Cited by 491Lipid metabolism and disordersLipoproteins and Cardiovascular HealthLymphatic Disorders and Treatments

Targeting APOC3 in the familial chylomicronemia syndrome

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Gaudet, Daniel, Brisson, Diane, Tremblay, Karine, Alexander, Veronica J., Singleton, Walter, Hughes, Steven G., Geary, Richard S., Baker, Brenda F. +3 more·2014·New England Journal of Medicine

Abstract

The familial chylomicronemia syndrome is a genetic disorder characterized by severe hypertriglyceridemia and recurrent pancreatitis due to a deficiency in lipoprotein lipase (LPL). Currently, there are no effective therapies except for extreme restriction in the consumption of dietary fat. Apolipoprotein C-III (APOC3) is known to inhibit LPL, although there is also evidence that APOC3 increases the level of plasma triglycerides through an LPL-independent mechanism. We administered an inhibitor of APOC3 messenger RNA (mRNA), called ISIS 304801, to treat three patients with the familial chylomicronemia syndrome and triglyceride levels ranging from 1406 to 2083 mg per deciliter (15.9 to 23.5 mmol per liter). After 13 weeks of study-drug administration, plasma APOC3 levels were reduced by 71 to 90% and triglyceride levels by 56 to 86%. During the study, all patients had a triglyceride level of less than 500 mg per deciliter (5.7 mmol per liter) with treatment. These data support the role of APOC3 as a key regulator of LPL-independent pathways of triglyceride metabolism.

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Integrity signals

Registry

Crossref · 10.1056/nejmoa1400284

Cites

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  • Plozasiran reduces hepatic APOC-III production by inhibiting mRNA transcription.

    “Plozasiran, a siRNA-based therapeutic, reduces hepatic APOC-III production by inhibiting mRNA transcription [15].”

    From The Efficacy and Safety of Plozasiran on Lipid Profile in Dyslipidemic Disorders: A Systematic Review and Meta-Analysis (2026) · cites this paper as [15]

    The introductory passage identifies the studied drug as ISIS 304801, an antisense inhibitor—not plozasiran, a siRNA therapeutic. It says ISIS 304801 binds APOC3 mRNA and triggers its degradation by RNase H1, rather than inhibiting mRNA transcription. Our copy makes no claim about plozasiran itself. (LLM, conf=0.83)

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  • Volanesorsen is an antisense oligonucleotide that targets APOC3 mRNA and reduces plasma apolipoprotein C-III levels, chylomicronemia, and plasma triglyceride levels.

    “Volanesorsen is an antisense oligonucleotide that targets APOC3 messenger RNA (mRNA) and reduces plasma apolipoprotein C-III levels, as well as the degree of chylomicronemia and plasma triglyceride levels.”

    From Olezarsen, Acute Pancreatitis, and Familial Chylomicronemia Syndrome (2024) · cites this paper as [23]

    The paper’s description of ISIS 304801 states that it binds APOC3 mRNA, and its Summary and ‘APOC3 Inhibition and Lipid Response’ sections report reductions in plasma APOC3, triglycerides, and measures of chylomicronemia. Our copy does not identify ISIS 304801 as volanesorsen, so it does not establish that the named drug is the one studied. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • ApoCIII is a pleiotropic regulator of triglyceride-rich lipoprotein metabolism through LPL-dependent and LPL-independent pathways.

    “We now understand apoCIII as a pleiotropic regulator of TGRL metabolism through LPL-dependent and LPLindependent pathways”
  • Volanesorsen has been approved in the European Union and the United Kingdom for treatment of familial chylomicronemia syndrome and in Brazil for familial chylomicronemia syndrome and familial partial lipodystrophy.

    “The agent has been approved in the European Union and the United Kingdom for the treatment of familial chylomicronemia syndrome and in Brazil for the treatment of familial chylomicronemia syndrome and familial partial lipodystrophy. 23-25”

    From Olezarsen, Acute Pancreatitis, and Familial Chylomicronemia Syndrome (2024) · cites this paper as [23]

    The Summary and Study Treatment sections describe a trial of ISIS 304801 in three patients, not regulatory approval. The paper mentions European approval of a different therapy, Glybera, but passages retrieved for approval, Brazil, and familial partial lipodystrophy do not address the claimed approvals of volanesorsen in the EU, UK, or Brazil. Page numbers are unavailable in our copy. (LLM, conf=0.76)

    Experimental — accuracy not yet measured
  • Olezarsen appears to provide improved safety compared with volanesorsen while maintaining effective triglyceride reduction.

    “Olezarsen appears to mitigate these risks while maintaining effective TG reduction [31][32][33]”

    From Efficacy of Olezarsen in Severe Hypertriglyceridemia and Acute Pancreatitis Risk: A Systematic Review and Meta-Analysis of Randomized Controlled Trials (2026) · cites this paper as [32]

    The APOC3 Inhibition and Lipid Response section reports triglyceride reductions with ISIS 304801 in three patients, not with olezarsen. Searches for olezarsen, a safety comparison with volanesorsen, and adverse events found no passage in our copy addressing whether olezarsen mitigates those risks while retaining triglyceride-lowering efficacy. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

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Cites

Flagged first, then by citations

Research works printed but not linked: 3

  1. [1]1. Brunzell JD, Deeb SS. Familial lipo- protein lipase deficiency, apo CII defi- ciency and hepatic lipase deficiency In: Scriver CR, Beaudet AI, Sly WS, Valle D, eds. The metabolic and molecular basis of inherited disease. 8th ed. New York: McGraw-Hill, 2000:2789-816.
  2. [3]3. Chait A, Brunzell JD. Chylomicronemia syndrome. Adv Intern Med 1992;37:249-73.
  3. [12]12. Ito Y, Azrolan N, O'Connell A, Walsh A, Breslow JL. Hypertriglyceridemia as a result of human apo CIII gene expres- sion in transgenic mice. Science 1990;249: 790-3.

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Authors
Gaudet, D., Brisson, D., Tremblay, K., Alexander, V. J., Singleton, W., Hughes, S. G., Geary, R. S., Baker, B. F., Graham, M. J., Crooke, R. M., & Witztum, J. L.
Affiliations
  • University of California San Diego (US)
  • Université de Montréal (CA)
  • Ionis Pharmaceuticals (United States) (US)
Venue
New England Journal of Medicine
Published
2014-12-04
Volume
371
Issue
23
Pages
2200-2206
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2032456325
Cited by
491
References
31
Citations by year
2026: 32 · 2025: 39 · 2024: 32 · 2023: 35 · 2022: 33 · 2021: 38 · 2020: 54 · 2019: 39 · 2018: 48 · 2017: 47 · 2016: 55 · 2015: 36 · 2014: 2
FWCI
31.98
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
  • Health Sciences › Medicine › Surgery › Lymphatic Disorders and Treatments
Keywords
familial chylomicronemia syndrome, apolipoprotein C-III, lipoprotein lipase, hypertriglyceridemia, recurrent pancreatitis, triglyceride metabolism, plasma triglycerides
MeSH terms
Humans, Lipoprotein Lipase, Hyperlipoproteinemia Type I, Mutation, Oligonucleotides, RNA, Messenger, Triglycerides, Apolipoprotein C-III

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