Free cholesterol transfer to high-density lipoprotein (HDL) upon triglyceride lipolysis underlies the U-shape relationship between HDL-cholesterol and cardiovascular disease
Low concentrations of high-density lipoprotein cholesterol (HDL-C) represent a well-established cardiovascular risk factor. Paradoxically, extremely high HDL-C levels are equally associated with elevated cardiovascular risk, resulting in the U-shape relationship of HDL-C with cardiovascular disease....
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| Published in: | European journal of preventive cardiology Vol. 27; no. 15; p. 1606 |
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
| Format: | Journal Article |
| Language: | English |
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01.10.2020
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| ISSN: | 2047-4881, 2047-4881 |
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| Abstract | Low concentrations of high-density lipoprotein cholesterol (HDL-C) represent a well-established cardiovascular risk factor. Paradoxically, extremely high HDL-C levels are equally associated with elevated cardiovascular risk, resulting in the U-shape relationship of HDL-C with cardiovascular disease. Mechanisms underlying this association are presently unknown. We hypothesised that the capacity of high-density lipoprotein (HDL) to acquire free cholesterol upon triglyceride-rich lipoprotein (TGRL) lipolysis by lipoprotein lipase underlies the non-linear relationship between HDL-C and cardiovascular risk.
To assess our hypothesis, we developed a novel assay to evaluate the capacity of HDL to acquire free cholesterol (as fluorescent TopFluor® cholesterol) from TGRL upon in vitro lipolysis by lipoprotein lipase.
When the assay was applied to several populations markedly differing in plasma HDL-C levels, transfer of free cholesterol was significantly decreased in low HDL-C patients with acute myocardial infarction (-45%) and type 2 diabetes (-25%), and in subjects with extremely high HDL-C of >2.59 mmol/L (>100 mg/dL) (-20%) versus healthy normolipidaemic controls. When these data were combined and plotted against HDL-C concentrations, an inverse U-shape relationship was observed. Consistent with these findings, animal studies revealed that the capacity of HDL to acquire cholesterol upon lipolysis was reduced in low HDL-C apolipoprotein A-I knock-out mice and was negatively correlated with aortic accumulation of [
H]-cholesterol after oral gavage, attesting this functional characteristic as a negative metric of postprandial atherosclerosis.
Free cholesterol transfer to HDL upon TGRL lipolysis may underlie the U-shape relationship between HDL-C and cardiovascular disease, linking HDL-C to triglyceride metabolism and atherosclerosis. |
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| AbstractList | Low concentrations of high-density lipoprotein cholesterol (HDL-C) represent a well-established cardiovascular risk factor. Paradoxically, extremely high HDL-C levels are equally associated with elevated cardiovascular risk, resulting in the U-shape relationship of HDL-C with cardiovascular disease. Mechanisms underlying this association are presently unknown. We hypothesised that the capacity of high-density lipoprotein (HDL) to acquire free cholesterol upon triglyceride-rich lipoprotein (TGRL) lipolysis by lipoprotein lipase underlies the non-linear relationship between HDL-C and cardiovascular risk.BACKGROUNDLow concentrations of high-density lipoprotein cholesterol (HDL-C) represent a well-established cardiovascular risk factor. Paradoxically, extremely high HDL-C levels are equally associated with elevated cardiovascular risk, resulting in the U-shape relationship of HDL-C with cardiovascular disease. Mechanisms underlying this association are presently unknown. We hypothesised that the capacity of high-density lipoprotein (HDL) to acquire free cholesterol upon triglyceride-rich lipoprotein (TGRL) lipolysis by lipoprotein lipase underlies the non-linear relationship between HDL-C and cardiovascular risk.To assess our hypothesis, we developed a novel assay to evaluate the capacity of HDL to acquire free cholesterol (as fluorescent TopFluor® cholesterol) from TGRL upon in vitro lipolysis by lipoprotein