Journal
CANCER & METABOLISM
Volume 5, Issue -, Pages -Publisher
BMC
DOI: 10.1186/s40170-016-0163-7
Keywords
Obesity; Breast cancer; Lipid metabolism; Adipocytes; Metabolic crosstalk
Categories
Funding
- Sydney Medical School Foundation
- University of Sydney
- Cancer Institute New South Wales
- Sydney Catalyst
- Australian Postgraduate Award
- Baxter Family Scholarship
- Dutch Cancer Institute KWF
- National Breast Cancer Foundation
- National Health and Medical Research Council [GNT1052963]
- NSW Office of Science and Medical Research
- Guest Family Fellowship
- Mostyn Family Foundation
- National Breast Cancer Foundation [ECF-12-05] Funding Source: researchfish
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Background: Obesity is associated with increased recurrence and reduced survival of breast cancer. Adipocytes constitute a significant component of breast tissue, yet their role in provisioning metabolic substrates to support breast cancer progression is poorly understood. Results: Here, we show that co-culture of breast cancer cells with adipocytes revealed cancer cell-stimulated depletion of adipocyte triacylglycerol. Adipocyte-derived free fatty acids were transferred to breast cancer cells, driving fatty acid metabolism via increased CPT1A and electron transport chain complex protein levels, resulting in increased proliferation and migration. Notably, fatty acid transfer to breast cancer cells was enhanced from obese adipocytes, concomitant with increased stimulation of cancer cell proliferation and migration. This adipocyte-stimulated breast cancer cell proliferation was dependent on lipolytic processes since HSL/ATGL knockdown attenuated cancer cell responses. Conclusions: These findings highlight a novel and potentially important role for adipocyte lipolysis in the provision of metabolic substrates to breast cancer cells, thereby supporting cancer progression.
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