Cited by 146Cancer, Lipids, and MetabolismPI3K/AKT/mTOR signaling in cancerCholesterol and Lipid Metabolism

Mammary tumor growth and pulmonary metastasis are enhanced in a hyperlipidemic mouse model

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Alikhani, N, Ferguson, R D, Novosyadlyy, R, Gallagher, E J, Scheinman, E J, Yakar, S, LeRoith, D·2013·Oncogene

Abstract

Dyslipidemia has been associated with an increased risk for developing cancer. However, the implicated mechanisms are largely unknown. To explore the role of dyslipidemia in breast cancer growth and metastasis, we used the apolipoprotein E (ApoE) knockout mice (ApoE(-/-)), which exhibit marked dyslipidemia, with elevated circulating cholesterol and triglyceride levels in the setting of normal glucose homeostasis and insulin sensitivity. Non-metastatic Met-1 and metastatic Mvt-1 mammary cancer cells derived from MMTV-PyVmT/FVB-N transgenic mice and c-Myc/vegf tumor explants respectively, were injected into the mammary fat pad of ApoE(-/-) and wild-type (WT) females consuming a high-fat/high-cholesterol diet and tumor growth was evaluated. ApoE(-/-) mice exhibited increased tumor growth and displayed a greater number of spontaneous metastases to the lungs. Furthermore, intravenous injection of Mvt-1 cells resulted in a greater number of pulmonary metastases in the lungs of ApoE(-/-) mice compared with WT controls. To unravel the molecular mechanism involved in enhanced tumor growth in ApoE(-/-) mice, we studied the response of Mvt-1 cells to cholesterol in vitro. We found that cholesterol increased Akt(S473) phosphorylation in Mvt-1 cells as well as cellular proliferation, whereas cholesterol depletion in the cell membrane abrogated Akt(S473) phosphorylation induced by exogenously added cholesterol. Furthermore, in vivo administration of BKM120, a small-molecule inhibitor of phosphatidylinositol 3-kinase (PI3K), alleviated dyslipidemia-induced tumor growth and metastasis in Mvt-1 model with a concomitant decrease in PI3K/Akt signaling. Collectively, we suggest that the hypercholesterolemic milieu in the ApoE(-/-) mice is a favorable setting for mammary tumor growth and metastasis.

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  • Tumors grown in hypercholesterolemic mice (ApoE−/−) have increased PI3K and AKT signaling, and treatment with a PI3K inhibitor attenuated growth.

    “One example of this comes from tumors grown in hypercholesterolemic mice (ApoE−/−), which have increased PI3K and AKT signaling, and treatment with a PI3K inhibitor was able to attenuate growth (78).”

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  1. [28]Alexopoulos CG Blatsios B Avgerinos A Serum lipids and lipoprotein disorders in cancer patients Cancer 15 12 1987 60 12 3065 70 3677028
  2. [30]Halton JM Nazir DJ McQueen MJ Barr RD Blood lipid profiles in children with acute lymphoblastic leukemia Cancer 15 7 1998 83 2 379 84 9669823
  3. [40]Pei XF Noble MS Davoli MA Rosfjord E Tilli MT Furth PA Explant-cell culture of primary mammary tumors from MMTV-c-Myc transgenic mice In Vitro Cell Dev Biol Anim Jan-Feb 2004 40 1-2 14 21 15180438

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Authors
Alikhani, N., Ferguson, R. D., Novosyadlyy, R., Gallagher, E. J., Scheinman, E. J., Yakar, S., & LeRoith, D.
Affiliations
  • Mount Sinai Hospital (US)
  • Rambam Health Care Campus (IL)
Corresponding author
LeRoith, D
Venue
Oncogene
Published
2012-04-02
Volume
32
Issue
8
Pages
961-967
ISSN
  • 0950-9232 (ISSN-L)
  • 1476-5594
OpenAlex
W1982833706
Cited by
146
References
41
Citations by year
2026: 6 · 2025: 10 · 2024: 6 · 2023: 10 · 2022: 11 · 2021: 11 · 2020: 13 · 2019: 11 · 2018: 7 · 2017: 12 · 2016: 17 · 2015: 10 · 2014: 8 · 2013: 13 · 2012: 1
FWCI
3.40
Type
journal article
Language
en
Open access
Locations
  • Oncogene (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Israel Cancer Association
  • National Cancer Institute (R01CA128799)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Lipids, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
Keywords
dyslipidemia, hypercholesterolemia, breast cancer, mammary tumor growth, lung metastasis, ApoE-deficient mice, cholesterol, Akt phosphorylation, PI3K/Akt signaling, BKM120, high-fat high-cholesterol diet, c-Myc, vascular endothelial growth factor, tumor cell proliferation
MeSH terms
Animals, Disease Models, Animal, Female, Humans, Hypercholesterolemia, Lung Neoplasms, Mammary Neoplasms, Experimental, Mice, Transgenic, Neoplasm Metastasis, Signal Transduction, Cell Line, Tumor, Cell Growth Processes, Mice

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