lipase.METHODSTo assess our hypothesis, we developed a novel assay to evaluate the capacity of HDL to acquire free cholesterol (as fluorescent TopFluor® cholesterol) from TGRL upon in vitro lipolysis by lipoprotein lipase.When the assay was applied to several populations markedly differing in plasma HDL-C levels, transfer of free cholesterol was significantly decreased in low HDL-C patients with acute myocardial infarction (-45%) and type 2 diabetes (-25%), and in subjects with extremely high HDL-C of >2.59 mmol/L (>100 mg/dL) (-20%) versus healthy normolipidaemic controls. When these data were combined and plotted against HDL-C concentrations, an inverse U-shape relationship was observed. Consistent with these findings, animal studies revealed that the capacity of HDL to acquire cholesterol upon lipolysis was reduced in low HDL-C apolipoprotein A-I knock-out mice and was negatively correlated with aortic accumulation of [3H]-cholesterol after oral gavage, attesting this functional characteristic as a negative metric of postprandial atherosclerosis.RESULTSWhen the assay was applied to several populations markedly differing in plasma HDL-C levels, transfer of free cholesterol was significantly decreased in low HDL-C patients with acute myocardial infarction (-45%) and type 2 diabetes (-25%), and in subjects with extremely high HDL-C of >2.59 mmol/L (>100 mg/dL) (-20%) versus healthy normolipidaemic controls. When these data were combined and plotted against HDL-C concentrations, an inverse U-shape relationship was observed. Consistent with these findings, animal studies revealed that the capacity of HDL to acquire cholesterol upon lipolysis was reduced in low HDL-C apolipoprotein A-I knock-out mice and was negatively correlated with aortic accumulation of [3H]-cholesterol after oral gavage, attesting this functional characteristic as a negative metric of postprandial atherosclerosis.Free cholesterol transfer to HDL upon TGRL lipolysis may underlie the U-shape relationship between HDL-C and cardiovascular disease, linking HDL-C to triglyceride metabolism and atherosclerosis.CONCLUSIONSFree cholesterol transfer to HDL upon TGRL lipolysis may underlie the U-shape relationship between HDL-C and cardiovascular disease, linking HDL-C to triglyceride metabolism and atherosclerosis. Low concentrations of high-density lipoprotein cholesterol (HDL-C) represent a well-established cardiovascular risk factor. Paradoxically, extremely high HDL-C levels are equally associated with elevated cardiovascular risk, resulting in the U-shape relationship of HDL-C with cardiovascular disease. Mechanisms underlying this association are presently unknown. We hypothesised that the capacity of high-density lipoprotein (HDL) to acquire free cholesterol upon triglyceride-rich lipoprotein (TGRL) lipolysis by lipoprotein lipase underlies the non-linear relationship between HDL-C and cardiovascular risk. To assess our hypothesis, we developed a novel assay to evaluate the capacity of HDL to acquire free cholesterol (as fluorescent TopFluor® cholesterol) from TGRL upon in vitro lipolysis by lipoprotein lipase. When the assay was applied to several populations markedly differing in plasma HDL-C levels, transfer of free cholesterol was significantly decreased in low HDL-C patients with acute myocardial infarction (-45%) and type 2 diabetes (-25%), and in subjects with extremely high HDL-C of >2.59 mmol/L (>100 mg/dL) (-20%) versus healthy normolipidaemic controls. When these data were combined and plotted against HDL-C concentrations, an inverse U-shape relationship was observed. Consistent with these findings, animal studies revealed that the capacity of HDL to acquire cholesterol upon lipolysis was reduced in low HDL-C apolipoprotein A-I knock-out mice and was negatively correlated with aortic accumulation of [ H]-cholesterol after oral gavage, attesting this functional characteristic as a negative metric of postprandial atherosclerosis. Free cholesterol transfer to HDL upon TGRL lipolysis may underlie the U-shape relationship between HDL-C and cardiovascular disease, linking HDL-C to triglyceride metabolism and atherosclerosis. |
