Comparison of a Homogeneous Assay With a Precipitation Method for the Measurement of HDL Cholesterol in Diabetic Patients

Comparison of a Homogeneous Assay With a Precipitation Method for the Measurement of HDL Cholesterol in Diabetic Patients Tonny Jensen , MD 1 , Quan Truong 1 , Merete Frandsen 1 , Bo Dinesen , MD 1 and Steen Stender , MD 2 1 Steno Diabetes Center, Gentofte, Denmark 2 Department of Clinical Chemistry...

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Veröffentlicht in:Diabetes care 2002-11, Vol.25 (11), p.1914-1918
Hauptverfasser: JENSEN, Tonny, QUAN TRUONG, FRANDSEN, Merete, DINESEN, Bo, STENDER, Steen
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container_end_page 1918
container_issue 11
container_start_page 1914
container_title Diabetes care
container_volume 25
creator JENSEN, Tonny
QUAN TRUONG
FRANDSEN, Merete
DINESEN, Bo
STENDER, Steen
description Comparison of a Homogeneous Assay With a Precipitation Method for the Measurement of HDL Cholesterol in Diabetic Patients Tonny Jensen , MD 1 , Quan Truong 1 , Merete Frandsen 1 , Bo Dinesen , MD 1 and Steen Stender , MD 2 1 Steno Diabetes Center, Gentofte, Denmark 2 Department of Clinical Chemistry, KAS Gentofte, Hellerup, Denmark Abstract OBJECTIVE —To compare direct-measured HDL cholesterol with HDL cholesterol measured by a precipitation method. RESEARCH DESIGN AND METHODS —We compared a homogeneous assay for direct HDL cholesterol analysis with the phosphotungstic acid magnesium chloride precipitation method in 55 type 1 diabetic patients, 70 type 2 diabetic patients, and 82 nondiabetic normal control subjects with plasma triglyceride levels 1.063; these apo B-containing lipoproteins are suggested to be coprecipitated with the phosphotungstic acid method. We also measured LDL cholesterol directly by a LDL cholesterol plus method and found no significant differences between this method and LDL cholesterol calculated from Friedewald’s formula. CONCLUSIONS —Direct homogeneous assay for HDL cholesterol determination in diabetic patients seems not to exhibit a negative bias, in contrast to the precipitation method, when compared with the ultracentrifugation method. In addition, the direct assay saves time and is not influenced by type of diabetes or degree of metabolic control. apo, apolipoprotein Footnotes Address correspondence and reprint requests to Tonny Jensen, MD, Clinic of Endocrinology, Hvidovre Hospital, 30 Kettegaard Alle, DK-2650 Hvidovre, Denmark. E-mail: tonny.jensen.tj{at}hh.hosp.dk . Received for publication 13 February 2001 and accepted in revised form 2 August 2002. A table elsewhere in this issue shows conventional
doi_str_mv 10.2337/diacare.25.11.1914
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RESEARCH DESIGN AND METHODS —We compared a homogeneous assay for direct HDL cholesterol analysis with the phosphotungstic acid magnesium chloride precipitation method in 55 type 1 diabetic patients, 70 type 2 diabetic patients, and 82 nondiabetic normal control subjects with plasma triglyceride levels &lt;4.6 mmol/l. The cholesterol content of HDL determined by the direct assay was overall 0.1 mmol/l higher in all three groups than HDL cholesterol measured after precipitation, but the two methods were closely correlated ( r 2 = 0.98, P &lt; 0.001). RESULTS —HbA 1c , blood glucose, serum albumin, serum bilirubin, or triglyceride did not influence the differences of the two HDL cholesterol measurements. Because we have previously shown HDL cholesterol isolated by phosphotungstic acid precipitation to be lower than that by ultracentrifugation, the positive bias found in this study was expected. It seems that the direct HDL cholesterol assay reacts with apolipoprotein (apo) B-containing lipoproteins in the fraction with a density of &gt;1.063; these apo B-containing lipoproteins are suggested to be coprecipitated with the phosphotungstic acid method. We also measured LDL cholesterol