Cited by 219Cholesterol and Lipid MetabolismMicroRNA in disease regulationLipoproteins and Cardiovascular Health

Control of Cholesterol Metabolism and Plasma High-Density Lipoprotein Levels by microRNA-144

Open access
Ramírez, Cristina M., Rotllan, Noemi, Vlassov, Alexander V., Dávalos, Alberto, Li, Mu, Goedeke, Leigh, Aranda, Juan F., Cirera-Salinas, Daniel +8 more·2013·Circulation Research

Abstract

Rationale: Foam cell formation because of excessive accumulation of cholesterol by macrophages is a pathological hallmark of atherosclerosis, the major cause of morbidity and mortality in Western societies. Liver X nuclear receptors (LXRs) regulate the expression of the adenosine triphosphate–binding cassette (ABC) transporters, including adenosine triphosphate–binding cassette transporter A1 (ABCA1) and adenosine triphosphate–binding cassette transporter G1 (ABCG1). ABCA1 and ABCG1 facilitate the efflux of cholesterol from macrophages and regulate high-density lipoprotein (HDL) biogenesis. Increasing evidence supports the role of microRNA (miRNAs) in regulating cholesterol metabolism through ABC transporters. Objective: We aimed to identify novel miRNAs that regulate cholesterol metabolism in macrophages stimulated with LXR agonists. Methods and Results: To map the miRNA expression signature of macrophages stimulated with LXR agonists, we performed an miRNA profiling microarray analysis in primary mouse peritoneal macrophages stimulated with LXR ligands. We report that LXR ligands increase miR-144 expression in macrophages and mouse livers. Overexpression of miR-144 reduces ABCA1 expression and attenuates cholesterol efflux to apolipoproteinA1 in macrophages. Delivery of miR-144 oligonucleotides to mice attenuates ABCA1 expression in the liver, reducing HDL levels. Conversely, silencing of miR-144 in mice increases the expression of ABCA1 and plasma HDL levels. Thus, miR-144 seems to regulate both macrophage cholesterol efflux and HDL biogenesis in the liver. Conclusions: miR-144 regulates cholesterol metabolism via suppressing ABCA1 expression and modulation of miRNAs may represent a potential therapeutical intervention for treating dyslipidemia and atherosclerotic vascular disease.

AI snapshot

Written from the paper’s full text.

TL;DR

miR-144 is induced by LXR ligands in macrophages and liver and directly represses ABCA1, reducing macrophage cholesterol efflux and hepatic HDL biogenesis. In mice, miR-144 overexpression lowers plasma HDL, whereas miR-144 inhibition raises ABCA1 and HDL, suggesting anti-miR-144 as a possible dyslipidemia/atherosclerosis strategy.

Key findings

  • An unbiased miRNA microarray in T090-treated mouse peritoneal macrophages identified 32 differentially regulated miRNAs; miR-144 was predicted to target lipid-metabolism genes and had 7 potential binding sites in the ABCA1 3′UTR.
  • miR-144 overexpression reduced ABCA1 mRNA/protein and attenuated cholesterol efflux to ApoA1 in macrophages; anti-miR-144 increased ABCA1 and efflux. In vivo, miR-144 mimic delivery produced a 250-fold increase in liver miR-144, reduced liver ABCA1, and significantly lowered total and HDL cholesterol without changing TG or other lipoprotein distributions.
  • miR-144 inhibition reduced miR-144 levels and increased liver ABCA1 protein; after T090, miR-144 was induced 2.3-fold and inhibited 2.1-fold by anti-miR-144, with increased plasma HDL cholesterol.
  • miR-33 and miR-144 co-transfection reduced Abca1 3′UTR luciferase activity by 60%, compared with 30–40% suppression by either miRNA alone, suggesting additive regulation of ABCA1.

Methods

  • Primary mouse peritoneal macrophages were stimulated with 3 μmol/L T090 for 24 h and profiled by Illumina miRNA microarrays; differential expression used unpaired t-test with p<0.2 and fold change ≥1.5, without multiple-testing correction.
  • In vitro studies used miR-144 mimics/inhibitors in mouse peritoneal macrophages, J774, THP-1, HepG2, Huh-7, Hepa, and EAhy926 cells; ABCA1/ABCG1 expression, 3′UTR luciferase reporters, and 3H-cholesterol efflux to ApoA1 were measured.
  • In vivo, 8-week-old male C57BL/6 mice were randomized into 4 groups (n=24 total; n=6/group) and injected intravenously twice every three days with control or miR-144 mimic/inhibitor at 7 mg/kg; some mice also received T090 (10 mg/kg) by oral gavage. Plasma lipids and FPLC lipoprotein fractions were analyzed.

