Cited by 22Lipoproteins and Cardiovascular HealthCholesterol and Lipid MetabolismLipid metabolism and disorders

The DOI matches its Crossref record; 54 of the 56 references it cites were found in a registry or an index.

PCSK9 deficiency results in a specific shedding of excess LDLR in female mice only: Role of hepatic cholesterol

Open access
Roubtsova, Anna, Garçon, Damien, Lacoste, Sandrine, Chamberland, Ann, Marcinkiewicz, Jadwiga, Métivier, Raphaël, Sotin, Thibaud, Paquette, Martine, Bernard, Sophie, Cariou, Bertrand, Le May, Cédric, Koschinsky, Marlys L., Seidah, Nabil G., Prat, Annik·2022·Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids

Abstract

PCSK9 promotes the lysosomal degradation of cell surface LDL receptor (LDLR). We analyzed how excess LDLR generated by PCSK9 deficiency is differently handled in male and female mice to possibly unveil the mechanism leading to the lower efficacy of PCSK9 mAb on LDL-cholesterol levels in women. Analysis of intact or ovariectomized PCSK9 knockout (KO) mice supplemented with placebo or 17β-estradiol (E2) demonstrated that female, but not male mice massively shed the soluble ectodomain of the LDLR in the plasma. Liver-specific PCSK9 KO or alirocumab-treated WT mice exhibit the same pattern. This shedding is distinct from the basal one and is inhibited by ZLDI-8, a metalloprotease inhibitor pointing at ADAM10/ADAM17. In PCSK9 KO female mice, ZLDI-8 raises by 80 % the LDLR liver content in a few hours. This specific shedding is likely cholesterol-dependent: it is prevented in PCSK9 KO male mice that exhibit low intra-hepatic cholesterol levels without activating SREBP-2, and enhanced by mevalonate or high cholesterol feeding, or by E2 known to stimulate cholesterol synthesis via the estrogen receptor-α. Liver transcriptomics demonstrates that critically low liver cholesterol in ovariectomized female or knockout male mice also hampers the cholesterol-dependent G2/M transition of the cell cycle. Finally, higher levels of shed LDLR were measured in the plasma of women treated with PCSK9 mAb. PCSK9 knockout female mice hormonally sustain cholesterol synthesis and shed excess LDLR, seemingly like women. In contrast, male mice rely on high surface LDLR to replenish their stocks, despite 80 % lower circulating LDL.

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Crossref · 10.1016/j.bbalip.2022.159217

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Metadata

Authors
Roubtsova, A., Garçon, D., Lacoste, S., Chamberland, A., Marcinkiewicz, J., Métivier, R., Sotin, T., Paquette, M., Bernard, S., Cariou, B., Le May, C., Koschinsky, M. L., Seidah, N. G., & Prat, A.
Affiliations
  • Montreal Clinical Research Institute (CA)
  • Centre National de la Recherche Scientifique (FR)
  • Western University (CA)
  • Université du Québec à Montréal (CA)
Corresponding author
Prat, Annik
Venue
Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids
Publisher
Elsevier BV
Published
2022-12
Volume
1867
Issue
12
Pages
159217
ISSN
1388-1981 (ISSN-L)
OpenAlex
W4292261879
Cited by
22
References
56
Citations by year
2026: 1 · 2025: 5 · 2024: 9 · 2023: 6 · 2022: 1
FWCI
3.69
Type
journal article
Language
en
Open access
Locations
  • Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • HAL (submittedVersion, cc-by-nc)
Funders
Canadian Institutes of Health Research (145572, 148363, # 950-231335)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipoproteins and Cardiovascular Health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Cholesterol and Lipid Metabolism
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
Keywords
sex differences, liver cholesterol, estradiol, ovariectomy, ADAM10, ADAM17, SREBP2, mevalonate, estrogen receptor alpha, cholesterol biosynthesis, G2/M transition, PCSK9 monoclonal antibodies, alirocumab, PCSK9 knockout mice, LDL cholesterol
MeSH terms
Proprotein Convertase 9, Animals, Cholesterol, Estradiol, Female, Liver, Mevalonic Acid, Receptors, Cell Surface, Receptors, Estrogen, Receptors, LDL, Mice, Knockout, Metalloproteases, Mice, Sterol Regulatory Element Binding Protein 1

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