directly by a LDL cholesterol plus method and found no significant differences between this method and LDL cholesterol calculated from Friedewald’s formula. CONCLUSIONS —Direct homogeneous assay for HDL cholesterol determination in diabetic patients seems not to exhibit a negative bias, in contrast to the precipitation method, when compared with the ultracentrifugation method. In addition, the direct assay saves time and is not influenced by type of diabetes or degree of metabolic control. apo, apolipoprotein Footnotes Address correspondence and reprint requests to Tonny Jensen, MD, Clinic of Endocrinology, Hvidovre Hospital, 30 Kettegaard Alle, DK-2650 Hvidovre, Denmark. E-mail: tonny.jensen.tj{at}hh.hosp.dk . Received for publication 13 February 2001 and accepted in revised form 2 August 2002. A table elsewhere in this issue shows conventional and Système International (SI) units and conversion factors for many substances. DIABETES CARE</description><identifier>ISSN: 0149-5992</identifier><identifier>EISSN: 1935-5548</identifier><identifier>DOI: 10.2337/diacare.25.11.1914</identifier><identifier>PMID: 12401732</identifier><identifier>CODEN: DICAD2</identifier><language>eng</language><publisher>Alexandria, VA: American Diabetes Association</publisher><subject>Adult ; Aged ; Aged, 80 and over ; Biological and medical sciences ; Chemical Precipitation ; Cholesterol - blood ; Cholesterol, HDL ; Cholesterol, HDL - blood ; Cholesterol, LDL - blood ; Diabetes ; Diabetes Mellitus, Type 1 - blood ; Diabetes Mellitus, Type 2 - blood ; Diabetes. Impaired glucose tolerance ; Endocrine pancreas. Apud cells (diseases) ; Endocrinopathies ; Etiopathogenesis. Screening. Investigations. Target tissue resistance ; Glycated Hemoglobin A - analysis ; Humans ; Measurement ; Medical sciences ; Middle Aged ; Patient Selection ; Physiological aspects ; Reference Values ; Regression Analysis ; Reproducibility of Results ; Serum Albumin - analysis ; Triglycerides - blood</subject><ispartof>Diabetes care, 2002-11, Vol.25 (11), p.1914-1918</ispartof><rights>2003 INIST-CNRS</rights><rights>COPYRIGHT 2002 American Diabetes Association</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c484t-41ed0f141de8802d6e604ded42e8d756a0d5781ae566063d3a4cea6b1ca9b9fa3</citedby><cites>FETCH-LOGICAL-c484t-41ed0f141de8802d6e604ded42e8d756a0d5781ae566063d3a4cea6b1ca9b9fa3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=14361665$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/12401732$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>JENSEN, Tonny</creatorcontrib><creatorcontrib>QUAN TRUONG</creatorcontrib><creatorcontrib>FRANDSEN, Merete</creatorcontrib><creatorcontrib>DINESEN, Bo</creatorcontrib><creatorcontrib>STENDER, Steen</creatorcontrib><title>Comparison of a Homogeneous Assay With a Precipitation Method for the Measurement of HDL Cholesterol in Diabetic Patients</title><title>Diabetes care</title><addtitle>Diabetes Care</addtitle><description>Comparison of a Homogeneous Assay With a Precipitation Method for the Measurement of HDL Cholesterol in Diabetic Patients Tonny Jensen , MD 1 , Quan Truong 1 , Merete Frandsen 1 , Bo Dinesen , MD 1 and Steen Stender , MD 2 1 Steno Diabetes Center, Gentofte, Denmark 2 Department of Clinical Chemistry, KAS Gentofte, Hellerup, Denmark Abstract OBJECTIVE —To compare direct-measured HDL cholesterol with HDL cholesterol measured by a precipitation method. RESEARCH DESIGN AND METHODS —We compared a homogeneous assay for direct HDL cholesterol analysis with the phosphotungstic acid magnesium chloride precipitation method in 55 type 1 diabetic patients, 70 type 2 diabetic patients, and 82 nondiabetic normal control subjects with plasma triglyceride levels &lt;4.6 mmol/l. The cholesterol content of HDL determined by the direct assay was overall 0.1 mmol/l higher in all three groups than HDL cholesterol measured after precipitation, but the two methods were closely