Limitations

  • The paper states that detailed methods are in the supplemental material due to space limits, and that whether LXR regulates pri-miR-144/451 by direct promoter interaction remains unanswered; further experiments are warranted to understand transcriptional regulation.
  • The paper notes that the lack of further cholesterol-efflux reduction with combined miR-33/miR-144 may reflect the very low 5 nM mimic dose and T090-induced endogenous miR-144 in hepatic cells but not in COS-7 cells used for 3′UTR assays.
  • Evident from the text: the microarray screen used a relaxed p<0.2 threshold with no multiple-testing correction, in vivo groups were small (n=6), and the study reports lipid/HDL endpoints rather than atherosclerosis outcomes.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1161/circresaha.112.300626

Cites

36 of 36 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 1 cited sources checked · 0 supported · 0 flagged

  • Findingown data

    Delivery of miR-144 oligonucleotides to mice attenuates ABCA1 expression in the liver.

    “Delivery of miR-144 oligonucleotides to mice attenuates ABCA1 expression in the liver, reducing HDL levels.”
    • Also stated in: § INTRODUCTION · plain
      “in vivo delivery of miR-144 to mice represses ABCA1 expression in the liver, reducing circulating HDL levels.”
    Quote in the paperSubstantial claim
  • Findingown data

    miR-144 overexpression slightly reduces ABCG1 expression in macrophages.

    “In contrast to ABCA1, ABCG1 expression was slightly reduced in miR-144 over-expressing macrophages.”
    Quote in the paperNot a substantial claim
  • Findingown data

    miR-144 overexpression down-regulates ABCG1 mRNA in macrophages.

    “Moreover ABCG1 was also down-regulated at the mRNA level in macrophages transfected with miR-144 (Figure 3A, right panel).”
    Quote in the paperSubstantial claim
  • Findingown data

    Transfection of mouse peritoneal macrophages with miR-144 increases its expression 350-fold.

    “Transfection of mouse peritoneal macrophages with miR-144 increased its expression 350-fold (not shown) and significantly inhibited ABCA1 mRNA levels (Figure 3A, left panel).”
    Quote in the paperNot a substantial claim
  • Findingown data

    Hepatic miR-144 levels are regulated by high fat diet in vivo.

    “Interestingly, hepatic miR-144 levels are regulated by high fat diet in vivo (Online Figure IIIC, right panel).”
    Quote in the paperNot a substantial claim
  • May combine two claims. 14
  • Classified as probably not a substantial claim. 8
  • May combine two claims.

    Findingown data

    miR-144 is widely expressed in mouse tissues and particularly abundant in liver, spleen and aorta.

    “miR-144 was widely expressed in mouse tissues and is particularly abundant in the liver, spleen and aorta (Online Figure IIIA).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Co-transfection of miR-33 and miR-144 resulted in a 60% decrease in luciferase activity, whereas miR-144 or miR-33 alone suppressed 3'UTR activity by 30-40%.

    “Co-transfection of miR-33 and miR-144 resulted in a 60% decrease in luciferase activity whereas miR-144 or miR-33 alone suppressed the 3’UTR activity 30-40% (Figure 4B).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    miR-33 and miR-144 inhibited cholesterol efflux, but the combination did not further reduce cholesterol export in Huh-7 cells.

    “miR-33 and miR-144 inhibited cholesterol efflux but the combination of both miRNAs do not further reduced the cholesterol export in this human hepatic cell line (Figure 4C).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Plasma TG levels were slightly increased after T090 treatment but were not affected by anti-miR-144 treatment.

    “As expected plasma TG levels were slightly increased after T090 treatment but no differences were not affected by anti-miR-144 treatment (Figure 7D, right panel).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Antagonism of endogenous miR-144 increased ABCA1 expression and cellular cholesterol efflux to ApoA1 in J774 murine macrophages.

    “Importantly, antagonism of endogenous miR-144 increased ABCA1 expression (Figure 5B, upper panel) and cellular cholesterol efflux to ApoA1 (Figure 5B, bottom panel).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Treatment with miR-144 particles for 6 days reduced total cholesterol and HDL cholesterol levels without changes in TG or cholesterol distribution in other lipoproteins.

