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. 2023 Sep;23(18):e2200482.
doi: 10.1002/pmic.202200482. Epub 2023 Jun 27.

Bovine milk-derived extracellular vesicles enhance doxorubicin sensitivity in triple negative breast cancer cells by targeting metabolism and STAT signalling

Rahul Sanwlani  1 , Taeyoung Kang  1 , Sriram Gummadi  1 , Christina Nedeva  1 , Ching-Seng Ang  2 , Suresh Mathivanan  1
Affiliations

Bovine milk-derived extracellular vesicles enhance doxorubicin sensitivity in triple negative breast cancer cells by targeting metabolism and STAT signalling

Rahul Sanwlani et al. Proteomics. 2023 Sep.

Abstract

Metastatic triple-negative breast cancer (TNBC) has a low 5-year survival rate of below 30% with systemic chemotherapy being the most widely used treatment. Bovine milk-derived extracellular vesicles (MEVs) have been previously demonstrated to have anti-cancer attributes. In this study, we isolated bovine MEVs from commercial milk and characterised them according to MISEV guidelines. Bovine MEVs sensitised TNBC cells to doxorubicin, resulting in reduced metabolic potential and cell-viability. Label-free quantitative proteomics of cells treated with MEVs and/or doxorubicin suggested that combinatorial treatment depleted various pro-tumorigenic interferon-inducible gene products and proteins with metabolic function, previously identified as therapeutic targets in TNBC. Combinatorial treatment also led to reduced abundance of various STAT proteins and their downstream oncogenic targets with roles in cell-cycle and apoptosis. Taken together, this study highlights the ability of bovine MEVs to sensitise TNBC cells to standard-of-care therapeutic drug doxorubicin, paving the way for novel treatment regimens.

Keywords: bovine milk-derived extracellular vesicles; cancer chemotherapy; dietary extracellular vesicles; species crosstalk; stat signalling; triple-negative breast cancer.

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