed. Insulin sensitivity was assessed from surrogate estimates for fasting (QUICKI) and dynamic (OGIS) conditions.

Results: After exclusion of other endocrine diseases (n = 35), the remaining patients were classified as glucose tolerant (n = 56), glucose intolerant (n = 22), or as having type 2 diabetes (n = 19). QUICKI and OGIS indicated severe insulin resistance in all individuals with type 2 diabetes and impaired glucose tolerance compared with glucose-tolerant individuals: QUICKI, glucose tolerant, 0.302 (0.002); glucose intolerant, 0.290 (0.002); type 2 diabetes, 0.281 (0.005); P <0.001; OGIS (mL · m^–2 · min^–1), glucose tolerant, 343 (7), glucose intolerant, 293 (9); type 2 diabetes, 256 (12); P <0.001. Serum TG (P <0.005) and TG/HDL-C ratios (P <0.05) were increased in individuals with impaired glucose tolerance. TG/HDL-C ratios negatively correlated with QUICKI (r = –0.370; P < 0.001) and OGIS (r = –0.333; P < 0.005) in nondiabetic individuals (glucose tolerant plus glucose intolerant), but not in patients with type 2 diabetes (not significant).

Conclusions: This study demonstrates that the TG/HDL-C ratio positively correlates with insulin resistance in severely obese nondiabetic individuals.

The following articles in journals at HighWire Press have cited this article:

				R. T. Zamanian, G. Hansmann, S. Snook, D. Lilienfeld, K. M. Rappaport, G. M. Reaven, M. Rabinovitch, and R. L. Doyle Insulin resistance in pulmonary arterial hypertension Eur. Respir. J., February 1, 2009; 33(2): 318 - 324. [Abstract] [Full Text] [PDF]

				C. L. Ronchi, V. Varca, P. Beck-Peccoz, E. Orsi, F. Donadio, A. Baccarelli, C. Giavoli, E. Ferrante, A. Lania, A. Spada, et al. Comparison between Six-Year Therapy with Long-Acting Somatostatin Analogs and Successful Surgery in Acromegaly: Effects on Cardiovascular Risk Factors J. Clin. Endocrinol. Metab., January 1, 2006; 91(1): 121 - 128. [Abstract] [Full Text] [PDF]