PMID- 24769273 OWN - NLM STAT- MEDLINE DCOM- 20150413 LR - 20140812 IS - 1873-2933 (Electronic) IS - 0009-9120 (Linking) VI - 47 IP - 12 DP - 2014 Aug TI - Serum paraoxonase-1 activity is more closely related to HDL particle concentration and large HDL particles than to HDL cholesterol in Type 2 diabetic and non-diabetic subjects. PG - 1022-7 LID - S0009-9120(14)00182-9 [pii] LID - 10.1016/j.clinbiochem.2014.04.013 [doi] AB - OBJECTIVES: We determined relationships of the anti-oxidative enzyme, paraoxonase-1 (PON-1), with high density lipoprotein (HDL) subfractions, and tested whether these relationships are stronger than those with HDL cholesterol and apolipoprotein A-I (apoA-I) in subjects with and without type 2 diabetes mellitus (T2DM). DESIGN AND METHODS: Serum PON-1 (arylesterase activity) and HDL subfractions (nuclear magnetic resonance spectroscopy) were determined in 67 T2DM patients and in 56 non-diabetic subjects. RESULTS: PON-1 activity, HDL cholesterol and apoA-I were decreased in T2DM (all p<0.05). The HDL particle concentration was unaltered, but large HDL particles, medium HDL particles and HDL particle size were decreased, whereas small HDL particles were increased in T2DM (all p<0.05). PON-1 was more closely related to HDL cholesterol than to apoA-I (p=0.001). In turn, the positive relationship of PON-1 with the HDL particle concentration and with large HDL particles was stronger than that with HDL cholesterol (both p<0.01). The inverse relationship of PON-1 with T2DM was only modestly attenuated by HDL cholesterol or HDL particle characteristics. CONCLUSIONS: PON-1 activity is more closely related to the HDL particle concentration or large HDL particles than to HDL cholesterol. Impaired PON-1 activity in T2DM is not to a considerable extent explained by altered HDL subfraction levels. CI - Copyright (c) 2014 The Canadian Society of Clinical Chemists. Published by Elsevier Inc. All rights reserved. FAU - Dullaart, Robin P F AU - Dullaart RP AD - Department of Endocrinology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands. Electronic address: r.p.f.dullaart@umcg.nl. FAU - Otvos, James D AU - Otvos JD AD - LipoScience Inc., Raleigh, NC, USA. Electronic address: jotvos@liposcience.com. FAU - James, Richard W AU - James RW AD - Division of Endocrinology, Diabetology, Hypertension and Nutrition, University Hospital Geneva, Switzerland. Electronic address: Richard.James@hcuge.ch. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140421 PL - United States TA - Clin Biochem JT - Clinical biochemistry JID - 0133660 RN - 0 (Lipoproteins, HDL) RN - EC 3.1.8.1 (Aryldialkylphosphatase) RN - EC 3.1.8.1 (PON1 protein, human) SB - IM MH - Aged MH - Aryldialkylphosphatase/*blood MH - Case-Control Studies MH - Diabetes Mellitus, Type 2/*blood/enzymology MH - Female MH - Humans MH - Lipoproteins, HDL/*blood MH - Magnetic Resonance Spectroscopy MH - Male MH - Middle Aged OTO - NOTNLM OT - High density lipoprotein subfractions OT - High density lipoproteins OT - Paraoxonase-1 activity OT - Type 2 diabetes mellitus EDAT- 2014/04/29 06:00 MHDA- 2015/04/14 06:00 CRDT- 2014/04/29 06:00 PHST- 2014/02/12 00:00 [received] PHST- 2014/03/19 00:00 [revised] PHST- 2014/04/11 00:00 [accepted] PHST- 2014/04/29 06:00 [entrez] PHST- 2014/04/29 06:00 [pubmed] PHST- 2015/04/14 06:00 [medline] AID - S0009-9120(14)00182-9 [pii] AID - 10.1016/j.clinbiochem.2014.04.013 [doi] PST - ppublish SO - Clin Biochem. 2014 Aug;47(12):1022-7. doi: 10.1016/j.clinbiochem.2014.04.013. Epub 2014 Apr 21.