    “The inhibition of ABCA1 expression after 6 days of treatment with miR-144 particles leads to a significant reduction in total cholesterol and HDL cholesterol levels without changes in TG or cholesterol distribution in other lipoproteins (Figure 6C and D).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    miR-144 overexpression inhibited ABCA1 expression and attenuated cholesterol efflux to ApoA1 in J774 murine macrophages.

    “As expected, miR-144 over-expression inhibited ABCA1 expression (Figure 5A, upper panel) and attenuated cholesterol efflux to ApoA1 (Figure 5A, bottom panel).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    miR-144 inhibition in basal conditions reduced miR-144 levels and increased liver ABCA1 protein expression without changes at the mRNA level.

    “The data show that miR-144 inhibition in basal conditions resulted in a significant reduction of miR-144 levels (Figure 7A) and an increase of liver ABCA1 protein expression without changes at the mRNA level (Figure 7B and C upper panel).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Inhibition of miR-144 does not alter miR-33 levels, and miR-33 inhibition does not change miR-144 expression.

    “As seen in Online Figure VIA, inhibition of miR-144 does not alter miR-33 levels and miR-33 inhibition does not change miR-144 expression.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Under T090-induced conditions, miR-144 was induced 2.3-fold and inhibited 2.1-fold after anti-miR-144 injection.

    “Under this condition, miR-144 was induced 2.3-fold and inhibited 2.1-fold after the injection of anti-miR-144 oligonucleotides (Figure 7A).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data

    miR-144 appears to regulate both macrophage cholesterol efflux and HDL biogenesis in the liver.

    “Thus, miR-144 appears to regulate both macrophage cholesterol efflux and HDL biogenesis in the liver.”
    • Also stated in: § INTRODUCTION · hedged
      “Thus, miR-144 appears to regulate both macrophage cholesterol efflux and HDL biogenesis in the liver.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductcitation

    The 1.5-fold-change threshold was chosen based on previously published articles employing these microarrays.

    “The 1.5-fold-change threshold was chosen on the basis of its use in previously published articles employing these particular types of microarrays.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    Quadruplicates for each condition were used for microarray analysis.

    “Quadruplicates for each condition were used for microarray analysis.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Expression of both ABCA1 and ABCG1 is up-regulated in states of cholesterol excess by LXR.

    “The expression of both ABCA1 and ABCG1 are up-regulated in states of cholesterol excess by LXR 9.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [9] Venkateswaran A Laffitte BA Joseph SB Mak PA Wilpitz DC Edwards PA Tontonoz P Control of cellular cholesterol efflux by the nuclear oxysterol receptor lxr alpha Proc Natl Acad Sci U S A 2000 97 12097 12102 11035776 PMC17300 source
  • Classified as probably not a substantial claim.

    Study design and conductown data

    Mice were randomized into four groups.

    “Eight-week-old male C57BL/6 mice were randomized into 4 groups (n= 24 mice): non-targeting control mimic (Con-mir, n=6), miR-144-mimic (miR-144, n=6), inhibitor negative control sequence (Con-inh, n=6) and miR-144-inhibitors (Inh-miR-144).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationown data

    miR-144 overexpression reduces circulating HDL, and miR-144 inhibition increases circulating HDL.

    “Altogether, these results establish that miR-144 overexpression or inhibition reduces and increases circulating HDL, respectively.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductnone given

    Purity and integrity of total RNA and enriched miRNA were verified using Agilent Bioanalyzer.

    “The purity and integrity of both the total RNA sample and the enriched miRNA was verified using the Agilent Bioanalyzer (Agilent Technologies, Santa Clara, CA).”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    miR-33 is an intronic miRNA encoded in the Srebp genes and regulates ABCA1 expression.

    “We have previously reported that miR-33, an intronic miRNA encoded in the Srebp genes, regulates ABCA1 expression.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Study design and conductown data

    miR-144 over-expression and knockdown were verified using qPCR.

    “Verification of miR-144 over-expression and knockdown was determined using qPCR, as described above.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim.

    Study design and conductown data

    All experimental control samples were treated with equal concentration of non-targeting control mimic or inhibitor negative control to control for non-sequence-specific effects.

    “All experimental control samples were treated with an equal concentration of a non-targeting control mimic sequence (Con-miR) or inhibitor negative control sequence (Con-inh), for use as controls for non-sequence-specific effects in miRNA experiments.”
    Quote in the paperSubstantial claim
20 of 20
  • The paper relies on this without support.

    ABCA1 and ABCG1 facilitate cholesterol efflux from macrophages and regulate HDL biogenesis.

