Human mammospheres secrete hormone-regulated active extracellular vesicles
Esperanza Gonzalez1, Marco Piva2, Eva Rodriguez-Suarez3
1Metabolomics CIBERehd, Derio, Spain.
Plos One
|January 10, 2014
Summary
Extracellular vesicles secreted by breast cancer stem cells may serve as early diagnostic markers. These vesicles influence cancer progression by altering gene expression related to epithelial-mesenchymal transition and stem cell traits.
Area of Science:
- Oncology
- Cell Biology
- Biochemistry
Background:
- Breast cancer is a major global health concern, with early detection being crucial for patient survival.
- Extracellular vesicles (EVs) are increasingly recognized for their potential in cancer diagnostics and prognostics.
- Stem/progenitor cells play a significant role in cancer development and progression.
Purpose of the Study:
- To investigate the secretion of EVs by breast cancer stem/progenitor cells.
- To identify proteins within these EVs and their response to hormonal changes.
- To determine the functional impact of these EVs on cancer progression markers.
Main Methods:
- Primary breast epithelial cells enriched for stem/progenitor cells were cultured as mammospheres.
- Proteomic analysis was employed to identify proteins in secreted EVs.
- Gene expression analysis was performed to assess the impact of EVs on epithelial-mesenchymal transition and stem cell markers.
Main Results:
- Mammospheres secreted EVs whose protein content was modulated by hormonal environment.
- These EVs were found to alter the expression of genes associated with epithelial-mesenchymal transition.
- EVs also affected the expression of key stem cell markers in recipient cells.
Conclusions:
- Secreted EVs from breast cancer stem/progenitor cells show potential as diagnostic and prognostic biomarkers.
- EVs may actively contribute to breast cancer progression through modulation of gene expression.
- Further research into EVs could lead to novel therapeutic strategies for breast cancer.
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