OBJECTIVE: Inflammation plays an important role in atherosclerosis. Elevated C-reactive protein (CRP) levels are associated with a greater risk of cardiovascular disease. Our goal was to study CRP metabolism, and to determine its relationship with lipoprotein metabolism using stable isotope methodology. MATERIAL/ METHODS: Eight subjects with combined hyperlipidemia underwent a 15-h primed-constant infusion with deuterated leucine. CRP was purified from the plasma density fraction greater than 1.21g/ml by affinity chromatography. Lipoprotein fractions were separated by sequential ultracentrifugation. Isotope enrichment was determined by gas chromatography/mass spectrometry. RESULTS: The subjects had mean LDL-C levels of 147.5mg/dl and mean CRP levels of 3.4mg/l. The mean CRP production rate (PR) was 0.050±0.012mg/kg/day and the mean CRP fractional catabolic rate (FCR) was 0.343±0.056 pools/day (residence time 2.92days). CRP pool size (PS) was significantly related to production (r=0.93; p<0.001), but not FCR. CRP PS was also related to body mass index (r=0.79; p=0.02). There was a significant association between CRP FCR and TRL apoB-100 FCR (r=0.74, p=0.04), as well as between CRP PS and TRL apoB-48 FCR (r=-0.90, p=0.002), indicating linkage between CRP and TRL metabolism. CONCLUSION: The main determinant of plasma CRP levels was CRP production rate. Moreover a significant linkage between CRP metabolism and both TRL apoB-100 and apoB-48 catabolism was noted.
OBJECTIVE:Inflammation plays an important role in atherosclerosis. Elevated C-reactive protein (CRP) levels are associated with a greater risk of cardiovascular disease. Our goal was to study CRP metabolism, and to determine its relationship with lipoprotein metabolism using stable isotope methodology. MATERIAL/ METHODS: Eight subjects with combined hyperlipidemia underwent a 15-h primed-constant infusion with deuterated leucine. CRP was purified from the plasma density fraction greater than 1.21g/ml by affinity chromatography. Lipoprotein fractions were separated by sequential ultracentrifugation. Isotope enrichment was determined by gas chromatography/mass spectrometry. RESULTS: The subjects had mean LDL-C levels of 147.5mg/dl and mean CRP levels of 3.4mg/l. The mean CRP production rate (PR) was 0.050±0.012mg/kg/day and the mean CRP fractional catabolic rate (FCR) was 0.343±0.056 pools/day (residence time 2.92days). CRP pool size (PS) was significantly related to production (r=0.93; p<0.001), but not FCR. CRP PS was also related to body mass index (r=0.79; p=0.02). There was a significant association between CRP FCR and TRL apoB-100 FCR (r=0.74, p=0.04), as well as between CRP PS and TRL apoB-48 FCR (r=-0.90, p=0.002), indicating linkage between CRP and TRL metabolism. CONCLUSION: The main determinant of plasma CRP levels was CRP production rate. Moreover a significant linkage between CRP metabolism and both TRL apoB-100 and apoB-48 catabolism was noted.
Authors: Thomas A Pearson; George A Mensah; R Wayne Alexander; Jeffrey L Anderson; Richard O Cannon; Michael Criqui; Yazid Y Fadl; Stephen P Fortmann; Yuling Hong; Gary L Myers; Nader Rifai; Sidney C Smith; Kathryn Taubert; Russell P Tracy; Frank Vinicor Journal: Circulation Date: 2003-01-28 Impact factor: 29.690
Authors: Marcelo C Batista; Francine K Welty; Margaret R Diffenderfer; Mark J Sarnak; Ernst J Schaefer; Stefania Lamon-Fava; Bela F Asztalos; Gregory G Dolnikowski; Margaret E Brousseau; Julian B Marsh Journal: Metabolism Date: 2004-10 Impact factor: 8.694
Authors: Michael E Lassman; Thomas McAvoy; Anita Y H Lee; Derek Chappell; Oitak Wong; Haihong Zhou; Gissette Reyes-Soffer; Henry N Ginsberg; John S Millar; Daniel J Rader; David E Gutstein; Omar Laterza Journal: Clin Chem Date: 2014-04-21 Impact factor: 8.327
Authors: Nuntakorn Thongtang; Margaret R Diffenderfer; Esther M M Ooi; Bela F Asztalos; Gregory G Dolnikowski; Stefania Lamon-Fava; Ernst J Schaefer Journal: Atherosclerosis Date: 2012-11-23 Impact factor: 5.162