    “ABCA1 and ABCG1 facilitate the efflux of cholesterol from macrophages and regulate high-density lipoprotein (HDL) biogenesis.”
    “Several ABC transporters, including ABCA1 and ABCG1, facilitate the efflux of cholesterol from macrophages.”
  • The paper relies on this without support.

    In the liver, ABCA1 plays a critical role in HDL biogenesis and its deficiency leads to a dramatic reduction of plasma HDL levels.

    “In the liver, ABCA1 also plays a critical role in the biogenesis of HDL and its deficiency leads to a dramatic reduction of plasma HDL levels.”
  • The paper relies on this without support.

    ABCA1 plays a critical role in regulating cellular cholesterol efflux to ApoA1.

    “ABCA1 plays a critical role in regulating cellular cholesterol efflux to ApoA1.”
  • The paper relies on this without support.

    ABCA1 plays a key role in regulating HDL biogenesis in the liver.

    “In addition to regulating cellular cholesterol efflux, ABCA1 plays a key role in regulating HDL biogenesis in the liver.”
  • The paper relies on this without support.

    Hepatic ABCA1 is critical for the generation of plasma HDL.

    “Finally, because hepatic ABCA1 is critical for the generation of plasma HDL, it seems likely that a combination therapy that includes both miR-144 and miR-33 antisense oligonucleotides might result in increased HDL levels, thus improving the prognosis for patients with cardiovascular disease.”
5 of 5

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Authors
Ramírez, C. M., Rotllan, N., Vlassov, A. V., Dávalos, A., Li, M., Goedeke, L., Aranda, J. F., Cirera-Salinas, D., Araldi, E., Salerno, A., Wanschel, A., Zavadil, J., Castrillo, A., Kim, J., Suárez, Y., & Fernández-Hernando, C.
Affiliations
  • Universidad de Las Palmas de Gran Canaria (ES)
  • From the Leon H. Charney Division of Cardiology, Departments of Medicine and Cell Biology and the Marc and Ruti Bell Vascular Biology and Disease Program (C.M.R., N.R., A.D., L.G., J.F.A., D.C.-S., E.A., A.S., A.W., Y.S., C.F.-H.), Department of Pathology, New York University Center for Health Informatics and Bioinformatics (J.Z.), New York University School of Medicine, New York, New York; Life Technologies, Austin, Texas (A.V.V., M.L.); Instituto de Investigaciones Biomédicas “Alberto Sols,”...
Venue
Circulation Research
Published
2013-06-07
Volume
112
Issue
12
Pages
1592-1601
ISSN
  • 0009-7330 (ISSN-L)
  • 1524-4571
OpenAlex
W2120525672
Cited by
217
References
37
Citations by year
2026: 7 · 2025: 8 · 2024: 4 · 2023: 9 · 2022: 15 · 2021: 13 · 2020: 12 · 2019: 20 · 2018: 14 · 2017: 15 · 2016: 25 · 2015: 25 · 2014: 41 · 2013: 9
FWCI
29.92
Type
journal article
Language
en
Open access
Locations
  • Circulation Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (submittedVersion)
  • PubMed Central (submittedVersion)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion)
Funders
  • American Heart Association
  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
  • National Institutes of Health (5p30ns069329-02)
  • National Institute on Aging (P30 AG0 28383)
  • National Heart, Lung, and Blood Institute (R01HL105945, R01 HL106063, R01HL107953)
  • National Institute of Neurological Disorders and Stroke (P30-NS069329)
Topics
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
Keywords
microRNA-144, cholesterol metabolism, high-density lipoprotein, ABCA1, ABCG1, liver X receptor, macrophage cholesterol efflux, foam cell formation, atherosclerosis, HDL biogenesis, dyslipidemia, miRNA expression profiling, apolipoprotein A-I
MeSH terms
Liver X Receptors, Benzenesulfonamides, Animals, Anticholesteremic Agents, Chlorocebus aethiops, Fluorocarbons, Homeostasis, Humans, Hydrocarbons, Fluorinated, Cholesterol, HDL, Macrophages, Male, Mice, Inbred C57BL, Oligonucleotides, Sulfonamides, Apolipoprotein A-I, Mice, Knockout, ATP-Binding Cassette Transporters, COS Cells, Oligonucleotide Array Sequence Analysis, Gene Expression Profiling, Hepatocytes, MicroRNAs, Mice, Hep G2 Cells, Orphan Nuclear Receptors, Diet, High-Fat, ATP Binding Cassette Transporter 1

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