| Author | Darabi, Maryam Brites, Fernando Le Goff, Wilfried Lhomme, Marie Lesnik, Philippe Rached, Fabiana Carrie, Alain Canicio, Aurélie Bolbach, Gerard Tubeuf, Emilie Santos, Raul D Bruckert, Eric Feng, Ma Gautier, Emmanuel Guillas, Isabelle Huby, Thierry Kontush, Anatol Guerin, Maryse Lanfranchi-Lebreton, Sandrine Couvert, Philippe Ponnaiah, Maharajah Matheron, Lucrèce Frisdal, Eric Serrano, Jr, Carlos V Giral, Philippe |
| Author_xml | – sequence: 1 givenname: Ma surname: Feng fullname: Feng, Ma organization: Sorbonne University, Paris, France – sequence: 2 givenname: Maryam surname: Darabi fullname: Darabi, Maryam organization: Institute of Cardiometabolism and Nutrition (ICAN), Paris, France – sequence: 3 givenname: Emilie surname: Tubeuf fullname: Tubeuf, Emilie organization: Sorbonne University, Paris, France – sequence: 4 givenname: Aurélie surname: Canicio fullname: Canicio, Aurélie organization: Institute of Cardiometabolism and Nutrition (ICAN), Paris, France – sequence: 5 givenname: Marie surname: Lhomme fullname: Lhomme, Marie organization: Institute of Cardiometabolism and Nutrition (ICAN), Paris, France – sequence: 6 givenname: Eric surname: Frisdal fullname: Frisdal, Eric organization: Sorbonne University, Paris, France – sequence: 7 givenname: Sandrine surname: Lanfranchi-Lebreton fullname: Lanfranchi-Lebreton, Sandrine organization: Sorbonne University, Paris, France – sequence: 8 givenname: Lucrèce surname: Matheron fullname: Matheron, Lucrèce organization: Sorbonne University, Paris, France – sequence: 9 givenname: Fabiana surname: Rached fullname: Rached, Fabiana organization: Heart Institute-InCor, University of Sao Paulo, Brazil – sequence: 10 givenname: Maharajah surname: Ponnaiah fullname: Ponnaiah, Maharajah organization: Institute of Cardiometabolism and Nutrition (ICAN), Paris, France – sequence: 11 givenname: Carlos V surname: Serrano, Jr fullname: Serrano, Jr, Carlos V organization: Heart Institute-InCor, University of Sao Paulo, Brazil – sequence: 12 givenname: Raul D surname: Santos fullname: Santos, Raul D organization: Heart Institute-InCor, University of Sao Paulo, Brazil – sequence: 13 givenname: Fernando surname: Brites fullname: Brites, Fernando organization: Laboratory of Lipids and Atherosclerosis, Department of Clinical Biochemistry, INFIBIOC, University of Buenos Aires, CONICET, Argentina – sequence: 14 givenname: Gerard surname: Bolbach fullname: Bolbach, Gerard organization: Sorbonne University, Paris, France – sequence: 15 givenname: Emmanuel surname: Gautier fullname: Gautier, Emmanuel organization: Sorbonne University, Paris, France – sequence: 16 givenname: Thierry surname: Huby fullname: Huby, Thierry organization: Sorbonne University, Paris, France – sequence: 17 givenname: Alain surname: Carrie fullname: Carrie, Alain organization: Sorbonne University, Paris, France – sequence: 18 givenname: Eric surname: Bruckert fullname: Bruckert, Eric organization: AP-HP, Groupe hospitalier Pitié-Salpétrière, Paris, France – sequence: 19 givenname: Maryse surname: Guerin fullname: Guerin, Maryse organization: Sorbonne University, Paris, France – sequence: 20 givenname: Philippe surname: Couvert fullname: Couvert, Philippe organization: Sorbonne University, Paris, France – sequence: 21 givenname: Philippe surname: Giral fullname: Giral, Philippe organization: AP-HP, Groupe hospitalier Pitié-Salpétrière, Paris, France – sequence: 22 givenname: Philippe surname: Lesnik fullname: Lesnik, Philippe organization: Sorbonne University, Paris, France – sequence: 23 givenname: Wilfried surname: Le Goff fullname: Le Goff, Wilfried organization: Sorbonne University, Paris, France – sequence: 24 givenname: Isabelle surname: Guillas fullname: Guillas, Isabelle organization: Sorbonne University, Paris, France – sequence: 25 givenname: Anatol surname: Kontush fullname: Kontush, Anatol organization: Sorbonne University, Paris, France |
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| Keywords | atherosclerosis CETP apolipoproteins lipoprotein metabolism HDL function LCAT Lipoprotein lipase HDL metabolism chylomicrons postprandial lipid metabolism |
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| Title | Free cholesterol transfer to high-density lipoprotein (HDL) upon triglyceride lipolysis underlies the U-shape relationship between HDL-cholesterol and cardiovascular disease |
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