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Atherosclerosis/Lipoproteins

Mipomersen, an Antisense Oligonucleotide to Apolipoprotein B-100, Reduces Lipoprotein(a) in Various Populations With Hypercholesterolemia

Results of 4 Phase III Trials

Raul D. Santos, Frederick J. Raal, Alberico L. Catapano, Joseph L. Witztum, Elisabeth Steinhagen-Thiessen, Sotirios Tsimikas
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https://doi.org/10.1161/ATVBAHA.114.304549
Arteriosclerosis, Thrombosis, and Vascular Biology. 2015;ATVBAHA.114.304549
Originally published January 22, 2015
Raul D. Santos
From the Lipid Clinic Heart Institute (InCor), University of São Paulo Medical School Hospital, São Paulo, Brazil (R.D.S.); Carbohydrate and Lipid Metabolism Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa (F.J.R.); Department of Pharmacological and Biomolecular Sciences, University of Milan, IRCCS Multimedica, Milan, Italy (A.L.C.); Lipid Ambulatory Clinic, Charite-Universitaetsmedizin Berlin, Berlin, Germany (E.S.-T.); and University of California San Diego, La Jolla (J.L.W., S.T.).
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Frederick J. Raal
From the Lipid Clinic Heart Institute (InCor), University of São Paulo Medical School Hospital, São Paulo, Brazil (R.D.S.); Carbohydrate and Lipid Metabolism Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa (F.J.R.); Department of Pharmacological and Biomolecular Sciences, University of Milan, IRCCS Multimedica, Milan, Italy (A.L.C.); Lipid Ambulatory Clinic, Charite-Universitaetsmedizin Berlin, Berlin, Germany (E.S.-T.); and University of California San Diego, La Jolla (J.L.W., S.T.).
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Alberico L. Catapano
From the Lipid Clinic Heart Institute (InCor), University of São Paulo Medical School Hospital, São Paulo, Brazil (R.D.S.); Carbohydrate and Lipid Metabolism Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa (F.J.R.); Department of Pharmacological and Biomolecular Sciences, University of Milan, IRCCS Multimedica, Milan, Italy (A.L.C.); Lipid Ambulatory Clinic, Charite-Universitaetsmedizin Berlin, Berlin, Germany (E.S.-T.); and University of California San Diego, La Jolla (J.L.W., S.T.).
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Joseph L. Witztum
From the Lipid Clinic Heart Institute (InCor), University of São Paulo Medical School Hospital, São Paulo, Brazil (R.D.S.); Carbohydrate and Lipid Metabolism Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa (F.J.R.); Department of Pharmacological and Biomolecular Sciences, University of Milan, IRCCS Multimedica, Milan, Italy (A.L.C.); Lipid Ambulatory Clinic, Charite-Universitaetsmedizin Berlin, Berlin, Germany (E.S.-T.); and University of California San Diego, La Jolla (J.L.W., S.T.).
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Elisabeth Steinhagen-Thiessen
From the Lipid Clinic Heart Institute (InCor), University of São Paulo Medical School Hospital, São Paulo, Brazil (R.D.S.); Carbohydrate and Lipid Metabolism Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa (F.J.R.); Department of Pharmacological and Biomolecular Sciences, University of Milan, IRCCS Multimedica, Milan, Italy (A.L.C.); Lipid Ambulatory Clinic, Charite-Universitaetsmedizin Berlin, Berlin, Germany (E.S.-T.); and University of California San Diego, La Jolla (J.L.W., S.T.).
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Sotirios Tsimikas
From the Lipid Clinic Heart Institute (InCor), University of São Paulo Medical School Hospital, São Paulo, Brazil (R.D.S.); Carbohydrate and Lipid Metabolism Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa (F.J.R.); Department of Pharmacological and Biomolecular Sciences, University of Milan, IRCCS Multimedica, Milan, Italy (A.L.C.); Lipid Ambulatory Clinic, Charite-Universitaetsmedizin Berlin, Berlin, Germany (E.S.-T.); and University of California San Diego, La Jolla (J.L.W., S.T.).
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Abstract

Objective—Lp(a) is an independent, causal, genetic risk factor for cardiovascular disease and aortic stenosis. Current pharmacological lipid-lowering therapies do not optimally lower Lp(a), particularly in patients with familial hypercholesterolemia (FH).

Approach and Results—In 4 phase III trials, 382 patients on maximally tolerated lipid-lowering therapy were randomized 2:1 to weekly subcutaneous mipomersen 200 mg (n=256) or placebo (n=126) for 26 weeks. Populations included homozygous FH, heterozygous FH with concomitant coronary artery disease (CAD), severe hypercholesterolemia, and hypercholesterolemia at high risk for CAD. Lp(a) was measured 8× between baseline and week 28 inclusive. Of the 382 patients, 57% and 44% had baseline Lp(a) levels >30 and >50 mg/dL, respectively. In the pooled analysis, the mean percent decrease (median, interquartile range in Lp(a) at 28 weeks was significantly greater in the mipomersen group compared with placebo (−26.4 [−42.8, −5.4] versus −0.0 [−10.7, 15.3]; P<0.001). In the mipomersen group in patients with Lp(a) levels >30 or >50 mg/dL, attainment of Lp(a) values ≤30 or ≤50 mg/dL was most frequent in homozygous FH and severe hypercholesterolemia patients. In the combined groups, modest correlations were present between percent change in apolipoprotein B-100 and Lp(a) (r=0.43; P<0.001) and low-density lipoprotein cholesterol and Lp(a) (r=0.36; P<0.001) plasma levels.

Conclusions—Mipomersen consistently and effectively reduced Lp(a) levels in patients with a variety of lipid abnormalities and cardiovascular risk. Modest correlations were present between apolipoprotein B-100 and Lp(a) lowering but the mechanistic relevance mediating Lp(a) reduction is currently unknown.

  • antisense oligonucleotide
  • coronary artery disease
  • dyslipidemias
  • hyperlipoproteinemia type II
  • hypolipidemic agents
  • Received August 29, 2014.
  • Accepted January 3, 2015.
  • © 2015 American Heart Association, Inc.
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    Mipomersen, an Antisense Oligonucleotide to Apolipoprotein B-100, Reduces Lipoprotein(a) in Various Populations With Hypercholesterolemia
    Raul D. Santos, Frederick J. Raal, Alberico L. Catapano, Joseph L. Witztum, Elisabeth Steinhagen-Thiessen and Sotirios Tsimikas
    Arteriosclerosis, Thrombosis, and Vascular Biology. 2015;ATVBAHA.114.304549, originally published January 22, 2015
    https://doi.org/10.1161/ATVBAHA.114.304549

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    Mipomersen, an Antisense Oligonucleotide to Apolipoprotein B-100, Reduces Lipoprotein(a) in Various Populations With Hypercholesterolemia
    Raul D. Santos, Frederick J. Raal, Alberico L. Catapano, Joseph L. Witztum, Elisabeth Steinhagen-Thiessen and Sotirios Tsimikas
    Arteriosclerosis, Thrombosis, and Vascular Biology. 2015;ATVBAHA.114.304549, originally published January 22, 2015
    https://doi.org/10.1161/ATVBAHA.114.304549
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