correlated ( r 2 = 0.98, P &lt; 0.001). RESULTS —HbA 1c , blood glucose, serum albumin, serum bilirubin, or triglyceride did not influence the differences of the two HDL cholesterol measurements. Because we have previously shown HDL cholesterol isolated by phosphotungstic acid precipitation to be lower than that by ultracentrifugation, the positive bias found in this study was expected. It seems that the direct HDL cholesterol assay reacts with apolipoprotein (apo) B-containing lipoproteins in the fraction with a density of &gt;1.063; these apo B-containing lipoproteins are suggested to be coprecipitated with the phosphotungstic acid method. We also measured LDL cholesterol directly by a LDL cholesterol plus method and found no significant differences between this method and LDL cholesterol calculated from Friedewald’s formula. CONCLUSIONS —Direct homogeneous assay for HDL cholesterol determination in diabetic patients seems not to exhibit a negative bias, in contrast to the precipitation method, when compared with the ultracentrifugation method. In addition, the direct assay saves time and is not influenced by type of diabetes or degree of metabolic control. apo, apolipoprotein Footnotes Address correspondence and reprint requests to Tonny Jensen, MD, Clinic of Endocrinology, Hvidovre Hospital, 30 Kettegaard Alle, DK-2650 Hvidovre, Denmark. E-mail: tonny.jensen.tj{at}hh.hosp.dk . Received for publication 13 February 2001 and accepted in revised form 2 August 2002. A table elsewhere in this issue shows conventional and Système International (SI) units and conversion factors for many substances. DIABETES CARE</description><subject>Adult</subject><subject>Aged</subject><subject>Aged, 80 and over</subject><subject>Biological and medical sciences</subject><subject>Chemical Precipitation</subject><subject>Cholesterol - blood</subject><subject>Cholesterol, HDL</subject><subject>Cholesterol, HDL - blood</subject><subject>Cholesterol, LDL - blood</subject><subject>Diabetes</subject><subject>Diabetes Mellitus, Type 1 - blood</subject><subject>Diabetes Mellitus, Type 2 - blood</subject><subject>Diabetes. Impaired glucose tolerance</subject><subject>Endocrine pancreas. Apud cells (diseases)</subject><subject>Endocrinopathies</subject><subject>Etiopathogenesis. Screening. Investigations. Target tissue resistance</subject><subject>Glycated Hemoglobin A - analysis</subject><subject>Humans</subject><subject>Measurement</subject><subject>Medical sciences</subject><subject>Middle Aged</subject><subject>Patient Selection</subject><subject>Physiological aspects</subject><subject>Reference Values</subject><subject>Regression Analysis</subject><subject>Reproducibility of Results</subject><subject>Serum Albumin - analysis</subject><subject>Triglycerides - blood</subject><issn>0149-5992</issn><issn>1935-5548</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNptkcGO0zAQhi0EYkvhBTggX9gLm2I7tpscqy7QlYrYA4hjNLUnjVESF9sV6tvjbiPtpfJhZM83_4znJ-Q9ZwtRlsvP1oGBgAuhFpwveM3lCzLjdakKpWT1kswYl3Wh6lrckDcx_mGMSVlVr8kNF5LxZSlm5LT2wwGCi36kvqVAN37wexzRHyNdxQgn-tulLiceAxp3cAmSy-x3TJ23tPWBpg7zFeIx4IBjOsts7rd03fkeY8Lge-pGeu9gh8kZ-pgFMhbfklct9BHfTXFOfn398nO9KbY_vj2sV9vCyEqmQnK0rOWSW6wqJqxGzaRFKwVWdqk0MKuWFQdUWjNd2hKkQdA7bqDe1S2Uc3J70T0E__eYJ2oGFw32PTx9slkKLbTO25iTuwu4hx4bN7Y-BTDnXQTo_Yity8-rWnIpBGcZL67g-VgcnLnGiwtvgo8xYNscghsgnBrOmrOfzeRnI1TDeXP2Mxd9mIY_7ga0zyWTgRn4OAEQDfRtgNG4-MzJUnOtVeY-XbjO7bt_LnexT4ZgvNb2Pwlgubs</recordid><startdate>20021101</startdate><enddate>20021101</enddate><creator>JENSEN, Tonny</creator><creator>QUAN TRUONG</creator><creator>FRANDSEN, Merete</creator><creator>DINESEN, Bo</creator><creator>STENDER, Steen</creator><general>American Diabetes Association</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20021101</creationdate><title>Comparison of a Homogeneous Assay With a Precipitation Method for the Measurement of HDL Cholesterol in Diabetic Patients</title><author>JENSEN, Tonny ; QUAN TRUONG ; FRANDSEN, Merete ; DINESEN, Bo ; STENDER, Steen</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c484t-41ed0f141de8802d6e604ded42e8d756a0d5781ae566063d3a4cea6b1ca9b9fa3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Adult</topic><topic>Aged</topic><topic>Aged, 80 and over</topic><topic>Biological and medical sciences</topic><topic>Chemical Precipitation</topic><topic>Cholesterol - blood</topic><topic>Cholesterol, HDL</topic><topic>Cholesterol, HDL - blood</topic><topic>Cholesterol, LDL - blood</topic><topic>Diabetes</topic><topic>Diabetes Mellitus, Type 1 - blood</topic><topic>Diabetes Mellitus, Type 2 - blood</topic><topic>Diabetes. 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RESEARCH DESIGN AND METHODS —We compared a homogeneous assay for direct HDL cholesterol analysis with the phosphotungstic acid magnesium chloride precipitation method in 55 type 1 diabetic patients, 70 type 2 diabetic patients, and 82 nondiabetic normal control subjects with plasma triglyceride levels &lt;4.6 mmol/l. The cholesterol content of HDL determined by the direct assay was overall 0.1 mmol/l higher in all three groups than HDL cholesterol measured after precipitation, but the two methods were closely correlated ( r 2 = 0.98, P &lt; 0.001). RESULTS —HbA 1c , blood glucose, serum albumin, serum bilirubin, or triglyceride did not influence the differences of the two HDL cholesterol measurements. Because we have previously shown HDL cholesterol isolated by phosphotungstic acid precipitation to be lower than that by ultracentrifugation, the positive bias found in this study was expected. It seems that the direct HDL cholesterol assay reacts with apolipoprotein (apo) B-containing lipoproteins in the fraction with a density of &gt;1.063; these apo B-containing lipoproteins are suggested to be coprecipitated with the phosphotungstic acid method. We also measured LDL cholesterol directly by a LDL cholesterol plus method and found no significant differences between this method and LDL cholesterol calculated from Friedewald’s formula. CONCLUSIONS —Direct homogeneous assay for HDL cholesterol determination in diabetic patients seems not to exhibit a negative bias, in contrast to the precipitation method, when compared with the ultracentrifugation method. In addition, the direct assay saves time and is not influenced by type of diabetes or degree of metabolic control. apo, apolipoprotein Footnotes Address correspondence and reprint requests to Tonny Jensen, MD, Clinic of Endocrinology, Hvidovre Hospital, 30 Kettegaard Alle, DK-2650 Hvidovre, Denmark. E-mail: tonny.jensen.tj{at}hh.hosp.dk . Received for publication 13 February 2001 and accepted in revised form 2 August 2002. A table elsewhere in this issue shows conventional and Système International (SI) units and conversion factors for many substances. DIABETES CARE</abstract><cop>Alexandria, VA</cop><pub>American Diabetes Association</pub><pmid>12401732</pmid><doi>10.2337/diacare.25.11.1914</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record>
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subjects Adult
Aged
Aged, 80 and over
Biological and medical sciences
Chemical Precipitation
Cholesterol - blood
Cholesterol, HDL
Cholesterol, HDL - blood
Cholesterol, LDL - blood
Diabetes
Diabetes Mellitus, Type 1 - blood
Diabetes Mellitus, Type 2 - blood
Diabetes. Impaired glucose tolerance
Endocrine pancreas. Apud cells (diseases)
Endocrinopathies
Etiopathogenesis. Screening. Investigations. Target tissue resistance
Glycated Hemoglobin A - analysis
Humans
Measurement
Medical sciences
Middle Aged
Patient Selection
Physiological aspects
Reference Values
Regression Analysis
Reproducibility of Results
Serum Albumin - analysis
Triglycerides - blood
title Comparison of a Homogeneous Assay With a Precipitation Method for the Measurement of HDL Cholesterol in Diabetic Patients
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